GMA-3A Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The GMA-3A is a 3 A, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This fast-blow fuse cartridge operates in a 5mm x 20mm form factor and requires a compatible fuse holder for installation. The part is currently active in production with 689 pieces in stock. Glass cartridge fuses of this specification are essential protective components in electrical circuits where overcurrent protection and circuit isolation are required. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and component availability options.

Key Parameters

Parameter	Value
Current Rating	3 A
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	100 A
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Substitute Part Grouping Explanation

Substitution of the GMA-3A is determined by strict equivalence across the following parameters: current rating (3 A), voltage rating (250 V AC), fuse type (cartridge glass), response time (fast blow), and physical package dimensions (5mm x 20mm). All identified substitute parts match these core electrical and mechanical specifications. Breaking capacity at rated voltage (100 A) is maintained across all substitutes. Substitutes are grouped as direct equivalents because they satisfy all functional requirements for circuit protection in applications designed for the GMA-3A specification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (Amps)	Voltage Rating - AC	Fuse Type	Response Time	Package / Case	Breaking Capacity @ Rated Voltage	Size / Dimension	Product Status
GMA-3A	Eaton - Electronics Division	3 A	250 V	Cartridge, Glass	Fast Blow	5mm x 20mm	100 A	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	Active
GMA-3-R	Eaton - Electronics Division	3 A	250 V	Cartridge, Glass	Fast Blow	5mm x 20mm	100 A	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	Active
0034.3880	SCHURTER Inc.	3 A	250 V	Cartridge, Glass	Fast Blow	5mm x 20mm	100 A	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	Active
0235003.HXP	Littelfuse Inc.	3 A	250 V	Cartridge, Glass	Fast Blow	5mm x 20mm	100 A	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	Active
0235003.MXP	Littelfuse Inc.	3 A	250 V	Cartridge, Glass	Fast Blow	5mm x 20mm	100 A	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	Active
0235003.VXP	Littelfuse Inc.	3 A	250 V	Cartridge, Glass	Fast Blow	5mm x 20mm	100 A	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	Active
FSC-3A	OptiFuse	3 A	250 V	Cartridge, Glass	Fast Blow	5mm x 20mm	100 A	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	Active

Engineering Selection Recommendations

All identified substitute parts are active products from established manufacturers in the fuse component industry. Selection among GMA-3A, GMA-3-R, 0034.3880, 0235003.HXP, 0235003.MXP, 0235003.VXP, and FSC-3A is based on availability, supply chain requirements, and certification compliance for the target application.

GMA-3-R (Eaton) maintains identical electrical and mechanical specifications to the GMA-3A with higher inventory availability (4069 pieces). Both Eaton parts carry CSA, PSE, and UL approvals.

SCHURTER 0034.3880 is certified to cULus standards with operating temperature range of -40°C to 85°C and 1709 pieces in stock.

Littelfuse parts 0235003.HXP, 0235003.MXP, and 0235003.VXP are all certified to CE, CSA, KC, PSE, and UL standards with extended operating temperature range of -55°C to 125°C. The 0235003.MXP variant has the highest inventory level at 17759 pieces.

OptiFuse FSC-3A is certified to cULus and UL 248 standards with operating temperature range of -55°C to 90°C and 781 pieces in stock.

All parts are RoHS3 compliant and carry EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can GMA-3A be directly replaced with GMA-3-R?

A: Yes. Both parts are manufactured by Eaton - Electronics Division and share identical electrical ratings (3 A, 250 V AC), fuse type (cartridge glass), response time (fast blow), and physical dimensions (5mm x 20mm). Both require a compatible fuse holder and carry the same approval agencies (CSA, PSE, UL).

Q: What is the difference between Littelfuse 0235003.HXP, 0235003.MXP, and 0235003.VXP?

A: All three Littelfuse parts are electrically and mechanically equivalent with identical current rating (3 A), voltage rating (250 V AC), fuse type (cartridge glass), response time (fast blow), and package dimensions (5mm x 20mm). The primary difference is inventory availability: 0235003.MXP has 17759 pieces in stock, 0235003.HXP has 1433 pieces, and 0235003.VXP has 763 pieces. All three carry CE, CSA, KC, PSE, and UL certifications.

Q: Are all substitute parts compatible with the same fuse holder as GMA-3A?

A: Yes. All substitute parts are cartridge glass fuses in the 5mm x 20mm form factor and require a compatible 5mm x 20mm fuse holder. Physical dimensions are identical across all parts: 0.205" diameter x 0.787" length.

Q: Which substitute part has the widest operating temperature range?

A: Littelfuse parts 0235003.HXP, 0235003.MXP, and 0235003.VXP all operate across -55°C to 125°C, providing the widest temperature range among all substitutes.

Q: What certifications are common across all substitute parts?

A: All substitute parts carry UL certification. CSA and PSE certifications are present on GMA-3A, GMA-3-R, and all Littelfuse variants. SCHURTER 0034.3880 carries cULus certification. OptiFuse FSC-3A carries cULus and UL 248 certifications.

Q: Can I use FSC-3A as a substitute in all applications where GMA-3A is specified?

A: FSC-3A meets all electrical and mechanical requirements for substitution: 3 A current rating, 250 V AC voltage rating, fast-blow response, and 5mm x 20mm package dimensions. OptiFuse FSC-3A carries cULus and UL 248 certifications. Application-specific compliance requirements should be verified against the target system's certification standards.

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