Is there a pin-compatible replacement for RS-03K4022FT?

Yes, several 0603 package resistors are available. ERA3AEB4022V is a strong candidate with identical resistance and a matching package. Other options have slightly different resistance values that require engineering review.

What risks should I check before replacing RS-03K4022FT?

Key risks include differences in resistance value, which can affect circuit performance, and technology (Thick vs. Thin Film), which can impact pulse withstanding capability and long-term stability. Always verify the substitute in your specific application.

RS-03K4022FT Alternatives, Datasheet & Cross Reference | Guangdong Fenghua Advanced Technology Holding Co., Ltd.

RS-03K4022FT is a general-purpose 40.2kΩ, 1%, 0.1W thick film resistor in a 0603 package. Several alternatives are available, including performance upgrades and parametric options that require engineering review.

AI replacement insight

Electrical riskmedium

Candidates may have different resistance values or technology (Thin vs. Thick Film).

Package risklow

All candidates are in the same 0603 package, ensuring physical compatibility.

Sourcing risklow

This is a common resistor value and package with many available manufacturers.

Can it be replaced directly?

No exact direct replacement is listed, but ERA3AEB4022V is a strong candidate that matches resistance and package, while offering upgraded performance.

Best replacement path

Upgrade to a precision Thin Film part like ERA3AEB4022V for better stability, or select a Thick Film part with a nearby resistance value if cost is a factor.

Main risk

The primary risk is substituting a resistor with a different nominal resistance value, which can alter the circuit's behavior, especially in precision applications.

Recommended alternatives

A 40.2kΩ 0603 resistor with superior tolerance (±0.1%) and TCR (±25ppm/°C).

View details

Alternative comparison matrix

Feature / factor	RS-03K4022FT	ERA3AEB4022V	AT0603BRD0740KL	RS-03K3902FT	Compatibility / risk
Package	0603	0603 (1608 Metric)	0603 (1608 Metric)	0603	0603 (1608 Metric) — Form factor matches.; AT0603BRD0740KL: Form factor matches.; RS-03K3902FT: Form factor matches.
Resistance	40.2kΩ	40.2kΩ	40.0kΩ	39.0kΩ	40.2kΩ / 40.0kΩ / 39.0kΩ — Resistance value is identical.; AT0603BRD0740KL: Resistance differs by -0.5%, within target's tolerance.; RS-03K3902FT: Resistance is 3% lower than target.
Tolerance	±1.0%	±0.1%	±0.1%	±1.0%	±0.1% / ±1.0% — Tighter tolerance provides higher precision.; AT0603BRD0740KL: Tighter tolerance provides higher precision.; RS-03K3902FT: Tolerance matches.
Tcr	±100ppm/℃	±25 ppm/°C	-	-	±25 ppm/°C — Lower TCR improves stability over temperature.
Technology	Thick Film	Thin Film	Thin Film	Thick Film	Thin Film / Thick Film — Different technology may affect pulse handling.; AT0603BRD0740KL: Different technology may affect pulse handling.; RS-03K3902FT: Technology matches.

Application & sourcing insights

Questions & answers

ERA3AEB4022V by Panasonic is an excellent upgrade, offering the same 40.2kΩ resistance and 0603 package with much better tolerance (±0.1%) and TCR. However, it uses Thin Film technology, which should be verified for the application.