Cooper Bussmann MDA-1/4-R Cartridge Time Delay Fuse 0.25A

Product Description

The COOPER BUSSMANN MDA-1/4-R is a ceramic cartridge time delay fuse rated at 0.25 amps and 250 volts. It belongs to the mini fuse form factor, measuring 1.25 inches overall length and 0.25 inches in diameter. The time delay characteristic allows brief inrush currents to pass without nuisance tripping while still protecting sensitive circuits from sustained overloads. This fuse is suited for low-current control circuits, instrumentation, and electronic equipment where precise overcurrent protection is required. Licensed electricians and electronics technicians are the primary installers, though it also sees use in HVAC control boards and industrial control panels.

This fuse is appropriate for residential and light commercial applications where a compact, low-amperage overcurrent device is needed. Common install scenarios include control circuit protection in HVAC equipment, panel instrumentation, and electronic assemblies that demand a time delay response. Its ceramic body construction supports reliable performance in demanding environments where heat dissipation is a concern.

Key Features

• 0.25 amp rating with 250 volt capacity for low-current circuit protection
• Time delay action tolerates brief inrush without nuisance opens
• Ceramic fuse body for thermal stability and durability
• Mini cartridge form factor: 1.25 inches OAL x 0.25 inches diameter
• UL Listed under Guide JDYX File E19180
• CSA Class 1422-01 Certified and RoHS Compliant per MIL-STD-202 Method 213

Compatibility

Designed as an OEM-style replacement for mini cartridge time delay fuses in low-voltage control circuits and electronic equipment requiring a 0.25 amp, 250 volt time delay fuse.

Installation Notes

Installation should be performed by a qualified electrician or trained technician. Always de-energize and lockout the circuit before replacing a fuse. Verify the replacement fuse amperage and voltage ratings match the original before installation. Substituting a fuse with a higher amperage rating can compromise circuit protection and is not permitted under NEC guidelines.