Discrete Components & Passives

Whether you're designing a new PCB, prototyping a circuit, or repairing existing electronics, having the right discrete components and passive parts on hand is essential. Our extensive selection covers everything from ultra-compact SMD resistors and multilayer ceramic capacitors (MLCCs) to power inductors, ferrite beads, tantalum capacitors, fuses, and beyond. Every component is sourced for reliability and precision, so you can trust your builds to perform consistently — from hobbyist bench projects all the way to professional production runs.

Why Choose Our Discrete Components & Passives?

Wide Value Range: From pico-farad capacitors to micro-henry inductors and ohm-to-megaohm resistors — we stock the values you actually need.
Bulk & Reel Quantities: Save time and money with large-count reels and multi-packs ideal for production and prototyping alike.
Tight Tolerances: Find components rated at 1% tolerance or better for precision analog and digital designs.
SMD & Through-Hole Options: Whether your design calls for surface-mount or DIP packages, we have you covered.
Trusted Brands & Standards: All components meet industry specifications for voltage, current, and temperature ratings.

Our Component Categories at a Glance

Capacitors

From 0201 and 0603 MLCCs to 0805 ceramic capacitors, electrolytic capacitors, and tantalum capacitors — we stock the full spectrum of capacitance values and voltage ratings for decoupling, filtering, and energy storage applications.

Resistors

Our resistor range includes SMD chip resistors, resistor arrays, metal film, carbon film, and high-wattage cement resistors in both through-hole and surface-mount packages — with tolerances as tight as 1%.

Inductors & Ferrite Beads

Find SMD power inductors and chip ferrite beads designed for EMI suppression, power conversion, and signal filtering across a wide range of frequencies and current ratings.

Fuses & Protection

Protect your circuits with our thermal cutoff fuses, glass fuse holders, and related protection components — available in both panel-mount and inline configurations.

Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: What is the difference between SMD and through-hole discrete components?

A: SMD (Surface-Mount Device) components are soldered directly onto the surface of a PCB, making them ideal for compact, high-density designs and automated assembly. Through-hole (DIP) components have wire leads that pass through holes in the PCB and are often preferred for prototyping, high-power applications, or situations where mechanical strength is important. We carry both SMD and through-hole resistors, capacitors, and other passive components to suit any design requirement.

Q: What does MLCC stand for, and why are multilayer ceramic capacitors so widely used?

A: MLCC stands for Multilayer Ceramic Capacitor. These capacitors are widely used because they offer excellent stability, low equivalent series resistance (ESR), and a wide range of capacitance values in a very small package. They are ideal for decoupling, bypassing, and filtering in virtually all electronic circuits. Our MLCC selection includes popular sizes like 0201, 0603, and 0805 in both X7R and other dielectric types.

Q: How do I choose the right resistor tolerance for my circuit?

A: Resistor tolerance indicates how much the actual resistance can deviate from the labeled value. For general-purpose digital circuits, 5% tolerance carbon film resistors are typically sufficient. For precision analog circuits, signal conditioning, or measurement applications, 1% metal film resistors are recommended. We offer resistors in both 1% and 5% tolerances across a wide range of wattages and package types.

Q: Are bulk reels of SMD components suitable for hand soldering?

A: Yes — while bulk reels are primarily designed for pick-and-place automated assembly, individual components can absolutely be hand-soldered, especially in larger packages like 0603 and 0805. Smaller packages such as 0201 require a steady hand and fine-tipped soldering equipment or a reflow oven. Bulk reels are a cost-effective choice for both prototyping and production when you need a large quantity of a specific value.

Q: What is a ferrite bead and when should I use one in my PCB design?

A: A ferrite bead is a passive component used to suppress high-frequency electromagnetic interference (EMI) on power and signal lines. It acts as a low-pass filter, passing DC and low-frequency signals while attenuating high-frequency noise. Ferrite beads are commonly placed on power supply lines close to ICs, on USB data lines, and on any trace that may be susceptible to or emitting high-frequency noise. Our 0805 chip ferrite beads are rated at 100MHz and available in current ratings from 2A to 6A.