Bussmann 170M3066 Eaton Series High Speed Square Body Fuse, 250A Class aR

Bussmann 170M3066 Eaton Series High Speed Square Body Fuse, 250A Class aR

The Bussmann 170M3066 is an Eaton series high speed square body fuse engineered for semiconductor protection, rated 250A with a voltage rating of 1250V (IEC) / 1300V (UL) and a 690V AC continuous rating. Backed by a 200 kAIC interrupting rating and Class aR (accompanied) utilization category, this fuse uses a blade end X blade end terminal configuration built to the DIN 43 620 standard. A top fuse status indicator provides quick visual confirmation of fuse condition, making it well suited for power electronics and industrial semiconductor protection applications.

Key Features

• Compact Square Body Design: Square body construction with slotted, center bolted tags and blade end X blade end terminals per DIN 43 620 for reliable mounting.
• High Speed Semiconductor Protection: Class aR utilization category (accompanied semiconductor protection) delivers fast, precise clearing for sensitive power electronic components.
• Electrical Ratings: Rated 250A at 1250V (IEC) / 1300V (UL), with a 690V AC voltage rating and 200 kAIC interrupting capacity for demanding industrial circuits.
• Clearing Characteristics: Pre-Arc I2t of 4200 and Clearing I2t of 28500 at 660V, with a Clearing Loss of 40, supporting predictable coordination with upstream and downstream devices.
• Top Fuse Status Indicator: Built-in visual indicator on top of the fuse body allows technicians to quickly identify a blown fuse without disconnecting circuits.
• Compact Dimensions: Measures 305 mm in length/depth, 145 mm in width, and 65 mm in height, weighing approximately 310 g.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 250 A
• Application: semiconductor protection
• Certifications: UL Recognized
• Clearing I2t: 28500 at 660 V
• Clearing Loss: 40
• Compliances: CE Marked
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Pre Arc I2t: 4200
• Product Height: 65 mm
• Product Length Depth: 305 mm
• Product Weight: 310 g
• Product Width: 145 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC

Typical Applications

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

Why Bussmann?

Bussmann by Eaton engineers this high speed square body fuse with precise clearing characteristics, a DIN 43 620 compliant blade-to-blade design, and UL Recognized, CE Marked construction, giving electrical professionals a dependable component for protecting sensitive semiconductor and power electronic equipment in demanding industrial environments.