Bussmann 170M3270 Eaton Series High Speed Square Body Fuse, Class aR, 450A

Bussmann 170M3270 Eaton Series High Speed Square Body Fuse, Class aR, 450A

The Bussmann 170M3270 is an Eaton series high speed square body fuse engineered for semiconductor protection in demanding industrial power circuits. Rated 1250V (IEC) / 1300V (UL) with a 450A amperage rating and a 200 kAIC interrupt rating, this Class aR fuse is designed as an accompanied semiconductor protection device per DIN 43 620 standards. The fuse features a square body with slotted, center-bolted blade end X blade end tags for reliable high-current connections. Built to UL Recognized standards and CE marked for compliance, the 170M3270 delivers dependable overcurrent protection for critical power electronics applications.

Key Features

• Amperage Rating: 450A for high-current semiconductor protection circuits.
• Voltage Rating: 1250V (IEC) / 1300V (UL), with a 690V voltage rating classification, for demanding power systems.
• Interrupt Rating: 200 kAIC short-circuit interrupting capacity for maximum protection margin.
• Fuse Class: Class aR utilization category (accompanied semiconductor protection) per DIN 43 620.
• Connection Type: Blade end X blade end configuration with square body, slotted center-bolted tags.
• Clearing Characteristics: Clearing I2t of 140000 at 660V and pre-arc I2t of 21000 for precise fuse coordination.
• Clearing Loss: Rated clearing loss of 65 for efficient thermal performance.
• Application: Purpose-built for semiconductor protection in power electronics assemblies.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 450 A
• Application: semiconductor protection
• Certifications: UL Recognized
• Clearing I2t: 140000 at 660 V
• Clearing Loss: 65
• Compliances: CE Marked
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Pre Arc I2t: 21000
• Product Height: 65 mm
• Product Length Depth: 305 mm
• Product Weight: 340.5 g
• Product Width: 145 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC

Typical Applications

• Semiconductor Protection Circuits
• Industrial Power Electronics
• Motor Drive and Rectifier Protection
• High-Speed Overcurrent Protection Systems
• Power Conversion and Switching Equipment

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the 170M3270 reflects that heritage with UL Recognized construction and CE marked compliance for global applications. Its precise clearing I2t and pre-arc I2t characteristics, combined with a 200 kAIC interrupt rating, make it a dependable choice for protecting sensitive semiconductor equipment in demanding industrial environments. The Class aR design ensures coordinated, code-compliant performance for professional power electronics installations.