Bussmann 170M3439 Eaton Series High Speed Square Body Fuse, Class aR, 63A

Bussmann 170M3439 Eaton Series High Speed Square Body Fuse, Class aR, 63A

The Bussmann 170M3439 Eaton series high speed square body fuse delivers Class aR (accompanied semiconductor protection) performance in a compact, flush end contact square body design. Rated 700V (UL) / 690V (IEC) at 63A with a 100 kAIC interrupt rating, this fuse is engineered for fast-acting protection of semiconductor devices in demanding power electronics applications. IEC rated and CE marked, it is built for reliable coordination in industrial circuits requiring dedicated semiconductor protection.

Key Features

• Voltage Rating: 700V (UL) / 690V (IEC) for high-voltage circuit protection.
• Amperage Rating: 63A for reliable overcurrent protection in semiconductor circuits.
• Interrupt Rating: 100 kAIC high interrupting capacity for demanding fault conditions.
• Fuse Shape: Square body with flush end contacts for compact bus-bar mounting.
• Utilization Category: Class aR (accompanied semiconductor protection) for use alongside dedicated semiconductor protection schemes.
• Clearing I2t: 1300 at 1000V, 1750 at 1250V for precise let-through coordination.
• Pre-Arc I2t: 215 for fast-acting semiconductor protection response.
• Watt Losses: 20W power dissipation rating.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 63 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 1300 at 1000 V, 1750 at 1250 V
• Compliances: CE Marked
• Fuse Shape: Square body, flush end contacts
• Insulated Metal Gripping Lugs Imgl: No
• Packaging Type: Standard
• Pre Arc I2t: 215
• Product Height: 60 mm
• Product Length Depth: 92 mm
• Product Weight: .885 g
• Product Width: 163 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1250 V
• Voltage Type: AC
• Watt Losses: 20 W

Typical Applications

• Semiconductor Protection
• Power Electronics and Variable Frequency Drive Systems
• Industrial Motor Control Circuits
• High-Speed Fault Current Interruption
• Panelboard and Switchgear Protection

Why Bussmann?

Bussmann by Eaton engineers this 170M3439 high speed square body fuse for the exacting demands of semiconductor protection, combining a Class aR utilization rating with a 100 kAIC interrupt rating and defined clearing and pre-arc I2t values for precise coordination. IEC rated and CE marked construction supports code-compliant performance in professional industrial and power electronics installations where dependable, fast-acting overcurrent protection is essential.