What risks should I check before replacing FCC0402B681K500AT?

When substituting, verify the package dimensions, voltage rating, and capacitance. Also, check secondary parameters like temperature characteristics (e.g., X7R vs. C0G) and ESR, as these can affect circuit performance.

FCC0402B681K500AT Alternatives, Datasheet & Cross Reference | FOJAN

Find replacements for the FCC0402B681K500AT, a 680pF 50V 0402 X7R ceramic capacitor. This page lists pin-compatible alternatives and potential upgrades for your design.

AI replacement insight

Electrical risklow

Low if capacitance, voltage, and dielectric are matched.

Package risklow

The 0402 package is standardized, ensuring physical compatibility.

Can it be replaced directly?

Direct replacement for FCC0402B681K500AT should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Direct replacement with another X7R capacitor like CCTC's TCC0402X7R681K500AT.

Main risk

The main risk is substituting with a part that has a different capacitance value or a less stable dielectric without engineering review.

Recommended alternatives

A strong pin-to-pin alternative with identical key electrical and physical specifications.

View details

Alternative comparison matrix

Feature / factor	FCC0402B681K500AT	TCC0402X7R681K500AT	GCM1555C1H681JA16D	Compatibility / risk
Package	0402 (1005 Metric)	0402 (1005 metric)	0402 (1005M)	0402 (1005 metric) / 0402 (1005M) — Identical package ensures physical compatibility.; GCM1555C1H681JA16D: Identical package ensures physical compatibility.
Capacitance	680 pF	680 pF	-	680 pF — Capacitance value is identical.
Voltage	50 V	50 V	50 V	50 V — Voltage rating is identical.; GCM1555C1H681JA16D: Voltage rating is identical.
Tolerance	±10%	±10%	±5%	±10% / ±5% — Tolerance is identical.; GCM1555C1H681JA16D: Tighter tolerance is a performance upgrade.
Dielectric	X7R	X7R	C0G (EIA)	X7R / C0G (EIA) — Dielectric material is identical.; GCM1555C1H681JA16D: C0G is more stable than X7R, an upgrade.
Application	General Purpose	-	AEC-Q200	AEC-Q200 — Automotive qualification is an upgrade.

Application & sourcing insights

Questions & answers

Verified drop-in options for FCC0402B681K500AT 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.