What risks should I check before replacing WR04X4992FTL?

The primary risk is the resistance difference. The target is 49.9kΩ, while alternatives range from 47kΩ to 51kΩ. You must verify if your circuit can tolerate this change. Also check for any special characteristics like pulse withstanding if needed.

WR04X4992FTL Alternatives, Datasheet & Cross Reference | Walsin Technology Corporation

Find alternatives for the Walsin WR04X4992FTL, a 49.9kΩ 1% 1/16W 0402 thick film resistor. This page lists potential substitutes with similar form, fit, and function, noting key parametric differences for engineering review.

AI replacement insight

Electrical risklow

Resistance deviation is the primary concern. Closest options are within 2.2%, which is often acceptable.

Package risklow

All suggested alternatives are in the same 0402 package, ensuring physical compatibility.

Sourcing risklow

Alternatives from major manufacturers like Yageo and Walsin are widely available.

Can it be replaced directly?

Direct replacement for WR04X4992FTL should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Yageo's AC/AF series (e.g., AC0402FR-0751KL) offer the closest resistance (51kΩ) and are automotive grade, representing a potential upgrade.

Main risk

The main risk is the deviation in resistance value, which could affect circuit performance in sensitive applications.

Recommended alternatives

AEC-Q200 qualified resistor with similar parameters but slightly higher resistance (51kΩ).

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Alternative comparison matrix

Feature / factor	WR04X4992FTL	AC0402FR-0751KL	AF0402FR-0751KL	WR04X4702FTL	Compatibility / risk
Resistance	49.9 kΩ	51 kΩ	51 kΩ	47 kΩ	51 kΩ / 47 kΩ — 2.2% higher. Verify circuit tolerance.; AF0402FR-0751KL: 2.2% higher. Verify circuit tolerance.; WR04X4702FTL: 5.8% lower. Verify circuit tolerance.
Package	0402 (1005 Metric)	0402	0402	0402 (1005 metric)	0402 / 0402 (1005 metric) — Same 0402 (1005 metric) package.; AF0402FR-0751KL: Same 0402 (1005 metric) package.; WR04X4702FTL: Same 0402 package.
Power	1/16 W	1/16 W	1/16 W	1/16 W	1/16 W — matched; AF0402FR-0751KL: matched; WR04X4702FTL: matched
Tolerance	±1%	±1%	±1%	±1%	±1% — matched; AF0402FR-0751KL: matched; WR04X4702FTL: matched
Application	General Purpose	AEC-Q200	AEC-Q200, Anti-Sulfur	-	AEC-Q200 / AEC-Q200, Anti-Sulfur — Candidate is automotive grade, an upgrade.; AF0402FR-0751KL: Candidate is automotive grade, an upgrade.

Application & sourcing insights

Questions & answers

Verified drop-in options for WR04X4992FTL are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.