Mersen GGU Series Fast-Acting Midget Fuse, 125V

Mersen GGU Series Fast-Acting Midget Fuse, 125V

The Mersen GGU Series is a 125VAC-rated midget fuse line built to the standard 1-1/2" x 13/32" (10 mm x 38 mm) midget fuse dimensions, spanning an ampere range of 1A to 30A for supplemental overcurrent protection. Lower ampere ratings (1-15A) use a glass body so the status of the fusible element is clearly visible, while 20-30A ratings use a ceramic body that allows use in higher ambient temperature conditions than comparable fuses. With a medium lag, fast-acting speed characteristic and ferrule terminals in tin-plated copper, the GGU Series is UL Listed (1-15A) and UL Recognized (20-30A), though it is not intended for branch circuit protection.

Key Features

• Midget Fuse Dimensions: 1-1/2" x 13/32" (10 mm x 38 mm) body size, common across the GGU Series line.
• Ampere Range: Available from 1A through 30A to cover a broad range of 125VAC supplemental protection needs.
• Durable Construction: Glass body on 1-15A ratings for clear visibility of the fusible element; ceramic body on 20-30A ratings for use in higher ambient temperature applications.
• Connection Type: Ferrule terminals constructed of tin-plated copper for reliable clip-mount connections.
• Speed/Characteristic: Medium lag, fast-acting response for protection of circuits up to 30A at 125VAC.
• Interrupt Rating: 10 kA AC max I.R./breaking capacity (I1).
• Holder Compatibility: Can be used with UltraSafe™ fuse holders (1-30A).

Certifications & Compliance

• UL Listed, 1-15A
• UL Recognized, 20-30A
• Not rated for Branch Circuit Protection

Technical Specifications

• Ampere Rating: 3 A
• Rated Voltage AC (UL): 125 V
• Speed/Characteristic: Fast-Acting
• Fuse Class: Midget
• Connection/Terminal Type: Ferrule
• Connection/Terminal Material: Tin-Plated Copper
• Body/Insulating Material: Ceramic
• AC Max I.R./Breaking Capacity (I1): 10 kA
• Mounting: Clip
• Product Length: 1.5 in
• Product Diameter: 0.41 in

Typical Applications

• 125VAC General Purpose Circuits
• Supplemental Overcurrent Protection
• Panels and Equipment Requiring Midget Fuse Form Factor
• Use with UltraSafe™ Fuse Holders
• Higher Ambient Temperature Environments (20-30A ceramic-body ratings)

Why Mersen?

Mersen's GGU Series pairs UL-recognized/listed construction with practical design choices, glass bodies for visual fuse-status confirmation on lower ampere ratings, and ceramic bodies for higher-temperature durability on 20-30A ratings, so installers can select the right combination of visibility and thermal tolerance for the application. Ferrule terminals in tin-plated copper and a 10 kA interrupt rating support dependable, code-aware performance in professional electrical installations, and compatibility with UltraSafe™ fuse holders across the 1-30A range simplifies safe fuse handling and replacement in the field.