C303 – 1-pole bi-directional DC NO contactors up to 350 amps

Small dimensions – great performance! Nevertheless, all the air gaps in the contact area have been generously dimensioned. The rated insulation voltage is 1,500 volts.
The arc chamber of the C303 is made of plastic. This is efficient and saves weight.

All versions of the C303 can permanently carry up to 350 amps – provided a sufficiently dimensioned connection cross-section of 150 mm². The maximum ambient temperature for industrial applications is 80 °C. These excellent values are achieved through very high contact forces.

All versions of the C303 can reliably separate high currents and voltages when required, regardless of the direction of the current. These properties are achieved by the special arrangement of blowout magnets and arc chamber, burn-off resistant silver contacts, high contact forces and generously dimensioned air gaps in the contact area.

The C303 contactors have an auxiliary contact with mirror contact function according to IEC 60947-4-1, annex F. Mirror contacts are required in feedback circuits of safety controls. The mirror contact function informs about the switching state and ensures that the NC contact of the auxiliary contact is not closed at the same time as the NO main contact.

With standard coil and economy circuit for efficient electronic coil control and optimum power consumption when making and holding.
Connection via industrial plug.

With optimized coil size to ensure maximum efficiency even without the use of an economy circuit.

With standard coil without economy circuit as precharging contactor for limiting high making currents of the main contactors.