Cooper Bussmann MDL-3-R Cartridge Time Delay Fuse 3A

Product Description

The COOPER BUSSMANN MDL-3-R is a glass cartridge time delay fuse rated at 3 amps. It measures 1.25 inches in overall length and 0.25 inches in diameter, fitting standard miniature fuse holders used throughout HVAC controls, low-voltage circuits, and light industrial equipment. The time delay characteristic allows brief inrush currents to pass without nuisance opening, while still protecting downstream components from sustained overcurrent conditions. With an interrupting rating of 100 amps at 250 volts and 10,000 amps at 125 volts, this fuse meets the demands of both residential and commercial control circuit applications. Licensed electricians and HVAC technicians install this fuse type as a routine service component.

The MDL-3-R is suited for low-voltage control boards, transformer secondary circuits, and instrumentation panels where a miniature cartridge fuse is required. Its glass body allows visual inspection of the element without removing the fuse from its holder, which simplifies troubleshooting during service calls. This fuse is a common replacement in HVAC control circuits, appliance wiring, and light electrical panels where a 3-amp time delay miniature fuse is specified by the equipment manufacturer.

Key Features

• Time delay characteristic tolerates inrush current without nuisance tripping
• Glass body allows visual element inspection without removal
• Interrupting rating of 100 amps at 250 volts and 10,000 amps at 125 volts
• Compact miniature cartridge form factor: 1.25 inches OAL, 0.25 inches diameter
• RoHS compliant and UL Listed under Guide JDYX File E19180
• CE Certified and CSA Class 1422-01 Certified

Compatibility

Designed as an OEM-style replacement miniature cartridge fuse for control circuits requiring a 3-amp, 250-volt time delay fuse in a 1.25-inch by 0.25-inch glass body format.

Installation Notes

This fuse is installed by licensed electricians or HVAC technicians. Always de-energize the circuit and verify zero voltage with a meter before removing or installing a fuse. Use a fuse puller rated for miniature cartridge fuses to avoid damaging the glass body or the holder contacts. Replace only with a fuse of identical amperage, voltage rating, and time delay classification as specified on the equipment nameplate or wiring diagram.