GMC-600-R Equivalent & Substitute Parts

Part Overview

The GMC-600-R is a 600 mA, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for applications requiring medium-blow response characteristics in a 5mm x 20mm form factor. The part is currently active in production with 687 pieces in stock. Equivalent substitute parts are identified to provide procurement flexibility, inventory alternatives, and continuity of supply for applications where the primary part may be unavailable or where design specifications permit functional equivalents.

Key Parameters

Parameter	Value
Current Rating	600 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Medium Blow
Mounting Type	Requires Holder
Melting I²t	0.6
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the GMC-600-R is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Current Rating: 600 mA
Voltage Rating (AC): 250 V
Fuse Type: Cartridge, Glass
Package / Case: 5mm x 20mm
Response Time: Medium Blow
Mounting Type: Requires Holder

The MSC-600MA from OptiFuse meets all mandatory matching parameters and is classified as a parametric equivalent. Both parts share identical current, voltage, fuse type, physical dimensions, response characteristics, and mounting requirements. Substitution is valid where these core electrical and mechanical specifications are required by the application circuit design.

Parameter Comparison

Parameter	GMC-600-R (Eaton)	MSC-600MA (OptiFuse)	Match Status
Current Rating (Amps)	600 mA	600 mA	Equivalent
Voltage Rating - AC	250 V	250 V	Equivalent
Fuse Type	Cartridge, Glass	Cartridge, Glass	Equivalent
Package / Case	5mm x 20mm	5mm x 20mm	Equivalent
Response Time	Medium Blow	Medium Blow	Equivalent
Mounting Type	Requires Holder	Requires Holder	Equivalent
Melting I²t	0.6	0.6552	Comparable
Breaking Capacity @ Rated Voltage	35 A	100 A	MSC-600MA Higher
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Approval Agency	CSA, KC-MARK, UL	cULus, UL 248	Both UL Certified

Engineering Selection Recommendations

GMC-600-R (Eaton - Electronics Division):

Primary part with active production status
Holds CSA, KC-MARK, and UL approvals
Suitable for applications requiring Eaton component specifications
687 units currently in stock

MSC-600MA (OptiFuse):

Parametric equivalent with active production status
Holds cULus and UL 248 certifications
Higher breaking capacity (100 A vs. 35 A) provides enhanced fault protection margin
Larger inventory availability (2954 units in stock)
Operating temperature range specified: -55°C to 125°C
Moisture sensitivity level: 1 (Unlimited)

Both parts satisfy the core electrical and mechanical requirements for 600 mA, 250 V AC/DC fuse applications in 5mm x 20mm cartridge form. Selection between GMC-600-R and MSC-600MA depends on manufacturer preference, supply chain requirements, and specific application approval documentation.

Frequently Asked Questions (FAQ)

Q: Can MSC-600MA be used as a direct replacement for GMC-600-R?

A: Yes. Both parts are parametric equivalents with matching current rating (600 mA), voltage rating (250 V AC), fuse type (cartridge glass), physical dimensions (5mm x 20mm), response time (medium blow), and mounting requirements (requires holder). Both are ROHS3 compliant and UL certified.

Q: What is the difference in breaking capacity between these parts?

A: The GMC-600-R has a breaking capacity of 35 A at rated voltage, while the MSC-600MA has a breaking capacity of 100 A at rated voltage. The MSC-600MA provides higher fault current interruption capability. Application circuit requirements determine if this difference is relevant to component selection.

Q: Are the physical dimensions identical?

A: Yes. Both parts are specified as 5mm x 20mm (0.205" Dia x 0.787" L) and fit the same holder and mounting footprint.

Q: Do both parts require a fuse holder?

A: Yes. Both GMC-600-R and MSC-600MA are cartridge fuses that require a compatible holder for installation. They are not panel-mount or inline fuses.

Q: What certifications apply to each part?

A: GMC-600-R holds CSA, KC-MARK, and UL approvals. MSC-600MA holds cULus and UL 248 certifications. Both meet UL standards for fuse products.

Q: Is there a difference in melting I²t values?

A: The GMC-600-R specifies 0.6 A²s, while the MSC-600MA specifies 0.6552 A²s. These values are comparable and both represent medium-blow response characteristics.

Q: What is the operating temperature range for each part?

A: The GMC-600-R does not specify an operating temperature range in the provided data. The MSC-600MA specifies -55°C to 125°C operating temperature range.

Q: Which part has better inventory availability?

A: MSC-600MA has 2954 units in stock compared to 687 units for GMC-600-R, providing greater supply availability.

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