GMA-8-R Equivalent & Substitute Parts Reference

Part Overview

The GMA-8-R is a fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division, rated for 8 A at 125 V AC/DC. This component is designed for use in fuse holders and provides overcurrent protection in electrical circuits. The part is currently active in production with full inventory availability. Substitute parts are identified based on identical electrical ratings, mechanical dimensions, and performance characteristics to ensure direct functional equivalence in circuit protection applications.

Substiute Parts

GMA-8-R

Eaton - Electronics DivisionIn Stock: 796GMA-8-R Datasheet

Current PartRFQ

BK/GMA-8-R

Eaton - Electronics DivisionIn Stock: 3305BK/GMA-8-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GMA-8-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 8 A (exact match required)
• Voltage Rating: 125 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Physical Dimensions: 5mm x 20mm (exact match required)
• Breaking Capacity: 200 A @ rated voltage (exact match required)
• Melting I²t: 280 (exact match required)
• Regulatory Approvals: CSA, PSE, UL (minimum requirement)

The substitute part BK/GMA-8-R meets all these criteria and is therefore a direct functional equivalent. Both parts belong to the GMA series and share identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both GMA-8-R and BK/GMA-8-R are active production components manufactured by Eaton - Electronics Division with full regulatory compliance (CSA, PSE, UL certifications). The parts are electrically and mechanically identical across all specified parameters. Selection between these parts may be based on inventory availability: GMA-8-R has 688 pieces in stock, while BK/GMA-8-R has 3,271 pieces in stock. Both parts meet RoHS compliance requirements (RoHS Compliant and ROHS3 Compliant respectively). The BK/GMA-8-R variant includes REACH Unaffected status documentation. For applications requiring immediate availability or higher stock levels, BK/GMA-8-R is the preferred selection. For applications with existing supply chain documentation referencing GMA-8-R, either part provides equivalent performance.

Frequently Asked Questions (FAQ)

Q: Can BK/GMA-8-R be used as a direct replacement for GMA-8-R in existing circuits?

A: Yes. Both parts are identical in current rating (8 A), voltage rating (125 V AC), fuse type (cartridge glass), response time (fast blow), physical dimensions (5mm x 20mm), breaking capacity (200 A), and melting I²t (280). They are functionally equivalent and interchangeable in any circuit designed for GMA-8-R.

Q: What does the "BK/" prefix in BK/GMA-8-R indicate?

A: The BK/ prefix is a manufacturer designation variant within the GMA series. It does not affect electrical or mechanical performance. Both GMA-8-R and BK/GMA-8-R are produced by Eaton - Electronics Division and meet identical specifications.

Q: Are there any differences in regulatory compliance between GMA-8-R and BK/GMA-8-R?

A: Both parts hold CSA, PSE, and UL approvals. GMA-8-R is RoHS Compliant, while BK/GMA-8-R is ROHS3 Compliant. Both meet current environmental and safety standards. BK/GMA-8-R includes REACH Unaffected status.

Q: What is the significance of the 5mm x 20mm package dimension?

A: The 5mm x 20mm dimension specifies the physical size of the cartridge fuse. This dimension determines compatibility with standard fuse holders designed for this package size. Both substitute parts share this identical dimension and are compatible with the same holder types.

Q: What does "Fast Blow" response time mean?

A: Fast Blow indicates the fuse will open quickly when current exceeds the 8 A rating. This response characteristic is identical in both GMA-8-R and BK/GMA-8-R and is suitable for circuits requiring rapid overcurrent protection.

Q: Can these fuses be used in DC applications?

A: Yes. Both parts are rated for 125 V AC/DC operation. The DC Cold Resistance specification (0.009 Ohms) applies to both parts and confirms DC compatibility.

Q: What is the Breaking Capacity specification?

A: Breaking Capacity of 200 A at rated voltage indicates the maximum fault current the fuse can safely interrupt. Both GMA-8-R and BK/GMA-8-R have identical breaking capacity and are suitable for circuits with fault currents up to 200 A.

Q: Does the difference in inventory levels affect part selection?

A: Inventory levels do not affect electrical or mechanical compatibility. Selection may be influenced by supply chain requirements or lead time considerations. BK/GMA-8-R has higher stock availability (3,271 pieces vs. 688 pieces).