Littelfuse 0251012.M Equivalent & Substitute Parts

Part Overview

The Littelfuse 0251012.M is a 12 A, 32 V AC/DC board mount axial fuse from the PICO® II 251 series, designed for through-hole PCB applications. This part is classified as obsolete, making identification of active equivalent components essential for ongoing production and maintenance requirements. The substitute part maintains identical electrical and mechanical specifications while offering improved compliance status and current inventory availability.

Substiute Parts

0251012.M

Littelfuse Inc.In Stock: 8070251012.M Datasheet

Current PartRFQ

0251012.MXL

Littelfuse Inc.In Stock: 11490251012.MXL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0251012.MXL qualifies as a direct substitute for the 0251012.M based on the following criteria:

Electrical Parameters Match:

• Current Rating: 12 A (identical)
• Voltage Rating AC: 32 V (identical)
• Voltage Rating DC: 32 V (identical)
• Response Time: Fast Blow (identical)
• Breaking Capacity: 50 A AC, 300 A DC (identical)
• Melting I²t: 45.2 (identical)
• DC Cold Resistance: 0.0059 Ohms (identical)

Mechanical Parameters Match:

• Mounting Type: Through Hole (identical)
• Fuse Type: Board Mount (Cartridge Style Excluded) (identical)
• Package / Case: Axial (identical)
• Size / Dimension: 0.110" Dia x 0.280" L (2.80 mm x 7.11 mm) (identical)

Certification Match:

• Approval Agencies: CSA, cURus (identical)
• Operating Temperature Range: -55°C to 125°C (identical)

The substitution is valid because all critical electrical, mechanical, and thermal parameters are identical between the main part and the substitute.

Parameter Comparison

Engineering Selection Recommendations

The 0251012.MXL is the appropriate selection for new designs and production continuity:

Product Status: The 0251012.M is classified as obsolete, while the 0251012.MXL maintains active product status with confirmed inventory availability (1057 pcs in stock versus 723 pcs for the obsolete part).

Compliance: The 0251012.MXL achieves ROHS3 compliance, whereas the 0251012.M is RoHS non-compliant. For applications subject to RoHS regulations or environmental compliance requirements, the substitute part satisfies current regulatory standards.

Electrical and Mechanical Equivalence: All functional parameters are identical, ensuring direct PCB compatibility and circuit performance equivalence without design modification.

Certifications: Both parts maintain identical CSA and cURus approvals, confirming equivalent safety and performance standards.

Frequently Asked Questions (FAQ)

Q: Can the 0251012.MXL be used as a direct replacement for the 0251012.M in existing designs?

A: Yes. The 0251012.MXL is electrically and mechanically identical to the 0251012.M. All current ratings, voltage ratings, response characteristics, physical dimensions, and thermal specifications match exactly. No circuit modifications are required.

Q: What is the difference between the 0251012.M and 0251012.MXL?

A: The primary differences are product status and compliance. The 0251012.M is obsolete with RoHS non-compliant status. The 0251012.MXL is an active product with ROHS3 compliance. Packaging differs (the main part uses standard packaging; the substitute uses bulk packaging), but electrical and mechanical performance are identical.

Q: Are there any compatibility concerns with PCB footprints?

A: No. Both parts use identical axial through-hole mounting with the same physical dimensions (0.110" Dia x 0.280" L). PCB footprints designed for the 0251012.M will accommodate the 0251012.MXL without modification.

Q: Does the substitute part meet the same safety certifications?

A: Yes. Both the 0251012.M and 0251012.MXL carry identical CSA and cURus approvals, confirming equivalent safety performance and regulatory compliance for their respective product statuses.

Q: What is the inventory status for each part?

A: The 0251012.M (obsolete) has 723 pcs in stock. The 0251012.MXL (active) has 1057 pcs in stock, providing greater availability for ongoing production requirements.