Is there a pin-compatible replacement for PTFR0603B2K49N9?

While several 0603 resistors have the same package, a true pin-to-pin replacement requires matching all key electricals. Candidates like RT0603BRD072K49L have a weaker TCR, making them parametrically relaxed, not direct drop-in replacements.

What risks should I check before replacing PTFR0603B2K49N9?

Key risks include changes in temperature stability (TCR), power handling, and long-term reliability. The target has a ±10ppm/°C TCR; many alternatives are worse. Ensure the replacement's parameters meet your circuit's precision and environmental needs.

PTFR0603B2K49N9 Alternatives, Datasheet & Cross Reference | C&B RESI

PTFR0603B2K49N9 is a precision 2.49kΩ thin-film resistor in an 0603 package, featuring a tight ±0.1% tolerance and excellent temperature stability with a ±10ppm/°C TCR. It is AEC-Q200 qualified for demanding applications.

AI replacement insight

Electrical riskmedium

TCR mismatch can affect circuit accuracy over temperature.

Package risklow

0603 is a standard package with excellent availability.

Sourcing risklow

Many 0603 2.49kΩ resistors exist, but matching precision specs is key.

Can it be replaced directly?

No direct drop-in replacement has been identified that matches all key parameters, especially the low ±10ppm/°C TCR.

Best replacement path

Consider Yageo's RT series, like RT0603BRD072K49L, if a higher TCR of 25ppm/°C is acceptable for your application.

Main risk

The primary risk is performance degradation due to a higher Temperature Coefficient of Resistance (TCR) in most alternatives.

Recommended alternatives

A functional alternative with the same resistance and tolerance, but a higher temperature coefficient (TCR).

View details

Alternative comparison matrix

Feature / factor	PTFR0603B2K49N9	RT0603BRD072K49L	RT0603BRE072K49L	Compatibility / risk
Package	0603	0603	0603	0603 — Package size matches.; RT0603BRE072K49L: Package size matches.
Resistance	2.49 kΩ	2.49 kΩ	2.49 kΩ	2.49 kΩ — Resistance value matches.; RT0603BRE072K49L: Resistance value matches.
Tolerance	±0.1%	±0.1%	±0.1%	±0.1% — Tolerance matches.; RT0603BRE072K49L: Tolerance matches.
Tcr	±10 ppm/°C	25 ppm/°C	50 ppm/°C	25 ppm/°C / 50 ppm/°C — TCR is higher, indicating lower temperature stability.; RT0603BRE072K49L: TCR is significantly higher, indicating much lower stability.
Power	0.1 W	0.1 W	0.1 W	0.1 W — Same power rating. Does not meet internal 1.5x derating rule.; RT0603BRE072K49L: Same power rating. Does not meet internal 1.5x derating rule.

Application & sourcing insights

Questions & answers

The best alternative depends on application requirements. Yageo's RT0603BRD072K49L matches resistance and tolerance but has a higher TCR (25ppm/°C). Always verify parametric differences before substitution.