RXE017 Equivalent & Substitute Parts

Part Overview

The RXE017 is a polymeric PTC resettable fuse manufactured by Littelfuse, rated for 60V maximum voltage with a 170 mA hold current. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement.

PTC resettable fuses function as automatic circuit protection devices that increase in resistance when exposed to overcurrent conditions, then return to normal operation once the fault is cleared. The RXE017 serves this protective function in through-hole radial disc configurations.

Substiute Parts

RXE017

LittelfuseIn Stock: 1036RXE017 Datasheet

Current PartRFQ

RXEF017

LittelfuseIn Stock: 21393RXEF017 Datasheet

DirectRFQ

60R017XU

LittelfuseIn Stock: 128760R017XU Datasheet

MFR RecommendedRFQ

RXEF017-0.142

Littelfuse Inc.In Stock: 1146RXEF017-0.142 Datasheet

Parametric EquivalentRFQ

MF-R017

Bourns Inc.In Stock: 3465MF-R017 Datasheet

DirectRFQ

PFRA.017

SCHURTER Inc.In Stock: 1096PFRA.017 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RXE017 is determined by strict equivalence across the following critical parameters:

• Voltage rating: 60V maximum
• Hold current: 170 mA
• Trip current: 340 mA
• Mounting configuration: Through hole radial disc
• Physical dimensions: 0.291" diameter, lead spacing 0.199" (5.05mm)
• Resistance characteristics: Initial resistance minimum 3.3 Ohms, post-trip maximum 8 Ohms

Parts meeting these specifications are classified as direct equivalents regardless of manufacturer. Minor variations in thickness (0.118" to 0.122") and lead spacing (0.199" to 0.201") remain within acceptable mechanical tolerances for standard through-hole PCB applications.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete RXE017, the following selection criteria apply:

Primary Recommendation: RXEF017 or RXEF017-0.142 (Littelfuse). Both parts maintain identical electrical specifications and physical dimensions to the RXE017 while offering active product status and ROHS3 compliance. These represent direct form-fit-function replacements with no design modification required.

Alternative Selections: 60R017XU (Littelfuse), MF-R017 (Bourns), and PFRA.017 (SCHURTER) are electrically equivalent with minor dimensional variations within standard PCB tolerance ranges. All three are active products with ROHS3 compliance. Selection among these alternatives depends on packaging availability and procurement lead times.

Compliance Consideration: The RXE017 is RoHS non-compliant. All recommended substitutes are ROHS3 compliant, meeting current regulatory requirements for new designs and production runs.

Frequently Asked Questions (FAQ)

Q: Can RXEF017 directly replace RXE017 without PCB modification?

A: Yes. RXEF017 maintains identical electrical ratings (60V, 170 mA hold current, 340 mA trip current) and physical dimensions (0.291" diameter, 0.199" lead spacing) as the RXE017. No design changes are required.

Q: What is the difference between RXEF017 and 60R017XU?

A: Both are Littelfuse products with identical electrical specifications. 60R017XU has slightly larger dimensions (0.122" thickness vs. 0.118", 0.201" lead spacing vs. 0.199"). These variations fall within standard through-hole PCB tolerances and do not affect functional compatibility.

Q: Are MF-R017 and PFRA.017 suitable replacements?

A: Yes. Both parts meet all critical electrical parameters (60V, 170 mA hold, 340 mA trip) and physical mounting requirements. MF-R017 (Bourns) and PFRA.017 (SCHURTER) have initial resistance of 2 Ohms minimum versus 3.3 Ohms for the RXE017, which represents a lower resistance state and is acceptable for this application category.

Q: Does packaging format affect electrical performance?

A: No. Packaging differences (Bag, Bulk, or unspecified) do not alter electrical characteristics. Selection should be based on procurement quantity requirements and inventory management practices.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitutes carry ROHS3 compliance certification, whereas the original RXE017 is RoHS non-compliant. This compliance upgrade is mandatory for new production and design implementations.