Bussmann 170M5539 Class aR High Speed Fuse, 700A Square Body

Bussmann 170M5539 Class aR High Speed Fuse, 700A Square Body

The Bussmann 170M5539 is a Class aR high speed fuse built in a square body US style construction for demanding power electronics protection. Rated 700A RMS at 700 Vac (UL) / 690 Vac (IEC) with a 150 kAIC interrupt rating, this fuse is engineered for DC common bus, DC drives, power converters/rectifiers, and reduced voltage starter applications where fast semiconductor protection is critical. It carries UL Recognized and IEC Rated listings, along with RoHS and CE compliance for use in modern industrial control systems.

Key Features

• Current Rating: 700A RMS for high-capacity circuit protection in power conversion equipment.
• Voltage Rating: 700 Vac (UL), 690 Vac (IEC) for use across both UL and IEC-rated systems.
• Fuse Class: Class aR high speed design for semiconductor and rectifier protection.
• Interrupt Rating: 150 kAIC to safely clear high fault currents.
• Fuse Indicator: Non Indicating design.
• Construction: Square body US style, -FKE/115 type K indicator for micro switch compatibility.
• I2t Ratings: Pre-Arc I2t of 130000 and Clearing I2t at 1000V of 770000 for coordinated protection.
• Watt Losses: 115W.

Certifications & Compliance

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

Technical Specifications

• Amperage Rating: 700A
• Application: DC common bus, DC drives, power converters/rectifiers, reduced voltage starters
• Class: Class aR
• Clearing I2t: Clearing at 1000V: 770000
• Current Rating: 700A RMS
• Fuse Indicator: Non Indicating
• Interrupt Rating: 150 kAIC
• Packaging Type: Standard
• Pre-Arc I2t: 130000
• Voltage Rating: 700 Vac (UL), 690 Vac (IEC)
• Watt Losses: 115W
• Product Type: Square body US style, -FKE/115 type K indicator for micro
• Product Details: Square body US style, -FKE/115 type K indicator for micro
• Product Length: 5.433 IN
• Product Height: 2.087 IN
• Product Weight: 1.6456 LB
• Product Width: .315 IN

Typical Applications

• DC Common Bus Systems
• DC Drives
• Power Converters and Rectifiers
• Reduced Voltage Starters
• Industrial Power Electronics Protection

Why Bussmann?

Bussmann high speed fuses are engineered for the demanding I2t coordination requirements of semiconductor and rectifier circuits, backed by UL Recognized and IEC Rated listings plus RoHS and CE compliance. The Class aR design, 150 kAIC interrupt rating, and square body US style construction make the 170M5539 a dependable choice for protecting DC drives, converters, and reduced voltage starters in professional industrial installations.