Is there a pin-compatible replacement for FSMD010-0603-R?

No direct pin-compatible replacement with identical electrical parameters has been identified. Alternatives exist that are physically compatible (0603 package) but have a different trip current, making them functional alternates that require engineering validation.

What risks should I check before replacing FSMD010-0603-R?

The main risk is electrical. All suitable alternatives have a higher trip current (300mA vs. 250mA). You must verify that this reduced sensitivity to overcurrent events is safe and acceptable for your circuit's protection scheme.

FSMD010-0603-R Alternatives, Datasheet & Cross Reference | FUZETEC

Find functional alternatives for the FSMD010-0603-R, a 15V, 100mA PTC resettable fuse in an 0603 package. This guide helps you navigate key parametric differences like trip current to ensure a safe replacement.

AI replacement insight

Electrical riskmedium

Alternatives have a higher trip current (300mA vs 250mA), which may delay protection and allow higher transient currents.

Package risklow

All suitable alternatives use the same 0603 package, ensuring form and fit compatibility.

Can it be replaced directly?

No direct, pin-for-pin replacement with identical trip current was found. Several functional alternatives exist with a slightly higher trip current.

Best replacement path

Use a functional alternative like SMD0603P010TF, but verify the higher trip current (300mA vs 250mA) is acceptable.

Main risk

The primary risk is a change in overcurrent protection characteristics due to a higher trip current in all suitable alternatives.

Recommended alternatives

A functional alternative in the same 0603 package with matching voltage and hold current, but a higher trip current.

View details

Alternative comparison matrix

Feature / factor	FSMD010-0603-R	SMD0603-010	SMD0603-010C-33V	SMD0603P010TF	Compatibility / risk
Package	0603	0603	0603	0603	0603 — Package size matches.; SMD0603-010C-33V: Package size matches.; SMD0603P010TF: Package size matches.
Voltage	15V	15V	33V	15V	15V / 33V — Maximum voltage rating matches.; SMD0603-010C-33V: Higher voltage rating provides more design margin.; SMD0603P010TF: Maximum voltage rating matches.
Current	250mA	300mA	300mA	300mA	300mA — Trip current (It) is higher, fuse will trip at a higher current.; SMD0603-010C-33V: Trip current (It) is higher, fuse will trip at a higher current.; SMD0603P010TF: Trip current (It) is higher, fuse will trip at a higher current.

Application & sourcing insights

Questions & answers

Several functional alternatives like RUILON's SMD0603P010TF or TECHFUSE's SMD0603-010 are good candidates. They match the package, voltage, and hold current, but have a slightly higher trip current (300mA vs 250mA) that requires review.