GMA-315MA Equivalent & Substitute Parts Reference

Part Overview

The GMA-315MA is a 315 mA, 250 V AC/DC glass cartridge fuse in 5mm x 20mm package format manufactured by Eaton - Electronics Division. This fast-blow fuse cartridge requires a holder for installation and is designed for circuit protection applications requiring precise current interruption at 315 mA nominal rating.

The GMA-315MA series maintains active product status with 1000 pieces in current inventory. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and approval certifications to ensure direct functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Specification
Current Rating	315 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

Substitution eligibility for the GMA-315MA is determined by the following mandatory parameters:

Electrical Equivalence Requirements:

Current Rating: 315 mA (exact match)
Voltage Rating - AC: 250 V (exact match)
Response Time: Fast Blow (exact match)
Breaking Capacity @ Rated Voltage: 35A (exact match)

Mechanical Compatibility Requirements:

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

Compliance Requirements:

Product Status: Active
RoHS Status: RoHS Compliant or ROHS3 Compliant

All substitute parts listed below satisfy these mandatory criteria. Variations in secondary parameters such as Melting I²t, DC Cold Resistance, and specific approval agencies do not disqualify substitution when primary electrical and mechanical parameters match exactly.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating (Amps)	Voltage Rating - AC	Response Time	Package / Case	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Inventory (Pcs)
GMA-315MA	Eaton - Electronics Division	GMA	315 mA	250 V	Fast Blow	5mm x 20mm	35A	0.019	0.839	1000
GMA-315-R	Eaton - Electronics Division	GMA	315 mA	250 V	Fast Blow	5mm x 20mm	35A	0.019	0.839	913
BK/GDB-315MA	Eaton - Electronics Division	GDB	315 mA	250 V	Fast Blow	5mm x 20mm	35A	0.58	3.1	1042
BK/GMA-315-R	Eaton - Electronics Division	GMA	315 mA	250 V	Fast Blow	5mm x 20mm	35A	0.019	0.839	4682
BK/S500-315-R	Eaton - Electronics Division	S500	315 mA	250 V	Fast Blow	5mm x 20mm	35A	0.58	3.1	1948
BK1/GMA-315-R	Eaton - Electronics Division	GMA	315 mA	250 V	Fast Blow	5mm x 20mm	35A	0.019	0.839	749
BK1/S500-315-R	Eaton - Electronics Division	S500	315 mA	250 V	Fast Blow	5mm x 20mm	35A	0.58	3.1	1924
GDB-315MA	Eaton - Electronics Division	GDB	315 mA	250 V	Fast Blow	5mm x 20mm	35A	0.58	3.1	661
S500-315-R	Eaton - Electronics Division	S500	315 mA	250 V	Fast Blow	5mm x 20mm	35A	0.58	3.1	843
0034.1511	SCHURTER Inc.	FSF 5x20	315 mA	250 V	Fast Blow	5mm x 20mm	35A	0.0367	Not Specified	1700
0217.315HXP	Littelfuse Inc.	217	315 mA	250 V	Fast Blow	5mm x 20mm	35A	0.11	0.88	1078

Engineering Selection Recommendations

Eaton GMA Series (Low Melting I²t): GMA-315-R, BK/GMA-315-R, and BK1/GMA-315-R are direct series equivalents with Melting I²t of 0.019. These parts maintain identical electrical response characteristics to the GMA-315MA and carry CSA, PSE, and UL certifications. BK/GMA-315-R offers the highest inventory availability at 4682 pieces.

Eaton GDB Series (Higher Melting I²t): BK/GDB-315MA and GDB-315MA provide functional substitution with elevated Melting I²t of 0.58, indicating slower thermal response. These parts carry UL and VDE certifications. Selection of GDB variants should be based on circuit protection requirements where extended thermal time constant is acceptable.

Eaton S500 Series (Higher Melting I²t, Extended Certifications): BK/S500-315-R, BK1/S500-315-R, and S500-315-R offer Melting I²t of 0.58 with expanded international certifications including BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE. These parts are suitable for applications requiring broader global compliance documentation.

SCHURTER 0034.1511 (FSF 5x20 Series): This SCHURTER Inc. part provides substitution with Melting I²t of 0.0367 and operating temperature range of -55°C to 125°C. Certifications include CCC, cURus, and VDE. Selection is appropriate for temperature-sensitive applications.

Littelfuse 0217.315HXP (217 Series): The Littelfuse cartridge fuse offers Melting I²t of 0.11 with comprehensive certifications including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. Operating temperature range is -55°C to 125°C. This part is suitable for applications requiring extensive international compliance coverage.

All listed substitutes maintain active product status and RoHS compliance. Selection among equivalent parts should be based on inventory availability, specific certification requirements, and thermal response characteristics appropriate to the target application.

Frequently Asked Questions (FAQ)

Q: Can GMA-315MA be directly replaced with BK/GMA-315-R?

A: Yes. Both parts share identical electrical specifications (315 mA, 250 V AC, Fast Blow response), mechanical dimensions (5mm x 20mm), and Melting I²t (0.019). Both require a holder for installation and carry CSA, PSE, and UL certifications. Direct substitution is supported.

Q: What is the difference between GMA series and S500 series substitutes?

A: The primary difference is Melting I²t: GMA series parts have Melting I²t of 0.019, while S500 series parts have Melting I²t of 0.58. This indicates S500 series fuses have a slower thermal response curve. Both series maintain identical current rating (315 mA), voltage rating (250 V), and package dimensions (5mm x 20mm). Selection depends on circuit protection requirements for thermal time constant.

Q: Are SCHURTER and Littelfuse parts fully compatible with Eaton GMA-315MA?

A: SCHURTER 0034.1511 and Littelfuse 0217.315HXP are parametric equivalents meeting all mandatory electrical and mechanical specifications: 315 mA current rating, 250 V voltage rating, Fast Blow response, 5mm x 20mm package, and 35A breaking capacity. Both require holder installation. Compatibility is confirmed for direct substitution in circuit protection applications. Differences in Melting I²t and certifications should be evaluated against specific application requirements.

Q: Does package format differ among substitute parts?

A: No. All substitute parts listed maintain identical package format: 5mm x 20mm cartridge glass fuse requiring holder installation. Mechanical interchangeability is confirmed across all listed parts.

Q: Which substitute part offers the highest inventory availability?

A: BK/GMA-315-R from Eaton - Electronics Division offers the highest inventory at 4682 pieces. This part is a direct GMA series equivalent with identical Melting I²t (0.019) and electrical specifications to the GMA-315MA.

Q: What certifications are common across all substitute parts?

A: All substitute parts carry CSA and VDE certifications. UL certification is present in most Eaton and Littelfuse parts. CCC certification is present in SCHURTER, Littelfuse, and select Eaton S500 series parts. Specific certification requirements for target applications should be verified against individual part documentation.

Q: Can GDB series parts be used in applications designed for GMA series?

A: GDB series parts (BK/GDB-315MA, GDB-315MA) are parametric equivalents with matching electrical ratings and package dimensions. However, GDB series has Melting I²t of 0.58 compared to GMA series Melting I²t of 0.019. This represents a significantly slower thermal response. Substitution is mechanically and electrically valid but should be confirmed against circuit protection timing requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message