Littelfuse 025104.6M Equivalent & Substitute Parts

Part Overview

The Littelfuse 025104.6M is a 4.6 A board mount axial fuse rated for 125 V AC/DC operation with fast blow response characteristics. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. The 025104.6MXL serves as the direct active production equivalent, offering identical electrical and mechanical specifications with improved compliance status.

Substiute Parts

025103.5M

LittelfuseIn Stock: 895025103.5M Datasheet

Current PartRFQ

025103.5MXL

Littelfuse Inc.In Stock: 1171025103.5MXL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 025104.6M is determined by strict equivalence across the following parameters:

• Current Rating: 4.6 A (exact match required)
• Voltage Ratings: 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 Style: Axial (exact match required)
• Breaking Capacity: 50 A AC / 300 A DC (exact match required)
• Melting I²t: 1.58 (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)
• Physical Dimensions: 0.110" Dia × 0.280" L (exact match required)
• DC Cold Resistance: 0.024 Ohms (exact match required)
• Approval Certifications: CSA, cURus, PSE, TUV (exact match required)

The 025104.6MXL meets all substitution criteria as a direct equivalent with identical electrical and mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

The 025104.6MXL is the direct substitute for the obsolete 025104.6M. Both components share identical electrical performance, mechanical dimensions, and regulatory certifications. The primary distinction is product status and compliance posture: the 025104.6MXL maintains active production status and meets ROHS3 compliance requirements, whereas the 025104.6M is obsolete and non-compliant with current environmental regulations.

For new designs and ongoing system support, the 025104.6MXL is the appropriate selection. For legacy system maintenance where original part specifications must be preserved, the 025104.6M remains functionally equivalent if inventory is available.

Frequently Asked Questions (FAQ)

Q: Can the 025104.6MXL be used as a direct replacement for the 025104.6M in existing applications?

A: Yes. The 025104.6MXL is electrically and mechanically identical to the 025104.6M. All electrical parameters, physical dimensions, and regulatory certifications are equivalent. Direct substitution is permissible without circuit modification.

Q: What is the difference between the 025104.6M and 025104.6MXL?

A: The components are functionally identical. The primary differences are product status (obsolete versus active) and RoHS compliance (non-compliant versus ROHS3 compliant). The 025104.6MXL is the current production equivalent.

Q: Are there any packaging differences between these parts?

A: The 025104.6M is packaged in standard format, while the 025104.6MXL is supplied in bulk packaging. Both use identical axial package geometry with 0.110" diameter and 0.280" length. Packaging format does not affect electrical or mechanical performance.

Q: What certifications apply to both parts?

A: Both the 025104.6M and 025104.6MXL carry identical regulatory approvals: CSA, cURus, PSE, and TUV. These certifications confirm compliance with safety standards for board mount fuses in the specified voltage and current ratings.

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

A: Yes. Both components are rated for 125 V AC and 125 V DC operation. The breaking capacity differs between AC (50 A) and DC (300 A) due to the different electrical characteristics of each circuit type.