Is there a pin-compatible replacement for RK73H1ETTP5101F?

Yes, the Panasonic ERJ2RKF5101X is a pin-compatible replacement. It shares the same 0402 package, pinout, and key electrical characteristics, making it a strong candidate for direct substitution.

What risks should I check before replacing RK73H1ETTP5101F?

When replacing, primarily verify the power rating, resistance tolerance, and temperature coefficient (TCR). Many alternatives have a lower power rating (0.0625W vs 0.1W), which poses a reliability risk. Also check for AEC-Q200 qualification if used in automotive circuits.

RK73H1ETTP5101F Alternatives, Datasheet & Cross Reference | KOA Speer Electronics, Inc.

The KOA Speer RK73H1ETTP5101F is a popular AEC-Q200 qualified 0402 thick film resistor with 5.1kΩ resistance, ±1% tolerance, and a 0.1W power rating, widely used in automotive applications.

AI replacement insight

Electrical riskmedium

Many alternatives have lower power ratings, posing a reliability risk if not verified.

Package risklow

The 0402 package is highly standardized, ensuring mechanical compatibility.

Sourcing risklow

5.1kΩ 0402 resistors are a common value available from multiple manufacturers.

Can it be replaced directly?

Yes, the Panasonic ERJ2RKF5101X is a strong direct replacement for the KOA Speer RK73H1ETTP5101F.

Best replacement path

The Panasonic ERJ2RKF5101X offers a direct, pin-to-pin replacement with matching key specifications including AEC-Q200.

Main risk

The main risk is selecting an alternative with a lower power rating, as many common 0402 5.1kΩ resistors are rated for 0.0625W, not 0.1W.

Recommended alternatives

Excellent pin-to-pin match with identical package, power, resistance, tolerance, and AEC-Q200 qualification.

View details

Alternative comparison matrix

Feature / factor	RK73H1ETTP5101F	ERJ2RKF5101X	RMC04025.1K1%N	AR02BTC5101	Compatibility / risk
Package	0402 (1005 Metric)	0402	-	-	0402 — Package size matches.
Power	0.1W	0.1W	0.0625W	0.0625W	0.1W / 0.0625W — Power rating matches.; RMC04025.1K1%N: Candidate has a lower power rating.; AR02BTC5101: Candidate has a lower power rating.
Resistance	5.1kΩ	5.1kΩ	5.1kΩ	-	5.1kΩ — Resistance value matches.; RMC04025.1K1%N: Resistance value matches.
Tolerance	±1%	±1%	±1%	±0.1%	±1% / ±0.1% — Resistance tolerance matches.; RMC04025.1K1%N: Resistance tolerance matches.; AR02BTC5101: Candidate has tighter tolerance.
Tcr	±100 ppm/°C	±100 ppm/°C	-	±25ppm/°C	±100 ppm/°C / ±25ppm/°C — Temperature coefficient matches.; AR02BTC5101: Candidate has a better temperature coefficient.
Application	AEC-Q200	AEC-Q200	-	-	AEC-Q200 — Both parts are AEC-Q200 qualified.
Technology	Thick Film	-	Thick Film	Thin Film	Thick Film / Thin Film — Technology matches.; AR02BTC5101: Technology differs, may affect pulse handling.

Application & sourcing insights

Questions & answers

The Panasonic ERJ2RKF5101X is an excellent alternative, matching the 5.1kΩ resistance, ±1% tolerance, 0.1W power rating, 0402 package, and AEC-Q200 qualification.