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Bussmann 170M6559 Class aR High-Speed Fuse, 550A
The Bussmann 170M6559 is a Class aR high-speed fuse rated 550A RMS, engineered for semiconductor and power electronics protection where fast clearing is critical. Built in a square body design with a flush mounting profile, this fuse carries a voltage rating of 700 Vac (UL) / 690 Vac (IEC) and an interrupt rating of 200 kAIC, making it suitable for DC common bus systems, DC drives, and power converters/rectifiers. The fuse is IEC Rated and UL Recognized, with CE marking and RoHS compliance noted on the product record.
Key Features
- Amperage Rating: 550A RMS current rating sized for DC common bus, DC drives, and power converter/rectifier circuits.
- Class aR Construction: High-speed Class aR fuse element designed for rapid clearing ahead of semiconductor-damaging fault currents.
- Voltage Rating: 700 Vac (UL), 690 Vac (IEC) for dual-standard system compatibility.
- Interrupt Rating: 200 kAIC for reliable operation under high fault-current conditions.
- Fuse Indicator: Non-Indicating design in a square body -GKN/- type K indicator-for-micro configuration.
- I2t Performance: Pre-Arc I2t of 19,500 and Clearing I2t of 135,000 at 660V for predictable coordination with upstream/downstream devices.
- Watt Losses: 100W rated power loss under normal operating current.
- Mounting & Dimensions: Flush mounting, square body measuring 5.433 IN length x 2.087 IN height x .315 IN width, weighing 1.6456 LB.
Certifications & Compliance
- IEC Rated
- UL Recognized
- CE Marked
- RoHS Compliant
Technical Specifications
- Amperage Rating: 550A
- Application: DC common bus, DC drives, power converters/rectifiers
- Class: Class aR
- Clearing I2t: Clearing at 660V: 135000
- Current Rating: 550A RMS
- Fuse Indicator: Non Indicating
- Interrupt Rating: 200 kAIC
- Packaging Type: Standard
- Pre Arc I2t: 19500
- Voltage Rating: 700 Vac (UL), 690 Vac (IEC)
- Watt Losses: 100W
- Product Type: Square body -GKN/- type K indicator for micro
- Product Length: 5.433 IN
- Product Details: Square body -GKN/- type K indicator for micro
- Mounting Method: Flush
- Product Height: 2.087 IN
- Product Weight: 1.6456 LB
- Product Width: .315 IN
Typical Applications
- DC Common Bus Systems
- DC Drives
- Power Converters and Rectifiers
- Industrial Power Electronics and Motor Control
- Semiconductor Overcurrent Protection
Why Bussmann?
Bussmann builds the 170M6559 to Class aR high-speed performance standards, combining a 200 kAIC interrupt rating with IEC Rated and UL Recognized status for dependable protection in demanding DC power conversion environments. The square body, flush-mount construction and documented I2t characteristics support consistent, code-compliant coordination in professional electrical and industrial power systems.
Manufacturer Resources
Product Specs
- Amperage Rating:
- 550A
- Application:
- DC common bus, DC drives, power converters/rectifiers
- Class:
- Class aR
- Clearing I2t:
- Clearing at 660V: 135000
- Current Rating:
- 550A RMS
- Fuse Indicator:
- Non Indicating
- Interrupt Rating:
- 200 kAIC
- Packaging Type:
- Standard
- Pre Arc I2t:
- 19500
- Voltage Rating:
- 700 Vac (UL), 690 Vac (IEC)
- Watt Losses:
- 100W
- Product Group:
- Fuses
- Department:
- Electrical
- Product Subgroup:
- Other Fuses
- Product Type:
- Fuse
- Product Length:
- 5.433 IN
- Product Details:
- Square body -GKN/- type K indicator for micro
- Mounting Method:
- Flush
- Product Height:
- 2.087 IN
- Product Weight:
- 1.6456 LB
- Product Width:
- .315 IN