Is there a pin-compatible replacement for 25121WF5100T4E?

Yes, several parts like HP122WJ0511T4E share the same 2512 package and are pin-compatible. However, they are not electrically identical due to a difference in resistance tolerance, which must be reviewed.

What risks should I check before replacing 25121WF5100T4E?

The main risk is the wider resistance tolerance of ±5% in the alternatives, versus ±1% in the original. This could affect the accuracy and performance of your circuit if it relies on high precision.

25121WF5100T4E Alternatives, Datasheet & Cross Reference | UNI-ROYAL

Find and compare alternatives for the UNI-ROYAL 25121WF5100T4E, a 510Ω 1W 1% 2512 chip resistor. Review parametric differences like tolerance before substitution.

AI replacement insight

Electrical riskmedium

Tolerance difference from ±1% to ±5% requires circuit analysis.

Package risklow

All suggested alternatives use the same 2512 package.

Can it be replaced directly?

No direct 1:1 replacements with identical parameters were found. Several alternatives match the 510Ω resistance, 1W power, and 2512 package, but have a wider tolerance of ±5% instead of ±1%.

Best replacement path

parametric_relaxed

Main risk

The primary risk is the relaxed resistance tolerance from ±1% to ±5%, which may not be suitable for precision applications.

Recommended alternatives

A 510Ω, 1W resistor in a 2512 package with a wider ±5% tolerance. Same manufacturer.

View details

Alternative comparison matrix

Feature / factor	25121WF5100T4E	25121WJ0511T4E	FRC2512J511 TS	HP122WJ0511T4E	Compatibility / risk
Package	2512	2512	2512	2512 (6432 metric)	2512 / 2512 (6432 metric) — Form factor matches.; FRC2512J511 TS: Form factor matches.; HP122WJ0511T4E: Form factor matches.
Resistance	510Ω	510Ω	510Ω	510Ω	510Ω — Resistance value matches.; FRC2512J511 TS: Resistance value matches.; HP122WJ0511T4E: Resistance value matches.
Tolerance	±1%	±5%	±5%	±5%	±5% — Wider tolerance may impact precision.; FRC2512J511 TS: Wider tolerance may impact precision.; HP122WJ0511T4E: Wider tolerance may impact precision.
Power	1W	1W	1W	2W	1W / 2W — Power rating matches.; FRC2512J511 TS: Power rating matches.; HP122WJ0511T4E: Higher power rating is generally safe.
Tcr	Unknown	-	±100 ppm/°C	-	±100 ppm/°C — TCR is specified, target is unknown.

Application & sourcing insights

Questions & answers

The best alternatives are parametric matches like HP122WJ0511T4E or FRC2512J511 TS. They match resistance, power, and package, but have a wider ±5% tolerance compared to the original's ±1%.