Cooper Bussmann MDL-3/10-R Cartridge Time Delay Fuse 0.3A

Product Description

The COOPER BUSSMANN MDL-3/10-R is a cartridge-style, time delay fuse rated at 0.3 amps and designed for low-current circuit protection in electronic and control circuit applications. Constructed with a glass body, the fuse measures 1.25 inches in overall length and 0.25 inches in diameter, conforming to the standard 1/4 x 1-1/4 inch miniature cartridge form factor. The time delay characteristic allows brief inrush currents to pass without nuisance opening while still providing reliable protection against sustained overcurrent conditions. Licensed electricians and electronics technicians typically install this fuse in instrument panels, HVAC control boards, and low-voltage control circuits.

This fuse is suited for use in residential and light commercial control circuit applications where a miniature cartridge fuse is specified. Common installation scenarios include HVAC system control boards, small appliance protection, instrumentation panels, and electronic equipment requiring low-amperage overcurrent protection. The glass body allows visual inspection of the fuse element without removal, simplifying diagnostic work in the field.

Key Features

• Time delay action tolerates short-duration inrush currents without nuisance tripping
• Glass cartridge body allows visual fuse-element inspection
• 0.3A rating suits low-current control and instrument circuits
• Interrupting rating of 10,000A at 125V and 35A at 250V
• Meets UL 248-14, CSA Class 1422-01, CE, RoHS, and MIL-STD-202 Method 204 standards
• Standard 1/4 x 1-1/4 inch miniature cartridge form factor

Compatibility

Designed as an OEM-style replacement for standard 1/4 x 1-1/4 inch miniature cartridge fuse holders requiring a 0.3A time delay rating.

Installation Notes

Installation should be performed by a qualified electrician or electronics technician. Always de-energize and lock out the circuit before replacing a fuse. Verify the replacement fuse amperage, voltage rating, and time delay classification match the original equipment specification exactly before installing. Do not substitute a fast-acting fuse where a time delay type is specified by the equipment manufacturer.