Bussmann 170M3211 High-Speed Square Body Fuse, 80A Class aR, 700V/690V

Bussmann 170M3211 High-Speed Square Body Fuse, 80A Class aR, 700V/690V

The Bussmann 170M3211 is an Eaton Bussmann series high-speed square body fuse engineered for demanding semiconductor protection applications. Rated 700V (UL) / 690V (IEC) AC and 80A with a 200 kAIC interrupt rating, this Class aR fuse (Utilization Category aR, accompanied semiconductor protection) features blade end x blade end terminals and a top fuse status indicator for fast visual verification. The square body construction conforms to DIN 43 620 dimensions, ensuring a reliable fit in standard high-speed fuse holders and disconnects.

Key Features

• Amperage Rating: 80A for semiconductor protection circuits.
• Voltage Rating: 700V (UL) / 690V (IEC) AC for high-voltage industrial power systems.
• Interrupt Rating: 200 kAIC high interrupting capacity for demanding fault-current environments.
• Class aR Protection: Accompanied semiconductor protection per Utilization Category aR, designed to work alongside a circuit breaker or overload device.
• Terminal Configuration: Blade end x blade end, square body with slotted center bolted tags for secure high-current connections.
• Status Indicator: Top fuse status indicator provides at-a-glance blown-fuse verification.
• Fuse Characteristics: Pre-arc I²t of 185 and clearing I²t of 1250 at 660V, with a clearing loss of 18.
• Physical Dimensions: 305 mm length/depth, 145 mm width, 65 mm height, 347 g weight.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 80 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 1250 at 660 V
• Clearing Loss: 18
• Compliances: CE Marked
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (Imgl): No
• Packaging Type: Standard
• Pre Arc I2t: 185
• Product Height: 65 mm
• Product Length Depth: 305 mm
• Product Weight: 347 g
• Product Width: 145 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC

Typical Applications

• Semiconductor Protection Circuits
• High-Speed Power Electronics
• Industrial Motor Drives and Converters
• Rectifier and Inverter Protection
• Panelboard and Switchgear Assemblies

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the 170M3211 reflects that engineering standard with its DIN 43 620 square body construction, 200 kAIC interrupt rating, and Class aR semiconductor protection design. Backed by IEC rating and CE marking, this fuse delivers the dependable, code-compliant performance professionals expect for critical power electronics protection.