Cooper Bussmann GDB-630MA Cartridge Fast-acting Fuse 0.63A

Product Description

The COOPER BUSSMANN GDB-630MA is a glass-body cartridge fuse rated at 0.63 amps with fast-acting response characteristics. Measuring 20 mm in overall length and 5 mm in diameter, this miniature fuse is designed to protect sensitive low-current circuits from overcurrent conditions. The fast-acting design responds quickly to fault currents without intentional time delay, making it suitable for circuits where downstream components require immediate protection. Licensed electricians and electronics technicians install this fuse type in control boards, instrumentation panels, and low-voltage equipment where precise overcurrent protection is required.

This fuse is a fit for residential and commercial control circuit applications, instrument panels, small appliance protection, and electronic equipment requiring IEC 60127-2 compliant overcurrent protection. The 5 x 20 mm form factor is a widely accepted miniature fuse size used across HVAC control boards, building automation equipment, and test instrumentation. Its glass body allows visual inspection of the fuse element without removal from the circuit holder.

Key Features

• Fast-acting fuse timing for immediate overcurrent response with no intentional delay
• Glass cartridge body enables visual inspection of the fuse element in the field
• 0.63 amp rating suits low-current control and instrumentation circuits
• 5 x 20 mm miniature form factor fits standard IEC-style panel-mount fuse holders
• Certified to IEC 60127-2 and recognized under UL Guide JDYX2 File E19180
• RoHS compliant construction

Compatibility

Designed as a direct replacement for standard 5 x 20 mm fast-acting glass cartridge fuses in control panels, instrumentation equipment, and electronic devices requiring IEC 60127-2 compliant overcurrent protection.

Installation Notes

De-energize the circuit and verify zero voltage before replacing any fuse. This fuse installs in a compatible 5 x 20 mm fuse holder and should be replaced only with a fuse of identical amperage rating and fuse timing class. Never substitute a higher-amperage fuse. Installation in control panels and electrical equipment should comply with applicable NEC requirements and equipment manufacturer guidelines.