Cooper Bussmann MDA-8-R Cartridge Time Delay Fuse 8A

Product Description

The COOPER BUSSMANN MDA-8-R is a ceramic cartridge time delay fuse rated at 8 amps and 250 volts. It measures 1.25 inches in overall length and 0.25 inches in diameter, placing it in the standard mini fuse form factor. The time delay characteristic allows the fuse to ride through harmless inrush current spikes without nuisance opening, while still providing reliable overcurrent protection under sustained fault conditions. Licensed electricians, HVAC technicians, and electronics service professionals install this fuse in low-current control circuits where a fast-blow fuse would cause unnecessary downtime.

This fuse is suited for residential and light commercial control circuit applications including HVAC control boards, small motors, instrumentation panels, and low-voltage equipment requiring 250-volt rated overcurrent protection. Its compact mini cartridge body fits standard fuse holders and fuse clips designed for 0.25-inch diameter cartridge fuses. The ceramic body provides added arc-suppression capability compared to glass-body alternatives, making it appropriate for inductive load circuits commonly found in HVAC and electromechanical control applications.

Key Features

• Time delay action tolerates inrush current without nuisance opening on motor start and transformer energization
• Ceramic fuse body provides superior arc suppression for inductive load protection
• Rated 8 amps at 250 volts for low-current control circuit applications
• Mini cartridge form factor: 1.25 inches OAL, 0.25 inches diameter
• UL Listed under Guide JDYX File E19180
• CSA Class 1422-01 Certified and RoHS Compliant per MIL-STD-202 Method 204

Compatibility

Designed as an OEM-style replacement for mini cartridge fuse holders and fuse clips rated for 0.25-inch diameter, 1.25-inch length cartridge fuses in 250-volt control circuit applications.

Installation Notes

Installation should be performed by a qualified electrician or HVAC technician following applicable NEC guidelines. Always de-energize and lock out the equipment before replacing a fuse. Confirm that the replacement fuse amperage and voltage rating match the equipment nameplate or wiring diagram requirements exactly. Never substitute a higher-amperage fuse or bypass the fuse holder.