Is there a pin-compatible replacement for FRC0805F4R99TS?

Several 0805 package resistors are pin-compatible in form, but no direct pin-to-pin functional equivalent was found. Candidates like `AC0805FR-074R7L` fit the footprint but have different key electrical parameters.

What risks should I check before replacing FRC0805F4R99TS?

When replacing FRC0805F4R99TS, check for three main risks: 1) Resistance Mismatch: Ensure the new value is acceptable. 2) Tolerance Downgrade: Using a 5% part instead of 1% can affect circuit precision. 3) TCR Mismatch: A higher TCR can cause resistance to drift more with temperature.

FRC0805F4R99TS Alternatives, Datasheet & Cross Reference | FOJAN

FRC0805F4R99TS is a 4.99Ω ±1% 0.125W thick film resistor in an 0805 package. Finding a direct replacement requires matching resistance, tolerance, and TCR, while alternatives may offer different power ratings or qualifications.

AI replacement insight

Electrical riskhigh

Candidates have different resistance, tolerance, or TCR.

Package risklow

All candidates share the same 0805 package.

Can it be replaced directly?

No direct, drop-in replacement was identified. All candidates require a review of parametric trade-offs, particularly resistance value, tolerance, and TCR.

Best replacement path

Parametric alternatives with significant trade-offs.

Main risk

The primary risk is a loss of circuit precision due to mismatches in resistance value, tolerance (e.g., 1% vs 5%), or temperature coefficient (TCR).

Recommended alternatives

A parametric alternative in the same package and tolerance, but with a different resistance value (4.7Ω).

View details

Alternative comparison matrix

Feature / factor	FRC0805F4R99TS	AC0805FR-074R7L	AS05W2J051JT5E	Compatibility / risk
Package	0805	0805	0805	0805 — Same EIA package size.; AS05W2J051JT5E: Same EIA package size.
Resistance	4.99Ω	4.7Ω	5.1Ω	4.7Ω / 5.1Ω — Different standard value, ~6% lower.; AS05W2J051JT5E: Close value, within 2.2% of target.
Tolerance	±1%	±1%	±5%	±1% / ±5% — Precision matches target.; AS05W2J051JT5E: Significant downgrade from target's precision.
Power	0.125W	1.0W	0.5W	1.0W / 0.5W — Significant upgrade, but data is conflicting in sources and requires verification.; AS05W2J051JT5E: 4x power rating upgrade.
Tcr	±100 ppm/°C	±200ppm/°C (est.)	-	±200ppm/°C (est.) — Likely worse than target, requires datasheet check.
Application	General purpose	-	Anti-surge	Anti-surge — Special feature may affect performance.

Application & sourcing insights

Questions & answers

The best alternative depends on application flexibility. `AS05W2J051JT5E` offers higher power (0.5W) but a worse tolerance (±5%). `AC0805FR-074R7L` has the same tolerance but a different resistance (4.7Ω). Both require careful engineering review.