Mars Fuse Cartridge 50A 250V Dual M82042

The Mars M82042 is a 50 amp, 250 volt dual element cartridge fuse for motor branch circuits and equipment loads with high starting inrush.

Dual element construction is the mechanism behind time delay operation. The fuse contains two distinct elements in series: a short circuit element that opens almost instantly under high fault current, and a thermal overload element that responds more slowly to moderate sustained overcurrent. This arrangement allows the fuse to ignore the brief, high magnitude inrush of a motor start while still providing fast clearing of a genuine short circuit and reliable protection against prolonged overload.

The practical benefit is that a dual element fuse can be sized much closer to the motor running current than a single element fuse. Tighter sizing means the fuse will actually interrupt the conditions that destroy motors: locked rotor from a seized bearing, a failed start or run capacitor, mechanical binding, or single-phasing on a three phase supply.

At 50 amps and 250 volts, this fuse typically serves residential and light commercial condensing units, compressor circuits, and larger fan and pump motors on 120/240 volt or 240 volt three phase systems.

Applications include fused disconnects at air conditioning and refrigeration equipment, motor branch circuit protection, and general equipment feeders.

Never substitute a single element or fast-acting fuse where dual element was specified; the circuit will nuisance-trip on every start. Verify class, voltage, amperage, and body dimensions against the original, and de-energize and lock out before servicing.

Brand

Mars

SKU

M82042

Category

Fuses

Weight

0.12 lbs

Dimensions

3.00" x 0.81" x 0.81"

Price

$34.00

Availability

In stock

Rating

4.4 / 5.0