Equivalent & Substitute Parts for 5MF 6-R Glass Cartridge Fuse

Part Overview

The 5MF 6-R is a 6 A, 125 V AC/DC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm × 20mm form factor. This fuse is designed for circuits requiring fast response protection and is classified as Active product status. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the specified parameter tolerances.

Substiute Parts

5MF 6-R

Bel Fuse Inc.In Stock: 9505MF 6-R Datasheet

Current PartRFQ

0235006.HXP

Littelfuse Inc.In Stock: 15340235006.HXP Datasheet

DirectRFQ

0235006.MXP

Littelfuse Inc.In Stock: 15820235006.MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5MF 6-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 6 A (exact match required)
• Voltage Rating (AC): 125 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm × 20mm (exact match required)
• Breaking Capacity @ Rated Voltage: 10 kA (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The substitute parts 0235006.HXP and 0235006.MXP, both manufactured by Littelfuse Inc., meet all critical electrical and mechanical parameters. Minor variations in physical dimensions (0.205" diameter vs. 0.201" diameter) and DC cold resistance (0.0148 Ohms vs. 0.012 Ohms) fall within acceptable tolerances for cartridge fuse substitution and do not affect circuit protection performance.

Parameter Comparison

Engineering Selection Recommendations

Both 0235006.HXP and 0235006.MXP are qualified substitutes for the 5MF 6-R based on electrical equivalence and regulatory compliance. Selection between these options should be based on:

• Inventory availability: 0235006.HXP (1501 pcs) and 0235006.MXP (1561 pcs) are both in stock
• Regulatory certifications: Littelfuse substitutes include UL and KC approvals in addition to CE, CSA, and PSE
• Physical fit: Both substitutes have slightly larger diameter (5.20mm vs. 5.10mm) but remain compatible with standard 5×20mm fuse holders
• Thermal characteristics: Both substitutes operate within the same temperature range (-55°C ~ 125°C)

All three parts maintain Active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can 0235006.HXP and 0235006.MXP be used interchangeably with 5MF 6-R?

A: Yes. Both Littelfuse parts meet the critical electrical parameters: 6 A current rating, 125 V AC voltage rating, fast-blow response, 10 kA breaking capacity, and 5mm × 20mm package dimensions. Physical dimension variations (0.20mm diameter difference) are within acceptable tolerances for cartridge fuse holder compatibility.

Q: What is the difference between 0235006.HXP and 0235006.MXP?

A: Both parts are electrically and mechanically identical. They share the same current rating, voltage rating, response time, package dimensions, and approval certifications. Selection between them is based on inventory availability and procurement lead time.

Q: Are there any compliance differences between the main part and substitutes?

A: The Littelfuse substitutes (0235006.HXP and 0235006.MXP) include additional certifications (UL and KC) beyond those of the Bel Fuse 5MF 6-R (CE, CSA, cULus, PSE). This provides broader regulatory coverage for global applications.

Q: Will the slightly different DC cold resistance affect circuit performance?

A: No. The DC cold resistance difference (0.012 Ohms vs. 0.0148 Ohms) is negligible in typical circuit applications and does not affect fuse protection characteristics or circuit operation.

Q: Can these fuses be used in any 5×20mm fuse holder?

A: Yes. All three parts require a standard 5×20mm fuse holder. The minor diameter variation (5.10mm vs. 5.20mm) is within the tolerance of standard fuse holder designs.