RXEF017-AP Equivalent & Substitute Parts

Part Overview

The RXEF017-AP is a polymeric PTC resettable fuse manufactured by Littelfuse, designed for circuit protection in applications requiring automatic reset functionality. This component operates at 60V maximum voltage with a 170 mA hold current and 340 mA trip current. The part is currently active in production with full inventory availability. Equivalent parts are identified when identical electrical performance and mechanical compatibility are maintained across the specified parameter range.

Substiute Parts

RXEF017-AP

LittelfuseIn Stock: 1385RXEF017-AP Datasheet

Current PartRFQ

60R017XPR

Littelfuse Inc.In Stock: 305760R017XPR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 60R017XPR qualifies as a direct substitute for the RXEF017-AP based on matching electrical specifications across all critical protection parameters. Both components share identical voltage rating (60V), hold current (170 mA), trip current (340 mA), maximum current (40 A), trip time (3 s), initial resistance (3.3 Ohms minimum), and post-trip resistance (8 Ohms maximum). Operating temperature range, mounting type (Through Hole), and package configuration (Radial, Disc) are identical. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Lead spacing measurements are within acceptable tolerance (0.199" vs 0.201"), and physical dimensions remain compatible for PCB layout requirements. The substitution is valid based on these matching electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

Both RXEF017-AP and 60R017XPR are active production components from Littelfuse with full regulatory compliance. Selection between these parts should be based on inventory availability and lead time requirements. The RXEF017-AP (PolySwitch® RXEF series) carries approvals from CQC, CSA, TUV, and UL. The 60R017XPR (POLY-FUSE® 60R series) carries cURus approval. Both parts meet ROHS3 compliance and REACH unaffected status. For applications requiring specific agency certifications, verify that the selected part's approval list matches your system requirements. Lead spacing tolerance of 0.002" (0.05mm) between parts is within standard PCB design tolerances for radial through-hole components.

Frequently Asked Questions (FAQ)

Q: Can 60R017XPR be used as a direct replacement for RXEF017-AP in existing designs?

A: Yes. Both parts share identical electrical specifications (60V, 170 mA hold, 340 mA trip) and mechanical compatibility (Through Hole, Radial Disc package). Lead spacing differs by 0.002" (0.05mm), which is within standard PCB tolerance for radial components.

Q: What are the critical parameters that define substitution eligibility?

A: Voltage rating (60V), hold current (170 mA), trip current (340 mA), initial resistance (3.3 Ohms minimum), post-trip resistance (8 Ohms maximum), operating temperature range (-40°C to 85°C), and mounting configuration (Through Hole Radial Disc) must match exactly.

Q: Are there differences in regulatory approvals between these parts?

A: Yes. RXEF017-AP carries CQC, CSA, TUV, and UL approvals. 60R017XPR carries cURus approval. Verify that your application requirements align with the selected part's certification list.

Q: Do these parts have different thermal or environmental performance?

A: No. Both parts operate across the identical temperature range (-40°C to 85°C) and maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the physical dimension difference between these parts?

A: Thickness differs by 0.004" (0.10mm): RXEF017-AP is 0.118" T versus 60R017XPR at 0.122" T. Lead spacing differs by 0.002" (0.05mm). These differences are within standard PCB design tolerances for radial through-hole components.