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170M4956 Eaton Bussmann 1000V 400A Class aR High Speed Fuse
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Eaton Bussmann 170M4956 — 1000V 400A Class aR high speed fuse, 125 kAIC interrupting. Protects semiconductors in drives, rectifiers and inverters.
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170M4956 Eaton Bussmann 1000V 400A Class aR High Speed Fuse
At a Glance
- 1000 V (IEC) rated voltage, 400 A rated current
- 125 kAIC interrupting rating
- Class aR time-current characteristic
- Centre fuse status indicator
The Eaton Bussmann 170M4956 is a square body fuse with 1000 V (IEC) rated voltage, 400 A rated current, 125 kAIC interrupting capacity, carrying a Class aR time-current characteristic. Construction is centre fuse status indicator.
Specifications
General specifications
| UPC | 051712679480 |
| EAN | 5027590455091 |
| Product Length/Depth | 73 mm |
| Product Height | 52 mm |
| Product Width | 170 mm |
| Product Weight | 576 g |
| Global Catalog | 170M4956 |
Product specifications
| Amperage Rating | 400 A |
| Breaking capacity | 125 kA |
| Fuse indicator | Centre fuse status indicator |
| Insulated metal gripping lugs (IMGL) | No |
| Utilization category | aR (accompanied semiconductor protection) |
| Voltage type | AC/DC |
| Fuse size | 1 |
| Rated voltage AC | 1000 V |
| Center-to-center distance of connections | 74.6 mm |
| Current type | AC |
| Mounting dimension | M8 |
| Class | Class aR |
| Clearing (I2T) | 185000 at 1000 V |
| Watt losses | 70 W |
| Fuse shape | Square body, flush end contacts |
| Pre arc (I2T) | 31000 |
| Color | None |
| Interrupt rating | 125 kAIC |
| Fitted with: | Type K Indicator for micro |
| Construction size | 1 |
| Mounting method | Flush |
| Packaging type | Standard |
| Voltage rating | 1000 V (IEC) |
| Type | Fuse |
| Application | Semiconductor, DC Common bus, DC drives, power converters/rectifiers |
| Fuse type | Flush end BKN/Type K Indicator for Micro |
| Fuse system (according to IEC 60269) | IEC 60269-4 flush end connections type A |
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 170M4956?
1000 V (IEC) / 400 A, with a 125 kAIC interrupting rating.
How much fault current can the 170M4956 interrupt?
125 kAIC. The available fault current at the installation point must not exceed this value.
What does Class aR mean for the 170M4956?
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 170M4956 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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