Littelfuse 0257005.L Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0257005.L is a 5A 32VDC automotive blade fuse designed for ATO/ATC holder applications. This part carries an Obsolete product status, making identification of active equivalent components essential for ongoing system support and procurement planning. The fuse provides fast-blow protection with a 1kA breaking capacity and operates across the -40°C to 105°C temperature range typical of automotive environments.

Substiute Parts

0257005.L

Littelfuse Inc.In Stock: 8490257005.L Datasheet

Current PartRFQ

0287005.PXCN

Littelfuse Inc.In Stock: 2908810287005.PXCN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0287005.PXCN qualifies as a direct substitute based on the following critical parameters:

• Current Rating: 5 A (identical)
• Voltage Rating - DC: 32 V (identical)
• Package / Case: Blade, ATO/ATC (identical)
• Response Time: Fast Blow (identical)
• Breaking Capacity @ Rated Voltage: 1kA (identical)
• Melting I²t: 26 (identical)
• DC Cold Resistance: 0.01785 Ohms (identical)
• Operating Temperature Range: -40°C ~ 105°C (identical)
• Fuse Type: Automotive (identical)
• Mounting Type: Requires Holder (identical)

The substitute part maintains all electrical and mechanical specifications required for direct replacement in ATO/ATC holder applications. Physical dimensions show negligible variation (0.750" vs 0.752" length; 0.200" vs 0.201" width; 0.480" vs 0.484" height), which remains within acceptable tolerance for blade fuse holder compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 0287005.PXCN serves as the active production equivalent for the obsolete 0257005.L. Both parts are manufactured by Littelfuse Inc. and maintain identical electrical specifications, breaking capacity, and thermal characteristics. The substitute part carries Active product status with significantly higher inventory availability (290,794 pcs vs 814 pcs), ensuring long-term procurement viability.

Both parts comply with ROHS3 requirements and carry appropriate automotive safety certifications (cULus for the original; UL for the substitute). The substitute part's REACH Unaffected status provides additional regulatory clarity for European applications.

Frequently Asked Questions (FAQ)

Q: Can the 0287005.PXCN directly replace the 0257005.L in existing designs?

A: Yes. Both parts share identical current rating (5A), voltage rating (32VDC), package type (Blade, ATO/ATC), response time (Fast Blow), and breaking capacity (1kA). Physical dimensions are within acceptable tolerance for ATO/ATC holder compatibility.

Q: What is the significance of the series designation change from ATO® to ATOF®?

A: The series designation reflects Littelfuse's product line evolution. The ATOF® series represents the current production line for this specification class. The electrical and mechanical performance remains equivalent.

Q: Are there any compliance differences between these parts?

A: Both parts are ROHS3 compliant. The substitute part includes REACH Unaffected status, providing additional regulatory documentation for European markets. Both carry automotive-grade safety certifications.

Q: Why is the original part marked Obsolete?

A: The 0257005.L has been superseded by the 0287005.PXCN in Littelfuse's active product portfolio. The substitute part is the designated replacement for new designs and ongoing procurement.

Q: Are the physical dimension differences significant?

A: No. The variations (0.750" to 0.752" length; 0.200" to 0.201" width; 0.480" to 0.484" height) represent normal manufacturing tolerance and do not affect compatibility with standard ATO/ATC fuse holders.