What Are the Different Types of SMD Components? Full Guide

What Are the Different Types of SMD Components?

SMD components fall into two big families. Passive parts and active parts. Everything else is a branch on those two trees.

Passives include resistors, capacitors, inductors, and ferrite beads. Actives include diodes, transistors, integrated circuits, and oscillators. Then you get the odd cousins. Connectors, switches, fuses, relays, and LEDs.

Pick up any circuit board made in the last thirty years. You’re holding a small city of these parts. Most are smaller than a grain of rice.

Here in Phoenix, we see these boards every day. Reels of them. Trays of them. Whole pallets of them.

Some are worth real money. Some are worth almost nothing. Most people can’t tell the difference by looking.

That’s what this guide fixes. We’ll walk through every major SMD type. What it does, how to spot it, and what it’s worth when you’re done with it.

As they say around the Valley, the desert doesn’t hide much once the sun comes up. Same goes for a board once you know what you’re looking at.

What Are SMD Components, Really?

An SMD is a component that mounts flat onto a board’s surface. No holes drilled. No leads poked through.

SMD stands for surface mount device. The parts sit on copper pads. Solder paste holds them down. A reflow oven melts the paste and locks them in place.

Compare that to the old way. Through-hole parts had wire legs. Those legs went through drilled holes and got soldered on the back.

Through-hole worked fine. It was just slow, bulky, and expensive to build at scale.

The switch to surface-mount technology changed everything. Boards got smaller. Machines got faster. Phones got thin.

Why it matters to you: SMD parts pack more value into less weight. A single reel can hold ten thousand pieces.

Ever wonder why an old phone weighs less than a paperback? This is why.

Think of a through-hole board as a house with a full basement. Every part needs a foundation hole. An SMD board is more like a rooftop garden. Everything sits on top, tight and neat.

SMD vs SMT: The Mix-Up That Trips Everyone Up

SMT is the process. SMD is the part. That’s the whole difference.

Surface mount technology describes the assembly method. Solder paste, pick and place, reflow oven. Surface mount device describes the physical chip you hold.

People swap these terms constantly. Even buyers do it. Want the full breakdown? Our post on the difference between SMT and SMD covers both sides.

Getting this right matters when you request a quote. Saying “I have SMT” is vague. Saying “I have 400 reels of SMD passives” gets you a real number.

The Two Big Families: Passive and Active SMD Components

Every SMD part is either passive or active. That’s the first fork in the road.

Passive components don’t add energy to a circuit. They shape it, store it, slow it, or filter it. Resistors, capacitors, inductors.

Active components control current. They switch, amplify, or make decisions. Diodes, transistors, integrated circuits.

Here’s a simple way to hold it in your head. Passives are the plumbing. Actives are the valves and the brain.

Why does the split matter for scrap value? Because actives usually carry more precious metal. Gold bonding wire. Silver. Palladium.

Passives are smaller and cheaper per piece. But volume changes the math fast. Ten thousand capacitors on a reel add up.

An old Arizona line fits here. Don’t judge the well by the size of the bucket.

Passive SMD Components: The Quiet Workhorses

Passive SMD components handle the boring, critical jobs. They set current levels, smooth power, and block noise.

You’ll find far more passives than actives on most boards. A typical phone board runs hundreds of them.

They look almost identical to an untrained eye. Tiny black or brown rectangles. That’s where the confusion starts.

Let’s break the three main kinds apart.

SMD Resistors

An SMD resistor limits current and sets voltage levels. It’s the most common part on earth by count.

Most look like small dark rectangles with silver ends. The body is usually black or dark gray. The ends are the solder terminations.

How to read them:

Three-digit code: first two digits are the value, third is the number of zeros. So 472 means 4,700 ohms.
Four-digit code: first three are the value, fourth is the zeros. So 4701 also means 4,700 ohms.
“R” marks a decimal point. So 4R7 means 4.7 ohms.
A single “0” means a zero-ohm jumper. It’s a wire in disguise.

Common types include thick film, thin film, and metal foil. Thick film is cheapest and most common. Thin film costs more and holds tighter tolerance.

Current sense resistors are a separate breed. They’re low value, high power, and often larger. They usually sit near power circuits.

Scrap note: Plain resistors carry little intrinsic value. Full factory reels of known brands can still sell as surplus stock.

Is a bucket of loose resistors worth hauling in? Usually not on its own. Bundled with reels and ICs, it earns its ride.

SMD Capacitors

An SMD capacitor stores and releases electrical energy. It smooths power and blocks unwanted signals.

Most are multilayer ceramic chip capacitors. The trade calls them MLCCs. They look like tiny tan, beige, or light brown blocks.

Here’s the tell. Ceramic caps almost never have printed markings. That blank face is the clue.

The main capacitor types you’ll meet:

Ceramic (MLCC): Tan or beige body, no markings, huge volumes. Classes include C0G, X7R, X5R, and Y5V.
Tantalum: Usually yellow or orange, with a bar marking the positive end. Higher capacitance per size.
Aluminum electrolytic: Small silver cans on a black base. Polarized. They fail more often than the rest.
Polymer: Newer, lower resistance, often black or dark red cans.
Film: Larger, boxy, and used where stability matters most.

Tantalum caps deserve extra attention. Tantalum is a conflict-sensitive metal with real market value. Reels of tantalum caps often price better than ceramics.

Capacitors are the shock absorbers of a circuit. They soak up the bumps so the chips ride smooth.

Sitting on surplus stock? We buy SMD capacitors and SMD components by the reel or pallet.

SMD Inductors and Ferrite Beads

An SMD inductor stores energy in a magnetic field. It resists sudden changes in current.

You’ll spot them near power supply sections. They’re often bigger and squatter than nearby parts.

Common forms:

Wirewound chip inductors: Visible copper coil, sometimes glued in a ceramic body.
Multilayer inductors: Flat and small, look a lot like resistors.
Molded power inductors: Chunky, gray or black, used in DC-DC converters.
Ferrite beads: Small dark blocks that kill high-frequency noise.

Ferrite beads are not really inductors in practice. They act like frequency-dependent resistors. Engineers use them to clean up messy power rails.

Scrap note: Inductors contain copper windings. Larger power inductors carry more copper by weight.

Old-timers around here say a slow river still carves rock. Inductors work the same way. Quiet, steady, and hard to replace.

SMD Package Sizes and Case Codes Explained

SMD case codes describe the part’s footprint, not its value. The code is a size, plain and simple.

Two systems exist. Imperial codes use inches. Metric codes use millimeters. That’s where people get burned.

An imperial 0402 measures 0.04 by 0.02 inches. A metric 0402 measures 0.4 by 0.2 millimeters. Those are wildly different parts.

Common imperial case codes and their real sizes:

01005: 0.4 x 0.2 mm. Smaller than a grain of salt.
0201: 0.6 x 0.3 mm. Common in phones and wearables.
0402: 1.0 x 0.5 mm. The modern workhorse size.
0603: 1.6 x 0.8 mm. Very common in consumer boards.
0805: 2.0 x 1.25 mm. Popular with hobbyists and older designs.
1206: 3.2 x 1.6 mm. Easy to hand solder.
1210: 3.2 x 2.5 mm. Used for higher capacitance parts.
2010 and 2512: Larger power resistors and sense resistors.

Why size matters for your inventory:

Smaller parts mean higher piece counts per reel. Higher counts mean a bigger sell price for the same box weight.

A single 7-inch reel of 0402 parts can hold ten thousand pieces. A reel of 1206 parts holds far fewer.

Buyers price by part number and quantity, not by box size. So a light box can beat a heavy one.

Ever pick up a small box and find it worth more than the pallet beside it? That happens weekly in this business.

Size codes are like shoe sizes. They tell you the fit, not the quality of the shoe.

Active SMD Components: The Decision Makers

Active SMD components control the flow of current. They amplify, switch, rectify, and compute.

These parts carry the intelligence of a board. They also carry most of the recoverable metal value.

Let’s go through the main groups.

SMD Diodes

A diode lets current flow one direction and blocks the other. It’s a one-way gate.

SMD diodes come in small two-terminal or three-terminal packages. Look for a printed band or stripe. That band marks the cathode.

Types you’ll run into:

Rectifier diodes: Convert AC to DC in power sections.
Schottky diodes: Low forward voltage, fast switching, common in power circuits.
Zener diodes: Hold a fixed voltage, used for regulation and protection.
TVS diodes: Absorb voltage spikes and protect sensitive chips.
Signal and switching diodes: Small, fast, used in logic paths.
LEDs: Light-emitting diodes, everywhere in displays and indicators.

Common diode packages: SOD-323, SOD-123, SMA, SMB, SMC, and the older MELF style.

MELF parts are worth a mention. MELF means metal electrode leadless face. They’re cylindrical, which means they roll off boards and benches.

SMD LEDs deserve their own note. High-brightness LEDs in reels hold decent surplus value. Standard indicator LEDs usually don’t.

SMD Transistors

A transistor switches or amplifies current. It’s the building block of every digital circuit.

Most SMD transistors sit in small three-legged packages. SOT-23 is the classic. SOT-223 and DPAK handle more power.

The two main branches:

Bipolar junction transistors (BJTs): Current-controlled. Used for amplification and simple switching.
Field-effect transistors (FETs): Voltage-controlled. MOSFETs dominate modern power switching.

Power MOSFETs in DPAK, D2PAK, and PowerPAK cases are common on motor and power boards. They tend to be larger and heavier than signal transistors.

Scrap note: Power semiconductors in factory packaging often resell as usable stock. That beats scrap pricing every time.

These parts show up in motor drives, power supplies, and logic boards.

A transistor is the light switch of electronics. Small motion in, big result out.

SMD Integrated Circuits

An integrated circuit packs thousands or billions of transistors into one chip. It’s the brain of the board.

ICs are where the real value usually hides. Gold bonding wire. Silver. Copper lead frames. Sometimes palladium.

Broad IC categories:

Microprocessors and microcontrollers: Run the show. Highest value per piece.
Memory chips: DRAM, flash, EEPROM. Value swings with market demand.
Logic ICs: Gates, buffers, level shifters. Cheap individually, valuable in bulk.
Analog ICs: Op-amps, comparators, references.
Power management ICs: Regulators, converters, controllers.
RF and interface ICs: Radios, transceivers, drivers.

Chip identification takes practice. Marking codes are often abbreviated. Date codes and lot codes crowd the surface.

We buy and process IC chips from manufacturers, repair shops, and contract assemblers across Arizona.

SMD Crystals and Oscillators

A crystal sets the timing for a circuit. It’s the heartbeat of the board.

Crystals are passive and need a driver circuit. Oscillators are active and include their own driver.

You’ll see them as small silver or metal cans. Four-pad rectangles are common. They usually sit close to the main processor.

Related timing parts:

Crystal resonators: Two-terminal, low cost, need external circuitry.
Crystal oscillators (XO): Self-contained, four pads, clean output.
Temperature-compensated oscillators (TCXO): Hold accuracy across heat swings.
Real-time clock modules: Keep time when power is off.

Phoenix heat is a real factor here. Timing parts drift when they cook in a hot warehouse. TCXO parts handle it better.

Around here we joke that summer tests everything, including patience. Crystals are no exception.

SMD IC Package Types: SOIC, QFP, QFN, BGA and More

IC package type describes how the chip connects to the board. It’s not about what the chip does inside.

This matters for identification, for reuse, and for value sorting. Two chips with the same function can sit in very different packages.

The main package families:

SOT (Small Outline Transistor): Two to eight pins. SOT-23, SOT-89, SOT-223.
SOIC (Small Outline IC): Gull-wing leads on two sides. Eight to twenty-eight pins.
SSOP, TSSOP, MSOP: Shrink versions of SOIC with tighter pin spacing.
QFP (Quad Flat Package): Leads on all four sides. Common in microcontrollers.
TQFP and LQFP: Thin and low-profile QFP variants.
QFN (Quad Flat No-leads): No visible leads. Pads underneath the body.
DFN: Dual flat no-leads, a two-sided version of QFN.
BGA (Ball Grid Array): Solder balls in a grid under the chip. Highest pin counts.
PLCC (Plastic Leaded Chip Carrier): Older, J-shaped leads, often socketed.
LGA (Land Grid Array): Flat pads, no balls, used in processors and modules.
CSP (Chip Scale Package): Barely larger than the die itself.

A quick value hint: BGA and LGA parts often carry more gold and higher piece value. QFN and QFP land in the middle. SOT parts sit lowest.

Ceramic packages usually beat plastic ones for recovery value. Older military and aerospace parts often use ceramic with gold plating.

Package types are like envelopes. The letter inside decides the value. But the envelope tells you a lot at a glance.

Electromechanical and Specialty SMD Parts

Not every surface mount part is a resistor or a chip. A whole group of parts gets ignored in most guides.

These parts often carry more copper, gold, or silver than the tiny passives beside them.

Specialty SMD parts worth knowing:

Connectors: Board-to-board, board-to-wire, and card edge. Gold-plated contacts are common.
Switches and tactile buttons: Small mechanical parts with silver or gold contacts.
Relays: Small sealed units with real copper coils and precious metal contacts.
Fuses: Fast-blow and slow-blow chip fuses.
Varistors and thermistors: Protect against surges and track temperature.
Transformers and common-mode chokes: Copper-heavy magnetics.
Sensors: Accelerometers, temperature sensors, hall effect devices.
Shields and cans: Stamped metal covers over RF sections.
Sockets: Chip sockets, often gold-plated.

Connectors are the sleeper value here. Gold-plated connector pins add up fast in volume.

We list connectors with gold contacts among the items we actively buy. Many sellers throw them in a bin with plain hardware.

That’s like tossing the good silverware with the paper plates. It happens more than you’d think.

How to Identify SMD Components on a Board

You identify SMD components by shape, color, marking, and position. Those four clues cover most parts.

No single trick works alone. Put them together and the board starts to read like a map.

Step one: read the silkscreen reference designators.

The board’s printed labels tell you the part type. They follow a standard:

R = resistor
C = capacitor
L = inductor
D = diode
Q = transistor
U or IC = integrated circuit
Y or X = crystal or oscillator
F = fuse
J or P = connector
T = transformer
RV = varistor
SW = switch

Step two: look at color and finish.

Black rectangle with printed numbers is usually a resistor. Tan or beige with no markings is usually a ceramic capacitor. Yellow or orange with a stripe points to tantalum.

Step three: check the marking codes.

Resistors use numeric codes. Transistors and diodes use short alphanumeric codes. ICs carry part numbers, date codes, and lot codes.

Marking codes on tiny parts get abbreviated hard. A SOT-23 might just say “1AM”. Cross-reference tables exist for these.

Step four: use a multimeter.

A meter in diode mode confirms diode direction. Resistance mode confirms resistor values. Capacitance mode helps on larger caps.

Our quick guide shows how to identify SMD components step by step.

Is guessing good enough? Not when you’re pricing a pallet. Guessing costs money on both sides of a deal.

The old saying fits. Measure twice, cut once. Same idea, smaller parts.

How SMD Components Are Packaged, Stored, and Why It Matters

SMD components ship in tape and reel, trays, tubes, or bulk bags. The packaging affects value more than most people expect.

Machines need parts fed in a known orientation. Loose parts can’t be machine-placed. That single fact drives the whole pricing gap.

The four main packaging formats:

Tape and reel: Parts sit in pockets on carrier tape, sealed with cover tape. Standard for high volume.
Trays (JEDEC trays): Rigid plastic trays with pockets. Used for QFP, BGA, and large ICs.
Tubes (sticks): Long plastic tubes for SOIC and similar packages.
Bulk bags: Loose parts. Cheapest to ship, lowest resale value.

Why sealed matters: Factory-sealed, unopened reels command the strongest pricing. Original labels prove part number, quantity, and date code.

Then there’s moisture. Many plastic packages absorb humidity from the air. Heat them in a reflow oven and trapped moisture turns to steam.

That steam can crack the package from inside. The trade calls it popcorning. It ruins parts instantly.

The industry manages this with a moisture sensitivity level rating. Parts ship in dry bags with desiccant and a humidity indicator card.

Storage rules that protect value:

Keep parts between 5°C and 30°C where possible.
Hold humidity below 60 percent.
Don’t open moisture-barrier bags until you’re ready to use the parts.
Keep original labels and packing slips together.
Store reels flat or upright, never crushed.

Phoenix creates a specific problem here. A garage or metal shed can pass 140°F in July. Component finishes oxidize faster in that heat.

Solderability fades. Tin-lead finishes hold up better than lead-free ones. Our post on the shelf life of SMD components breaks down the timelines.

Bottom line: Storage is not a side detail. It’s the difference between resale stock and scrap metal.

Here’s the local truth. The desert preserves bones and punishes electronics.

Which SMD Components Actually Hold Value?

Value depends on part number, quantity, packaging, and demand. Not on weight and not on looks.

This is the part most guides skip. So let’s be direct about it.

Highest value, generally:

Factory-sealed reels of current production ICs
Microprocessors, memory, FPGAs, and power management chips
Tantalum capacitors in original packaging
Gold-plated connectors and sockets
Ceramic packaged ICs, especially older military grade
Complete tray lots of BGA and QFP parts
Test equipment modules and populated cards

Middle value:

Opened but complete reels with labels
Common logic and analog ICs in volume
Power MOSFETs and rectifier modules
Populated circuit boards with heavy IC counts
Copper-heavy inductors and transformers

Lowest value:

Loose, mixed, unlabeled parts in bins
Standard ceramic capacitors and thick film resistors in small counts
Damaged, corroded, or heat-stressed stock
Partial reels with no part number

Three things that change your number fast:

Documentation. A packing list and part numbers beat a guess every time.
Sorting. Separated by part number beats a mixed pallet.
Condition. Sealed and dry beats open and dusty.

Ever heard the line about a bird in the hand? In this business, it’s a labeled reel in the hand.

Two identical pallets can price hours apart in value. The difference is usually paperwork and sorting.

What Phoenix Businesses Do With Surplus SMD Components

Phoenix businesses sell, recycle, or liquidate surplus SMD stock. Landfilling it is the one option that’s off the table.

Arizona’s electronics sector keeps growing. Semiconductor fabs, contract assemblers, aerospace suppliers, medical device makers. All of them end up with excess.

Where surplus SMD stock comes from:

Engineering change orders that obsolete a part mid-run
Canceled or reduced production orders
Minimum order quantities that overshoot real demand
Line shutdowns and plant closures
End-of-life product transitions
Acquired inventory from a merger
Failed suppliers leaving stock behind

We work with companies across Maricopa County. Phoenix, Tempe, Chandler, Mesa, Gilbert, Glendale, Scottsdale, and Peoria.

What a real disposition looks like:

First, an inventory review. Part numbers, quantities, packaging condition, date codes.

Second, an evaluation. Some stock resells as usable components. Some heads to responsible material recovery.

Third, pickup and paperwork. Scheduled, documented, and handled by people who do this daily.

Jay Hoehl Inc. has run this play since 1980. Jay Hoehl founded the company. Jake Hoehl took over as CEO in 2016.

We hold a long-standing BBB membership with an A+ rating. That record didn’t come from cutting corners.

Learn more about our full range of electronics recycling and surplus services. Or just call (602) 272-4033.

Around the Valley, folks say a good neighbor shows up when they say they will. That’s the whole standard here.

Ready for a number on your surplus? Request a free evaluation. Send your part numbers and quantities. We’ll tell you what it’s worth, no pressure and no fee.

Call (602) 272-4033 or schedule a pickup online. Monday through Friday, 8:00 a.m. to 4:30 p.m.

Common Mistakes When Clearing Out SMD Inventory

The biggest mistake is treating labeled stock like scrap metal. It costs sellers real money every week.

Let’s go through the ones we see most.

Mistake 1: Dumping reels into a gaylord box.

Once parts leave their tape, they’re bulk. Bulk pricing is a fraction of reel pricing. That decision can’t be undone.

Mistake 2: Throwing away the paperwork.

Packing slips, labels, and certificates of conformance prove what you have. No proof means a lower offer.

Mistake 3: Storing surplus in an uncooled warehouse.

Phoenix heat cooks solderability. Six months in a hot bay can move stock from resale to recovery.

Mistake 4: Opening moisture-barrier bags to “check.”

Once the seal breaks, the floor life clock starts. Photograph the outside label instead.

Mistake 5: Mixing part numbers together.

Sorting after the fact costs labor. That labor comes out of your offer.

Mistake 6: Assuming small means worthless.

A shoebox of BGA trays can outvalue a pallet of chassis metal. Weight lies.

Mistake 7: Waiting too long.

Component demand shifts. Parts that were hot last year can go quiet. Sitting on stock is a bet with a clock on it.

Mistake 8: Using a hauler instead of a processor.

A hauler moves boxes. A processor evaluates, resells, and documents. Different jobs entirely.

Is any of this recoverable after the fact? Some of it. Not the tape and reel part.

As the saying goes, you can’t unring a bell. You also can’t un-dump a reel.

SMD Component Types: Quick Reference

Here’s the whole picture in one place.

Passive SMD components:

Resistors: thick film, thin film, metal foil, current sense, zero-ohm jumpers
Capacitors: ceramic MLCC, tantalum, aluminum electrolytic, polymer, film
Inductors: wirewound, multilayer, molded power, ferrite beads
Resistor networks and arrays

Active SMD components:

Diodes: rectifier, Schottky, Zener, TVS, signal, LED
Transistors: BJT, MOSFET, JFET, IGBT
Integrated circuits: microprocessors, microcontrollers, memory, logic, analog, power management, RF
Crystals and oscillators: resonators, XO, TCXO, real-time clocks

Electromechanical and specialty:

Connectors, sockets, headers
Switches and tactile buttons
Relays
Fuses, varistors, thermistors
Transformers and common-mode chokes
Sensors and modules
RF shields and cans

Package families:

Chip packages: 01005, 0201, 0402, 0603, 0805, 1206, 1210, 2010, 2512
Transistor packages: SOT-23, SOT-89, SOT-223, DPAK, D2PAK
IC packages: SOIC, SSOP, TSSOP, MSOP, QFP, TQFP, LQFP, QFN, DFN, BGA, LGA, PLCC, CSP
Diode packages: SOD-123, SOD-323, SMA, SMB, SMC, MELF

Frequently Asked Questions

What are the different types of SMD components?

SMD components split into passive, active, and electromechanical types. Passives include resistors, capacitors, and inductors. Actives include diodes, transistors, ICs, and oscillators. Electromechanical parts include connectors, switches, relays, and fuses.

What is the difference between SMD and SMT?

SMD is the component. SMT is the process used to mount it. One is a part you can hold. The other is a manufacturing method.

How do I identify an SMD component?

Start with the board’s reference designator letter. Then check shape, color, and printed marking code. Confirm with a multimeter when you need certainty.

What do the numbers on SMD resistors mean?

They encode resistance. A three-digit code gives two value digits plus zeros. A four-digit code gives three value digits plus zeros. An R marks a decimal point.

What does 0402 mean on an SMD part?

It’s a case size, not a value. Imperial 0402 measures 1.0 by 0.5 millimeters. Metric 0402 is a much smaller part at 0.4 by 0.2 millimeters.

Which SMD components are worth the most money?

Factory-sealed reels of current production ICs lead the list. Tantalum capacitors, gold-plated connectors, and ceramic packaged chips also price well.

Can SMD components be recycled?

Yes. Usable stock gets resold. The rest goes through material recovery for gold, silver, copper, and other metals. Nothing needs to reach a landfill.

How long do SMD components last in storage?

Tin-lead finishes often hold two to five years. Lead-free finishes usually run one to two years. Heat and humidity shorten both numbers.

Do you buy partial reels and mixed lots?

Yes. Sorted and labeled stock prices better, but we evaluate mixed lots too. Send a list and we’ll take a look.

Do you offer pickup in Phoenix?

Yes. We schedule pickups across Phoenix and Maricopa County. Our facility is at 3334 W McDowell Rd, Unit 17, Phoenix, AZ 85009. Visits are by appointment.

Turning Component Knowledge Into a Better Outcome

Knowing your SMD types changes how you handle them. That’s the real takeaway here.

You now know the two families. Passive and active. You know the third group most guides forget. Connectors, relays, switches, and sensors.

You know how to read a case code. You know why an imperial 0402 and a metric 0402 aren’t the same part.

You know why sealed reels beat loose bins. You know what Phoenix heat does to solderability.

Most of all, you know that value hides in the details. Part numbers. Packaging. Paperwork. Sorting.

Here’s the simple next step. Pull together your part numbers and quantities. Note what’s sealed and what’s open. Then get a real number.

Jay Hoehl Inc. has been doing this in Phoenix since 1980. Free evaluation. Scheduled pickup. Clear pricing and no surprises.

Call (602) 272-4033 or request your free evaluation online. Monday through Friday, 8:00 a.m. to 4:30 p.m.

Your surplus doesn’t get more valuable sitting in a hot warehouse. As they say out here, the sun doesn’t wait on anybody.

What Are the Different Types of SMD Components?