Resistor Chip

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Chip resistors (SMD resistors) are surface-mount fixed resistors — the most basic passive component, used for current limiting, voltage division, and pull-up/down in nearly every circuit.

Selection guide

Match resistance and tolerance (±1%, ±5%) to your circuit's precision.
Ensure the power rating (varies by case: 0402/0603/0805) exceeds actual dissipation.
Check temperature coefficient (TCR) and rated voltage; low TCR matters for precision measurement.
Confirm the case size fits your footprint; use dedicated series for high voltage/power.

Frequently asked questions

How do I choose the chip resistor case size?

By power rating and board space. Typically 0402 ≈ 1/16W, 0603 ≈ 1/10W, 0805 ≈ 1/8W; leave power margin to reduce heating and drift.

Can I mix ±1% and ±5% resistors?

±5% is fine for non-precision uses like current limiting or pull-ups, but voltage dividers, references, and gain-setting should use ±1% or tighter.

Are resistors interchangeable if value and size match?

Yes if tolerance, power rating, and TCR are equal or better. PartsPlan compares case size together with electrical specs to suggest compatible parts.