TDK adds mirror-contact feedback to 1,000 V and 1,500 V DC contactors
Image: Image: © TDK Electronics AG.
TDK has introduced two families of gas-filled DC contactors with an optional mechanically linked auxiliary contact for monitoring the state of the main contacts. The HVC28 operates at up to 1,000 V DC and the HVC29 at up to 1,500 V DC; both offer 300 A, 400 A, 500 A and 600 A continuous-current versions.
The normally closed mirror contact is specified against IEC 60947-4-1. Because it follows the main contact mechanically, it provides feedback beyond the electrical command sent to the coil. That lets a control system compare the requested switching state with the state indicated by the auxiliary circuit.
| Rating | HVC28 | HVC29 |
|---|---|---|
| Maximum operating DC voltage | 1,000 V | 1,500 V |
| Continuous-current versions | 300–600 A | 300–600 A |
| Short-circuit withstand, 5 ms | 16 kA | 6 kA |
Those withstand figures describe brief exposure to fault current, rather than the current the contactor can interrupt. For the HVC28, TDK separately specifies one maximum cut-off operation at 1,600 A and 1,000 V under stated resistive-load conditions. It is a single operation, not a repetitive switching rating.
Both families use a ceramic arc chamber and polarity-free main terminals, allowing bidirectional current flow. They have 12 V or 24 V single-coil options and an integrated low-voltage connector.
TDK positions the HVC28 for vehicle battery disconnects and charging equipment, with the HVC29 extending to storage and industrial DC distribution, including proposed 800 V DC data-centre architectures.
Sources
- TDK: HVC28 and HVC29 announcement and rating conditions
- TDK: high-voltage contactor product catalogue
Image: TDK HVC high-voltage contactors, shown in the manufacturer’s press image. Image: © TDK Electronics AG. Image source. Editorial image reuse terms.
