Equivalent & Substitute Parts for GMA-63MA Glass Fuse Cartridge

Part Overview

The GMA-63MA is a 63 mA, 250 V AC/DC glass fuse cartridge manufactured by Eaton - Electronics Division. This fast-blow fuse cartridge operates in a 5mm x 20mm form factor and requires a compatible holder for installation. The part is currently in active inventory status with 766 pieces available. Glass fuse cartridges of this specification are essential protective components in electrical circuits where precise current limitation and overcurrent protection are required. Equivalent substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and approval certifications.

Key Parameters

Parameter	Value
Current Rating	63 mA
Voltage Rating - AC	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Fast Blow
Breaking Capacity @ Rated Voltage	35A
Mounting Type	Requires Holder
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Substitute Part Grouping Explanation

Substitute parts for the GMA-63MA are determined by strict equivalence across the following critical parameters:

Electrical Equivalence:

Current Rating: 63 mA (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Response Time: Fast Blow (exact match required)
Breaking Capacity @ Rated Voltage: 35A (exact match required)

Mechanical Equivalence:

Package / Case: 5mm x 20mm (exact match required)
Mounting Type: Requires Holder (exact match required)
Fuse Type: Cartridge, Glass (exact match required)

All substitute parts listed below meet these criteria. Variations in secondary parameters such as DC Cold Resistance, Melting I²t, and approval certifications do not affect functional substitutability within the specified electrical and mechanical constraints.

Parameter Comparison

Part Number	Manufacturer	Current Rating (mA)	Voltage Rating - AC (V)	Response Time	Package / Case	Breaking Capacity @ Rated Voltage (A)	Melting I²t	DC Cold Resistance (Ohms)	Inventory (Pcs)
GMA-63MA	Eaton - Electronics Division	63	250	Fast Blow	5mm x 20mm	35	0.00024	15.75	766
GMA-63-R	Eaton - Electronics Division	63	250	Fast Blow	5mm x 20mm	35	0.00024	15.75	1054
BK/GDB-63MA	Eaton - Electronics Division	63	250	Fast Blow	5mm x 20mm	35	0.00057	12.5	708
BK/GMA-63-R	Eaton - Electronics Division	63	250	Fast Blow	5mm x 20mm	35	0.00024	15.75	881
BK/S500-63-R	Eaton - Electronics Division	63	250	Fast Blow	5mm x 20mm	35	0.00057	125	1017
BK1/GMA-63-R	Eaton - Electronics Division	63	250	Fast Blow	5mm x 20mm	35	0.00024	15.75	1070
BK1/S500-63-R	Eaton - Electronics Division	63	250	Fast Blow	5mm x 20mm	35	0.00057	12.5	925
GDB-63MA	Eaton - Electronics Division	63	250	Fast Blow	5mm x 20mm	35	0.00057	12.5	1108
S500-63-R	Eaton - Electronics Division	63	250	Fast Blow	5mm x 20mm	35	0.00057	125	1063
0034.1530	SCHURTER Inc.	63	250	Fast Blow	5mm x 20mm	35	0.000278	Not Specified	2249
0217.063HXP	Littelfuse Inc.	63	250	Fast Blow	5mm x 20mm	35	0.00056	10.45	1164

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the GMA-63MA based on matching electrical and mechanical specifications. Selection among these alternatives should be based on the following factors:

Approval Certifications: The GMA-63MA carries CSA, PSE, and UL approvals. Substitute parts with identical or broader approval coverage include GMA-63-R, BK/GMA-63-R, BK1/GMA-63-R (CSA, PSE, UL), 0217.063HXP (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE), and 0034.1530 (CCC, cURus, VDE). Parts without specified approval agencies (BK/GDB-63MA, BK/S500-63-R, GDB-63MA, S500-63-R) are suitable for applications where specific certifications are not mandated.

RoHS Compliance: All substitute parts are RoHS Compliant or ROHS3 Compliant. The GMA-63MA is RoHS Compliant. Parts designated ROHS3 Compliant (BK/GMA-63-R, BK/S500-63-R, S500-63-R, 0034.1530, 0217.063HXP) meet current environmental standards.

Inventory Availability: The 0034.1530 (SCHURTER Inc.) offers the highest inventory level at 2249 pieces. Eaton - Electronics Division alternatives range from 708 to 1108 pieces. Littelfuse Inc. 0217.063HXP provides 1164 pieces.

Operating Temperature Range: The GMA-63MA does not specify an operating temperature range. Substitute parts with specified operating temperature ranges include 0034.1530 (-55°C ~ 125°C) and 0217.063HXP (-55°C ~ 125°C), which provide extended temperature performance documentation.

Frequently Asked Questions (FAQ)

Q: Can I substitute the GMA-63MA with any of the listed parts?

A: Yes. All listed parts meet the critical electrical and mechanical parameters: 63 mA current rating, 250 V AC voltage rating, fast-blow response, 35A breaking capacity, and 5mm x 20mm form factor. Physical installation and electrical performance are equivalent.

Q: What is the difference between GMA-63MA and GMA-63-R?

A: Both parts are from the Eaton GMA series with identical electrical and mechanical specifications. GMA-63-R is available in bulk packaging with higher inventory (1054 vs. 766 pieces). Both carry CSA, PSE, and UL approvals.

Q: Why do some substitute parts have different DC Cold Resistance values?

A: DC Cold Resistance is a secondary parameter that does not affect substitutability for this fuse category. Variations (10.45 to 125 Ohms) reflect different internal construction designs across manufacturers and series, but all parts maintain the same current rating and response characteristics.

Q: Are Littelfuse and SCHURTER parts direct substitutes for Eaton parts?

A: Yes. The 0217.063HXP (Littelfuse Inc.) and 0034.1530 (SCHURTER Inc.) meet all critical electrical and mechanical equivalence criteria. Both carry broader international approval certifications (CCC, CE, VDE) and specified operating temperature ranges (-55°C ~ 125°C).

Q: What does "Requires Holder" mean?

A: All listed parts are cartridge fuses that must be installed in a compatible fuse holder. The 5mm x 20mm form factor is standard across all substitute parts, ensuring mechanical compatibility with existing holders designed for this size.

Q: Which substitute part should I choose if my application requires specific certifications?

A: For CSA, PSE, and UL certifications matching the GMA-63MA, select GMA-63-R, BK/GMA-63-R, or BK1/GMA-63-R. For broader international certifications, select 0217.063HXP (Littelfuse Inc.) or 0034.1530 (SCHURTER Inc.).

Q: Is there a difference in response time between substitute parts?

A: No. All listed substitute parts are fast-blow fuses with identical response characteristics. Melting I²t values vary slightly (0.00024 to 0.000278) due to manufacturing differences, but these variations do not affect functional performance within the specified 63 mA, 250 V rating.

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