Bussmann Eaton Series High-Speed Square Body Fuse, Class aR, 700V/690V

Bussmann 170M2671 Eaton High Speed Square Body Fuse, Class aR, 400A

The Bussmann 170M2671 is an Eaton series high speed square body fuse rated 700V (UL) / 690V (IEC) at 400A with a 200 kAIC interrupting rating, purpose-built for semiconductor protection in demanding industrial power circuits. This Class aR fuse (accompanied semiconductor protection) features blade end X blade end terminations on a square body with slotted offset bolted tags, built to DIN 43 620 dimensions for reliable fit in OEM and panel designs. UL Recognized and CE Marked, the 170M2671 delivers the documented clearing characteristics engineers need for coordinated, code-compliant overcurrent protection.

Key Features

• Amperage & Voltage Rating: 400A at 700V (UL) / 690V (IEC) for high-power circuit protection.
• High Interrupting Capacity: 200 kAIC rating provides robust fault-current interruption for demanding industrial systems.
• Utilization Category: Class aR (accompanied semiconductor protection), designed to be paired with a coordinated overcurrent device.
• Fuse Construction: Square body, slotted offset bolted tags with blade end X blade end terminations per DIN 43 620.
• Clearing Characteristics: Pre-arc I²t of 18000 and clearing I²t of 125000 at 660V for precise semiconductor protection coordination.
• Watt Losses: 70W.
• Compact Dimensions: 67 mm height x 100 mm length x 30 mm width, approximately 236.3 g weight.
• Application: Engineered specifically for semiconductor protection duty.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 400 A
• Application: semiconductor protection
• Certifications: UL Recognized
• Clearing I2t: 125000 at 660 V
• Compliances: CE Marked
• Fuse Shape: Square body, slotted offset bolted tags
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Pre Arc I2t: 18000
• Product Height: 67 mm
• Product Length/Depth: 100 mm
• Product Weight: 236.3333333 g
• Product Width: 30 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC
• Watt Losses: 70 W

Typical Applications

• Semiconductor Protection Circuits
• Industrial Power Electronics and Drives
• High-Speed Overcurrent Protection Systems
• Panelboard and Switchgear Protection
• Commercial and Industrial Electrical Installations

Why Bussmann?

Bussmann by Eaton is a recognized name in circuit protection, and the 170M2671 reflects that engineering standard with UL Recognized, CE Marked construction built to DIN 43 620 dimensions for reliable fit and performance. Its documented pre-arc and clearing I²t characteristics along with its 200 kAIC rating give engineers the coordination data needed for reliable, code-compliant high-speed semiconductor protection in professional power systems.