Bussmann 170M3447 Eaton Series High-Speed Square Body Fuse, Class aR

Bussmann 170M3447 Eaton Series High-Speed Square Body Fuse, Class aR

The Bussmann 170M3447 is an Eaton Bussmann series high-speed square body fuse engineered for coordinated semiconductor protection. Rated 700V (UL) / 690V (IEC), 350A, with a 100 kAIC interrupting rating, this Class aR fuse uses a square body shape with flush end contacts for compact panel mounting in demanding power conversion and drive applications.

Key Features

• Voltage Rating: 700V (UL) / 690V (IEC) AC rating supports use across UL and IEC-compliant installations.
• Amperage Rating: 350A continuous current rating for demanding industrial power circuits.
• Interrupting Rating: 100 kAIC high interrupting capacity for safe, reliable fault clearing.
• Class aR Utilization: Utilization category aR (accompanied semiconductor protection) coordinates with backup overcurrent devices to protect power semiconductors.
• Square Body, Flush End Contacts: Compact square body fuse shape with flush end contacts simplifies mounting in space-constrained panels.
• Semiconductor Protection Application: Purpose-built for semiconductor protection in high-speed switching and power conversion equipment.
• Watt Losses: 65W power dissipation rating supports accurate enclosure thermal design.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 350 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 165000 at 1000 V, 220000 at 1250 V
• Compliances: CE Marked
• Fuse Shape: Square body, flush end contacts
• Insulated Metal Gripping Lugs (Imgl): No
• Packaging Type: Standard
• Pre Arc I2t: 27000
• Product Height: 60 mm
• Product Length Depth: 92 mm
• Product Weight: .885 g
• Product Width: 163 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1250 V
• Voltage Type: AC
• Watt Losses: 65 W

Typical Applications

• Semiconductor Protection Circuits
• Power Conversion and Drive Systems
• Industrial High-Speed Switching Equipment
• Panelboards and Power Distribution Assemblies Requiring Class aR Coordination

Why Bussmann?

Bussmann by Eaton engineers this high-speed square body fuse to IEC-rated, CE-marked standards, delivering a 100 kAIC interrupting rating and Class aR semiconductor coordination for professional power conversion and industrial drive installations. The square body, flush-end-contact design and documented 700V (UL) / 690V (IEC), 350A ratings give specifiers a dependable, code-compliant component for coordinated semiconductor protection.