Littelfuse 025102.5MAT1 PICO® II 251 Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 025102.5MAT1 is a 2.5 A, 125 V AC/DC board mount axial fuse from the PICO® II 251 series. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The substitute parts listed maintain identical electrical and mechanical specifications while offering active product status and improved compliance certifications.

Substiute Parts

025102.5MAT1

Littelfuse Inc.In Stock: 830025102.5MAT1 Datasheet

Current PartRFQ

025102.5MAT1L

Littelfuse Inc.In Stock: 2514025102.5MAT1L Datasheet

DirectRFQ

025102.5HAT1L

Littelfuse Inc.In Stock: 948025102.5HAT1L Datasheet

Parametric EquivalentRFQ

025102.5NAT1L

Littelfuse Inc.In Stock: 3974025102.5NAT1L Datasheet

Parametric EquivalentRFQ

025102.5NAT6L

Littelfuse Inc.In Stock: 1102025102.5NAT6L Datasheet

Parametric EquivalentRFQ

025102.5PAT1L

Littelfuse Inc.In Stock: 860025102.5PAT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 025102.5MAT1 is determined by strict equivalence across the following parameters:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Axial (exact match required)
• Physical Dimensions: 0.110" Dia x 0.280" L (exact match required)
• Breaking Capacity: 50A AC, 300A DC (exact match required)
• Melting I²t: 0.721 (exact match required)
• DC Cold Resistance: 0.036 Ohms (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)
• Series: PICO® II 251 (exact match required)

All four substitute parts meet these criteria. Differences exist only in packaging format and product status, not in electrical or mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts are electrically and mechanically equivalent to the 025102.5MAT1. Selection should be based on the following factors:

Product Status: The original 025102.5MAT1 is obsolete. All substitute parts (025102.5MAT1L, 025102.5HAT1L, 025102.5NAT1L, 025102.5NAT6L, 025102.5PAT1L) carry active product status, ensuring long-term availability and continued manufacturer support.

Compliance: The original part is RoHS non-compliant. All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Packaging Format: Selection between Cut Tape (CT) and Tape & Box (TB) formats depends on assembly process requirements and volume needs. Cut Tape is suitable for automated pick-and-place operations, while Tape & Box provides protective packaging for lower-volume applications.

Inventory Availability: 025102.5NAT1L offers the highest inventory level (3890 Pcs), followed by 025102.5MAT1L (2448 Pcs), making these options preferable for immediate procurement needs.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the 025102.5MAT1?

A: Yes. All substitute parts maintain identical electrical specifications (2.5 A, 125 V AC/DC, Fast Blow response) and mechanical dimensions (0.110" Dia x 0.280" L axial package). They are functionally equivalent for circuit protection applications.

Q: What is the difference between Cut Tape (CT) and Tape & Box (TB) packaging?

A: Cut Tape packaging is supplied on continuous tape suitable for automated assembly equipment. Tape & Box includes protective outer packaging and is typically used for manual assembly or lower-volume applications. Both formats contain identical components.

Q: Why should I choose an active product over the obsolete 025102.5MAT1?

A: Active products receive ongoing manufacturer support, quality assurance, and guaranteed long-term availability. Obsolete parts face discontinuation risk and may have limited stock. Active substitutes ensure design continuity and supply chain reliability.

Q: Are there any electrical performance differences between the substitute parts?

A: No. All parts share identical electrical parameters: 2.5 A current rating, 125 V AC/DC voltage rating, 0.721 melting I²t, 50A AC / 300A DC breaking capacity, and 0.036 Ohms DC cold resistance. Differences are limited to packaging format and compliance certifications.

Q: Which substitute part should I select for new designs?

A: For new designs, select from the active products based on packaging requirements and inventory availability. 025102.5NAT1L (Cut Tape) or 025102.5MAT1L (Cut Tape) are recommended for automated assembly. 025102.5HAT1L, 025102.5NAT6L, or 025102.5PAT1L (Tape & Box) are suitable for manual assembly or lower-volume production.

Q: Do all substitute parts meet the same regulatory approvals?

A: Yes. All parts carry identical approval certifications: CCC, CSA, cURus, PSE, and TUV. All are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component use.