Bussmann 170M6244 Eaton series high speed square body fuse, 700V (UL), 690V (IEC), 630A, 100 kAIC, Other, Fuse, Class aR, DIN 43 620 - 170M6244

Yes. The 170M6244 is a square body fuse with slotted center bolted tags, mounted per DIN 43 620. It bolts down rather than clipping in, so you need a base or busbar drilled for that pattern. The body measures 168 mm long, 95 mm wide and 76 mm high, so check you have that envelope inside the enclosure before ordering.

No. Class aR is a partial-range (accompanied) semiconductor protection fuse. It only interrupts short circuit current and relies on another device, typically the drive or a breaker, to handle overload and low-level fault current. The 170M6244 is built for protecting diodes, SCRs and IGBT rectifier stacks. If you need full-range branch circuit protection, you want a gR/gS type or a standard UL class fuse instead.

630 amps, AC. The listing rates it at 700 V under UL and 690 V under IEC, with an interrupting rating of 100 kAIC. Size the base and cable for 630 A continuous, and remember that on a semiconductor fuse the published amp rating assumes forced or unrestricted air cooling at rated conditions.

Pre-arcing (melting) I2t is 83,500 A2s. Clearing I2t is 495,000 A2s at 1000 V and 665,000 A2s at 1250 V. To protect a semiconductor, the device's own I2t withstand must exceed the fuse clearing I2t at your actual system voltage. Note the clearing figures climb sharply with applied voltage, so coordinate at the highest voltage the circuit can see, not the nominal.

Watt loss at rated current is 115 W. That is a real heat load for a panel designer, and on a multi-phase rectifier with three or six of these you are adding several hundred watts inside the cabinet. Size ventilation or the cooling scheme accordingly, since a semiconductor fuse running hot derates in current carrying capability.

The 170M6244 is UL Recognized, not UL Listed, which is normal for a semiconductor fuse used as a component inside equipment rather than as standalone branch protection. It is also CE Marked, so it can be specified in panels built for European deployment.

No, this one is not supplied with insulated metal gripping lugs. The tags are bare slotted bolted tags, so plan on isolating and locking out the circuit before you pull or replace it. If your maintenance procedure calls for IMGL, you need a different variant in the 170M range.

Yes, 170M6244 is the complete Bussmann/Eaton part number and it is ordered as a single item in standard packaging. Match it exactly against the old fuse body, since neighbouring 170M numbers change amp rating, voltage class or tag style while looking near identical on the shelf.