Bussmann 170M3272 Eaton Series High-Speed Square Body Fuse, Class aR, 550A

Bussmann 170M3272 Eaton Series High-Speed Square Body Fuse, Class aR, 550A

The Bussmann 170M3272 is an Eaton Bussmann series high-speed square body fuse engineered for semiconductor protection in demanding industrial power circuits. Rated 700V (UL) and 690V (IEC) with a 550A amperage rating and a 200 kAIC interrupting capacity, this Class aR fuse delivers accompanied semiconductor protection where fast clearing and high fault-current handling are critical. The square body design features slotted center bolted tags with blade end x blade end connections and conforms to the DIN 43 620 dimensional standard, making it a dependable choice for coordinated protection in drive and power conversion applications.

Key Features

• Amperage Rating: 550A rating for high-speed semiconductor protection in AC power circuits.
• Voltage Rating: 700V (UL) / 690V (IEC) AC, suited for high-voltage industrial power systems.
• Interrupting Rating: 200 kAIC, providing dependable protection against high fault currents.
• Utilization Category: Class aR (accompanied semiconductor protection) for coordinated device protection.
• Fuse Shape: Square body with slotted center bolted tags and blade end x blade end connection for secure mounting.
• Dimensional Standard: DIN 43 620 configuration for standardized fit in semiconductor fuse holders.
• Clearing Characteristics: Clearing I2t of 230000 at 660V and Pre-Arc I2t of 34000 for precise protection coordination.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 550 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 230000 at 660 V
• Clearing Loss: 75
• Compliances: CE Marked
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (Imgl): No
• Packaging Type: Standard
• Pre Arc I2t: 34000
• Product Height: 65 mm
• Product Length Depth: 305 mm
• Product Weight: 346 g
• Product Width: 145 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC

Typical Applications

• Semiconductor Protection in Power Conversion Equipment
• Variable Frequency Drives and Motor Controllers
• Industrial Power Distribution Systems
• High-Speed Circuit Protection for Rectifiers and Converters
• Coordinated Protection with Downstream Semiconductor Devices

Why Bussmann?

Bussmann by Eaton has long been a trusted name in high-speed semiconductor fuse protection, and the 170M3272 reflects that standard with rugged square body construction, precise clearing characteristics, and IEC-rated, CE-marked compliance. For engineers specifying Class aR protection to DIN 43 620 dimensions, this fuse delivers the coordinated, code-compliant performance that professional electrical and industrial power systems demand.