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Best Alternatives to RXEF050-2

Package: Radial, DiscLittelfusePTC Resettable FusesSeries: PolySwitch®, RXEFPackage: Tape & Reel (TR) Cut Tape (CT)Type: PolymericVoltage - Max: 72VCurrent - Hold (Ih) (Max): 500 mA

Find datasheet-verified substitutes for the Littelfuse RXEF050-2, a 72V 0.5A radial leaded PTC resettable fuse. Review pin-compatible and functional alternatives, noting differences in performance.

AI replacement insight

Electrical risklow

Risk is low if hold/trip currents and voltage are matched.

Package risklow

Radial leaded is a common package, but lead spacing must be verified.

Sourcing risklow

Multiple vendors produce similar parts, but qualification is needed.

Can it be replaced directly?

Direct replacement for RXEF050-2 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Use the base part RXEF050 for the most direct replacement, or the A72-050 as a strong cross-vendor alternative after datasheet review.

Main risk

The main risk is selecting a part with an incorrect hold current, which would fail to protect the downstream circuit as intended.

Recommended alternatives

2
RXEF050 package
RXEF050

Littelfuse

Needs validationlow risk

Likely a direct replacement from the same manufacturer, differing only in packaging. All key electrical parameters match.

View details

Alternative comparison matrix

Feature / factorRXEF050-2RXEF050A72-050Alt 3Compatibility / risk
CodeRXEF050-2RXEF050-RXEF050 — Base part number matches, suffix differs. Likely a packaging variant.
Voltage72V72V72V72V — Maximum voltage rating is identical.; A72-050: Maximum voltage rating is identical.
Current0.5A0.5A0.5A0.5A — Hold current is identical.; A72-050: Hold current is identical.
Trip Current1.0A1.0A1.0A1.0A — Trip current is identical.; A72-050: Trip current is identical.
PackageRadial LeadedRadial LeadedRadial LeadedRadial Leaded — Package style is identical.; A72-050: Package style is the same, but dimensions require verification.
Power1.29W-0.8W0.8W — Power dissipation is within an acceptable range.

Application & sourcing insights

Questions & answers

Verified drop-in options for RXEF050-2 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.