Bussmann 170M3443 Eaton Series High-Speed Square Body Fuse, Class aR, 700V, 160A

Bussmann 170M3443 Eaton Series High-Speed Square Body Fuse, Class aR, 700V, 160A

The Bussmann 170M3443 is an Eaton series high-speed square body fuse engineered for semiconductor protection in demanding power electronics applications. Rated 700V (UL) / 690V (IEC) with a 160A amperage rating and 100 kAIC interrupting capacity, this Class aR fuse uses a square body construction with flush end contacts for reliable, high-speed clearing. Backed by UL Recognized and CE Marked compliance, it delivers dependable overcurrent protection for demanding industrial and power electronics circuits.

Key Features

• Compact Dimensions: Square body fuse measuring 90 mm in height, 152 mm in width, and 62 mm in length/depth, weighing 370 g.
• Fuse Shape: Square body construction with flush end contacts for secure, low-resistance mounting.
• Voltage Rating: Rated 700V (UL) / 690V (IEC), with a 1250 V AC voltage rating for demanding circuit applications.
• Amperage Rating: 160A rating delivers robust current-carrying capacity for high-speed protection.
• Interrupting Rating: 100 kAIC interrupting capacity supports use in high fault-current environments.
• Utilization Category: Class aR (accompanied semiconductor protection) for coordinated use alongside semiconductor devices.
• Clearing I2t: 16000 at 1000 V and 21000 at 1250 V, with a Pre-Arc I2t of 2600 for precise circuit coordination.
• Watt Losses: Low 30 W watt-loss rating supports efficient thermal performance.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 160 A
• Application: semiconductor protection
• Certifications: UL Recognized
• Clearing I2t: 16000 at 1000 V, 21000 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: 2600
• Product Height: 90 mm
• Product Length/Depth: 62 mm
• Product Weight: 370 g
• Product Width: 152 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1250 V
• Voltage Type: AC
• Watt Losses: 30 W

Typical Applications

• Semiconductor Protection Circuits
• Power Electronics and Drive Systems
• Rectifier and Converter Protection
• Industrial Motor Control Systems
• High-Speed Overcurrent Protection

Why Bussmann?

Bussmann series fuses from Eaton are engineered for precise, high-speed protection of sensitive semiconductor devices in demanding industrial environments. With UL Recognized and CE Marked compliance, the 170M3443 delivers the reliable, code-compliant performance electrical professionals depend on for critical power electronics and drive protection applications.