Bussmann 170M4069 High-Speed Square Body Fuse, Class aR, 900A, 690V

Bussmann 170M4069 High-Speed Square Body Fuse, Class aR, 900A, 690V

The Bussmann 170M4069 is an Eaton Bussmann series high-speed square body fuse engineered for demanding semiconductor protection duty, rated 700V (UL) and 690V (IEC) at 900A with a 200 kAIC interrupt rating. Built to Class aR utilization category for accompanied semiconductor protection, this fuse features blade end X blade end terminals sized to DIN 43 620 dimensions and a top-mounted fuse status indicator for fast visual condition checks. CE marked and IEC rated, it delivers dependable high-speed clearing performance for power electronics, drive systems, and other AC circuits where fast semiconductor protection is critical.

Key Features

• Amperage Rating: 900A high-speed fuse purpose-built for semiconductor protection applications.
• Voltage Rating: Dual-rated 700V (UL) / 690V (IEC), AC voltage type, for use across UL and IEC-governed systems.
• Interrupt Rating: 200 kAIC short-circuit interrupting capacity for high-fault-current environments.
• Utilization Category: Class aR (accompanied semiconductor protection) per IEC utilization classification.
• Fuse Construction: Square body fuse shape with slotted, center bolted tags and blade end X blade end terminations built to DIN 43 620.
• Fuse Status Indicator: Top-mounted indicator lets technicians visually confirm fuse condition at a glance.
• Clearing Characteristics: Clearing I2t of 850000 at 660V and Pre-Arc I2t of 155000 for predictable fast-acting protection coordination.
• Compact Footprint: 245 mm length/depth x 142 mm width x 62 mm height at 462 g, suited to space-constrained semiconductor protection enclosures.

Certifications & Compliance

• IEC Rated
• CE Marked

Technical Specifications

• Amperage Rating: 900 A
• Application: semiconductor protection
• Certifications: IEC Rated
• Clearing I2t: 850000 at 660 V
• Clearing Loss: 100
• Compliances: CE Marked
• Fuse Shape: Square body, slotted center bolted tags
• Insulated Metal Gripping Lugs (Imgl): No
• Packaging Type: Standard
• Pre Arc I2t: 155000
• Product Height: 62 mm
• Product Length Depth: 245 mm
• Product Weight: 462 g
• Product Width: 142 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 690 V
• Voltage Type: AC

Typical Applications

• Semiconductor Device Protection
• Power Electronics and Variable Frequency Drive Circuits
• Industrial High-Speed Fuse Protection Systems
• AC Power Distribution Requiring 700V (UL) / 690V (IEC) Protection

Why Bussmann?

Bussmann by Eaton engineers this high-speed square body fuse to IEC utilization Class aR standards with CE marking and IEC rating, giving semiconductor protection circuits fast, coordinated clearing performance at 900A and 200 kAIC. The DIN 43 620 blade end X blade end construction and top fuse status indicator support dependable, code-aware performance for professional power electronics and industrial installations relying on Bussmann semiconductor protection fuses.