Bussmann 170M6419 High-Speed Square Body Fuse

Description

The Bussmann 170M6419 is a high-power, fast-acting fuse designed to provide superior protection for power semiconductors. This square body fuse is engineered for high performance in applications such as motor drives, UPS systems, and power converters. Its aR characteristic ensures it can interrupt short-circuit currents rapidly, safeguarding expensive and sensitive electronic components from damage.

Specifications

• Manufacturer: Bussmann (by Eaton)
• Model: 170M6419
• Rated Current: 1600A
• Rated Voltage: 690V AC (IEC), 700V AC (UL)
• Interrupting Rating: 200kA at 700V AC
• Characteristic: aR (Partial-range semiconductor protection)
• Body Size: 3BN/65
• Mounting: DIN 43653
• Resistance (cold): 0.0388 mOhm at 21 deg C

Label Info

• Type: 170M6419
• Certifications: UL Recognized, CSA, CE, CCC
• Serial/Batch: A030876

Application

This fuse is ideal for protecting high-power inverters, rectifiers, soft starters, solid-state relays, and other power electronic equipment against short-circuit faults.

Country of Origin

This product is made in Denmark.

CO2 Impact

By purchasing this reused component, you are helping to avoid the emission of approximately 7.5 kg of CO2, which would be generated in the production of a new one. This saving is comparable to the emissions from driving a car for 38 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

What does the 'aR' rating on the 170M6419 fuse signify?
The 'aR' class according to IEC standards indicates a partial-range breaking capacity fuse. It is specifically designed for the short-circuit protection of semiconductor devices like diodes, thyristors, and IGBTs. It is extremely fast-acting but is not designed to provide overload protection.

Can this fuse be used in a DC application?
While the primary rating is 700V AC, many high-speed fuses like this one also have a DC voltage rating, which is typically lower than the AC rating. It is crucial to consult the official Eaton/Bussmann datasheet for the 170M6419 to verify its specific DC voltage and interrupting rating capabilities before using it in a DC circuit.

What is the significance of the 0.0388 mOhm value listed on the label?
This value represents the fuse's internal resistance at a temperature of 21 degrees Celsius. This is a critical parameter for calculating power loss (I^2*R) under load. In high-power applications with 1600A, even this very low resistance will generate a significant amount of heat, which must be accounted for in the enclosure design and cooling calculations.

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Last Update: Friday, March 13, 2026