GMA-250MA Equivalent & Substitute Parts

Part Overview

The GMA-250MA is a 250 mA, 250 V AC/DC fast-blow glass cartridge fuse in a 5mm x 20mm package manufactured by Eaton - Electronics Division. This fuse requires a compatible holder for installation and is designed for circuit protection applications requiring fast response characteristics. The part is active in production with 1063 pieces currently in stock. Substitute parts are identified based on matching electrical ratings, mechanical dimensions, response time characteristics, and approval agency certifications to ensure direct functional equivalence in circuit protection applications.

Key Parameters

Parameter	Specification
Current Rating	250 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

Substitute Part Grouping Explanation

Substitute parts for the GMA-250MA are qualified based on the following criteria:

Electrical Parameters (Must Match):

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

Mechanical Parameters (Must Match):

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

Compliance Parameters:

Product Status: Active
RoHS Compliance: ROHS3 Compliant or RoHS Compliant
Approval Agencies: Must include at least one common certification (UL, VDE, CSA, or equivalent)

All substitute parts listed meet these criteria and are functionally equivalent for direct replacement in circuit protection applications. Variations in DC Cold Resistance and Melting I²t values are within acceptable ranges for this fuse category and do not affect substitution eligibility.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (Amps)	Voltage Rating - AC (V)	Response Time	Package / Case	Breaking Capacity @ Rated Voltage (A)	Melting I²t	DC Cold Resistance (Ohms)	RoHS Status	Inventory (Pcs)
GMA-250MA	Eaton - Electronics Division	GMA	250 mA	250	Fast Blow	5mm x 20mm	35	0.018	1.735	ROHS3 Compliant	1063
GMA-250-R	Eaton - Electronics Division	GMA	250 mA	250	Fast Blow	5mm x 20mm	35	0.018	1.735	ROHS3 Compliant	1093
BK/GDB-250MA	Eaton - Electronics Division	GDB	250 mA	250	Fast Blow	5mm x 20mm	35	0.28	4.3	RoHS Compliant	882
BK/S500-250-R	Eaton - Electronics Division	S500	250 mA	250	Fast Blow	5mm x 20mm	35	0.28	4.3	ROHS3 Compliant	1150
BK1/S500-250-R	Eaton - Electronics Division	S500	250 mA	250	Fast Blow	5mm x 20mm	35	0.28	4.3	ROHS3 Compliant	782
S500-250-R	Eaton - Electronics Division	S500	250 mA	250	Fast Blow	5mm x 20mm	35	0.28	4.3	ROHS3 Compliant	805
0034.1510	SCHURTER Inc.	FSF 5x20	250 mA	250	Fast Blow	5mm x 20mm	35	0.0159	Not Specified	ROHS3 Compliant	1296
0217.250HXP	Littelfuse Inc.	217	250 mA	250	Fast Blow	5mm x 20mm	35	0.04	1.2325	ROHS3 Compliant	2215
0217.250MXBP	Littelfuse Inc.	217	250 mA	250	Fast Blow	5mm x 20mm	35	0.04	1.2325	ROHS3 Compliant	719
0217.250MXP	Littelfuse Inc.	217	250 mA	250	Fast Blow	5mm x 20mm	35	0.04	1.2325	ROHS3 Compliant	1963
0217.250TXP	Littelfuse Inc.	217	250 mA	250	Fast Blow	5mm x 20mm	35	0.04	1.2325	ROHS3 Compliant	1113

Engineering Selection Recommendations

Primary Substitutes (Eaton - Electronics Division):

GMA-250-R, BK/GDB-250MA, BK/S500-250-R, BK1/S500-250-R, and S500-250-R are direct substitutes manufactured by Eaton - Electronics Division. These parts maintain identical electrical and mechanical specifications with active product status. Selection among these variants depends on specific approval agency requirements and inventory availability. GMA-250-R and GMA-250MA share identical DC Cold Resistance and Melting I²t characteristics, providing the closest electrical match.

Secondary Substitutes (Multi-Manufacturer):

0034.1510 (SCHURTER Inc.), 0217.250HXP, 0217.250MXBP, 0217.250MXP, and 0217.250TXP (Littelfuse Inc.) are parametrically equivalent alternatives. These parts meet all electrical and mechanical requirements with active product status and ROHS3 compliance. Littelfuse 217 series parts feature lower DC Cold Resistance (1.2325 Ohms) compared to the GMA-250MA (1.735 Ohms), while maintaining identical breaking capacity and response characteristics. SCHURTER 0034.1510 provides the lowest Melting I²t value (0.0159) among all substitutes.

Approval Agency Considerations:

All substitute parts carry UL, VDE, or CSA certifications. GMA-250-R includes PSE approval. BK/S500-250-R and BK1/S500-250-R provide the broadest certification coverage (BSI, CCC, CSA, cULus, IMQ, SEMKO, VDE). Littelfuse 217 series parts include CE and K-MARK certifications in addition to UL, VDE, and CSA. Selection should align with specific application certification requirements.

Operating Temperature Range:

GMA-250MA does not specify an operating temperature range. Substitute parts with defined operating temperatures are 0034.1510, 0217.250HXP, 0217.250MXBP, 0217.250MXP, and 0217.250TXP, all rated -55°C ~ 125°C. Applications requiring temperature specification should prioritize these alternatives.

Frequently Asked Questions (FAQ)

Q: Can GMA-250-R be used as a direct replacement for GMA-250MA?

A: Yes. GMA-250-R is a direct substitute manufactured by the same company (Eaton - Electronics Division) with identical electrical ratings (250 mA, 250 V AC/DC), response time (Fast Blow), mechanical dimensions (5mm x 20mm), and DC Cold Resistance (1.735 Ohms). Both require a compatible fuse holder for installation.

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

A: Both series meet identical electrical and mechanical specifications for 250 mA, 250 V AC/DC fast-blow cartridge fuses in 5mm x 20mm packages. The primary differences are in DC Cold Resistance (GMA: 1.735 Ohms; S500: 4.3 Ohms) and Melting I²t values (GMA: 0.018; S500: 0.28). Approval agency certifications also differ, with S500 series providing broader international coverage.

Q: Are Littelfuse 217 series fuses compatible with GMA-250MA applications?

A: Yes. Littelfuse 0217.250HXP, 0217.250MXBP, 0217.250MXP, and 0217.250TXP are parametrically equivalent substitutes with matching current rating (250 mA), voltage rating (250 V AC), response time (Fast Blow), and package dimensions (5mm x 20mm). All carry UL, VDE, and CSA certifications. The lower DC Cold Resistance (1.2325 Ohms) does not affect functional compatibility.

Q: What does "Requires Holder" mean for these fuses?

A: All listed fuses are cartridge-type fuses that must be installed in a compatible fuse holder. The fuse itself is not self-contained and cannot be directly soldered or mounted to a circuit board. A separate fuse holder designed for 5mm x 20mm cartridge fuses is required for proper installation and electrical connection.

Q: Which substitute part has the highest inventory availability?

A: Littelfuse 0217.250HXP has the highest inventory with 2215 pieces in stock, followed by SCHURTER 0034.1510 with 1296 pieces. Eaton GMA-250-R has 1093 pieces available. Inventory levels should be verified at the time of procurement.

Q: Do all substitute parts have the same operating temperature range?

A: No. GMA-250MA and several Eaton substitutes do not specify an operating temperature range. SCHURTER 0034.1510 and all Littelfuse 217 series parts (0217.250HXP, 0217.250MXBP, 0217.250MXP, 0217.250TXP) are rated for -55°C ~ 125°C operation. Applications with specific temperature requirements should select parts with defined operating ranges.

Q: What approval agencies are common across all substitute parts?

A: UL and VDE certifications are present across most substitute parts. CSA certification is included in GMA-250-R, BK/S500-250-R, BK1/S500-250-R, and all Littelfuse 217 series parts. For applications requiring specific regional certifications (CE, K-MARK, BSI, CCC), refer to the individual part specifications.

Q: Can I substitute a fuse with a lower Melting I²t value?

A: Yes. Melting I²t is a thermal characteristic that determines the energy required to melt the fuse element. A lower Melting I²t value (faster thermal response) is acceptable as a substitute for a higher value in the same current and voltage rating. SCHURTER 0034.1510 (0.0159) and Littelfuse 217 series (0.04) have lower Melting I²t values than GMA-250MA (0.018), making them suitable substitutes.

Q: Are all listed parts RoHS compliant?

A: Yes. All substitute parts carry either ROHS3 Compliant or RoHS Compliant status. GMA-250MA, GMA-250-R, BK/S500-250-R, BK1/S500-250-R, S500-250-R, 0034.1510, and all Littelfuse 217 series parts are ROHS3 Compliant. BK/GDB-250MA is RoHS Compliant.

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