Bussmann 170M4690 High-Speed Fuse-Link, 250A, 1250V AC, Class aR

Bussmann 170M4690 High-Speed Fuse-Link, 250A, 1250V AC, Class aR

The Bussmann 170M4690 is a high-speed fuse-link rated 250 A at AC 1250 V, built in the Size 1 form factor with overall dimensions of 53 x 69 x 160 mm. Classified aR (accompanied semiconductor protection), this fuse-link is engineered for high-speed interruption in circuits where solid-state devices such as SCRs and diodes need dedicated overcurrent protection. It carries an interrupt rating of 100 kAIC and is manufactured to IEC standards with UL recognition, giving specifiers a fuse-link suitable for both international and North American semiconductor protection schemes.

Key Features

• Size 1 Form Factor: Compact 53 x 69 x 160 mm body sized for standard Size 1 fuse mounting and clip/base hardware.
• 250A Rating: Delivers 250 A continuous current handling for semiconductor branch circuits.
• AC 1250V Rating: Rated for AC 1250 V systems, suited to demanding power electronics applications.
• Class aR Utilization Category: Accompanied semiconductor protection, providing high-speed clearing to safeguard SCRs, diodes, and other solid-state components from short-circuit currents.
• High Interrupt Rating: Rated 100 kAIC for reliable performance under high fault-current conditions.
• Square Body Construction: Square body with center bolted tags for secure, low-resistance terminal connections.
• No Fuse Indicator: Supplied without a blown-fuse indicator (Fuse Indicator: None).

Certifications & Compliance

• IEC Certified
• UL Recognized
• CE Compliant

Technical Specifications

• Certifications: IEC
• Class: Class aR
• Compliances: CE
• Fuse Indicator: None
• Fuse Shape: Square body, center bolted tags
• Interrupt Rating: 100 kAIC
• Packaging Type: Standard
• Product Height: 54 mm
• Product Length Depth: 58 mm
• Product Weight: 659 g
• Product Width: 170 mm
• Utilization Category: aR (accompanied semiconductor protection)

Typical Applications

• Semiconductor Protection Circuits (SCRs, Diodes, Power Modules)
• Variable Frequency Drives and Motor Control Power Electronics
• Industrial Power Distribution and Switchgear
• High-Speed Short-Circuit Protection for Solid-State Equipment
• Panelboard and Control Panel Fuse Blocks Requiring Size 1 Fuse-Links

Why Bussmann?

Bussmann fuse-links are built to deliver dependable, code-compliant overcurrent protection for demanding electrical and power electronics environments. The 170M4690's Class aR utilization category, 100 kAIC interrupt rating, and IEC/UL recognition reflect the rigorous construction professionals rely on when protecting sensitive semiconductor equipment from fault currents. Choose Bussmann for high-speed fuse-link performance backed by internationally recognized standards.