GMC-5A Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The GMC-5A is a 5 A, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in applications requiring overcurrent protection with a 5mm x 20mm form factor. The component requires a compatible fuse holder for installation and operates with a medium blow response time characteristic.

Substitute parts are necessary when the primary GMC-5A is unavailable due to inventory constraints, supply chain disruptions, or when alternative manufacturers' components meet the same electrical and mechanical specifications for circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating - AC	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Medium Blow
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	100 A
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the GMC-5A glass cartridge fuse is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Current Rating: 5 A (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)

All substitute parts listed meet these criteria. Substitutes are grouped by manufacturer and product series while maintaining identical electrical performance and physical dimensions. The GMC-5-R variant operates at 125 V AC, which represents a different voltage class and is included as a substitute only where voltage derating is acceptable in the application circuit.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage Rating - AC (V)	Package / Case	Breaking Capacity @ Rated Voltage (A)	Melting I²t	DC Cold Resistance (Ohms)	RoHS Status	Inventory (Pcs)
GMC-5A	Eaton - Electronics Division	5	250	5mm x 20mm	10,000	Not Specified	Not Specified	Not Specified	706
GMC-5-R	Eaton - Electronics Division	5	125	5mm x 20mm	10,000	58	0.014	ROHS3 Compliant	1,046
0232005.MXF20P	Littelfuse Inc.	5	250	5mm x 20mm	100	56.72	0.0134	ROHS3 Compliant	1,071
0232005.MXF22P	Littelfuse Inc.	5	250	5mm x 20mm	100	56.72	0.0134	ROHS3 Compliant	937
0232005.MXP	Littelfuse Inc.	5	250	5mm x 20mm	100	56.72	0.0134	ROHS3 Compliant	1,343
MSC-5A	OptiFuse	5	250	5mm x 20mm	100	51.13	Not Specified	ROHS3 Compliant	5,195

Engineering Selection Recommendations

Full Voltage Equivalents (250 V AC):

The following parts are direct electrical and mechanical equivalents to the GMC-5A and may be selected without circuit modification:

0232005.MXF20P (Littelfuse Inc., Series 232): Meets all electrical parameters. Approval agencies include CE, KC, PSE. Operating temperature range -55°C to 125°C. Inventory: 1,071 units.
0232005.MXF22P (Littelfuse Inc., Series 232): Meets all electrical parameters. Approval agencies include CE, KC, PSE. Operating temperature range -55°C to 125°C. Inventory: 937 units.
0232005.MXP (Littelfuse Inc., Series 232): Meets all electrical parameters. Approval agencies include CE, KC, PSE. Operating temperature range -55°C to 125°C. Inventory: 1,343 units.
MSC-5A (OptiFuse, Series MSC): Meets all electrical parameters. Approval agencies include cULus, UL 248. Operating temperature range -55°C to 125°C. Inventory: 5,195 units.

Voltage-Derated Equivalent (125 V AC):

GMC-5-R (Eaton - Electronics Division, Series GMC): Operates at 125 V AC, representing a voltage derating from the 250 V specification. This part is electrically and mechanically compatible but is suitable only for applications where the circuit voltage does not exceed 125 V AC. Inventory: 1,046 units.

All listed substitutes are ROHS3 compliant and maintain the 5mm x 20mm physical form factor required for existing fuse holders.

Frequently Asked Questions (FAQ)

Q: Can the GMC-5-R be used as a direct replacement for the GMC-5A?

A: The GMC-5-R is mechanically compatible but operates at 125 V AC versus the GMC-5A's 250 V AC rating. It may be used only in circuits where the applied voltage does not exceed 125 V AC. Using a lower-voltage-rated fuse in a higher-voltage circuit creates a safety hazard.

Q: Are the Littelfuse 0232005 series parts (MXF20P, MXF22P, MXP) interchangeable with each other?

A: Yes. All three Littelfuse parts (0232005.MXF20P, 0232005.MXF22P, and 0232005.MXP) share identical electrical specifications: 5 A, 250 V AC, 5mm x 20mm form factor, and medium blow response time. They are mechanically and electrically interchangeable.

Q: What is the difference between the GMC-5A and the Littelfuse 0232005 series in terms of breaking capacity?

A: The GMC-5A specifies a breaking capacity of 10 kA at rated voltage, while the Littelfuse 0232005 series specifies 100 A at rated voltage. Both values are provided by the manufacturers and reflect their respective design specifications. Selection should be based on the circuit's short-circuit current requirements.

Q: Do all substitute parts require the same fuse holder as the GMC-5A?

A: Yes. All substitute parts maintain the 5mm x 20mm physical dimensions and require a compatible 5mm x 20mm fuse holder. No holder modification is necessary when substituting between listed parts.

Q: Which substitute part has the highest inventory availability?

A: The MSC-5A (OptiFuse) has the highest inventory with 5,195 units in stock, followed by 0232005.MXP (Littelfuse) with 1,343 units.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the environmental compliance requirement of the GMC-5A.

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