The Mini K HV from TE Connectivity Potter & Brumfield supports the connection and disconnection of the traction battery in switching assemblies for hybrid and battery electric vehicles. As a compact pre-charge relay, the Mini K HV takes over the charging of the filter capacitors over a pre-charge resistor directly before the operation of the main relay, protecting the main relay's contacts from extreme in-rush currents.
With significantly reduced dimensions of 25.5 x 20.7 x 19.3 mm for the PCB version, the Mini K HV represents a major innovation compared to current pre-charge relay solutions. A specially optimized design of the switching contacts enables this miniature relay to switch loads of up to 20 A at a system voltage of up to 450 V. Even under fault conditions, it is able to reliably disconnect the pre-charge circuit from the traction battery. In addition to the standard version with printed circuit board terminals, it is also available as a plugin relay with quick-connect terminals.