Littelfuse 026304.6M Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 026304.6M is a 4.6 A, 250 V AC/DC board mount fuse with fast blow response characteristics, designed for through-hole axial mounting applications. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The substitute part maintains identical electrical and mechanical specifications while offering improved availability and current compliance status.

Substiute Parts

026303.5M

Littelfuse Inc.In Stock: 867026303.5M Datasheet

Current PartRFQ

026303.5MXL

Littelfuse Inc.In Stock: 1740026303.5MXL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 026304.6MXL qualifies as a direct substitute for the 026304.6M based on strict parameter equivalence across all critical electrical and mechanical specifications. Substitution is valid when the following parameters match identically:

• Current Rating: 4.6 A
• Voltage Rating (AC): 250 V
• Response Time: Fast Blow
• Mounting Type: Through Hole
• Fuse Type: Board Mount (Cartridge Style Excluded)
• Package / Case: Axial
• Breaking Capacity @ Rated Voltage: 50 A
• Size / Dimension: 0.155" Dia x 0.280" L (3.94mm x 7.11mm)
• DC Cold Resistance: 0.0224 Ohms
• Melting I²t: 2.33
• Approval Agencies: CSA, PSE, UR

The 026304.6MXL maintains all electrical performance characteristics and physical dimensions required for direct board-level replacement. The primary distinction is product status and compliance certification level.

Parameter Comparison

Engineering Selection Recommendations

The 026304.6MXL is the appropriate selection for new designs and ongoing procurement requirements. While the 026304.6M remains electrically and mechanically equivalent, its obsolete status creates supply chain risk and limits long-term availability. The 026304.6MXL carries active product status from Littelfuse Inc., ensuring continued manufacturing support and component availability.

The 026304.6MXL additionally meets ROHS3 compliance requirements, whereas the 026304.6M is non-compliant. Both parts maintain identical certifications from CSA, PSE, and UR approval agencies, confirming equivalent safety and performance standards.

For applications requiring the 026304.6M, direct substitution with 026304.6MXL is valid without circuit modification or re-qualification, provided that RoHS compliance requirements for the end application are satisfied.

Frequently Asked Questions (FAQ)

Q: Can the 026304.6MXL directly replace the 026304.6M in existing designs?

A: Yes. The 026304.6MXL is electrically and mechanically identical to the 026304.6M across all critical parameters including current rating, voltage rating, response time, physical dimensions, and breaking capacity. No circuit modifications are required for direct substitution.

Q: What is the primary difference between these two part numbers?

A: The 026304.6M is classified as obsolete, while the 026304.6MXL maintains active product status. Additionally, the 026304.6MXL is ROHS3 compliant, whereas the 026304.6M is non-compliant. All electrical and mechanical specifications remain identical.

Q: Are the approval certifications the same for both parts?

A: Yes. Both the 026304.6M and 026304.6MXL carry identical certifications from CSA, PSE, and UR approval agencies, confirming equivalent safety performance and regulatory compliance.

Q: Does the packaging differ between these parts?

A: The 026304.6M is supplied in standard packaging, while the 026304.6MXL is supplied in bulk packaging. The fuse components themselves are identical; only the packaging configuration differs.

Q: What is the operating temperature range for these fuses?

A: Both parts operate across the temperature range of -55°C to 125°C, ensuring performance consistency across industrial and commercial applications.

Q: Are these parts suitable for both AC and DC applications?

A: Yes. Both the 026304.6M and 026304.6MXL are rated for 250 V AC/DC operation, making them suitable for dual-voltage applications.