Littelfuse 0257010.U Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0257010.U is a 10A 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 substitute part maintains identical electrical and mechanical specifications while offering current manufacturing availability and active product support.

Substiute Parts

0257010.U

Littelfuse Inc.In Stock: 7840257010.U Datasheet

Current PartRFQ

0287010.PXCN

Littelfuse Inc.In Stock: 3231800287010.PXCN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0287010.PXCN qualifies as a direct substitute for the 0257010.U based on the following critical parameters:

• Current Rating: Both parts are rated at 10 A
• Voltage Rating: Both parts are rated at 32 V DC
• Fuse Type: Both are automotive-grade fuses
• Package / Case: Both use Blade, ATO/ATC form factor
• Breaking Capacity: Both rated at 1 kA @ rated voltage
• Melting I²t: Both have identical melting I²t value of 115
• Operating Temperature: Both operate across -40°C ~ 105°C
• DC Cold Resistance: Both measure 0.0077 Ohms
• RoHS Compliance: Both are ROHS3 Compliant
• Approval Agency: Both carry recognized safety certifications (cULus / UL)

The dimensional specifications are equivalent within manufacturing tolerance (0.750" vs 0.752" length; 0.200" vs 0.201" width; 0.480" vs 0.484" height).

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0287010.PXCN is the appropriate substitute for the obsolete 0257010.U. Both parts are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications. The substitute part carries Active product status, ensuring long-term availability and manufacturing support. Both parts maintain ROHS3 compliance and carry recognized safety certifications (cULus and UL respectively). The dimensional tolerances between the two parts are within acceptable manufacturing variation for ATO/ATC blade fuse applications. Procurement of the 0287010.PXCN eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing ATO/ATC fuse holder installations.

Frequently Asked Questions (FAQ)

Q: Can the 0287010.PXCN be used as a direct replacement in applications currently using the 0257010.U?

A: Yes. Both parts are identical in current rating (10 A), voltage rating (32 V DC), fuse type (automotive), package format (Blade, ATO/ATC), breaking capacity (1 kA), melting I²t (115), operating temperature range (-40°C ~ 105°C), and DC cold resistance (0.0077 Ohms). The dimensional differences are within manufacturing tolerance for this product category.

Q: What is the primary reason for substitution?

A: The 0257010.U carries an Obsolete product status. The 0287010.PXCN is the active equivalent part from the same manufacturer, ensuring continued availability and manufacturing support.

Q: Are there any compliance or certification differences between these parts?

A: Both parts are ROHS3 Compliant. The 0257010.U carries cULus approval while the 0287010.PXCN carries UL approval. Both certifications are recognized safety standards for automotive fuse applications.

Q: Will the 0287010.PXCN fit in existing ATO/ATC fuse holders designed for the 0257010.U?

A: Yes. Both parts use the Blade, ATO/ATC package format. The dimensional specifications are equivalent within manufacturing tolerance, ensuring proper fit and electrical contact in standard ATO/ATC holders.

Q: What is the difference in response time between these parts?

A: The 0287010.PXCN is specified as Fast Blow. The 0257010.U does not have a specified response time in the available data. Both parts share identical melting I²t values (115), which is the primary parameter governing fuse response characteristics.

Q: Is the 0287010.PXCN available in the same packaging as the 0257010.U?

A: The 0257010.U was packaged in quantities of 500 pieces. The 0287010.PXCN is available in Bulk packaging. For specific quantity requirements, consult with your component supplier regarding available packaging options.