Mars Fuse Cartrdg 100A 250V 57/ 5 M82047

The Mars M82047 is a 100 amp, 250 volt cartridge fuse for feeder and large branch circuit protection in commercial and industrial distribution.

At 100 amps, this fuse sits at the feeder level rather than serving individual small loads. Typical placement is protecting distribution subpanels, large compressor and motor circuits, commercial rooftop packaged equipment, and refrigeration rack feeds. The 250 volt rating covers single phase 120/240 volt services and 240 volt three phase systems widely used in light commercial and industrial buildings.

Fuses at this amperage level are physically larger, generally bolt-mounted or seated in heavy-duty clips, and carry substantially higher interrupting ratings than small control-circuit devices. Interrupting rating matters most at feeder locations, because available fault current is highest close to the service. A fuse whose interrupting rating is below the available fault current may rupture rather than clear the fault safely, which is a serious hazard to anyone near the equipment.

Applications include fused safety switches serving mechanical equipment, panelboard and switchboard feeder protection, motor control centre feeds, and commercial refrigeration and air conditioning distribution.

Replacement must match the original in class, amperage, voltage rating, interrupting rating, body dimensions, and time-current characteristic. Class substitution alters let-through energy, which can exceed the withstand rating of downstream equipment even when the fuse itself operates.

Before servicing, de-energize and lock out the circuit, verify absence of voltage with a meter rated for the system, and inspect the fuse clips or bolted terminals for heat damage and correct torque.

Brand

Mars

SKU

M82047

Category

Fuses

Weight

0.35 lbs

Dimensions

5.88" x 1.06" x 1.06"

Price

$51.00

Availability

In stock

Rating

4.5 / 5.0