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Bussmann 170M3975 High-Speed Square Body Fuse, Class aR, 400A
The Bussmann 170M3975 is an Eaton Bussmann series high-speed square body fuse engineered for semiconductor protection in demanding industrial power circuits. Rated 700V (UL) / 690V (IEC) with a 400A amperage rating and a 150 kAIC interrupting rating, this Class aR fuse is built to the DIN 43 620 square body configuration with slotted, center-bolted tags for secure busbar mounting. Its aR utilization category (accompanied semiconductor protection) makes it well suited to fast-clearing protection of power semiconductors in industrial power conversion equipment.
Key Features
- Amperage Rating: 400A rating for demanding industrial semiconductor protection circuits.
- Voltage Rating: Rated 700V (UL) and 690V (IEC), with a 1000V AC voltage rating.
- Interrupting Rating: 150 kAIC interrupting capacity for reliable fault clearing.
- Square Body Construction: DIN 43 620 square body fuse shape with slotted, center-bolted tags for secure connection.
- Utilization Category aR: Accompanied semiconductor protection for fast, current-limiting response.
- Fast Clearing Performance: Pre-arc I2t of 42000 and clearing I2t of 250000 at 1000V for precise coordination in semiconductor circuits.
- Watt Losses: 65W power dissipation rating.
Certifications & Compliance
- IEC Rated
- CE Marked
Technical Specifications
- Amperage Rating: 400 A
- Application: semiconductor protection
- Certifications: IEC Rated
- Clearing I2t: 250000 at 1000 V
- Compliances: CE Marked
- Fuse Shape: Square body, slotted center bolted tags
- Insulated Metal Gripping Lugs (IMGL): No
- Packaging Type: Standard
- Pre Arc I2t: 42000
- Product Height: 61 mm
- Product Length Depth: 138 mm
- Product Weight: .001 g
- Product Width: 43 mm
- Utilization Category: aR (accompanied semiconductor protection)
- Voltage Rating: 1000 V
- Voltage Type: AC
- Watt Losses: 65 W
Typical Applications
- Semiconductor Protection in Industrial Power Circuits
- Variable Frequency Drives and Power Conversion Equipment
- Rectifier and Inverter Circuit Protection
- High-Speed Fault Current Limiting Applications
- Industrial and Commercial Electrical Power Systems
Why Bussmann?
Bussmann by Eaton is a recognized name in circuit protection, and the 170M3975 reflects that standard with its DIN 43 620 square body construction, defined pre-arc and clearing I2t characteristics, and IEC-rated, CE-marked compliance. For engineers specifying semiconductor protection in demanding industrial applications, this Class aR fuse delivers the fast-clearing, high-interrupting-capacity performance professionals rely on.
Manufacturer Resources
Product Specs
- Amperage Rating:
- 400 A
- Application:
- semiconductor protection
- Certifications:
- IEC Rated
- Class:
- Class aR
- Clearing I2t:
- 250000 at 1000 V
- Compliances:
- CE Marked
- Fuse Indicator:
- Other
- Fuse Shape:
- Square body, slotted center bolted tags
- Insulated Metal Gripping Lugs Imgl:
- No
- Interrupt Rating:
- 150 kAIC
- Mounting Method:
- DIN 43 620
- Packaging Type:
- Standard
- Pre Arc I2t:
- 42000
- Product Height:
- 61 mm
- Product Length Depth:
- 138 mm
- Product Weight:
- .001 g
- Product Width:
- 43 mm
- Utilization Category:
- aR (accompanied semiconductor protection)
- Voltage Rating:
- 1000 V
- Voltage Type:
- AC
- Watt Losses:
- 65 W
- Product Group:
- Fuses
- Department:
- Electrical
- Product Subgroup:
- Other Fuses
- Product Type:
- Fuse
- Product Details:
- Fuse