Littelfuse 0257002.U Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0257002.U is a 2A 32VDC automotive blade fuse designed for ATO/ATC holder applications. This part is classified as obsolete, making identification of active equivalent components essential for ongoing system support and component procurement. The substitute part maintains identical electrical and mechanical specifications while offering improved availability through active product status.

Substiute Parts

0257002.U

Littelfuse Inc.In Stock: 8460257002.U Datasheet

Current PartRFQ

0287002.PXCN

Littelfuse Inc.In Stock: 156120287002.PXCN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0287002.PXCN qualifies as a direct substitute for the 0257002.U based on the following critical parameters:

• Current Rating: Identical at 2 A
• Voltage Rating - DC: Identical at 32 V
• Fuse Type: Automotive blade fuse
• Package / Case: Blade, ATO/ATC (mechanically compatible)
• Response Time: Fast Blow (identical protection characteristics)
• Breaking Capacity @ Rated Voltage: 1kA (identical)
• Melting I²t: 1.4 (identical thermal response)
• Operating Temperature Range: -40°C ~ 105°C (identical)
• DC Cold Resistance: 0.0535 Ohms (identical)
• RoHS Status: ROHS3 Compliant (identical compliance)

The 0287002.PXCN is manufactured by Littelfuse Inc. and maintains full electrical and mechanical compatibility with the obsolete 0257002.U.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0287002.PXCN is the appropriate substitute for the obsolete 0257002.U. Both components are manufactured by Littelfuse Inc. and maintain identical electrical specifications and mechanical form factors. The 0287002.PXCN carries active product status with significantly higher inventory availability (15,550 pcs vs. 741 pcs), ensuring reliable procurement for new designs and system maintenance.

Both parts maintain ROHS3 compliance and operate across the identical temperature range. The 0287002.PXCN carries UL approval while the original part carries cULus approval; both certifications are appropriate for automotive blade fuse applications.

Frequently Asked Questions (FAQ)

Q: Can the 0287002.PXCN be used as a direct replacement for the 0257002.U?

A: Yes. Both fuses share identical current rating (2A), voltage rating (32VDC), response time (Fast Blow), package type (Blade, ATO/ATC), and thermal characteristics (Melting I²t of 1.4). Physical dimensions are equivalent within manufacturing tolerance (0.750" vs. 0.752" length; 0.200" vs. 0.201" width; 0.480" vs. 0.484" height).

Q: What is the difference between the cULus and UL approvals?

A: Both certifications are valid for automotive fuse applications. cULus indicates dual certification (Canadian and US standards), while UL indicates US standards certification. The 0287002.PXCN with UL approval is appropriate for automotive applications.

Q: Are there any mechanical compatibility concerns?

A: No. Both fuses use the Blade, ATO/ATC package type and are designed for identical holder applications. Dimensional variations are within standard manufacturing tolerances and do not affect holder compatibility.

Q: Why is the 0257002.U listed as obsolete?

A: The 0257002.U has been discontinued by Littelfuse Inc. The 0287002.PXCN represents the active equivalent product line and should be used for all new procurement and system support.

Q: What is the difference in packaging between the two parts?

A: The 0257002.U was packaged in quantities of 500 pieces per container, while the 0287002.PXCN is available in bulk packaging. This does not affect electrical or mechanical performance.