GMA-7A Equivalent & Substitute Parts Reference

Part Overview

The GMA-7A is a 7 A 125 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm package format manufactured by Eaton - Electronics Division. This fuse requires a compatible holder for installation and is designed for circuit protection applications requiring fast response characteristics. The part is currently active in production with 1016 pieces in new original stock inventory. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and approval certifications to ensure direct functional interchangeability in protected circuit applications.

Substiute Parts

GMA-7A

Eaton - Electronics DivisionIn Stock: 1078GMA-7A Datasheet

Current PartRFQ

GMA-7-R

Eaton - Electronics DivisionIn Stock: 778GMA-7-R Datasheet

DirectRFQ

BK/GMA-7-R

Eaton - Electronics DivisionIn Stock: 1874BK/GMA-7-R Datasheet

Parametric EquivalentRFQ

0235007.MXP

Littelfuse Inc.In Stock: 18660235007.MXP Datasheet

Parametric EquivalentRFQ

BP-GMA-7A

Eaton - Bussmann Electrical DivisionIn Stock: 1101BP-GMA-7A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GMA-7A are qualified based on the following critical parameters that must match or remain compatible:

Mandatory Matching Parameters:

• Current Rating: 7 A
• Voltage Rating - AC: 125 V
• Fuse Type: Cartridge, Glass
• Package / Case: 5mm x 20mm
• Response Time: Fast Blow
• Mounting Type: Requires Holder

Compatibility Considerations: Substitutes must maintain identical electrical protection characteristics (current and voltage ratings) and physical dimensions to ensure proper operation within existing fuse holders. Breaking capacity and melting I²t values may vary within acceptable ranges for the application category. Approval agency certifications (CSA, PSE, UL, CE, UR) confirm compliance with regional safety standards.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and are manufactured by established component suppliers (Eaton Electronics Division, Eaton Bussmann Electrical Division, and Littelfuse Inc.). Selection among these equivalents is based on the following factors:

Eaton GMA Series (GMA-7A, GMA-7-R, BK/GMA-7-R): These parts share identical manufacturer lineage and electrical specifications. BK/GMA-7-R offers the highest inventory availability (1806 pieces) and includes ROHS3 compliance certification. GMA-7-R provides CSA, PSE, and UL approvals with 724 pieces in stock.

Littelfuse 0235007.MXP: This part provides equivalent electrical performance with extended operating temperature range (-55°C to 125°C) and higher breaking capacity (10kA). It carries CE, PSE, and UL certifications and maintains 1834 pieces in inventory. DC cold resistance is slightly elevated at 0.0157 Ohms compared to Eaton parts at 0.012 Ohms.

Eaton Bussmann BP-GMA-7A: This variant from the Bussmann division maintains identical electrical ratings and 200A breaking capacity. It holds CSA, UL, and UR approvals with 1062 pieces available. Moisture sensitivity level is listed as Not Applicable.

All parts are suitable for direct substitution in applications requiring 7 A 125 V AC/DC fast-blow protection with 5mm x 20mm cartridge format.

Frequently Asked Questions (FAQ)

Q: Can GMA-7-R be used as a direct replacement for GMA-7A?

A: Yes. Both parts share identical electrical ratings (7 A, 125 V AC/DC), fuse type (cartridge glass), package dimensions (5mm x 20mm), and response characteristics (fast blow). Both require a compatible fuse holder for installation.

Q: What is the difference between BK/GMA-7-R and GMA-7-R?

A: Both parts are manufactured by Eaton and maintain identical electrical specifications and dimensions. BK/GMA-7-R carries ROHS3 compliance certification, while GMA-7-R is RoHS Compliant. Both have 200A breaking capacity and 0.012 Ohms DC cold resistance. BK/GMA-7-R has higher inventory availability (1806 vs 724 pieces).

Q: Can the Littelfuse 0235007.MXP substitute for Eaton GMA-7A?

A: Yes, for electrical protection function. The 0235007.MXP matches all critical parameters: 7 A current rating, 125 V AC voltage rating, fast-blow response, and 5mm x 20mm package. However, it has a higher breaking capacity (10kA vs 200A) and extended operating temperature range (-55°C to 125°C). DC cold resistance is 0.0157 Ohms compared to 0.012 Ohms in Eaton parts.

Q: Are all these fuses compatible with the same holder?

A: Yes. All substitute parts maintain identical 5mm x 20mm physical dimensions and require a holder designed for this cartridge format. Mechanical compatibility is ensured across all listed equivalents.

Q: What approval certifications should I verify for my application?

A: Verify that the selected substitute part carries the required regional certifications for your application. GMA-7-R and BK/GMA-7-R hold CSA, PSE, and UL approvals. The Littelfuse 0235007.MXP carries CE, PSE, and UL certifications. BP-GMA-7A holds CSA, UL, and UR approvals. Select based on your regional compliance requirements.

Q: Is there a difference in melting I²t between these parts?

A: Yes. Eaton GMA series parts (GMA-7-R, BK/GMA-7-R) have melting I²t of 150. The Littelfuse 0235007.MXP has melting I²t of 64.815. This difference reflects different thermal response characteristics but does not affect basic 7 A protection function at rated voltage.

Q: Which substitute has the best inventory availability?

A: BK/GMA-7-R has the highest inventory with 1806 pieces in stock, followed by 0235007.MXP with 1834 pieces. Both exceed the original GMA-7A inventory of 1016 pieces.