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170M3958 Eaton Bussmann 1000V 250A Class aR High Speed Fuse
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Eaton Bussmann 170M3958 — 1000V 250A Class aR high speed fuse, 100 kA interrupting. Protects semiconductors in drives, rectifiers and inverters.
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170M3958 Eaton Bussmann 1000V 250A Class aR High Speed Fuse
At a Glance
- 1000 V rated voltage, 250 A rated current
- 100 kA interrupting rating
- Class aR time-current characteristic
The Eaton Bussmann 170M3958 is a square body fuse with 1000 V rated voltage, 250 A rated current, 100 kA interrupting capacity, carrying a Class aR time-current characteristic.
Specifications
General specifications
| UPC | 051712678834 |
| EAN | 5704057023610 |
| Product Length/Depth | 61 mm |
| Product Height | 72.5 mm |
| Product Width | 43 mm |
| Product Weight | 956 g |
Electrical data
| Amperage Rating | 250 A |
| Voltage rating | 1000 V |
| Voltage type | AC |
| Clearing (I2T) | 57000 at 1000 V |
| Pre arc (I2T) | 9550 |
| Watt losses | 55 W |
| Breaking capacity | 100 kA |
| Class | Class aR |
Product specification
| Fuse size | 1* |
| Fitted with: | Type K Indicator for micro |
Series Selection Table
Applications
- Industrial equipment
Selection Notes
- Check the voltage rating against the system voltage, and the interrupting rating against the available fault current, before specifying.
Common Questions
What are the ratings of the Eaton Bussmann 170M3958?
1000 V / 250 A, with a 100 kA interrupting rating.
How much fault current can the 170M3958 interrupt?
100 kA. The available fault current at the installation point must not exceed this value.
What does Class aR mean for the 170M3958?
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 170M3958 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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