C295 – Double-pole AC and DC contactors up to 1,600 V

Double-pole NO contactors up to 1,600 V rated insulation voltage and 120 A continuous current. Numerous versions for DC and AC. Frequent switching under load.

C295
Double pole NO contactor for DC and AC. Ui up to 1,600 V, Ith = 120 A. DC versions with blowout magnets and electric arc arcing chamber.

The C295 is a double pole NO contactor for AC and DC applications up to 1,600 V and 120 A of continuous current. The DC designs possess blowout magnets and electric arc arcing chambers. With one auxiliary contact per pole each, the switch state of the main contacts can be reported to the higher-level control system. This is important for safety applications.

The AC and DC contactors of the C295 series can frequently switch loads. Typical switching tasks can be found in vehicles and stationary systems of transport technology, especially in heating circuits, air-conditioning systems in the conversion technology of complex power supply systems. In battery systems, the positive and negative pole can be connected through one pole of the C295 in each case.

Features

Voltages up to 1,600 volts in a compact design

The C295 is a compact contactor from the perspective of the rated insulation voltage of 1,600 volts for the designs C295 K and C295 L. The rated voltage of these designs is 1,200 volts per contact system.

DC version with blowout magnets and arcing chamber

During switch off, an electric arc is ignited between the opening contacts. The current flows on through the ionised air. Permanent magnets drive the ionised air out of the contact zone into the arcing chamber. Here, the electric arc is extended and cooled until it goes out.

The C295 A design disconnects currents of up to 90 A with a voltage of 1,000 V DC (L/R = 1 ms).

Auxiliary contacts with snap-action switches

Two S870 snap-action switches report the switch state of the main contacts to the higher-level control system. This changeover contact with positive opening is suitable for safety applications.

Electrical service life: > 400,000 switching operations

The C295 is designed for switching frequently under load. The electrical service life is more than 400,000 switching operations (Ue = 700 V DC, I = 70 A, L/R = 1 ms, main contacts connected in parallel).

Ambient temperatures: –40°C to +70°C

Based on its approval for rail applications (EN 60077-1, EN 60077-2), the contactor can be used in a wide range of temperatures.

Multi-pole AC or DC applications: 200, 750 or 1,200 V

The two-pole compact contactor C295 is used everywhere two (or more) load circuits have to be switched simultaneously; e.g. the positive and negative poles of battery networks. Due to the three available voltage classes, there is a wide spectrum of fields of application:

  • Main contactor in photovoltaic Systems
  • Main and auxiliary contactor in electric vehicles
  • Heating and air-conditioning systems for railway technology
  • DC drives of machinery

Specifications

C295 A, B, K, L, S, T
Type of voltageDC, AC
Contact configuration2 x NO
Nominal voltage Un200/750/1.200 V
Rated insulation voltage Ui1,000/1,600 V
Rated impulse withstand voltage Uimp8/10 kV
Conv. thermal current Ith120 A
Making capacity, resistive T = 0 ms1,000 A
Breaking capacity1,000 V DC, L/R 1 ms: 90 A; L/R 15 ms: 25 A
Contact material main contactsAgSnO2
Aux. contact2 x snap switch S870, SPDT, optional
Coil voltage Us24, 36, 48, 60, 72, 96, 110, 220 V DC
Coil tolerance Us-30% ... +25%
Coil power consumptionapprox. 27 W / approx. 13.5 W (cold / warm)
IP rating (IEC 60529)IP20, terminals and lower baffle IP00
Mechanical endurance> 3 million operating cycles
Shock5 g (11 ms half sinus)
Vibration1 g (10 ... 100 Hz)
Temperature range-25 °C ... +70 °C
Storage temperature-40 °C ... +80 °C
Weight2,800

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C295 – double pole contactors for DC or AC up to 1,600 volts (Ui