Bussmann 170M2669 Eaton Series High-Speed Square Body Fuse, Class aR, 315A

Bussmann 170M2669 Eaton Series High-Speed Square Body Fuse, Class aR, 315A

The Bussmann 170M2669 is an Eaton Bussmann series high-speed square body fuse engineered for semiconductor protection in demanding industrial power circuits. Rated 700V (UL) / 690V (IEC) and 315A with a 200 kAIC interrupt rating, this Class aR fuse is built to DIN 43 620 dimensions with blade end x blade end connections for direct mounting into compatible fuse holders. Its accompanied semiconductor protection design (Utilization Category aR) delivers fast-acting overcurrent protection for power electronics, drives, and converter circuits where precise current limiting is critical.

Key Features

• Square Body Design: Square body fuse with slotted, offset bolted tags and blade end x blade end connections for secure, code-compliant mounting.
• Amperage Rating: 315A continuous current rating suited for high-capacity semiconductor protection circuits.
• Voltage Rating: Dual-rated 700V (UL) and 690V (IEC) for flexibility across UL and IEC-governed installations.
• Interrupting Rating: 200 kAIC interrupt capacity provides robust short-circuit protection in high fault-current environments.
• Utilization Category aR: Class aR accompanied semiconductor protection design for use alongside other overcurrent devices.
• I2t Characteristics: Pre-arc I2t of 10,000 and clearing I2t of 68,500 at 660V for predictable coordination with semiconductor components.
• Compact Dimensions: Measures 98 mm length/depth x 51 mm height x 28 mm width, weighing 211.833 g.
• Watt Losses: 55W watt loss rating for thermal design planning in enclosed equipment.

Certifications & Compliance

• IEC Rated
• RoHS Compliant

Technical Specifications

• Amperage Rating: 315 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 68500 at 660 V
• Compliances: RoHS Compliant
• Fuse Shape: Square body, slotted offset bolted tags
• Insulated Metal Gripping Lugs (IMGL): No
• Pre Arc I2t: 10000
• Product Height: 51 mm
• Product Length Depth: 98 mm
• Product Weight: 211.833 g
• Product Width: 28 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC
• Watt Losses: 55 W

Typical Applications

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

Why Bussmann?

As part of the Eaton Bussmann series, the 170M2669 delivers the precise, coordinated overcurrent protection that semiconductor and power electronics applications require. Built to DIN 43 620 dimensions and IEC rated with RoHS compliant construction, it offers dependable, code-compliant performance for professional industrial electrical work.