Bussmann 170M4969 Eaton Series High-Speed Square Body Fuse, Class aR, 350A

Bussmann 170M4969 Eaton Series High-Speed Square Body Fuse, Class aR, 350A

The Bussmann 170M4969 is an Eaton series high-speed square body fuse engineered for semiconductor protection in demanding industrial power circuits. Rated 700V (UL) / 690V (IEC) with a 1000V AC voltage rating, 350A, and a 150 kAIC interrupt rating, this Class aR fuse is built to DIN 43 620 dimensions with a square body and slotted, center bolted tags for a secure, low-resistance connection. It is UL Recognized and CE Marked for use in accompanied semiconductor protection applications.

Key Features

• Square Body Design: Slotted, center bolted tags per DIN 43 620 for a reliable, low-resistance mounting connection.
• Voltage Rating: 700V (UL), 690V (IEC), with a system voltage rating of 1000V AC.
• Amperage Rating: 350A for demanding semiconductor protection circuits.
• Interrupt Rating: 150 kAIC for high fault-current industrial power systems.
• Utilization Category: Class aR (accompanied semiconductor protection).
• Let-Through Energy: Pre-arc I²t of 21,500 and clearing I²t of 130,000 at 1000V for coordinated circuit protection.
• Watt Losses: 65W rated power dissipation.
• Compact Footprint: 245 mm length, 142 mm width, 62 mm height, weighing approximately 217.67 g.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 350 A
• Application: semiconductor protection
• Certifications: UL Recognized
• Clearing I2t: 130000 at 1000 V
• Compliances: CE Marked
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (Imgl): No
• Packaging Type: Standard
• Pre Arc I2t: 21500
• Product Height: 62 mm
• Product Length Depth: 245 mm
• Product Weight: 217.6666667 g
• Product Width: 142 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1000 V
• Voltage Type: AC
• Watt Losses: 65 W

Typical Applications

• Semiconductor Protection in Power Electronics
• High-Speed Fault Current Interruption
• Industrial Power Conversion Equipment
• Motor Drives and Rectifier Circuits
• Panelboard and Switchgear Protection

Why Bussmann?

Bussmann by Eaton engineers this high-speed square body fuse to DIN 43 620 dimensions with a Class aR utilization category, a 150 kAIC interrupt rating, and UL Recognized, CE Marked compliance. For professionals protecting semiconductors and power conversion equipment, it delivers dependable, code-compliant fault current interruption where it matters most.