Bussmann 170M6021 Eaton series high speed square body fuse, 700V (UL), 690V (IEC), 2000A, 200 kAIC, Top fuse status indicator, Fuse, Blade end X blade end, Class aR, DIN 43 620 - 170M6021

That is exactly what it is built for. The 170M6021 uses DIN 43 620 mounting with a square body and slotted center bolted tags, so it bolts into standard DIN 43 620 size 3 style mounting centers rather than clipping into a cylindrical holder. Body envelope is 168 mm long, 95 mm wide and 76 mm high, so confirm you have that much room in the enclosure before you bolt it in.

No. Class aR is a partial range semiconductor protection fuse, catalogued as utilization category aR (accompanied semiconductor protection). It protects diodes, thyristors and IGBT stacks against short circuit only, and it relies on another device (breaker or overload relay) for low level overload and cable protection. Do not substitute the 170M6021 for a branch circuit fuse or a cable protection fuse; use it in the drive, rectifier or soft starter position it was specified for.

The 170M6021 is rated 200 kAIC, which covers most high available fault current industrial service entrances feeding large drives. For coordinating with the semiconductor withstand, the published let-through data is 6,350,000 A2s clearing I2t at 660 V and 1,150,000 A2s pre-arc I2t. Compare those against the I2t withstand of the thyristor or diode you are protecting; the device must survive more than the fuse lets through.

Yes, this is the genuine Bussmann (Eaton) part, MPN 170M6021, a 2000 A Class aR square body high speed fuse with a top status indicator and blade end x blade end terminations on DIN 43 620 centers. Order by that number and the physical fit and let-through characteristics match what came out.

It is a blade end x blade end fuse with slotted center bolted tags, so both ends land flat against the busbar or holder pad and are secured with through bolts. There are no insulated metal gripping lugs on this one, so plan on bolted terminations and torque the hardware to the panel builder's spec.

Yes. The 170M6021 carries a top fuse status indicator, so a technician can confirm an open element visually from the front of the fuse without pulling it or metering across it. Handy in a multi-fuse rectifier bank where you need to find the one that cleared.

Published power loss is 175 W. At 2000 amps that is real heat inside the cabinet, so it needs to go into your enclosure thermal calculation along with the drive and busbar losses. Derating rules from the fuse holder manufacturer apply if the ambient runs high or if several of these sit side by side in a tight stack.

It is specified for AC service, so do not drop it into a DC link position without the manufacturer's DC application data. Weight is 955 g, light enough for a one hand swap, but at 168 x 95 x 76 mm you will want a socket on the tag bolts rather than trying to work it loose by hand.