Equivalent & Substitute Parts for GMA-2A Glass Cartridge Fuse

Part Overview

The GMA-2A is a 2 A, 250 V AC/DC glass cartridge fuse in 5mm x 20mm form factor manufactured by Eaton - Electronics Division. This fast-blow fuse cartridge requires a compatible holder for installation and is designed for general-purpose circuit protection applications. The part is active in production with 990 pieces currently in stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional characteristics to ensure direct interchangeability in circuit protection applications.

Key Parameters

Parameter	GMA-2A Specification
Current Rating	2 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
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 GMA-2A is determined by the following critical parameters:

Primary Matching Criteria:

Current Rating: 2 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: Fast Blow (exact match required)
Mounting Type: Requires Holder (exact match required)

All identified substitute parts meet these primary criteria. Secondary parameters including breaking capacity, melting I²t, DC cold resistance, and approval agencies vary among substitutes but do not prevent functional equivalence within the specified electrical and mechanical constraints.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Response Time	Package / Case	Breaking Capacity @ Rated Voltage (A)	Melting I²t	DC Cold Resistance (Ohms)	Inventory (Pcs)
GMA-2A	Eaton - Electronics Division	2	250	Fast Blow	5mm x 20mm	100	3.1	0.066	990
GMA-2-R	Eaton - Electronics Division	2	250	Fast Blow	5mm x 20mm	100	3.1	0.066	1062
BK/GDB-2A	Eaton - Electronics Division	2	250	Fast Blow	5mm x 20mm	35	4.2	0.043	2820
BK/S500-2-R	Eaton - Electronics Division	2	250	Fast Blow	5mm x 20mm	35	4.2	0.043	4260
BK1/S500-2-R	Eaton - Electronics Division	2	250	Fast Blow	5mm x 20mm	35	4.2	0.043	1480
GDB-2A	Eaton - Electronics Division	2	250	Fast Blow	5mm x 20mm	35	4.2	0.043	981
S500-2-R	Eaton - Electronics Division	2	250	Fast Blow	5mm x 20mm	35	4.2	0.043	912
0034.1519	SCHURTER Inc.	2	250	Fast Blow	5mm x 20mm	35	5.28	Not specified	20622
0034.1519.G	SCHURTER Inc.	2	250	Fast Blow	5mm x 20mm	35	5.28	Not specified	821
0034.1519.TR	SCHURTER Inc.	2	250	Fast Blow	5mm x 20mm	35	5.28	Not specified	20622
0034.3877	SCHURTER Inc.	2	250	Fast Blow	5mm x 20mm	100	2.93	Not specified	1840

Engineering Selection Recommendations

Eaton GMA Series (GMA-2A, GMA-2-R): These parts are direct equivalents with identical electrical and mechanical specifications. Both feature 100 A breaking capacity and 3.1 melting I²t. GMA-2-R offers higher inventory availability (1062 pcs) compared to GMA-2A (990 pcs). Both are ROHS3 compliant and carry CSA, PSE, and UL approvals.

Eaton GDB Series (BK/GDB-2A, GDB-2A): These parts meet all primary matching criteria with reduced breaking capacity (35 A) and increased melting I²t (4.2). GDB-2A carries VDE and UR approvals. BK/GDB-2A adds UL certification. Both are ROHS3 compliant. BK/GDB-2A provides significantly higher inventory (2820 pcs).

Eaton S500 Series (BK/S500-2-R, BK1/S500-2-R, S500-2-R): All S500 variants meet primary matching criteria with 35 A breaking capacity and 4.2 melting I²t. BK/S500-2-R offers the highest inventory among Eaton substitutes (4260 pcs) and carries the broadest approval agency coverage: BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE. All are ROHS3 compliant.

SCHURTER FSF 5x20 Series (0034.1519, 0034.1519.G, 0034.1519.TR): These parts meet all primary matching criteria with 35 A breaking capacity and 5.28 melting I²t. Operating temperature range is -55°C to 125°C. 0034.1519 provides the highest inventory availability (20622 pcs). 0034.1519.G carries the most comprehensive approvals: CCC, CE, CSA, cURus, UKCA, UL, and VDE. All are ROHS3 compliant.

SCHURTER FSK 5x20 Series (0034.3877): This part meets all primary matching criteria with 100 A breaking capacity and 2.93 melting I²t. Operating temperature range is -40°C to 85°C. Carries cULus approval. ROHS3 compliant. Inventory: 1840 pcs.

Frequently Asked Questions (FAQ)

Q: Can GMA-2A be directly replaced with GMA-2-R?

A: Yes. Both parts are identical in current rating (2 A), voltage rating (250 V AC), response time (fast blow), package dimensions (5mm x 20mm), and breaking capacity (100 A). Both require a compatible fuse holder for installation.

Q: What is the difference between GMA-2A and GDB-2A?

A: Both parts share identical current rating (2 A), voltage rating (250 V AC), response time (fast blow), and package dimensions (5mm x 20mm). The primary differences are breaking capacity (GMA-2A: 100 A vs. GDB-2A: 35 A) and melting I²t (GMA-2A: 3.1 vs. GDB-2A: 4.2). Approval agencies also differ: GMA-2A carries CSA, PSE, and UL; GDB-2A carries VDE and UR.

Q: Are SCHURTER 0034.1519 and Eaton GMA-2A interchangeable?

A: Yes. Both parts meet all primary matching criteria: 2 A current rating, 250 V AC voltage rating, fast-blow response, and 5mm x 20mm package dimensions. Both require a compatible fuse holder. Secondary parameters differ: breaking capacity (Eaton: 100 A vs. SCHURTER: 35 A) and melting I²t (Eaton: 3.1 vs. SCHURTER: 5.28).

Q: What does "Requires Holder" mean for the GMA-2A?

A: The GMA-2A is a cartridge fuse that must be installed in a compatible fuse holder. The fuse itself does not have integrated mounting hardware. The holder provides electrical contact and mechanical retention for the 5mm x 20mm cartridge.

Q: Can I use 0034.3877 as a substitute for GMA-2A?

A: Yes, from an electrical and mechanical standpoint. Both are 2 A, 250 V AC fast-blow fuses in 5mm x 20mm packages. However, 0034.3877 has a higher breaking capacity (100 A) and lower melting I²t (2.93 vs. 3.1), and operates at a different temperature range (-40°C to 85°C vs. unspecified for GMA-2A). Approval agencies differ: 0034.3877 carries only cULus certification.

Q: Which substitute offers the best inventory availability?

A: SCHURTER 0034.1519 provides the highest inventory with 20622 pieces in stock, followed by Eaton BK/S500-2-R with 4260 pieces.

Q: Are all substitutes ROHS3 compliant?

A: All identified substitutes are ROHS3 compliant except where compliance status is not specified in the provided data.

Q: What approval agencies are common across all substitutes?

A: No single approval agency appears across all substitute parts. However, VDE and CSA approvals are present in multiple substitute options. Specific application requirements should determine which approval agencies are necessary for your circuit protection design.

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