What risks should I check before replacing 2920L100PR?

Key risks include mismatched hold/trip currents, which affect the protection level, and different trip times, which can fail to protect downstream components or cause nuisance tripping. Always compare datasheets for resistance and time-to-trip curves before substitution.

2920L100PR Alternatives, Datasheet & Cross Reference | Littelfuse

Find pin-compatible and parametric alternatives for the Littelfuse 2920L100PR PTC resettable fuse. This guide helps you evaluate replacements based on key electrical and package specifications for your application.

AI replacement insight

Electrical riskmedium

Hold/trip current mismatch is the primary risk, altering circuit protection.

Package risklow

The 2920 package is highly standardized, ensuring form/fit compatibility.

Sourcing risklow

Many manufacturers produce similar PTC fuses, providing a robust supply chain.

Can it be replaced directly?

Direct replacement for 2920L100PR should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The best path is to use SMD2920P100TF, which matches all critical parameters. For applications that can tolerate higher current, other parametric alternatives exist.

Main risk

The main risk when substituting a PTC fuse is selecting an alternative with a higher hold current, which will not protect the circuit at the intended level.

Recommended alternatives

Strong alternative with matching package, voltage, and hold/trip current ratings.

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Alternative comparison matrix

Feature / factor	2920L100PR	SMD2920P100TF	SMD150L	Compatibility / risk
Package	2920	2920	2920	2920 — Form and fit match.; SMD150L: Form and fit match.
Voltage	33.0V	33.0V	33.0V	33.0V — Maximum voltage rating is identical.; SMD150L: Maximum voltage rating is identical.
Current	2.2A	2.2A	3.0A	2.2A / 3.0A — Trip current matches target.; SMD150L: Higher trip current allows more fault current.
Power	1.5W	1.5W	-	1.5W — Typical power dissipation matches.

Application & sourcing insights

Questions & answers

Verified drop-in options for 2920L100PR 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.