Littelfuse 0251007.M Equivalent & Substitute Parts

Part Overview

The Littelfuse 0251007.M is a 7 A, 125 V AC/DC board mount axial fuse from the PICO® II 251 series. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design and procurement requirements. The part features fast-blow response characteristics and is approved by CSA, cURus, and TUV standards. Due to its obsolete status, sourcing alternatives from the same manufacturer's active product line is essential for system continuity and supply chain reliability.

Substiute Parts

0251007.M

Littelfuse Inc.In Stock: 9750251007.M Datasheet

Current PartRFQ

0251007.MXL

Littelfuse Inc.In Stock: 24460251007.MXL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0251007.M is determined by strict equivalence across all electrical and mechanical parameters. The primary substitute, 0251007.MXL, maintains identical specifications for current rating, voltage ratings (AC and DC), response time, mounting configuration, package type, breaking capacity, melting I²t, operating temperature range, physical dimensions, and DC cold resistance. Both parts belong to the PICO® II 251 series and carry the same regulatory approvals. The key differentiator is product status and packaging format: the 0251007.M is obsolete with tape and reel packaging, while the 0251007.MXL is active with bulk packaging. This substitution is valid because all critical electrical and mechanical parameters remain unchanged.

Parameter Comparison

Engineering Selection Recommendations

The 0251007.MXL is the direct active equivalent for the obsolete 0251007.M. Both parts are manufactured by Littelfuse Inc. and carry identical electrical and mechanical specifications. The 0251007.MXL offers the advantage of active product status, ensuring continued availability and supply chain support. Additionally, the 0251007.MXL meets ROHS3 compliance requirements, whereas the 0251007.M is RoHS non-compliant. Both parts maintain CSA, cURus, and TUV approvals. For new designs or component replacement in existing systems, the 0251007.MXL is the appropriate selection. Packaging differences (tape and reel versus bulk) do not affect electrical or mechanical performance and should be evaluated based on procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can the 0251007.MXL be used as a direct replacement for the 0251007.M?

A: Yes. The 0251007.MXL is electrically and mechanically identical to the 0251007.M. All critical parameters including current rating, voltage ratings, response time, breaking capacity, melting I²t, physical dimensions, and DC cold resistance are equivalent. The primary difference is product status and RoHS compliance.

Q: What is the difference between the 0251007.M and 0251007.MXL packaging?

A: The 0251007.M is supplied in tape and reel packaging, while the 0251007.MXL is supplied in bulk packaging. This distinction affects procurement and assembly processes but does not impact electrical or mechanical performance.

Q: Are both parts approved by the same regulatory agencies?

A: Yes. Both the 0251007.M and 0251007.MXL carry approvals from CSA, cURus, and TUV. These certifications remain valid for both parts.

Q: Why is the 0251007.M classified as obsolete?

A: The 0251007.M has been discontinued by Littelfuse Inc. The 0251007.MXL represents the active equivalent within the PICO® II 251 series and is the recommended part for ongoing procurement.

Q: Does the RoHS compliance difference affect substitution?

A: The 0251007.MXL is ROHS3 compliant, while the 0251007.M is RoHS non-compliant. For applications requiring RoHS compliance, the 0251007.MXL is the appropriate choice. For legacy systems using the 0251007.M, substitution with the 0251007.MXL provides improved environmental compliance without altering circuit performance.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.110" diameter by 0.280" length (2.80mm x 7.11mm). They are mechanically interchangeable in through-hole board mount applications.