GMA-3A Eaton GMA-3A is a 3A, 250VAC fast blow cartridge fuse in a 5x20mm glass tube package. It features a breaking capacity of 100A at 250VAC and 10,000A at 125VAC.
Mfr Part #:

GMA-3A

Available from 1 distributors
Mfr Name: Eaton - Electronics Division
Eaton - Electronics Division
Eaton GMA-3A is a 3A, 250VAC fast blow cartridge fuse in a 5x20mm glass tube package. It features a breaking capacity of 100A at 250VAC and 10,000A at 125VAC.
Total Stock: 55 pcs

GMA-3A Available from 1 distributor

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55 pcs
55 pcs On Request 1 On Request On Request 2026-02-25 06:16:38 On Request On Request

GMA-3A Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Approval Agency
Automotive Grade
Breaking Capacity @ Rated Voltage
Construction
Current Rating (Amps)
Fuse Type
Industrial Grade
Medical Grade
Melting I²t
Military Grade
Mounting Type
Response Time
SVHC Present
Tape & Reel
Termination Style
Voltage Rating

GMA-3A Description

Short technical summary and product information.

The Eaton GMA-3A is a fast-acting, 3A rated cartridge fuse designed for 250VAC operation. It is housed in a standard 5mm x 20mm glass tube with nickel-plated brass endcaps, requiring a holder for installation. The fuse is UL/CSA 248-14 listed and carries approvals from CSA, PSE, and UL.

 

With a typical pre-arcing I²t of 8.8 A²s, this fuse is suitable for protecting circuits where fast response to overcurrents is needed. The maximum voltage drop at rated current is 215 mV, and the DC cold resistance is typically 0.039 Ω. The breaking capacity is 100A at 250VAC and 10,000A at 125VAC, ensuring reliable interruption under fault conditions.

 

This fuse is commonly used in a variety of electronic equipment for overcurrent protection, such as power supplies, lighting, and industrial controls. Its compact 5x20mm size allows for use in standard fuse holders. The fast blow characteristic makes it ideal for circuits that are sensitive to short-duration surges.

 

The glass tube construction provides visual indication of fuse status. The fuse is RoHS compliant and REACH unaffected. It is designed to meet the requirements of UL/CSA 248-14. For the specified ratings, the opening time is within 60 minutes at 135% of rated current and within 2 minutes at 200% of rated current.

GMA-3A Quick Information

Product Type: Fuse
Series: GMA
Canonical Name: GMA-3A Fast Blow Fuse, 3A, 250VAC, 5x20mm
Subcategory: Fast Blow Fuse

GMA-3A Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

GMA-3A Features

  • Fast blow response for sensitive circuits.
  • Rated for 3A at 250VAC operation.
  • 5x20mm glass tube with nickel-plated brass endcaps.
  • Breaking capacity of 100A at 250VAC.
  • Typical pre-arcing I²t of 8.8 A²s.

GMA-3A Applications

  • Used in power supply overcurrent protection.
  • Ideal for industrial control panel protection.
  • Suitable for lighting and ballast protection.
  • Common in consumer electronics fuse holders.

GMA-3A FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the GMA-3A?

3A.

What is the voltage rating of the GMA-3A?

250VAC.

What is the breaking capacity of the GMA-3A?

100A at 250VAC; 10,000A at 125VAC.

What is the response time of the GMA-3A?

Fast blow.

What is the package size of the GMA-3A?

5mm x 20mm glass tube.

What is the typical pre-arcing I²t of the GMA-3A?

8.8 A²s.

What is the DC cold resistance of the GMA-3A?

0.039 Ω.

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