GMA-250-R Equivalent & Substitute Parts

Part Overview

The GMA-250-R is a 250 mA, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is designed for use in 5mm x 20mm fuse holders and requires a separate holder for installation. The part maintains Active product status with 1093 pieces in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and design standardization across compatible applications where electrical and mechanical parameters align.

Key Parameters

Parameter	Value
Current Rating	250 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35A
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
RoHS Status	ROHS3 Compliant
Approval Agencies	CSA, PSE, UL

Substitute Part Grouping Explanation

Substitute parts for the GMA-250-R are classified based on strict electrical and mechanical parameter alignment:

Primary Substitution Criteria:

Current Rating: 250 mA (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)
Breaking Capacity @ Rated Voltage: 35A (exact match required)
Mounting Type: Requires Holder (exact match required)

Substitute Categories:

Category 1: Direct Manufacturer Equivalents (Eaton - Electronics Division)

BK/GMA-250-R: Identical electrical and mechanical specifications to GMA-250-R
Parametric equivalents within Eaton S500 series (BK/S500-250-R, BK1/S500-250-R, S500-250-R) meet all primary criteria with variations in melting I²t and DC cold resistance

Category 2: Cross-Manufacturer Equivalents (Littelfuse Inc.)

0235.250HXP and 0235.250MXP (Series 235): Meet all primary criteria with operating temperature range -55°C ~ 125°C
0217.250HXP, 0217.250MXP, and 0217.250TXP (Series 217): Meet all primary criteria with operating temperature range -55°C ~ 125°C

Category 3: Cross-Manufacturer Equivalents (SCHURTER Inc.)

0034.1510 (Series FSF 5x20): Meets all primary criteria with operating temperature range -55°C ~ 125°C

All substitute parts maintain ROHS3 compliance and 35A breaking capacity at rated voltage.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (mA)	Voltage (V AC)	Package	Response Time	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ohms)	Inventory (Pcs)	Approval Agencies
GMA-250-R	Eaton	GMA	250	250	5x20mm	Fast Blow	35	0.018	1.735	1093	CSA, PSE, UL
BK/GMA-250-R	Eaton	GMA	250	250	5x20mm	Fast Blow	35	0.018	1.735	4246	CSA, PSE, UL
BK/S500-250-R	Eaton	S500	250	250	5x20mm	Fast Blow	35	0.28	4.3	1150	BSI, CCC, CSA, cULus, IMQ, SEMKO, VDE
BK1/S500-250-R	Eaton	S500	250	250	5x20mm	Fast Blow	35	0.28	4.3	782	BSI, CCC, CSA, cULus, IMQ, SEMKO, VDE
S500-250-R	Eaton	S500	250	250	5x20mm	Fast Blow	35	0.28	4.3	805	BSI, CCC, CSA, cURus, IMQ, SEMKO, VDE
0235.250HXP	Littelfuse	235	250	250	5x20mm	Fast Blow	35	0.0166	2.25	1314	CE, CSA, KC, UL
0235.250MXP	Littelfuse	235	250	250	5x20mm	Fast Blow	35	0.0166	2.25	1196	CE, CSA, KC, UL
0034.1510	SCHURTER	FSF 5x20	250	250	5x20mm	Fast Blow	35	0.0159	Not Specified	1296	CCC, cURus, VDE
0217.250HXP	Littelfuse	217	250	250	5x20mm	Fast Blow	35	0.04	1.2325	2215	CCC, CE, CSA, K-MARK, SEMKO, UL, VDE
0217.250MXP	Littelfuse	217	250	250	5x20mm	Fast Blow	35	0.04	1.2325	1963	CCC, CE, CSA, K-MARK, SEMKO, UL, VDE
0217.250TXP	Littelfuse	217	250	250	5x20mm	Fast Blow	35	0.04	1.2325	1113	CCC, CE, CSA, KC, SEMKO, UL, VDE

Engineering Selection Recommendations

Eaton GMA Series Direct Equivalent: BK/GMA-250-R is the direct equivalent to GMA-250-R with identical electrical specifications, melting I²t (0.018), and DC cold resistance (1.735 Ohms). Both parts carry CSA, PSE, and UL approvals. BK/GMA-250-R offers higher inventory availability (4246 pcs vs. 1093 pcs).

Eaton S500 Series Parametric Equivalents: BK/S500-250-R, BK1/S500-250-R, and S500-250-R meet all primary electrical and mechanical criteria. These parts differ in melting I²t (0.28 vs. 0.018) and DC cold resistance (4.3 Ohms vs. 1.735 Ohms). S500 series parts carry expanded approval certifications including BSI, CCC, cULus, IMQ, SEMKO, and VDE. Selection depends on application thermal response requirements.

Littelfuse 235 Series: 0235.250HXP and 0235.250MXP meet all primary criteria with melting I²t of 0.0166 and DC cold resistance of 2.25 Ohms. Operating temperature range -55°C ~ 125°C. Certifications include CE, CSA, KC, and UL. Inventory availability: 1314 pcs (HXP) and 1196 pcs (MXP).

Littelfuse 217 Series: 0217.250HXP, 0217.250MXP, and 0217.250TXP meet all primary criteria with melting I²t of 0.04 and DC cold resistance of 1.2325 Ohms. Operating temperature range -55°C ~ 125°C. Certifications include CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. Highest inventory availability among Littelfuse options: 2215 pcs (HXP), 1963 pcs (MXP), and 1113 pcs (TXP).

SCHURTER FSF 5x20 Series: 0034.1510 meets all primary criteria with melting I²t of 0.0159 and operating temperature range -55°C ~ 125°C. Certifications include CCC, cURus, and VDE. Inventory: 1296 pcs.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH Unaffected status. Selection should account for specific regulatory requirements in target markets. Littelfuse 217 series offers the broadest certification coverage across international standards.

Frequently Asked Questions (FAQ)

Q: Can BK/GMA-250-R be used as a direct replacement for GMA-250-R? A: Yes. BK/GMA-250-R is a direct equivalent with identical current rating (250 mA), voltage rating (250 V AC), package (5x20mm), response time (fast blow), breaking capacity (35A), melting I²t (0.018), and DC cold resistance (1.735 Ohms). Both parts carry CSA, PSE, and UL approvals.

Q: What is the difference between Eaton GMA and S500 series fuses? A: Both series meet the primary electrical and mechanical criteria (250 mA, 250 V, 5x20mm, fast blow, 35A breaking capacity). The key differences are melting I²t (GMA: 0.018 vs. S500: 0.28) and DC cold resistance (GMA: 1.735 Ohms vs. S500: 4.3 Ohms). S500 series carries additional international certifications (BSI, CCC, IMQ, SEMKO, VDE). Selection depends on application thermal response requirements and regulatory certifications needed.

Q: Are Littelfuse 235 and 217 series interchangeable with Eaton GMA-250-R? A: Both Littelfuse series meet all primary electrical and mechanical criteria. Littelfuse 235 series has melting I²t of 0.0166 and DC cold resistance of 2.25 Ohms. Littelfuse 217 series has melting I²t of 0.04 and DC cold resistance of 1.2325 Ohms. Both series support operating temperature range -55°C ~ 125°C. Interchangeability depends on application-specific thermal response and certification requirements.

Q: What certifications does each substitute part carry? A: GMA-250-R and BK/GMA-250-R: CSA, PSE, UL. Eaton S500 series: BSI, CCC, CSA, cULus, IMQ, SEMKO, VDE. Littelfuse 235 series: CE, CSA, KC, UL. Littelfuse 217 series: CCC, CE, CSA, K-MARK, SEMKO, UL, VDE. SCHURTER 0034.1510: CCC, cURus, VDE. Selection should align with target market regulatory requirements.

Q: Does package size remain constant across all substitute parts? A: Yes. All substitute parts maintain the 5mm x 20mm package size (0.205" Dia x 0.787" L), ensuring compatibility with existing 5x20mm fuse holders. Mounting type remains "Requires Holder" for all parts.

Q: What is the significance of melting I²t values in fuse selection? A: Melting I²t indicates the thermal energy required to melt the fuse element. GMA-250-R has melting I²t of 0.018. Eaton S500 series has 0.28, Littelfuse 235 has 0.0166, Littelfuse 217 has 0.04, and SCHURTER 0034.1510 has 0.0159. Lower values indicate faster thermal response. Application requirements determine which melting I²t value is appropriate.

Q: Which substitute part offers the highest inventory availability? A: BK/GMA-250-R (Eaton) offers the highest inventory with 4246 pieces in stock, followed by 0217.250HXP (Littelfuse 217 series) with 2215 pieces.

Q: Can I mix different substitute parts in the same application? A: All substitute parts meet the primary electrical and mechanical criteria (250 mA, 250 V, 5x20mm, fast blow, 35A breaking capacity). However, application-specific requirements such as thermal response characteristics, operating temperature range, and regulatory certifications should be evaluated before mixing parts in the same system.

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