Cooper Bussmann GMA-4-R Cartridge Fast-acting Fuse 4A

Product Description

The COOPER BUSSMANN GMA-4-R is a glass-body, fast-acting cartridge fuse rated at 4 amps. It belongs to the mini fuse form factor, measuring 20 mm (approximately 0.787 inches) in overall length and 5 mm (approximately 0.197 inches) in diameter. Fast-acting fuses respond immediately to overcurrent events without the intentional time delay found in slow-blow designs, making them well-suited for circuits that require precise, rapid fault protection. The GMA-4-R carries a 10 kA interrupting rating at AC and meets UL, CSA, and RoHS certifications. Licensed electricians and electronics technicians are the primary installers of this component.

This fuse is used in low-current control circuits, instrumentation panels, HVAC control boards, and similar applications where a 5x20 mm fast-acting fuse is specified. The mini cartridge form factor is common in European-standard and IEC-style fuse holders found in industrial controls, HVAC equipment, and light commercial panels. It is sold in a minimum order quantity of 5 units, with each unit packaged individually.

Key Features

• Fast-acting response for immediate overcurrent protection with no intentional time delay
• Glass body construction allows visual inspection of the fuse element without removal
• 4 amp rating suitable for low-current control and instrumentation circuits
• 10 kA interrupting rating at AC for reliable fault clearing
• Standard 5x20 mm dimensions compatible with IEC-style fuse holders
• RoHS compliant; UL Listed and CSA Certified

Compatibility

Designed as a direct-fit replacement for 5x20 mm fast-acting cartridge fuse positions in IEC-style and European-standard fuse holders rated for the GMA series form factor.

Installation Notes

Installation should be performed by a qualified electrician or electronics technician. Always de-energize and lock out the circuit before replacing a fuse. Confirm the replacement fuse matches the amperage and voltage rating marked on the equipment or fuse holder. Do not substitute a higher-amperage fuse for a blown fuse, as this defeats overcurrent protection and creates a fire hazard.