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Bussmann 170M3245 High Speed Square Body Fuse, Class aR
The Bussmann 170M3245 is an Eaton Bussmann series high speed square body fuse engineered for semiconductor protection in demanding power electronics applications. Rated 700V (UL) and 690V (IEC) with a 250A amperage rating and 100 kAIC interrupting capacity, this Class aR fuse meets the DIN 43 620 square body configuration with slotted center bolted tags. It is UL Recognized and CE Marked, delivering fast-clearing protection for accompanied semiconductor devices.
Key Features
- Voltage Rating: 700V (UL) and 690V (IEC) for high-voltage power electronics circuits.
- Amperage Rating: 250A for reliable current-carrying capacity in semiconductor protection circuits.
- Interrupting Rating: 100 kAIC for high fault-current interrupting performance.
- Fuse Shape: Square body with slotted center bolted tags per DIN 43 620 for standardized mounting.
- Utilization Category: Class aR (accompanied semiconductor protection) for fast, high-speed clearing.
- Clearing I2t: 54500 at 1000V and 73000 at 1250V for predictable let-through energy coordination.
- Pre-Arc I2t: 9200 for precise selective coordination with upstream and downstream devices.
- Watt Losses: 55W rated power dissipation for thermal system design.
Certifications & Compliance
- UL Recognized
- CE Marked
Technical Specifications
- Amperage Rating: 250 A
- Application: Semiconductor protection
- Certifications: UL Recognized
- Clearing I2t: 54500 at 1000 V, 73000 at 1250 V
- Compliances: CE Marked
- Fuse Shape: Square body, slotted center bolted tags
- Insulated Metal Gripping Lugs (IMGL): No
- Packaging Type: Standard
- Pre-Arc I2t: 9200
- Product Height: 65 mm
- Product Length/Depth: 305 mm
- Product Weight: 73 g
- Product Width: 145 mm
- Utilization Category: aR (accompanied semiconductor protection)
- Voltage Rating: 1250 V
- Voltage Type: AC
- Watt Losses: 55 W
Typical Applications
- Semiconductor Protection Circuits
- Power Electronics and Drive Systems
- Motor Control and Inverter Applications
- Industrial Power Distribution Equipment
- High Speed Fault Current Interruption
Why Bussmann?
Bussmann by Eaton is a recognized name in circuit protection, and the 170M3245 reflects that standard with its UL Recognized, CE Marked construction and DIN 43 620 square body design. With a 100 kAIC interrupting rating, Class aR utilization category, and defined I2t clearing characteristics, this fuse delivers dependable, code-compliant protection for semiconductor devices in professional power electronics installations.
Manufacturer Resources
Product Specs
- Amperage Rating:
- 250 A
- Application:
- semiconductor protection
- Certifications:
- UL Recognized
- Class:
- Class aR
- Clearing I2t:
- 54500 at 1000 V, 73000 at 1250 V
- Compliances:
- CE Marked
- Fuse Indicator:
- Other
- Fuse Shape:
- Square body, slotted center bolted tags
- Insulated Metal Gripping Lugs Imgl:
- No
- Interrupt Rating:
- 100 kAIC
- Mounting Method:
- DIN 43 620
- Packaging Type:
- Standard
- Pre Arc I2t:
- 9200
- Product Height:
- 65 mm
- Product Length Depth:
- 305 mm
- Product Weight:
- 73 g
- Product Width:
- 145 mm
- Utilization Category:
- aR (accompanied semiconductor protection)
- Voltage Rating:
- 1250 V
- Voltage Type:
- AC
- Watt Losses:
- 55 W
- Product Group:
- Fuses
- Department:
- Electrical
- Product Subgroup:
- Other Fuses
- Product Type:
- Fuse
- Product Details:
- Fuse