The 170M6810 belongs to the Eaton Bussmann 170M series of high speed square body semiconductor fuses, optimized to protect power electronic devices such as diodes, thyristors and IGBTs against short‑circuit faults. It is a DIN 43‑620 size 3 square body fuse with knife blade (DIN blade) terminals on both ends (connection “DIN 43‑620 blade end × DIN 43‑620 blade end”), suitable for mounting in standardized fuse holders or busbar systems. The fuse is rated 690 V AC (IEC) and 700 V AC (UL) with an interrupt rating of 200 kA RMS symmetrical, providing robust protection for high‑fault‑level industrial systems.
This model has a continuous current rating of 630 A and is classified as utilization category aR, meaning it is a partial‑range semiconductor protection fuse that provides short‑circuit protection for power semiconductors but must be combined with other devices for overload protection. Key performance parameters include a pre‑arcing I²t of about 31,000 A²s and a total clearing I²t of about 220,000 A²s at 660 V, along with power losses around 45 W at rated current, parameters important for coordination and thermal design. The body is a square ceramic housing with knife blade contacts, CE‑marked and RoHS‑compliant, and recognized under UL and IEC 60269‑4.
The 170M6810 includes a combination fuse status indicator (dual indicator) which can provide local visual blown‑fuse indication and, when used with appropriate microswitch accessories, remote signaling of fuse operation. Mechanical dimensions are approximately 150 mm length × 71 mm width × 87 mm height, with a weight of about 1.1 kg, matching typical DIN size 3 square‑body fuse dimensions. Typical applications include AC and DC drives, DC common bus systems, power converters/rectifiers and variable speed drives, where fast‑acting aR fuses are required to limit let‑through energy and protect sensitive semiconductor devices.
Key Specifications
