Littelfuse 0251010.MAT1 PICO® II 251 Board Mount Fuse 10A 125VAC/VDC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0251010.MAT1 is a 10A 125VAC/VDC board mount fuse in the PICO® II 251 series, designed for through-hole axial mounting applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The electrical and mechanical specifications of this fuse establish the baseline parameters for identifying compatible alternatives within the same product family.

Substiute Parts

0251010.MAT1

Littelfuse Inc.In Stock: 10380251010.MAT1 Datasheet

Current PartRFQ

0251010.MAT1L

Littelfuse Inc.In Stock: 70800251010.MAT1L Datasheet

DirectRFQ

0251010.HAT1L

Littelfuse Inc.In Stock: 17880251010.HAT1L Datasheet

Parametric EquivalentRFQ

0251010.MAT1JL

Littelfuse Inc.In Stock: 20820251010.MAT1JL Datasheet

Parametric EquivalentRFQ

0251010.NAT1JL

Littelfuse Inc.In Stock: 10260251010.NAT1JL Datasheet

Parametric EquivalentRFQ

0251010.NAT1L

Littelfuse Inc.In Stock: 9060251010.NAT1L Datasheet

Parametric EquivalentRFQ

0251010.NF030JL

Littelfuse Inc.In Stock: 8350251010.NF030JL Datasheet

Parametric EquivalentRFQ

0251010.PAT1L

Littelfuse Inc.In Stock: 11710251010.PAT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 0251010.MAT1 is determined by strict equivalence across the following critical parameters:

• Current Rating: 10 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: 25.5 (exact match required)
• DC Cold Resistance: 0.0072 Ohms (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Approval Agencies: CSA, cURus, TUV (exact match required)
• Series: PICO® II 251 (exact match required)

All substitute parts listed below meet these criteria. Differences exist only in product status (active vs. obsolete), packaging format (Cut Tape, Tape & Box), RoHS compliance status, and REACH classification. These differences do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are electrically and mechanically equivalent to the obsolete 0251010.MAT1. Selection among active alternatives is determined by:

Product Status: All substitute parts carry Active product status, ensuring long-term availability and manufacturing support compared to the obsolete main part.

RoHS Compliance: Substitute parts 0251010.MAT1L, 0251010.HAT1L, 0251010.MAT1JL, 0251010.NAT1JL, 0251010.NF030JL, and 0251010.PAT1L are ROHS3 compliant. The original 0251010.MAT1 is RoHS non-compliant.

REACH Classification: Parts 0251010.MAT1L, 0251010.NAT1JL, 0251010.NF030JL, and 0251010.PAT1L are REACH Unaffected. Part 0251010.MAT1JL is REACH Affected.

Packaging Format: Cut Tape (CT) packaging is suitable for automated assembly processes. Tape & Box (TB) packaging is suitable for manual assembly or lower-volume applications.

Inventory Availability: Current stock levels vary across part numbers. 0251010.MAT1L offers the highest inventory (7004 pcs), followed by 0251010.MAT1JL (2049 pcs) and 0251010.PAT1L (1114 pcs).

Frequently Asked Questions (FAQ)

Q: Can I directly replace 0251010.MAT1 with any of the listed substitute parts?

A: Yes. All substitute parts are electrically and mechanically equivalent. They share identical current ratings (10A), voltage ratings (125V AC/DC), response time (Fast Blow), physical dimensions (0.110" Dia x 0.280" L), and all critical electrical parameters. The only differences are product status, packaging format, and compliance certifications.

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

A: Cut Tape packaging is optimized for automated pick-and-place assembly equipment. Tape & Box packaging includes a protective box and is suitable for manual assembly, kit assembly, or lower-volume production runs. Both formats contain the same fuse component.

Q: Why is the original 0251010.MAT1 marked as obsolete?

A: The original part is obsolete, meaning it is no longer in active production. All listed substitute parts are active and available from Littelfuse Inc., ensuring continued supply chain support.

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

A: No. All parts have identical electrical specifications: 10A current rating, 125V AC/125V DC voltage rating, Fast Blow response time, 50A AC / 300A DC breaking capacity, 25.5 Melting I²t, 0.0072 Ohms DC cold resistance, and -55°C to 125°C operating temperature range.

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

A: For new designs requiring RoHS3 compliance and REACH Unaffected status, select from 0251010.MAT1L, 0251010.NAT1JL, 0251010.NF030JL, or 0251010.PAT1L. For automated assembly, Cut Tape format (0251010.MAT1L or 0251010.HAT1L) is recommended. For manual or lower-volume assembly, Tape & Box format alternatives are suitable.

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

A: Yes. All parts are approved by CSA, cURus, and TUV, matching the original 0251010.MAT1 certifications.

Q: What is the difference between 0251010.MAT1L and 0251010.HAT1L?

A: Both parts are electrically and mechanically identical with identical specifications. The difference is in the internal design variant (indicated by the "H" vs. "M" designation), but this does not affect electrical performance or compatibility. Both are available in Cut Tape packaging and are ROHS3 compliant.