Bussmann 170M2665 Class aR Semiconductor Fuse, 125A, 690V

Bussmann 170M2665 Class aR Semiconductor Fuse, 125A, 690V

The Bussmann 170M2665 is a UL Recognized Class aR semiconductor fuse for accompanied overcurrent and short-circuit protection of power semiconductor devices such as SCRs, diodes, and thyristors. Rated 125A at 690V AC with a 200 kAIC interrupt rating, it uses blade end x blade end terminals on a square body with slotted offset bolted tags, mounted per DIN 43 620. As a Utilization Category aR device, it works alongside a circuit breaker rather than providing stand-alone protection, suiting industrial power electronics use.

Key Features

• Amperage Rating: 125A for reliable semiconductor circuit protection.
• Voltage Rating: 690V AC for demanding industrial power systems.
• Interrupt Rating: 200 kAIC for high fault-current capability.
• Utilization Category aR: accompanied semiconductor protection, paired with a circuit breaker or other device for full overcurrent coverage.
• Connection: Blade end x blade end terminals mounted per DIN 43 620 for standardized holder compatibility.
• Fuse Shape: Square body with slotted offset bolted tags for a secure connection.
• Watt Losses: 25W rated power loss.
• Clearing / Pre-Arc I2t: Clearing I2t of 6950 at 660V and Pre-Arc I2t of 1000 for predictable let-through coordination.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 125 A
• Application: semiconductor protection
• Certifications: UL Recognized
• Class: Class aR
• Clearing I2t: 6950 at 660 V
• Compliances: CE Marked
• Connection: Blade end x blade end
• Fuse Indicator: Other
• Fuse Shape: Square body, slotted offset bolted tags
• Insulated Metal Gripping Lugs (IMGL): No
• Interrupt Rating: 200 kAIC
• Mounting Method: DIN 43 620
• Pre Arc I2t: 1000
• Product Height: 67 mm
• Product Length Depth: 100 mm
• Product Weight: 220.8333333 g
• Product Width: 30 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC
• Watt Losses: 25 W
• Product Type: Fuse

Typical Applications

• Semiconductor Device Protection (SCRs, Diodes, Thyristors)
• Variable Frequency Drives and Motor Control Systems
• Power Electronics and Rectifier Circuits
• Industrial Panelboards and Power Distribution Equipment
• Accompanied Overcurrent Protection Alongside Circuit Breakers

Why Bussmann?

Bussmann fuses are built for dependable performance in demanding industrial environments, and the 170M2665 pairs a 200 kAIC interrupt rating with UL Recognized and CE Marked compliance. Its Class aR construction and coordinated Clearing and Pre-Arc I2t values support precise, code-compliant semiconductor protection when paired with the appropriate overcurrent device.