Is there a pin-compatible replacement for SMD050F-2?

A direct pin-compatible replacement is not confirmed without datasheet cross-reference. While parts like 2016L050MR may share the same 2016 package, verification against the datasheet is essential to confirm an exact footprint match.

What risks should I check before replacing SMD050F-2?

Key risks include: 1) Current Rating: Ensure the hold and trip currents match your circuit's needs. 2) Package: Verify the physical dimensions and land pattern are identical. 3) Thermal Performance: Check power dissipation and operating temperature range.

SMD050F-2 Alternatives, Datasheet & Cross Reference | Littelfuse

Finding a substitute for the Littelfuse SMD050F-2 0.5A resettable PTC fuse requires matching its 60V rating, hold current, and SMD package. Alternatives exist but require careful review of electrical and physical parameters.

AI replacement insight

Electrical riskmedium

Hold/trip current and resistance must be closely matched to avoid circuit malfunction.

Package risklow

Most candidates are in standard SMD packages, but footprint verification is still necessary.

Sourcing risklow

PTC fuses are a common component type with multiple vendors.

Can it be replaced directly?

No confirmed direct pin-to-pin replacement for SMD050F-2 is available without datasheet verification. 2016L050MR is a strong functional candidate requiring engineering review to confirm its footprint and thermal behavior.

Best replacement path

The closest functional alternative is 2016L050MR, which has a similar hold current (0.55A) and voltage rating (60V). However, careful review of its package dimensions and power dissipation is required.

Main risk

The main risk is selecting a part with an incorrect current rating, leading to either nuisance tripping (if current is too low) or failure to protect the circuit (if too high).

Recommended alternatives

Strong functional match with similar hold current and voltage; requires review of package footprint and thermal characteristics.

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Alternative comparison matrix

Feature / factor	SMD050F-2	2016L050MR	SMD030F-2	Compatibility / risk
Application	PTC Resettable	PTC Resettable	PTC Resettable	PTC Resettable — Both are PTC resettable fuses.; SMD030F-2: Both are PTC resettable fuses.
Current	0.5A	0.55A	0.3A	0.55A / 0.3A — Hold current is very close to target's 0.5A.; SMD030F-2: Significantly lower hold current poses risk of nuisance tripping.
Voltage	60V	60V	60V	60V — Maximum voltage rating matches.; SMD030F-2: Maximum voltage rating matches.
Package	SMD (2016)	2016	-	2016 — Package size appears to match, but verify footprint from datasheet.
Power	1.7W	1.4W	-	1.4W — Lower power dissipation may affect thermal performance.
Temperature	Not specified	-	0°C to 60°C	0°C to 60°C — Much narrower operating temperature range.

Application & sourcing insights

Questions & answers

The Littelfuse 2016L050MR is a strong candidate, offering a 0.55A hold current and 60V rating. However, its package footprint and thermal characteristics must be verified for your application.