Littelfuse 0251.750MAT1 Equivalent & Substitute Parts

Part Overview

The Littelfuse 0251.750MAT1 is a 750 mA, 125 V AC/DC axial board mount fuse from the PICO® II 251 series. This component is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and ongoing production requirements. The substitute parts listed maintain identical electrical and mechanical specifications while offering improved product status and compliance certifications.

Substiute Parts

0251.750MAT1

LittelfuseIn Stock: 8230251.750MAT1 Datasheet

Current PartRFQ

0251.750MAT1L

Littelfuse Inc.In Stock: 405700251.750MAT1L Datasheet

DirectRFQ

0251.750HAT1L

Littelfuse Inc.In Stock: 12800251.750HAT1L Datasheet

Parametric EquivalentRFQ

0251.750NAT1L

Littelfuse Inc.In Stock: 56550251.750NAT1L Datasheet

Parametric EquivalentRFQ

0251.750NAT6L

Littelfuse Inc.In Stock: 7830251.750NAT6L Datasheet

Parametric EquivalentRFQ

0251.750PAT1L

Littelfuse Inc.In Stock: 12050251.750PAT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0251.750MAT1 is determined by strict equivalence across the following parameters:

• Current Rating: 750 mA (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)
• Breaking Capacity: 50A AC, 300A DC (exact match required)
• Melting I²t: 0.153 (exact match required)
• Physical Dimensions: 0.110" Dia x 0.280" L (exact match required)
• DC Cold Resistance: 0.175 Ohms (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Approval Agencies: CSA, cURus, TUV (exact match required)

All substitute parts listed below meet these criteria. Differences exist only in product status, packaging format, and RoHS compliance level.

Parameter Comparison

Engineering Selection Recommendations

The 0251.750MAT1 is obsolete and should be replaced with an active equivalent for new designs and production continuity. All listed substitute parts are electrically and mechanically identical and carry active product status.

Primary Recommendation: 0251.750MAT1L offers direct form-factor compatibility with Cut Tape packaging suitable for automated assembly processes. This part maintains ROHS3 compliance and is widely available.

Alternative Selections by Packaging:

• Cut Tape (CT) format: 0251.750MAT1L, 0251.750HAT1L, or 0251.750NAT1L
• Tape & Box (TB) format: 0251.750NAT6L or 0251.750PAT1L

All substitute parts carry identical electrical specifications, breaking capacity, thermal ratings, and regulatory approvals (CSA, cURus, TUV). Selection between alternatives should be based on packaging requirements and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can 0251.750MAT1 be directly replaced with any of the listed substitutes? A: Yes. All substitute parts are parametrically equivalent across current rating, voltage rating, response time, mounting type, package style, breaking capacity, melting I²t, physical dimensions, DC cold resistance, operating temperature range, and regulatory approvals.

Q: What is the difference between the substitute part numbers? A: The substitute parts differ only in packaging format and product status. The 0251.750MAT1L, 0251.750HAT1L, and 0251.750NAT1L are supplied in Cut Tape (CT) format. The 0251.750NAT6L and 0251.750PAT1L are supplied in Tape & Box (TB) format. All are active products with ROHS3 compliance.

Q: Does packaging format affect electrical performance? A: No. Packaging format (Cut Tape or Tape & Box) does not affect electrical or mechanical performance. Selection should be based on assembly equipment compatibility and supply chain requirements.

Q: Are all substitutes RoHS compliant? A: The original 0251.750MAT1 is RoHS non-compliant. All listed substitute parts are ROHS3 compliant, meeting current environmental regulations.

Q: What regulatory approvals do these fuses carry? A: All parts, including the original and substitutes, carry approvals from CSA, cURus, and TUV, ensuring compliance with North American and international safety standards.

Q: Can these fuses be used in both AC and DC circuits? A: Yes. All parts are rated for 125 V AC and 125 V DC operation with identical breaking capacity specifications for both applications.