Solid state relays are semiconductor devices and generally generate a lot of heat during operation. When the load current is higher than 10A, a radiator must be used, and thermally conductive silicone grease must be applied between the bottom plate of the solid state relay and the radiator (above 60A) (Forced cooling by fan). Features - Color: Assorted color. - Material: Plastic, metal. - Size: 5.70X4.50X3.00cm/2.24X1.77X1.18 inch. - Output current: 40A. - Control voltage: 3-32VDC. - On-state buck: 1.6V. - Control current: 5-20mA. - Load voltage: 20-480VAC. - On-off time: 10mS. - Good optocoupler operation is more stable, excellent power cycle and temperature characteristics. - Built-in smart chip, higher control frequency and higher precision. - Can withstand frequent frequency control and precise control of current. - Thicken electroplated aluminum plate, welding of thyristor devices, faster heat dissipation. - Semiconductor original output, no mechanical action, no noise, no sparks.