Equivalent & Substitute Parts for 5MT 600-R Glass Cartridge Fuse

Part Overview

The 5MT 600-R is a 600 mA, 250 V AC/DC glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm form factor. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs. The fuse requires a compatible holder for installation and is designed for medium-blow response applications.

Substiute Parts

5MT 600-R

Bel Fuse Inc.In Stock: 11065MT 600-R Datasheet

Current PartRFQ

BK/GMC-600-R

Eaton - Electronics DivisionIn Stock: 1052BK/GMC-600-R Datasheet

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BK1/GMC-600-R

Eaton - Electronics DivisionIn Stock: 1100BK1/GMC-600-R Datasheet

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GMC-600-R

Eaton - Electronics DivisionIn Stock: 792GMC-600-R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5MT 600-R is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 600 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Medium Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 35A (exact match required)
• Mounting Type: Requires Holder (exact match required)

All three substitute parts—GMC-600-R, BK/GMC-600-R, and BK1/GMC-600-R—manufactured by Eaton Electronics Division meet these criteria and are classified as active products with current availability.

Parameter Comparison

Engineering Selection Recommendations

All three Eaton GMC series fuses (GMC-600-R, BK/GMC-600-R, BK1/GMC-600-R) are direct functional equivalents to the obsolete 5MT 600-R. Selection among these three variants should be based on:

1. Packaging requirements: All three are available in bulk packaging
2. Certification scope: GMC-600-R and BK/GMC-600-R include KC-MARK certification; BK1/GMC-600-R includes KC certification
3. Inventory availability: BK1/GMC-600-R (1076 pcs), BK/GMC-600-R (944 pcs), and GMC-600-R (687 pcs) are all in stock
4. Compliance: All three maintain ROHS3 compliance and share the same ECCN and HTSUS classifications as the original part

The lower DC cold resistance and melting I²t values in the Eaton substitutes indicate faster response characteristics compared to the original 5MT 600-R, which may require circuit validation in applications with tight timing requirements.

Frequently Asked Questions (FAQ)

Q: Can GMC-600-R, BK/GMC-600-R, and BK1/GMC-600-R be used interchangeably with 5MT 600-R?

A: Yes. All three Eaton fuses meet the electrical and mechanical specifications required for direct substitution: 600 mA current rating, 250 V AC voltage rating, 5mm x 20mm package, medium-blow response, and 35A breaking capacity. All require the same holder type for installation.

Q: What is the difference between GMC-600-R, BK/GMC-600-R, and BK1/GMC-600-R?

A: The three variants are electrically and mechanically identical. Differences exist only in certification scope (KC-MARK vs. KC) and packaging designation. Selection should be based on regional certification requirements and inventory availability.

Q: Are there compatibility concerns with fuse holders?

A: No. All substitute parts maintain the 5mm x 20mm cartridge form factor and require holder installation, identical to the original 5MT 600-R. Existing holders are compatible without modification.

Q: How do the DC cold resistance and melting I²t values affect substitution?

A: The Eaton substitutes exhibit lower DC cold resistance (0.282 Ω vs. 0.43 Ω) and lower melting I²t (0.6 vs. 1.5), indicating faster thermal response. In applications where the original fuse's thermal characteristics are critical to circuit protection timing, circuit validation is necessary to confirm the substitute's performance is acceptable.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All three Eaton GMC series fuses and the original 5MT 600-R are ROHS3 compliant. All share identical ECCN (EAR99) and HTSUS (8536.10.0020) classifications.