TDK Corporation has introduced the HVC28 and HVC29 series of gas-filled, high-voltage direct current (dc) contactors for electric vehicles (EVs), dc fast-charging infrastructure, and other high-power applications. Both series are available with continuous current ratings of 300, 400, 500, and 600 amperes (A), with an optional mechanical auxiliary contact for switching-state monitoring.
The HVC28 is designed primarily for automotive applications operating at dc voltages up to 1,000 volts (V), including battery disconnect units, high-voltage junction boxes, and traction battery systems in passenger and commercial EVs. The HVC29 is designed for industrial power systems operating at up to 1,500 V, including dc fast-charging stations.
The HVC28 offers continuous current capability up to 600 A and can withstand short-circuit currents of 16 kiloamperes (kA) for 5 milliseconds (ms). Under specified resistive-load test conditions, the contactor can perform one maximum current interruption at 1,600 A and 1,000 V.
The HVC29 also provides continuous current ratings up to 600 A, with short-circuit current handling capability of 6 kA for 5 ms. Its higher voltage rating makes it suitable for dc fast-charging infrastructure and other high-voltage power systems.
Both contactor series use a ceramic, gas-filled arc chamber to interrupt DC currents. Their polarity-free main terminals allow bidirectional current flow, making them suitable for applications where electrical power may flow in either direction. An integrated connector simplifies low-voltage connections and installation.
For additional switching-state monitoring, an optional normally closed mirror contact provides mechanically linked feedback on the position of the main contact. The auxiliary contact complies with IEC 60947-4-1 and can be used to verify whether the main contact has opened or closed, supporting safety-related monitoring in EV electrical systems and charging equipment.
Both series are available with 12 or 24-V single-coil configurations, each consuming six watts (W) at nominal voltage. The contactors measure 95.5 × 96 × 49 millimeters (mm), with the HVC28 weighing approximately 640 grams (g) and the HVC29 weighing approximately 630 g.
The devices operate across a temperature range of −40° to +85° C. Both series are CE and UKCA-compliant, certified to UL 60947-4-1, and compatible with Restriction of Hazardous Substances (RoHS) requirements. China Compulsory Certification (CCC) is pending.
Filed Under: Charging, Power Electronics, Technology News