GMC-1.6A Glass Fuse Cartridge Equivalent & Substitute Parts

Part Overview

The GMC-1.6A is a 1.6 ampere glass fuse cartridge rated for 250 V AC/DC operation in a 5mm x 20mm form factor, manufactured by Eaton - Electronics Division. This cartridge fuse requires a compatible holder for installation and is designed for medium-blow response applications. The part is active in production with 762 pieces in current inventory stock.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across manufacturers. Alternative sources become necessary for supply chain continuity, extended lead time mitigation, or regional availability requirements while preserving circuit protection characteristics.

Key Parameters

Parameter	Value
Current Rating	1.6 A
Voltage Rating - AC	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Medium Blow
Breaking Capacity @ Rated Voltage	100A
Mounting Type	Requires Holder
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Substitute Part Grouping Explanation

Substitution eligibility for the GMC-1.6A is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

Current Rating: 1.6 A (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Response Time: Medium Blow (exact match required)
Breaking Capacity @ Rated Voltage: 100A (exact match required)
Mounting Type: Requires Holder (exact match required)

All identified substitute parts maintain these critical electrical and mechanical parameters. Variations in secondary parameters such as melting I²t, DC cold resistance, operating temperature range, and approval agencies do not disqualify substitution when primary parameters align. Substitute parts are sourced from Eaton - Electronics Division, Littelfuse Inc., and OptiFuse, all established manufacturers in the fuse cartridge category.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage Rating - AC (V)	Fuse Type	Package / Case	Response Time	Breaking Capacity @ Rated Voltage (A)	DC Cold Resistance (Ohms)	Melting I²t	RoHS Status	Product Status
GMC-1.6A	Eaton - Electronics Division	1.6	250	Cartridge, Glass	5mm x 20mm	Medium Blow	100	0.067	5.8	ROHS3 Compliant	Active
GMC-1.6-R	Eaton - Electronics Division	1.6	250	Cartridge, Glass	5mm x 20mm	Medium Blow	100	0.067	5.8	ROHS3 Compliant	Active
BK/GMC-1.6-R	Eaton - Electronics Division	1.6	250	Cartridge, Glass	5mm x 20mm	Medium Blow	100	0.067	5.8	ROHS3 Compliant	Active
BK1/GMC-1.6-R	Eaton - Electronics Division	1.6	250	Cartridge, Glass	5mm x 20mm	Medium Blow	100	0.067	5.8	ROHS3 Compliant	Active
023201.6MXP	Littelfuse Inc.	1.6	250	Cartridge, Glass	5mm x 20mm	Medium Blow	100	0.0537	6.96	ROHS3 Compliant	Active
023201.6MXF5P	Littelfuse Inc.	1.6	250	Cartridge, Glass	5mm x 20mm	Medium Blow	100	0.0537	6.96	ROHS3 Compliant	Active
023401.6MXBP	Littelfuse Inc.	1.6	250	Cartridge, Glass	5mm x 20mm	Medium Blow	100	0.0884	6.14	ROHS3 Compliant	Active
023401.6MXP	Littelfuse Inc.	1.6	250	Cartridge, Glass	5mm x 20mm	Medium Blow	100	0.0884	6.14	ROHS3 Compliant	Active
MSC-1.6A	OptiFuse	1.6	250	Cartridge, Glass	5mm x 20mm	Medium Blow	100	Not Specified	7.795	ROHS3 Compliant	Active

Engineering Selection Recommendations

All identified substitute parts maintain active product status and ROHS3 compliance. Selection among equivalent parts is based on approval agency certifications and regional compliance requirements:

Eaton - Electronics Division variants (GMC-1.6-R, BK/GMC-1.6-R, BK1/GMC-1.6-R): These parts carry CSA, KC-MARK, MITI, and UL approvals. The BK1/GMC-1.6-R variant has the highest inventory availability at 9,060 pieces and carries CSA and UL certifications.

Littelfuse Inc. variants (023201.6MXP, 023201.6MXF5P, 023401.6MXBP, 023401.6MXP): These parts carry CE, KC, PSE, CSA, K-MARK, and UL approvals with extended operating temperature range of -55°C to 125°C. The 023401.6MXP variant has the highest inventory at 1,851 pieces.

OptiFuse MSC-1.6A: This part carries cULus and UL 248 certifications with extended operating temperature range of -55°C to 125°C and 1,610 pieces in inventory.

Selection should prioritize parts with certifications matching the end-application regulatory requirements and geographic deployment region.

Frequently Asked Questions (FAQ)

Q: Can GMC-1.6A be directly replaced with GMC-1.6-R?

A: Yes. Both parts are manufactured by Eaton - Electronics Division and maintain identical electrical and mechanical parameters: 1.6 A current rating, 250 V AC voltage rating, medium-blow response, 5mm x 20mm package, and 100A breaking capacity. Both require a compatible fuse holder for installation.

Q: Are Littelfuse 232 and 234 series fuses interchangeable with Eaton GMC series?

A: Yes, within the specified current and voltage ratings. The 023201.6MXP, 023201.6MXF5P (232 series) and 023401.6MXBP, 023401.6MXP (234 series) maintain the same 1.6 A, 250 V, 5mm x 20mm specifications. These parts fit the same holder and provide equivalent circuit protection. Differences in melting I²t and DC cold resistance do not affect substitution eligibility when primary electrical parameters match.

Q: What is the difference between 023401.6MXBP and 023401.6MXP?

A: Both are Littelfuse 234 series parts with identical electrical ratings and mechanical dimensions. The primary difference is packaging designation. Both maintain 1.6 A current rating, 250 V voltage rating, medium-blow response, and 100A breaking capacity. Selection between these variants is based on supplier availability and packaging requirements.

Q: Does the OptiFuse MSC-1.6A require a different holder than the Eaton GMC-1.6A?

A: No. The MSC-1.6A maintains the same 5mm x 20mm form factor and requires the same holder type as the GMC-1.6A. Both are cartridge glass fuses with identical mechanical mounting requirements.

Q: Which substitute part has the best availability?

A: BK1/GMC-1.6-R from Eaton - Electronics Division has the highest inventory at 9,060 pieces. This variant maintains identical electrical and mechanical parameters to the GMC-1.6A and carries CSA and UL certifications.

Q: Are there operating temperature differences between substitute parts?

A: Yes. Eaton GMC series parts do not specify an operating temperature range. Littelfuse 232 and 234 series parts and OptiFuse MSC-1.6A specify -55°C to 125°C operating temperature range. For applications requiring extended temperature operation, Littelfuse or OptiFuse variants are appropriate selections.

Q: Can these fuses be used in both AC and DC circuits?

A: Yes. All identified parts are rated for 250 V AC/DC operation. The 250 V AC rating applies to alternating current circuits, and the fuses are also suitable for direct current applications at the specified voltage.

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