Littelfuse 025707.5U Automotive Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 025707.5U is a 7.5 A automotive blade fuse rated for 32 V DC operation in ATO/ATC form factor. This component is classified as obsolete, necessitating identification of active equivalent parts for continued system support and procurement. The fuse is designed for automotive electrical protection applications requiring holder-based mounting and meets cULus approval standards.

Substiute Parts

025707.5U

Littelfuse Inc.In Stock: 1034025707.5U Datasheet

Current PartRFQ

028707.5PXCN

Littelfuse Inc.In Stock: 48343028707.5PXCN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete Littelfuse 025707.5U is based on electrical and mechanical parameter equivalence. The primary substitute, Littelfuse 028707.5PXCN, maintains identical electrical characteristics: 7.5 A current rating, 32 V DC voltage rating, and 60 melting I²t value. Both components utilize the ATO/ATC blade form factor with holder-based mounting, ensuring mechanical compatibility within existing fuse holders.

The substitution is valid based on the following matched parameters:

• Current Rating: 7.5 A (identical)
• Voltage Rating: 32 V DC (identical)
• Melting I²t: 60 (identical)
• Package / Case: Blade, ATO/ATC (identical)
• Mounting Type: Requires Holder (identical)
• Operating Temperature Range: -40°C to 105°C (identical)
• DC Cold Resistance: 0.01091 Ohms (identical)
• RoHS Compliance: ROHS3 Compliant (identical)

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 028707.5PXCN is the direct active equivalent for the obsolete 025707.5U. Both components are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications. The substitute part carries active product status with expanded approval certifications (CSA and UL), providing enhanced regulatory coverage compared to the original cULus approval. Both components maintain ROHS3 compliance and operate across the identical temperature range of -40°C to 105°C. The dimensional tolerances between the two parts are negligible (025707.5U: 19.05mm × 5.08mm × 12.19mm; 028707.5PXCN: 19.10mm × 5.10mm × 12.30mm), ensuring compatibility with existing ATO/ATC fuse holders.

Frequently Asked Questions (FAQ)

Q: Can the 028707.5PXCN directly replace the 025707.5U in existing applications?

A: Yes. Both components share identical current rating (7.5 A), voltage rating (32 V DC), melting I²t (60), and ATO/ATC blade form factor. Mechanical compatibility with existing fuse holders is confirmed.

Q: What is the significance of the product status change from Obsolete to Active?

A: The 028707.5PXCN maintains active manufacturing status, ensuring continued availability and supply chain reliability. The obsolete status of the 025707.5U indicates discontinued production.

Q: Are there differences in approval certifications between these parts?

A: The 025707.5U carries cULus approval, while the 028707.5PXCN carries CSA and UL approvals. Both certifications are recognized for automotive fuse applications.

Q: Do the dimensional differences between the two parts affect compatibility?

A: No. The dimensional variance (0.05mm to 0.10mm across all axes) is within standard manufacturing tolerance and does not affect compatibility with ATO/ATC fuse holders.

Q: Is the DC cold resistance specification identical between both parts?

A: Yes. Both components specify 0.01091 Ohms DC cold resistance, confirming electrical equivalence.

Q: What is the operating temperature range for both parts?

A: Both the 025707.5U and 028707.5PXCN operate across -40°C to 105°C, providing identical thermal performance specifications.