Bussmann 170M3472 Eaton Series High-Speed Square Body Fuse, 550A Class aR
The Bussmann 170M3472 is an Eaton series high-speed square body fuse engineered for semiconductor protection where rapid current interruption is critical. Rated 550A at 700V (UL) / 690V (IEC) AC with a 200 kAIC interrupt rating, this Class aR fuse is UL Recognized and CE marked for use in demanding power electronics, drive, and power conversion applications. Its square body design with flush end contacts supports compact, space-saving panel mounting in high-density enclosures.
Key Features
- Amperage Rating: 550A for high-current circuit protection.
- Voltage Rating: 700V (UL) / 690V (IEC) AC for use in medium-voltage AC power systems.
- Interrupt Rating: 200 kAIC high interrupting capacity for demanding fault-current conditions.
- Utilization Category: Class aR (accompanied semiconductor protection) for coordinated protection of power semiconductors.
- Fuse Shape: Square body with flush end contacts for compact, space-efficient installation.
- Current-Limiting Performance: Pre-arc I²t of 34,000 and clearing I²t of 230,000 at 660V for precise let-through energy control.
- Watt Losses: Rated at 89W.
- Application: Engineered for semiconductor protection in power conversion equipment.
Certifications & Compliance
- UL Recognized
- CE Marked
Technical Specifications
- Amperage Rating: 550 A
- Application: semiconductor protection
- Certifications: UL Recognized
- Clearing I2t: 230000 at 660 V
- Compliances: CE Marked
- Fuse Shape: Square body, flush end contacts
- Insulated Metal Gripping Lugs (IMGL): No
- Packaging Type: Standard
- Pre Arc I2t: 34000
- Product Height: 50 mm
- Product Length Depth: 60 mm
- Product Weight: 264.6666667 g
- Product Width: 43 mm
- Utilization Category: aR (accompanied semiconductor protection)
- Voltage Rating: 690 V
- Voltage Type: AC
- Watt Losses: 89 W
Typical Applications
- Semiconductor Protection in Power Electronics
- Variable Frequency Drives and Motor Drive Systems
- Power Conversion and Rectifier Equipment
- Industrial and Commercial Electrical Systems Requiring High-Speed Fault Clearing
Why Bussmann?
Bussmann by Eaton is a recognized leader in circuit protection, and the 170M3472 reflects that engineering standard with its UL Recognized, CE marked construction and precise current-limiting performance. Backed by documented pre-arc and clearing I²t data, this high-speed square body fuse delivers the coordinated, code-compliant protection that semiconductor and power electronics applications demand.
Manufacturer Resources
Product Specs
- Amperage Rating:
- 550 A
- Application:
- semiconductor protection
- Certifications:
- UL Recognized
- Class:
- Class aR
- Clearing I2t:
- 230000 at 660 V
- Compliances:
- CE Marked
- Fuse Indicator:
- Other
- Fuse Shape:
- Square body, flush end contacts
- Insulated Metal Gripping Lugs Imgl:
- No
- Interrupt Rating:
- 200 kAIC
- Mounting Method:
- Flush
- Packaging Type:
- Standard
- Pre Arc I2t:
- 34000
- Product Height:
- 50 mm
- Product Length Depth:
- 60 mm
- Product Weight:
- 264.6666667 g
- Product Width:
- 43 mm
- Utilization Category:
- aR (accompanied semiconductor protection)
- Voltage Rating:
- 690 V
- Voltage Type:
- AC
- Watt Losses:
- 89 W
- Product Group:
- Fuses
- Department:
- Electrical
- Product Subgroup:
- Other Fuses
- Product Type:
- Fuse
- Product Details:
- Fuse