Solid State Relay Heating Radiator 125*135*250mm be used for solid state relay 400A | Relays

Solid State Relay Heating Radiator 110X125X135MM be used  for Three phase solid state relay 10A 25A 40A 60A 80A 100A 120A 150A

What type of radiator does solid state relay or modules should be equipped with? Actually, there is no fully consistent relationship between them, because the heating power of solid relay or modules mostly related to the actual load current of the driven, but not the rating. Design formula of Heating:
1. Heating=actual load current(A)× 1.5W/A The formula applicable for single solid state relay, single AC booster modules and Rseries of solid state relay. But for three-phase solid state relay and three-phase AC booster modules, the actual load current is the blanket of three-phase actual load current.
2. Heating =actual load current(A)× 3.0W/A
The formula applicable for single fully controlled modules.
The fuction of radiator is to emanate the heat produced by solid state relay or modules, but in fact, it is difficult to choose a radiator size. Because the effect of radiator effect for reference: The temperature of motherboard must below 80º C. So in practical application, a 75º Ctemperature switch(with normally closed contact)can be installed in the mounting surface which near to the edge(20mm)of solid state relay or modules.
When choose a radiator, besides these factors, it should also think about the size of solid state relay whether can it suit for the radiator or not. And radiator install space in the machine must be considered too. Finally must ensure the temperature of motherborad of solid state relay or modules of below 80º Cin the worst condition.

relay heatsink