Littelfuse 0251002.M PICO® II 251 2A 125VAC/VDC Axial Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0251002.M is a 2A 125VAC/125VDC axial board mount fuse from the PICO® II 251 series, designed for through-hole PCB applications. This part carries an obsolete product status, making identification of active equivalent alternatives essential for ongoing production support, design updates, and component procurement strategies. Substitute parts maintain identical electrical and mechanical specifications while offering improved availability and compliance status.

Substiute Parts

0251002.M

Littelfuse Inc.In Stock: 10380251002.M Datasheet

Current PartRFQ

0251002.MXL

Littelfuse Inc.In Stock: 62880251002.MXL Datasheet

Parametric EquivalentRFQ

0251002.VXL

Littelfuse Inc.In Stock: 8310251002.VXL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0251002.M are determined by strict equivalence across all electrical and mechanical parameters. The following criteria establish substitutability:

• Current Rating: 2 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)
• Breaking Capacity: 50A AC, 300A DC (exact match required)
• Physical Dimensions: 0.110" Dia x 0.280" L (exact match required)
• DC Cold Resistance: 0.0473 Ohms (exact match required)
• Melting I²t: 0.405 (exact match required)
• Approval Agencies: CCC, CSA, cURus, PSE, TUV (exact match required)

The substitute parts 0251002.MXL and 0251002.VXL meet all these criteria and are classified as parametric equivalents within the PICO® II 251 series.

Parameter Comparison

Engineering Selection Recommendations

The 0251002.M is classified as obsolete, necessitating transition to active alternatives for new designs and ongoing production. Both substitute parts—0251002.MXL and 0251002.VXL—are active products with identical electrical and mechanical specifications.

0251002.MXL is the primary substitute, offering superior inventory availability (6232 units) and ROHS3 compliance. This part is suitable for all applications currently using the 0251002.M.

0251002.VXL is a secondary substitute with lower inventory levels (725 units) but maintains full parametric equivalence and ROHS3 compliance. Selection between MXL and VXL should be based on procurement lead times and inventory requirements.

Both substitutes carry identical approval certifications (CCC, CSA, cURus, PSE, TUV) and maintain the same breaking capacity, thermal characteristics, and electrical performance as the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can 0251002.MXL and 0251002.VXL be used interchangeably with 0251002.M?

A: Yes. Both substitute parts are parametric equivalents with identical current ratings (2A), voltage ratings (125VAC/125VDC), response time (Fast Blow), physical dimensions (0.110" Dia x 0.280" L), breaking capacity (50A AC, 300A DC), and all electrical characteristics. Direct substitution is supported without circuit modification.

Q: What is the difference between 0251002.MXL and 0251002.VXL?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The primary differences are packaging designation (both Bulk) and inventory availability. 0251002.MXL has higher stock levels (6232 units vs. 725 units). Selection should be based on procurement requirements and lead time considerations.

Q: Why is the main part 0251002.M obsolete?

A: The 0251002.M carries obsolete product status. Active alternatives (0251002.MXL and 0251002.VXL) provide equivalent functionality with improved compliance status (ROHS3 Compliant vs. RoHS non-compliant) and ongoing manufacturer support.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both 0251002.MXL and 0251002.VXL are ROHS3 Compliant, whereas the main part 0251002.M is RoHS non-compliant. This represents an improvement in environmental compliance for new designs and production runs.

Q: Do the substitute parts have the same approval certifications?

A: Yes. All three parts (0251002.M, 0251002.MXL, and 0251002.VXL) carry identical approval certifications: CCC, CSA, cURus, PSE, and TUV.

Q: Can these fuses be used in both AC and DC circuits?

A: Yes. All parts in this family are rated for 125V AC and 125V DC operation with a 2A current rating and Fast Blow response time, supporting dual-voltage applications.