Littelfuse 0263004.M Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0263004.M is a 4A 250VAC board mount fuse in axial package configuration, designed for through-hole PCB mounting applications. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The substitute part maintains identical electrical and mechanical specifications while offering improved compliance status and current inventory availability.

Substiute Parts

0263004.M

Littelfuse Inc.In Stock: 11830263004.M Datasheet

Current PartRFQ

0263004.MXL

Littelfuse Inc.In Stock: 18500263004.MXL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0263004.MXL qualifies as a direct substitute based on the following critical parameters:

• Current Rating: Identical at 4 A
• Voltage Rating: Identical at 250 VAC
• Response Characteristic: Identical fast-blow response time
• Mounting Configuration: Identical through-hole axial package
• Physical Dimensions: Identical at 0.155" Dia x 0.280" L
• Electrical Performance: Identical breaking capacity (50 A), melting I²t (3.08), and DC cold resistance (0.0193 Ohms)
• Temperature Range: Identical operating range of -55°C to 125°C
• Certifications: Identical approval agencies (CSA, PSE, UR)

The substitution is based on complete electrical and mechanical equivalence. The primary distinction is product status and compliance classification.

Parameter Comparison

Engineering Selection Recommendations

The 0263004.MXL is the direct replacement for the obsolete 0263004.M. Selection of the active substitute part is based on:

• Product Lifecycle: The 0263004.M is obsolete; the 0263004.MXL maintains active production status with established supply chain availability (1808 Pcs in stock versus 1085 Pcs for the obsolete variant).
• Regulatory Compliance: The 0263004.MXL achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. The substitute also maintains REACH Unaffected status.
• Electrical Equivalence: All functional parameters are identical, ensuring direct PCB compatibility without circuit redesign.
• Certification Continuity: Both parts carry identical regulatory approvals (CSA, PSE, UR), maintaining compliance in target markets.

For new designs and production transitions, the 0263004.MXL is the specified replacement.

Frequently Asked Questions (FAQ)

Q: Can the 0263004.MXL be used as a direct drop-in replacement for the 0263004.M?

A: Yes. The parts are electrically and mechanically identical. The axial package dimensions, current rating, voltage rating, response time, and all electrical characteristics are equivalent. PCB footprints and circuit performance remain unchanged.

Q: What is the difference between the 0263004.M and 0263004.MXL?

A: The primary differences are product status and compliance classification. The 0263004.M is obsolete and RoHS non-compliant. The 0263004.MXL is an active product that meets ROHS3 compliance requirements. All electrical and mechanical specifications are identical.

Q: Why should I transition from 0263004.M to 0263004.MXL?

A: The 0263004.M is obsolete and subject to discontinuation. The 0263004.MXL ensures long-term supply availability, regulatory compliance with current standards, and maintains identical performance characteristics for seamless integration.

Q: Are there packaging differences between these parts?

A: The 0263004.M is supplied in standard packaging, while the 0263004.MXL is supplied in bulk packaging. Both maintain identical component specifications and axial through-hole configuration.

Q: Do both parts meet the same regulatory certifications?

A: Yes. Both the 0263004.M and 0263004.MXL carry identical approvals from CSA, PSE, and UR. The 0263004.MXL additionally maintains REACH Unaffected status.