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170M4493 Eaton Bussmann 1250V 400A Class aR High Speed Fuse
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Eaton Bussmann 170M4493 — 1250V 400A Class aR high speed fuse. Protects semiconductors in drives, rectifiers and inverters.
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170M4493 Eaton Bussmann 1250V 400A Class aR High Speed Fuse
At a Glance
- 1250 V rated voltage, 400 A rated current
- Class aR time-current characteristic
- Flush end GKN/75 Type K indicator for micro
The Eaton Bussmann 170M4493 is a square body fuse with 1250 V rated voltage, 400 A rated current, carrying a Class aR time-current characteristic.
Specifications
General specifications
| UPC | 051712259057 |
| EAN | 5704057026055 |
| Product Length/Depth | 51.1 mm |
| Product Height | 66.5 mm |
| Product Width | 51.2 mm |
| Product Weight | 0.001 g |
| Global Catalog | 170M4493 |
Product specifications
| Amperage Rating | 400 A |
| Utilization category | aR (accompanied semiconductor protection) |
| Voltage type | AC/DC |
| Fuse size | 1 |
| Class | Class aR |
| Clearing (I2T) | 175000 at 1000 V, 235000 at 1250 V |
| Watt losses | 75 W |
| Pre arc (I2T) | 29500 |
| Fitted with: | Type K Indicator for micro |
| Mounting method | Flush |
| Packaging type | Standard |
| Quantity | 1 |
| Voltage rating | 1250 V |
| Application | Semiconductor, DC Common bus, DC drives, power converters/rectifiers |
| Fuse type | Flush end GKN/75 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 170M4493?
1250 V / 400 A.
What does Class aR mean for the 170M4493?
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 170M4493 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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