C303 – 1-pole bi-directional DC NO contactors up to 500 amps

The C303 bi-directional DC contactors are compact, high-performance switchgear for applications with high making currents or large capacities. All versions can carry up to 500 amps continuously; in the event of a short circuit, significantly higher currents can flow without the contacts welding together. This means that the contactor retains its full function to disconnect high loads – up to 1.5 MW – regardless of the current direction. This full bi-directionality is important for systems with a charging and discharging process.
Typical applications are DC circuits in inverters for battery storage systems, charging stations in the e-mobility sector or in test benches.

• Up to 25% energy cost savings:
  A long-term low contact resistance and lower contact heating reduce energy losses and require less cooling

• Full bidirectionality:
  Safe disconnection of high power during charging and discharging thanks to specially designed extinguishing chamber; V2G ready

• Safe breaking of high power:
  High breaking capacity under full load up to 1.5 megawatts thanks to innovative
  main contact system

• No risk of explosion:
  Permanent magnetic arc extinguishing without gas encapsulation equalises overheating and overpressure at all times

• High mounting compatibility:
  Compact size specially designed for industrial applications

• High availability:
  Robust design for a long system service life

• High safety level:
  Mirror contact for safe feedback of the switching status according to IEC 60947‑4‑1, annex F

The switching devices are available with 3 coil controls:

• Ecosave:
  With energy-saving PWM module for optimum power consumption when switching and low heating when holding

• High Efficiency Drive (HED):
  With economical drive without PWM module for maximum efficiency

• Precharging contactor:
  For limiting high making currents and to protect main contactors, special variant without economy circuit