Bussmann 170M5598 Class aR High Speed Fuse, 800A Square Body

Bussmann 170M5598 Class aR High Speed Fuse, 800A Square Body

The Bussmann 170M5598 is a Class aR high-speed square body fuse rated 800A RMS, engineered to protect semiconductors and power electronics from short-circuit and overcurrent conditions. Rated 700 Vac (UL) / 690 Vac (IEC) with a 100 kAIC interrupt rating, this fuse is built for demanding applications including DC common bus systems, DC drives, power converters/rectifiers, and reduced voltage starters. It carries UL Recognition and IEC ratings, along with RoHS and CE compliance, making it suitable for both North American and international power electronics designs.

Key Features

• Amperage Rating: 800A RMS current rating for high-current semiconductor and power converter circuits.
• Fuse Class: Class aR high-speed design, purpose-built for semiconductor protection rather than general branch-circuit duty.
• Voltage Rating: 700 Vac (UL), 690 Vac (IEC) for compatibility with both domestic and international system voltages.
• Interrupt Rating: 100 kAIC for reliable clearing of high fault currents.
• Square Body Construction: -BKN/90 type K indicator body style for micro-switch mounting; supplied as a Non Indicating fuse.
• Mounting Method: Flush mounting for standard fuse holder and disconnect installations.
• Watt Losses: 120W, a key input for enclosure thermal design and panel layout calculations.
• I2t Characteristics: Pre-Arc I2t of 245,000; Clearing I2t of 1,200,000 at 1000V and 1,550,000 at 1250V, for fuse coordination and let-through energy studies.

Certifications & Compliance

• UL Recognized
• IEC Rated
• RoHS Compliant
• CE Marked

Technical Specifications

• Amperage Rating: 800A
• Application: DC common bus, DC drives, power converters/rectifiers, reduced voltage starters
• Class: Class aR
• Current Rating: 800A RMS
• Clearing I2t: Clearing at 1000V: 1200000, Clearing at 1250V: 1550000
• Pre Arc I2t: 245000
• Voltage Rating: 700 Vac (UL), 690 Vac (IEC)
• Interrupt Rating: 100 kAIC
• Fuse Indicator: Non Indicating
• Mounting Method: Flush
• Watt Losses: 120W
• Packaging Type: Standard
• Product Type: Square body, -BKN/90 type K indicator for micro
• Product Details: Square body, -BKN/90 type K indicator for micro
• Product Length: 5.433 IN
• Product Height: 2.087 IN
• Product Width: .315 IN
• Product Weight: 1.6456 LB

Typical Applications

• DC Common Bus Systems
• DC Drives and Motor Control
• Power Converters and Rectifiers
• Reduced Voltage Starters
• Semiconductor Overcurrent Protection
• Industrial Power Electronics Enclosures

Why Bussmann?

Bussmann fuses are engineered for precise, fast-acting semiconductor protection where I2t coordination and interrupt performance matter most. The 170M5598's Class aR design, 100 kAIC interrupt rating, and UL Recognized / IEC Rated status give electrical professionals a documented, code-aware option for protecting power converters, drives, and DC bus systems. With RoHS and CE compliance built in, it supports both domestic and international power electronics designs without sacrificing coordination data needed for panel design.