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

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

The Bussmann 170M Series is a line of Eaton high-speed square body fuses engineered for semiconductor protection in demanding industrial power systems, available in ratings from 630A to 900A. Rated 1100V AC with an interrupt rating up to 100 kAIC, these Class aR (accompanied semiconductor protection) fuses feature a square body design with slotted center bolted tags built to DIN 43620 dimensional standards. Their high-speed clearing characteristics and defined let-through energy values make the 170M Series well suited for coordinated protection of semiconductor devices against short-circuit fault currents across the full amperage range.

Key Features

• Amperage Rating: Available from 630A to 900A for high-current semiconductor protection applications.
• Voltage Rating: 1100V AC suited for high-voltage AC power distribution systems.
• Fuse Shape: Square body with slotted center bolted tags for secure, low-resistance terminal connections.
• Utilization Category: Class aR (accompanied semiconductor protection), designed to protect semiconductor devices from short-circuit currents while overload duty is handled by a coordinated device.
• Interrupt Rating: Up to 100 kAIC delivers high short-circuit interrupting capacity for demanding fault conditions.
• Let-Through Energy: Defined pre-arc and clearing I²t values across the 170M Series enable precise current-limiting coordination with upstream and downstream devices.
• Dimensional Standard: Built to DIN 43620 square-body fuse dimensions for mounting compatibility.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Fuse Indicator: Other
• Mounting Method: DIN 43 620
• Insulated Metal Gripping Lugs (IMGL): No
• Voltage Type: AC

Typical Applications

• Semiconductor Device Protection
• Power Electronics and Rectifier Circuits
• Industrial Motor Drive Protection
• High-Speed AC Power Distribution Protection

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the 170M Series reflects that engineering standard with IEC-rated, CE-marked square body construction built to DIN 43620 specifications. For professionals protecting semiconductor equipment and power electronics across a range of amperage ratings, this high-speed fuse family delivers coordinated, code-compliant overcurrent protection engineered for reliable performance.