Is there a pin-compatible replacement for RS-03K4992FT?

Yes, AC0603FR-0749K9L from Yageo is a pin-compatible replacement with the same 49.9kΩ resistance, 1% tolerance, and 0603 package.

What risks should I check before replacing RS-03K4992FT?

Verify the substitute's resistance, tolerance, power rating, and temperature coefficient (TCR). For alternatives with different resistance values, confirm your circuit can tolerate the change.

RS-03K4992FT Alternatives, Datasheet & Cross Reference | Guangdong Fenghua Advanced Technology Holding Co., Ltd.

RS-03K4992FT is a common 49.9kΩ, 1%, 0.1W thick film resistor in a 0603 package. Several alternatives exist, including direct pin-compatible options and others that require review of resistance tolerance.

AI replacement insight

Electrical riskmedium

High if resistance is not matched; low for pin-compatible options.

Package risklow

All reviewed candidates use the same 0603 package.

Sourcing risklow

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

Can it be replaced directly?

Yes, Yageo's AC0603FR-0749K9L is a direct pin-to-pin replacement for RS-03K4992FT, matching resistance, tolerance, power, and package.

Best replacement path

The best path is Yageo's AC0603FR-0749K9L, which matches all key specifications and is AEC-Q200 qualified.

Main risk

The main risk when substituting is using a part with a different resistance value, which can alter circuit behavior.

Recommended alternatives

Yageo AC0603FR-0749K9L is a pin-compatible substitute with matching key electrical parameters and package.

View details

Alternative comparison matrix

Feature / factor	RS-03K4992FT	AC0603FR-0749K9L	ARG03BTC4702	RC0603FR-0752K3L	Compatibility / risk
Package	0603	0603	0603	0603	0603 — Identical package ensures form and fit compatibility.; ARG03BTC4702: Package matches, ensuring form and fit.; RC0603FR-0752K3L: Package matches, ensuring form and fit.
Resistance	49.9 kΩ	49.9 kΩ	47 kΩ	52.3 kΩ	49.9 kΩ / 47 kΩ / 52.3 kΩ — Resistance value is identical.; ARG03BTC4702: Resistance differs by ~5.8%. Circuit tolerance must be verified.; RC0603FR-0752K3L: Resistance differs by +4.8%. Circuit tolerance must be verified.
Tolerance	±1%	±1%	±0.1%	±1%	±1% / ±0.1% — Tolerance matches the target specification.; ARG03BTC4702: Tolerance is significantly tighter, a performance upgrade.; RC0603FR-0752K3L: Tolerance matches the target specification.
Power	0.1 W	0.1 W	-	0.1 W	0.1 W — Power rating is identical.; RC0603FR-0752K3L: Power rating is identical.
Tcr	±100ppm/℃	±100 ppm/°C	±25 ppm/°C	-	±100 ppm/°C / ±25 ppm/°C — Temperature coefficient matches the target.; ARG03BTC4702: TCR is much better, indicating higher stability over temperature.
Application	General Purpose	AEC-Q200	-	-	AEC-Q200 — Candidate is automotive qualified, an upgrade over the target.
Technology	Thick Film	-	Thin Film	-	Thin Film — Thin film technology offers lower noise and better stability than thick film.

Application & sourcing insights

Questions & answers

Yageo AC0603FR-0749K9L is an excellent alternative, matching all key specs and package size. It is also AEC-Q200 qualified, making it a robust choice.