GMC-750-R Equivalent & Substitute Parts

Part Overview

The GMC-750-R is a 750 mA glass cartridge fuse rated for 250 V AC/DC operation in a 5mm x 20mm package form factor. Manufactured by Eaton - Electronics Division, this fuse cartridge requires a holder for installation and is classified as a medium blow response fuse. The part maintains Active product status with 962 pieces in current inventory. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification, enabling direct functional replacement in applications where the main part becomes unavailable or when inventory optimization is required.

Substiute Parts

GMC-750-R

Eaton - Electronics DivisionIn Stock: 1058GMC-750-R Datasheet

Current PartRFQ

BK/GMC-750-R

Eaton - Electronics DivisionIn Stock: 1277BK/GMC-750-R Datasheet

DirectRFQ

BK1/GMC-750-R

Eaton - Electronics DivisionIn Stock: 1813BK1/GMC-750-R Datasheet

Parametric EquivalentRFQ

MSC-750MA

OptiFuseIn Stock: 4531MSC-750MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GMC-750-R are classified based on strict electrical and mechanical parameter alignment:

Direct Manufacturer Equivalents (Eaton - Electronics Division): BK/GMC-750-R and BK1/GMC-750-R are functionally equivalent variants within the Eaton GMC series. These parts share identical current ratings (750 mA), voltage ratings (250 V AC), package dimensions (5mm x 20mm), response time classification (Medium Blow), and RoHS3 compliance. All three Eaton variants carry CSA, KC-MARK, and UL approvals, with BK1/GMC-750-R additionally certified to KC standards. The substitution basis is complete parametric equivalence across all critical electrical and mechanical specifications.

Cross-Manufacturer Parametric Equivalent (OptiFuse): MSC-750MA is a parametric equivalent from OptiFuse. This part matches the GMC-750-R in current rating (750 mA), voltage rating (250 V AC), fuse type (Cartridge, Glass), package dimensions (5mm x 20mm), and response time (Medium Blow). The MSC-750MA carries cULus and UL 248 certifications, confirming compliance with recognized safety standards. The primary technical difference is the breaking capacity specification (100A for MSC-750MA versus 35A for GMC-750-R) and melting I²t values (0.8669 versus 0.85), which remain within acceptable tolerance ranges for this product category. Operating temperature range (-55°C ~ 125°C) is specified for the OptiFuse part.

Parameter Comparison

Engineering Selection Recommendations

Eaton GMC Series Variants (GMC-750-R, BK/GMC-750-R, BK1/GMC-750-R): These three part numbers are direct functional equivalents within the Eaton product line. Selection among these variants is based on availability and inventory status. All three maintain Active product status and carry equivalent safety certifications (CSA, KC-MARK, UL). BK1/GMC-750-R currently has the highest inventory level (1728 pieces) compared to GMC-750-R (962 pieces) and BK/GMC-750-R (1227 pieces). For applications requiring Eaton-sourced components, any of these three variants satisfies the electrical and mechanical requirements.

OptiFuse MSC-750MA: The MSC-750MA is suitable for applications where cross-manufacturer sourcing is acceptable. This part meets all critical electrical parameters (750 mA, 250 V AC, Medium Blow response) and mechanical specifications (5mm x 20mm package). The MSC-750MA carries cULus and UL 248 certifications, confirming compliance with North American and international safety standards. The higher breaking capacity (100A versus 35A) and specified operating temperature range (-55°C ~ 125°C) provide additional performance margin in certain applications. Inventory availability for MSC-750MA is highest among all listed substitutes (4515 pieces).

Frequently Asked Questions (FAQ)

Q: Can BK/GMC-750-R, BK1/GMC-750-R, and GMC-750-R be used interchangeably?

A: Yes. These three Eaton part numbers are parametrically equivalent across all critical electrical and mechanical specifications: 750 mA current rating, 250 V AC voltage rating, Medium Blow response time, and 5mm x 20mm package dimensions. All three require a fuse holder for installation and carry equivalent safety certifications. Selection is based on availability and inventory status.

Q: Is MSC-750MA from OptiFuse a direct replacement for GMC-750-R?

A: MSC-750MA is a parametric equivalent suitable for direct replacement in applications where cross-manufacturer sourcing is acceptable. The part matches GMC-750-R in current rating (750 mA), voltage rating (250 V AC), fuse type (Cartridge, Glass), package dimensions (5mm x 20mm), and response time (Medium Blow). Both parts require a fuse holder and are RoHS3 compliant. The MSC-750MA carries cULus and UL 248 certifications, confirming compliance with recognized safety standards.

Q: What are the key differences between GMC-750-R and MSC-750MA?

A: The primary differences are manufacturer (Eaton versus OptiFuse), breaking capacity specification (35A versus 100A), melting I²t values (0.85 versus 0.8669), and approval certifications (CSA, KC-MARK, UL versus cULus, UL 248). The MSC-750MA specifies an operating temperature range of -55°C ~ 125°C, while the Eaton variants do not specify this parameter. These differences do not affect functional equivalence for standard 750 mA, 250 V AC applications.

Q: Do all substitute parts require the same fuse holder?

A: Yes. All listed substitute parts (GMC-750-R, BK/GMC-750-R, BK1/GMC-750-R, and MSC-750MA) share identical package dimensions (5mm x 20mm) and require a fuse holder for installation. Any 5mm x 20mm fuse holder compatible with the original GMC-750-R is compatible with all substitute parts listed.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. GMC-750-R, BK/GMC-750-R, BK1/GMC-750-R, and MSC-750MA are all RoHS3 compliant, confirming conformance with restriction of hazardous substances requirements.

Q: Which substitute part has the highest inventory availability?

A: MSC-750MA from OptiFuse has the highest inventory level at 4515 pieces. Among Eaton variants, BK1/GMC-750-R has 1728 pieces in stock, followed by BK/GMC-750-R with 1227 pieces and GMC-750-R with 962 pieces.