Cooper Bussmann MDA-25-R Cartridge Time Delay Fuse 25A

Product Description

The COOPER BUSSMANN MDA-25-R is a cartridge-style, time delay fuse rated at 25 amps and designed for reliable overcurrent protection in low-voltage electrical circuits. Built with a ceramic body, this mini fuse provides a 10,000-amp interrupting rating at 125 volts and 1,500 amps at 250 volts, making it suitable for circuits where brief inrush currents must be tolerated without nuisance blowing. The time delay characteristic allows motors and transformers to start up while still protecting downstream components from sustained fault current. Electricians and electronics service technicians install this fuse in panel boards, control circuits, and equipment requiring a compact, cylindrical protective element.

This fuse is used in residential and light commercial electrical applications where a small-form-factor, time delay overcurrent device is required. Its 0.25-inch diameter and 1.25-inch overall length conform to the standard mini cartridge fuse form factor, fitting fuse holders and blocks designed for that size. Common install scenarios include HVAC control boards, low-voltage transformer circuits, and industrial control panels where space is limited and inrush tolerance is necessary.

Key Features

• 25-amp time delay rating tolerates motor and transformer inrush without nuisance opening
• Ceramic body for thermal durability and arc containment
• 10,000-amp interrupting capacity at 125 volts; 1,500-amp interrupting capacity at 250 volts
• Mini cartridge form factor: 1.25 inches OAL, 0.25 inches diameter
• RoHS compliant; UL Recognized (Guide JDYX2, File E19180); CSA Class No. 1422 30 Component Accepted; MIL-STD-202 Method 204

Compatibility

Designed as a direct replacement for standard mini cartridge fuse holders and fuse blocks accepting a 0.25-inch diameter by 1.25-inch overall length cylindrical fuse element.

Installation Notes

Installation should be performed by a qualified electrician in accordance with applicable NEC requirements. Always de-energize and lock out the circuit before removing or installing a fuse. Use an appropriate fuse puller for cartridge-style fuses to avoid contact with energized conductors. Verify the replacement fuse amperage, voltage rating, and interrupting rating match the circuit requirements before installation.