Bussmann 170M6462 Eaton series high speed square body fuse, 700V (UL), 690V (IEC), 800A, 200 kAIC, Other, Fuse, Class aR, Flush - 170M6462

It is a Class aR fuse, utilization category aR (accompanied semiconductor protection). That means it only protects against short circuits, not overload. The circuit still needs separate overload protection, typically the drive's own electronic trip or an upstream breaker. If you need a fuse that handles both overload and short circuit on its own, you want a gR/gS type instead, not this one.

800 A, rated 690 V AC to IEC and 700 V to UL. Interrupting rating is 200 kAIC, so it can be applied on high fault current industrial services. It is an AC-rated device, so do not apply it on a DC bus link without the manufacturer's DC rating for that part.

It is a square body fuse with flush end contacts and flush mounting, so it lands flat against the busbar or holder pads and bolts through, rather than using blade or bolt-down tag extensions. The body measures 53 x 76 x 92 mm. Check your holder centers against that body before ordering, because flush-contact bodies and bolted-tag bodies of the same amp rating are not interchangeable in the same mount.

For semiconductor coordination the 170M6462 publishes a pre-arcing (melting) I2t of 69,500 A2s and a total clearing I2t of 465,000 A2s at 660 V. Compare the clearing figure against the I2t withstand of the thyristor or diode you are protecting; the device rating must exceed the fuse's total clearing value for the fuse to save it.

No. This version is supplied without insulated metal gripping lugs (IMGL), so there are no insulated handles for pulling the fuse. Plan on isolating and de-energizing the section before removal, and if your maintenance procedure depends on gripping lugs you will need the IMGL variant of the 170M series instead.

Watt loss is 115 W at rating. Multiply by the number of poles when you size enclosure ventilation or cooling, and derate per the holder manufacturer's guidance if the fuse sits in still air or a crowded cabinet. That figure is one of the larger single heat sources in a drive cubicle, so it matters for thermal design.

It is UL Recognized and CE Marked. UL Recognized means it is approved as a component for use inside listed equipment under the conditions of acceptability, not as a standalone listed device, which is the normal status for high speed semiconductor fuses in drive assemblies.

Order the genuine Eaton Bussmann 170M6462. The 170M range runs through many amp and voltage combinations that share the same body style, so matching only the physical size is not enough. Confirm the full number on the fuse label, since an adjacent 170M part may be a different amp rating or a different I2t class in an identical package.