170M7099 Eaton Bussmann 690V 1250A Class aR High Speed Fuse

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Eaton Bussmann 170M7099 — 690V 1250A Class aR high speed fuse. Protects semiconductors in drives, rectifiers and inverters.

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Eaton Fuse Bussmann Low Voltage Fuses Class aR Semiconductor Protection 690 V

Product Details
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170M7099 Eaton Bussmann 690V 1250A Class aR High Speed Fuse

At a Glance

690 V rated voltage, 1250 A rated current
Class aR time-current characteristic
Non Indicating

The Eaton Bussmann 170M7099 is a high speed fuse with 690 V rated voltage, 1250 A rated current, carrying a Class aR time-current characteristic. Construction is non indicating.

Specifications

General specifications

UPC	051712266611
Product Length/Depth	120 mm
Product Height	66.6 mm
Product Width	105 mm
Product Weight	1221 g

Electrical data

Amperage Rating	1250 A
Voltage rating	690 V
Clearing (I2T)	145000 at 965000 V
Pre arc (I2T)	145000
Watt losses	195 W
Class	Class aR

Product specification

Application	Protection of power rectifiers
Fuse indicator	Non Indicating
Fuse size	4

Series Selection Table

Applications

Industrial equipment

Selection Notes

Semiconductor fuses are chosen on I²t let-through against the device surge rating, not on continuous current alone.

Common Questions

What are the ratings of the Eaton Bussmann 170M7099?

690 V / 1250 A.

What does Class aR mean for the 170M7099?

Class aR defines the fuse's time-current characteristic. E-rated fuses carry a defined melting curve so they coordinate predictably with upstream and downstream devices; mixing E and non-E ratings in one feeder defeats that coordination.

How should I select the 170M7099 for a circuit?

Match the voltage rating to the system voltage, keep the continuous current above the load current, and check that the interrupting rating exceeds the available fault current. In medium voltage work, select on the transformer or feeder fault level rather than the load current alone.

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