CON Contactors

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  • Allows a thermostat or other switching device to switch loads greater than its normal capacity
  • Can be used for either single phase or three phase loads
  • Optional enclosure available

Range & Prices

The prices shown are list prices and perfectly safe to use for budget purposes. Contact your electrical wholesaler for final prices.

Model Poles Amps per Pole Max kW per Pole @230V List Price
CON-32 3 32 7 £34.00
CON-50 3 50 11.5 £45.00
CON-80 3 80 18 £86.00
ENCL-D Enclosure for CON-32 and CON-50 £18.00

Selection

A contactor will allow a switching device such as a thermostat, timer or movement sensor to control a heater with a load greater than the device’s switching capacity.  As all the contactors in the BN Thermic range are ‘three-pole’ they will also enable a single pole device to switch a three phase load.

Using the following table, it is easy to select the contactor capable of switch any given load.

Model Poles Amps per Pole Max kW per Pole @230V
CON-32 3 32 7
CON-50 3 50 11.5
CON-80 3 80 18
ENCL-D Enclosure for CON-32 and CON-50

CAUTION

When selecting a contactor to switch halogen heaters, the contactor should be over-rated by 100%

When working with voltages other than 230V 1ph or 400V 3ph & N, please consult BN Thermic

Examples

Using a 10A thermostat to switch a 4kW 230V 1ph underfloor heating mat

The 4kW mat will draw a nominal 17A.  As the mat is operating on a single phase, the load will be switched using a single pole. Therefore we can select the CON-32 which is capable of switching up to 32 A per pole.

Using a 10A thermostat to switch a 30kW 4000V 3ph & N heating system.

The 30kW heating system will draw a nominal 44A per phase.  As the system is operating on all three phases, the load will be switched using all three poles.  We would therefore select the CON-50 which is capable of switching up to 50A per phase.

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