Bussmann 170M6464 Eaton series high speed square body fuse, 700V (UL), 690V (IEC), 1000A, 200 kAIC, Other, Fuse, Class aR, Flush - 170M6464

No. The 170M6464 is a Class aR high speed fuse built for semiconductor protection, which means it is a partial-range device intended to protect diodes, SCRs and IGBTs against short circuit current only. It will not provide the overload protection a branch circuit or motor feeder needs. For overload duty you still need a gG/gL or UL Class fuse or a breaker upstream; the aR fuse sits in series with the semiconductor stack.

Mounting is flush: square body with flush end contacts, so it bolts directly to busbar or flat pads through the end plates. It is not a blade or bolt-down-tag style body, and it has no insulated metal gripping lugs, so a holder or base expecting IMGL grips or projecting blade tags is the wrong mount. Body size is 53 x 76 x 92 mm.

Pre-arcing (melting) I2t is 140000 A2s and total clearing I2t is 945000 A2s at 660 V. Compare the clearing figure against the semiconductor's own I2t withstand rating: the device rating must exceed 945000 A2s at your operating voltage for the fuse to protect it. Below 660 V the clearing I2t drops, which gives you margin.

No, not for semiconductor duty. A gG fuse of the same amperage clears far more slowly and lets through much higher I2t than the 945000 A2s of this aR link, so the diode or thyristor fails before the fuse does. Replace an aR high speed square body fuse with another high speed aR device of matching amps, voltage and body size.

It is a 1000 A fuse rated 700 V under UL and 690 V AC under IEC. Interrupting rating is 200 kAIC, so it is suited to drive and rectifier sections on stiff 690 V systems where available fault current is high.

Rated watt loss is 122 W at full load, which is significant for a panel or drive cabinet. Size ventilation and busbar cross-section with that in mind, and remember that restricted airflow around a square body fuse means you have to derate the amp rating. Weight is about 848 g, so the terminal pads carry real mass.

Yes. The 170M6464 is CE marked and IEC rated, with a 690 V AC IEC voltage rating, so it suits machinery built to IEC standards for European shipment. It also carries a 700 V UL rating for North American work.

The indicator type on the 170M6464 is listed only as Other, not as a standard striker or microswitch option, so do not plan on a trip contact feeding your PLC from this fuse. If you need remote blown-fuse annunciation, specify a 170M body variant ordered with a microswitch indicator, or monitor voltage across the fuse externally.

The part number to quote is 170M6464, an Eaton Bussmann catalog number for the 170M high speed square body series. That single number defines the 1000 A rating, aR class and flush contact body, so no suffix or option code is needed on the order.