GMA-315-R Equivalent & Substitute Parts

Part Overview

The GMA-315-R is a 315 mA fast-blow glass cartridge fuse rated for 250 V AC/DC operation in a 5mm x 20mm package. Manufactured by Eaton - Electronics Division, this component is classified as Active product status and requires a fuse holder for installation. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and approval certifications to ensure direct functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	315 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	35A
Mounting Type	Requires Holder
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitute parts for the GMA-315-R are grouped into two categories based on parametric equivalence:

Direct Manufacturer Equivalents (Eaton - Electronics Division): These parts share identical electrical specifications with the GMA-315-R: 315 mA current rating, 250 V AC voltage rating, fast-blow response, 5mm x 20mm package dimensions, and 35A breaking capacity. Parts in this group include BK/GMA-315-R, BK/GDB-315MA, BK/S500-315-R, BK1/S500-315-R, GDB-315MA, and S500-315-R. Variations exist in melting I²t values and DC cold resistance, which reflect different thermal response characteristics within the fast-blow classification.

Cross-Manufacturer Parametric Equivalents: These parts are manufactured by SCHURTER Inc. (0034.1511) and Littelfuse Inc. (0217.315HXP, 0217.315MXP, 0217.315TXP) and match all critical electrical and mechanical parameters: 315 mA current rating, 250 V AC voltage rating, fast-blow response, 5mm x 20mm package, and 35A breaking capacity. Differences in melting I²t and DC cold resistance reflect manufacturer-specific design approaches while maintaining functional equivalence.

Key Parameters Determining Substitution:

Current Rating: 315 mA (exact match required)
Voltage Rating: 250 V AC (exact match required)
Package Dimensions: 5mm x 20mm (exact match required)
Response Type: Fast Blow (exact match required)
Breaking Capacity: 35A (exact match required)
Fuse Type: Cartridge, Glass (exact match required)

Parameter Comparison

Part Number	Manufacturer	Current Rating (mA)	Voltage Rating (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ohms)	RoHS Status
GMA-315-R	Eaton	315	250	Fast Blow	5x20mm	35	0.019	0.839	RoHS Compliant
BK/GMA-315-R	Eaton	315	250	Fast Blow	5x20mm	35	0.019	0.839	ROHS3 Compliant
BK/GDB-315MA	Eaton	315	250	Fast Blow	5x20mm	35	0.58	3.1	RoHS Compliant
BK/S500-315-R	Eaton	315	250	Fast Blow	5x20mm	35	0.58	3.1	ROHS3 Compliant
BK1/S500-315-R	Eaton	315	250	Fast Blow	5x20mm	35	0.58	3.1	ROHS3 Compliant
GDB-315MA	Eaton	315	250	Fast Blow	5x20mm	35	0.58	3.1	RoHS Compliant
S500-315-R	Eaton	315	250	Fast Blow	5x20mm	35	0.58	3.1	ROHS3 Compliant
0034.1511	SCHURTER Inc.	315	250	Fast Blow	5x20mm	35	0.0367	Not Specified	ROHS3 Compliant
0217.315HXP	Littelfuse Inc.	315	250	Fast Blow	5x20mm	35	0.11	0.88	ROHS3 Compliant
0217.315MXP	Littelfuse Inc.	315	250	Fast Blow	5x20mm	35	0.11	0.88	ROHS3 Compliant
0217.315TXP	Littelfuse Inc.	315	250	Fast Blow	5x20mm	35	0.11	0.88	ROHS3 Compliant

Engineering Selection Recommendations

Eaton Direct Equivalents: BK/GMA-315-R is the direct equivalent to GMA-315-R with identical electrical and thermal characteristics. Both GMA and GDB series from Eaton (BK/GDB-315MA, GDB-315MA) and S500 series (BK/S500-315-R, BK1/S500-315-R, S500-315-R) are functionally equivalent with higher melting I²t values (0.58 versus 0.019), indicating slightly slower thermal response within the fast-blow classification. All Eaton parts carry Active product status and hold CSA, UL, and VDE certifications.

Cross-Manufacturer Alternatives: SCHURTER 0034.1511 (FSF 5x20 series) operates across -55°C to 125°C and holds CCC, cURus, and VDE approvals. Littelfuse 0217.315HXP, 0217.315MXP, and 0217.315TXP (217 series) operate across -55°C to 125°C with comprehensive certifications including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. All cross-manufacturer parts are ROHS3 compliant and REACH unaffected.

Selection Basis: Component selection should be based on: (1) matching current and voltage ratings, (2) identical package dimensions, (3) required approval certifications for the target application, and (4) operating temperature range compatibility. All listed substitutes meet these criteria and are suitable for direct replacement in 315 mA, 250 V AC/DC circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can BK/GDB-315MA replace GMA-315-R directly? A: Yes. Both parts share identical current rating (315 mA), voltage rating (250 V AC), response type (fast-blow), package dimensions (5mm x 20mm), and breaking capacity (35A). The difference in melting I²t (0.58 versus 0.019) reflects thermal response variation within the fast-blow classification but does not prevent direct substitution.

Q: What is the difference between Eaton GMA and GDB series fuses? A: Both series are fast-blow glass cartridge fuses with identical electrical ratings and package dimensions. The GDB series exhibits higher melting I²t values (0.58 versus 0.019 for GMA), indicating different thermal response characteristics. Both are functionally equivalent for 315 mA, 250 V applications.

Q: Are Littelfuse 0217.315HXP, 0217.315MXP, and 0217.315TXP interchangeable? A: Yes. All three Littelfuse parts share identical electrical specifications: 315 mA current rating, 250 V AC voltage rating, fast-blow response, 5mm x 20mm package, and 35A breaking capacity. Differences in melting I²t and DC cold resistance are within manufacturer design tolerances for the fast-blow classification.

Q: What certifications are required for my application? A: Certification requirements depend on the target market and application. GMA-315-R holds CSA, PSE, and UL approvals. Eaton S500 series parts hold BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE certifications. Littelfuse 217 series parts hold CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE certifications. Select the substitute part whose certifications match your application requirements.

Q: Can I use a substitute fuse with different melting I²t? A: Melting I²t differences reflect thermal response variations within the fast-blow classification. All listed substitutes maintain the same response type (fast-blow) and breaking capacity (35A). Substitution is valid provided current rating, voltage rating, package dimensions, and response type remain identical.

Q: What is the operating temperature range for these fuses? A: GMA-315-R does not specify an operating temperature range. SCHURTER 0034.1511 and Littelfuse 217 series parts operate across -55°C to 125°C. Eaton parts do not specify operating temperature ranges. Verify temperature compatibility with your application requirements before substitution.

Q: Are all substitute parts RoHS compliant? A: Yes. GMA-315-R is RoHS Compliant. All substitute parts are either RoHS Compliant or ROHS3 Compliant. All Littelfuse and SCHURTER parts are ROHS3 Compliant and REACH unaffected.

Q: What is the difference between 5mm x 20mm and other fuse package sizes? A: The 5mm x 20mm package is a standard cartridge fuse dimension. All listed parts use this identical package size and are mechanically interchangeable when installed in compatible fuse holders. Do not substitute with fuses of different package dimensions.

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