Bussmann 170M4831 Eaton Series High Speed Square Body Fuse, 125A Class aR

Bussmann 170M4831 Eaton Series High Speed Square Body Fuse, 125A Class aR

The Bussmann 170M4831 is an Eaton series high speed square body fuse engineered for semiconductor protection in demanding industrial power electronics applications. Rated 700V (UL) / 690V (IEC) with a 125A amperage rating and a 125 kAIC interrupt rating, this Class aR fuse uses a blade end x DIN 43-620 blade end connection for reliable mounting in high speed fuse holders. Backed by IEC Rated and CE Marked compliance, it is built to protect sensitive semiconductor devices from short-circuit and overcurrent conditions.

Key Features

• Utilization Category: Class aR (accompanied semiconductor protection) for use alongside other overcurrent protection to safeguard semiconductor devices.
• Connection Type: Blade end x DIN 43-620 blade end connection for secure mounting per DIN 43 620.
• Electrical Rating: 125A at 700V (UL) / 690V (IEC), with a 125 kAIC interrupt rating for high fault-current environments.
• Voltage Rating: 1000V AC voltage rating as tested per manufacturer specification.
• Clearing I2t: 11500 at 1000V, with a Pre-Arc I2t of 1500, for predictable current-limiting performance.
• Watt Losses: 33W rated power loss under normal operating conditions.
• Fuse Shape: Square body with slotted center bolted tags for straightforward busbar-style connections.
• Dimensions: 66 mm height x 233 mm length/depth x 140 mm width, weighing approximately 234.8333333 g.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 125 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 11500 at 1000 V
• Compliances: CE Marked
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (IMGL): No
• Packaging Type: Standard
• Pre Arc I2t: 1500
• Product Height: 66 mm
• Product Length Depth: 233 mm
• Product Weight: 234.8333333 g
• Product Width: 140 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1000 V
• Voltage Type: AC
• Watt Losses: 33 W

Typical Applications

• Semiconductor Protection in Power Electronics
• Motor Drive and Rectifier Circuit Protection
• Industrial Switchgear and Panelboard Overcurrent Protection
• High Speed Fuse Holder Assemblies
• Power Conversion and Control Equipment

Why Bussmann?

Bussmann by Eaton engineers high speed square body fuses like the 170M4831 to deliver dependable, code-compliant overcurrent protection for demanding semiconductor and power electronics applications. With IEC Rated and CE Marked compliance plus a defined Class aR utilization category, this fuse gives professionals a trusted component for protecting sensitive equipment in industrial power systems.