BUSSMANN TYPOWER SILCU 170 L 8505

Bussmann TYPOWER SILCU High-Speed Fuse

Description

This is a Bussmann 170 L 8505, a high-speed square body fuse designed for the protection of semiconductors. It provides robust and fast-acting protection for power electronics such as diodes, thyristors, GTOs, and IGBTs used in inverters, motor drives, and rectifiers. Its 400A, 1000V rating makes it suitable for demanding industrial applications requiring reliable overcurrent protection.

Specifications

• Manufacturer: Bussmann (now part of Eaton)
• Part Number: 170 L 8505
• Series: TYPOWER SILCU
• Rated Current: 400 Amperes
• Rated Voltage: 1000 Volts
• Fuse Type: High-Speed / Semiconductor Protection
• Body Style: Square Body
• Mounting: Flush End Mount (2BK/80)

Label Info

• Bussmann Denmark
• 400A 1000V
• TYPOWER SILCU
• 170 L 8505
• 2BK/80

Application

Ideal for use in frequency converters, UPS systems, power supplies, and other high-power electronic equipment to protect against short-circuit currents.

Country of Origin

Made in Denmark.

CO2 Impact

Choosing this surplus component over a new one avoids approximately 32 kg of CO2 emissions, which is equivalent to driving a car for about 160 kilometers.

Availability

This item is in stock and ready for immediate dispatch. It is new old stock (NOS) in its original, opened box. Order now from spareparts2day for expert support and fast delivery.

FAQ

What does “fast-acting” or “high-speed” mean for this fuse?

A high-speed fuse is designed to open extremely quickly under short-circuit conditions. This is critical for protecting sensitive semiconductor devices, which can be damaged by overcurrents in microseconds, far faster than a standard industrial fuse could react.

Can I use this 1000V fuse in a 690V system?

Yes. The voltage rating on a fuse indicates the maximum system voltage it can safely interrupt. Using it in a system with a lower voltage (e.g., 690V or 400V) is perfectly safe and common practice.

What does the ‘2BK/80’ code signify?

This is a Bussmann mounting style code. It specifies a flush end-mount design with a blade terminal, where ’80’ typically refers to the mounting center distance in millimeters, which is 80mm in this case.

Last Update: Friday, March 13, 2026

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