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170M4957 Eaton Bussmann 1000V 450A Class aR High Speed Fuse
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Eaton Bussmann 170M4957 — 1000V 450A Class aR high speed fuse, 125 kA interrupting. Protects semiconductors in drives, rectifiers and inverters.
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170M4957 Eaton Bussmann 1000V 450A Class aR High Speed Fuse
At a Glance
- 1000 V (IEC) rated voltage, 450 A rated current
- 125 kA interrupting rating
- Class aR time-current characteristic
The Eaton Bussmann 170M4957 is a square body fuse with 1000 V (IEC) rated voltage, 450 A rated current, 125 kA interrupting capacity, carrying a Class aR time-current characteristic.
Specifications
General specifications
| UPC | 051712679497 |
| EAN | 5027590455107 |
| Product Length/Depth | 73 mm |
| Product Height | 52 mm |
| Product Width | 170 mm |
| Product Weight | 576 g |
Electrical data
| Amperage Rating | 450 A |
| Voltage rating | 1000 V (IEC) |
| Voltage type | AC/DC |
| Watt losses | 80 W |
| Breaking capacity | 125 kA |
| Class | Class aR |
Product specification
| Fuse size | 1 |
| Fitted with: | Type K Indicator for micro |
Series Selection Table
Applications
- Energy and utility distribution
- Industrial equipment
- Photovoltaic systems
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 170M4957?
1000 V (IEC) / 450 A, with a 125 kA interrupting rating.
How much fault current can the 170M4957 interrupt?
125 kA. The available fault current at the installation point must not exceed this value.
What does Class aR mean for the 170M4957?
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 170M4957 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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