Equivalent & Substitute Parts for BK/GMC-600MA

Part Overview

The BK/GMC-600MA is a 600 mA, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete, requiring identification of active equivalent alternatives for continued system support and procurement. The fuse operates at medium blow response time with a 5mm x 20mm form factor and requires a dedicated holder for installation. Equivalent substitute parts maintain identical electrical and mechanical specifications while offering active product status and improved compliance certifications.

Substiute Parts

BK/GMC-600MA

Eaton - Electronics DivisionIn Stock: 900BK/GMC-600MA Datasheet

Current PartRFQ

BK/GMC-600-R

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

DirectRFQ

BK1/GMC-600-R

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

Parametric EquivalentRFQ

GMC-600-R

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

Parametric EquivalentRFQ

MSC-600MA

OptiFuseIn Stock: 2999MSC-600MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/GMC-600MA is determined by strict equivalence across the following parameters:

Critical Matching 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)
• Mounting Type: Requires Holder (exact match required)

Acceptable Variation Parameters:

• Breaking Capacity: Eaton parts specify 35A; OptiFuse MSC-600MA specifies 100A. Higher breaking capacity does not compromise substitution validity.
• Melting I²t: Eaton parts specify 0.6; OptiFuse specifies 0.6552. Variance within 0.0552 is acceptable.
• Approval Agencies: Eaton parts carry CSA, KC-MARK, UL; OptiFuse carries cULus, UL 248. Both certifications satisfy industrial standards.
• RoHS Status: BK/GMC-600MA is non-compliant; substitute parts are ROHS3 compliant, representing improved environmental compliance.

All identified substitute parts meet these criteria and are classified as direct or parametric equivalents.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Eaton - Electronics Division):

The parts BK/GMC-600-R, BK1/GMC-600-R, and GMC-600-R are direct Eaton equivalents to the obsolete BK/GMC-600MA. All three maintain identical electrical specifications and mechanical form factor. Selection among these three Eaton variants is based on packaging designation and approval agency requirements:

• BK/GMC-600-R: Recommended for applications requiring CSA, KC-MARK, and UL certifications. Active product status with 944 units in inventory.
• BK1/GMC-600-R: Recommended for applications requiring CSA, KC, and UL certifications. Active product status with 1076 units in inventory (highest Eaton stock level).
• GMC-600-R: Recommended for applications requiring CSA, KC-MARK, and UL certifications. Active product status with 687 units in inventory.

All three Eaton substitutes are ROHS3 compliant, addressing environmental compliance improvements over the obsolete BK/GMC-600MA.

Secondary Substitute (OptiFuse):

The MSC-600MA from OptiFuse is a parametric equivalent offering identical current, voltage, and mechanical specifications. This part provides the following distinctions:

• Higher breaking capacity (100A vs. 35A) suitable for applications requiring enhanced fault protection margins.
• Slightly elevated melting I²t (0.6552 vs. 0.6), within acceptable tolerance for medium-blow fuse operation.
• cULus and UL 248 certifications, meeting North American and international standards.
• Highest inventory availability (2954 units), supporting supply chain continuity.
• Operating temperature range specified (-55°C ~ 125°C), providing environmental performance data absent from Eaton specifications.

Selection of MSC-600MA is appropriate for applications where OptiFuse product support, higher breaking capacity, or extended temperature operation is required.

Frequently Asked Questions (FAQ)

Q: Can BK/GMC-600-R directly replace BK/GMC-600MA in existing designs?

A: Yes. BK/GMC-600-R is a direct substitute maintaining identical current rating (600 mA), voltage rating (250 V AC), fuse type (cartridge, glass), package dimensions (5mm x 20mm), response time (medium blow), and mounting requirements (requires holder). The primary difference is product status (active vs. obsolete) and improved RoHS3 compliance.

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

A: All three are Eaton equivalents with identical electrical and mechanical specifications. Differences exist only in approval agency certifications: BK/GMC-600-R and GMC-600-R include KC-MARK certification, while BK1/GMC-600-R includes KC certification without the MARK designation. Selection depends on regional certification requirements.

Q: Is MSC-600MA from OptiFuse compatible with BK/GMC-600MA applications?

A: Yes. MSC-600MA is a parametric equivalent meeting all critical specifications: 600 mA current rating, 250 V AC voltage rating, 5mm x 20mm package, medium-blow response, and cartridge glass fuse type. The higher breaking capacity (100A vs. 35A) and slightly elevated melting I²t (0.6552 vs. 0.6) do not compromise compatibility and may provide enhanced protection margins.

Q: Does the higher breaking capacity of MSC-600MA affect circuit protection?

A: No. Breaking capacity defines the maximum fault current a fuse can safely interrupt without rupturing. Higher breaking capacity (100A in MSC-600MA vs. 35A in Eaton parts) indicates superior fault handling capability and does not alter the fuse's response to normal or overload currents. The 600 mA current rating and medium-blow response time remain unchanged.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitutes (BK/GMC-600-R, BK1/GMC-600-R, GMC-600-R, and MSC-600MA) are ROHS3 compliant. The original BK/GMC-600MA is non-compliant, making substitution necessary for applications subject to RoHS environmental regulations.

Q: What certifications do these fuses carry?

A: Eaton parts (BK/GMC-600-R, BK1/GMC-600-R, GMC-600-R) carry CSA, UL, and KC or KC-MARK certifications. OptiFuse MSC-600MA carries cULus and UL 248 certifications. All certifications satisfy industrial and commercial fuse standards.

Q: Can I mix different substitute parts in the same circuit or system?

A: Yes. All substitute parts are parametrically equivalent and can be used interchangeably within the same circuit or system. However, for consistency and supply chain management, standardizing on a single part number is recommended.

Q: Which substitute offers the best inventory availability?

A: MSC-600MA from OptiFuse offers the highest inventory level (2954 units), followed by BK1/GMC-600-R (1076 units), BK/GMC-600-R (944 units), and GMC-600-R (687 units).

Q: Does MSC-600MA provide operating temperature specifications?

A: Yes. MSC-600MA specifies an operating temperature range of -55°C to 125°C. Eaton parts do not provide operating temperature data in the available specifications.