What risks should I check before replacing 2920L150DR?

When replacing the 2920L150DR, the main risk is using a part with a different hold current (Ihold), which could fail to protect your circuit. Also check the trip time, resistance profile, and maximum fault current (Imax) to ensure they meet your design's safety requirements.

2920L150DR Alternatives, Datasheet & Cross Reference | Littelfuse

Find the best alternatives for the Littelfuse 2920L150DR, a 1.5A/33V PTC resettable fuse in a 2920 package. This guide provides verified substitutes and analyzes key parametric differences to ensure circuit protection.

AI replacement insight

Electrical riskhigh

Mismatch in hold current can lead to circuit failure. This is the primary risk.

Package risklow

All candidates use the same standard 2920 package, minimizing physical compatibility issues.

Can it be replaced directly?

Direct replacement for 2920L150DR should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

TECHFUSE SMD150L is a direct parametric match and potential pin-to-pin replacement.

Main risk

Using an alternative with a higher hold current (e.g., 1.85A or 2.0A) will reduce overcurrent protection and may damage the circuit.

Recommended alternatives

Excellent alternative with matching key electricals and a higher fault current rating.

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Alternative comparison matrix

Feature / factor	2920L150DR	SMD150L	SMD185L	SMD2920P185TF	Compatibility / risk
Hold Current	1.5A	1.5A	1.85A	1.85A	1.5A / 1.85A — Hold current matches target, ensuring same protection level.; SMD185L: Higher hold current provides less protection. Must be verified.; SMD2920P185TF: Higher hold current provides less protection. Must be verified.
Voltage	33V	33V	33V	33V	33V — Maximum voltage rating matches.; SMD185L: Maximum voltage rating matches.; SMD2920P185TF: Maximum voltage rating matches.
Package	2920	2920	2920	2920	2920 — Package size matches for physical compatibility.; SMD185L: Package size matches.; SMD2920P185TF: Package size matches.
Max Fault Current	40A	100A	100A	40A	100A / 40A — Higher max fault current offers increased robustness.; SMD185L: Higher max fault current offers increased robustness.; SMD2920P185TF: Max fault current matches target.
Trip Current	3.0A	3.0A	-	-	3.0A — Trip current matches target.

Application & sourcing insights

Questions & answers

Verified drop-in options for 2920L150DR 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.