Bussmann 170M2758 Eaton Series High-Speed Square Body Fuse, Class aR

Bussmann 170M2758 Eaton Series High-Speed Square Body Fuse, Class aR

The Bussmann 170M2758 is an Eaton Bussmann series high-speed square body fuse engineered for semiconductor protection in demanding industrial power systems. Rated 700V (UL) / 690V (IEC) and 25A with a 200 kAIC interrupting rating, this Class aR fuse features a square body with blade end x blade end contacts built to DIN 43 620 dimensions. It is IEC Rated and CE Marked for use in coordinated semiconductor protection schemes.

Key Features

• Amperage Rating: 25A rating delivers precise overcurrent protection sized for semiconductor circuit applications.
• Dual Voltage Rating: Rated 700V (UL) and 690V (IEC), with a 690V AC voltage rating, for use across both North American and international standards.
• High Interrupting Capacity: 200 kAIC interrupting rating provides reliable performance against high fault currents.
• Square Body Construction: Blade end x blade end contact configuration built to DIN 43 620 dimensions with flush end contacts for straightforward mounting.
• Utilization Category aR: Classified for accompanied semiconductor protection, coordinating with other protective devices in the circuit.
• Low Watt Losses: 6W watt loss supports efficient operation with minimal heat generation.
• Clearing Characteristics: Clearing I2t of 130 at 660V and pre-arc I2t of 19 for precise let-through coordination in semiconductor protection.
• Compact Dimensions: Measures 77 mm in height, 163 mm in width, and 75 mm in length/depth, weighing 211 g.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 25 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 130 at 660 V
• Compliances: CE Marked
• Fuse Shape: Square body, flush end contacts
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Pre-Arc I2t: 19
• Product Height: 77 mm
• Product Length Depth: 75 mm
• Product Weight: 211 g
• Product Width: 163 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC
• Watt Losses: 6 W

Typical Applications

• Semiconductor Protection
• Power Electronics and Drive Systems
• Rectifier and Converter Circuits
• Industrial Motor Control Systems
• Panelboard and Switchgear Installations

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the 170M2758 reflects that reputation with its IEC Rated and CE Marked compliance, precise clearing and pre-arc I2t characteristics, and DIN 43 620 square body construction. For professionals specifying semiconductor protection in industrial power systems, this Class aR fuse delivers coordinated, code-compliant performance.