Features Model: SSR-40AA, single phase Solid State Relay 40A AC to AC control, CE Compliant to EDual-way SCR input, starting voltage is zero volt and Ioff is zero High Insulation Resistance: Opto-isolator is between the input circuit and the output circuit,Insulation Resistance: 500 mΩ / 500 VDC Encapsulation Protection Structure: Isolation withstand voltage is 2500V between input and output, output snubber circuit protection No EMI/EFI & Low surge by Zero Cross Trigger method, specially suited to control sensitive, capacitive and Non-saturated inductive loads SSR switches use semiconductor component acts as a switch for the relay, no moving parts inside, no mechanical wear, no action noise, no mechanical failure, and high reliability Specification:  Material: Plastic+Metal Color: Shown As Pictures Weight: 124g Type: Solid State Relays Trigger Current: 40 Contact Switching Voltage: 480 Reverse Repeat Peak Voltage: 480 Off Speed: Normal Heat Dissipation Function: no heat sink Power Characteristics: medium power Rated Forward Average Current: 40 Frequency Characteristic: intermediate frequency Maximum Stable Working Current: 40 Poles: 3 poles Application: solid state Pick-Up Current: 40 Control Mode: AC-AC Load Current: 40A Load Voltage: 24-480V AC Control Voltage: 90-250V AC Control Current: AC:12mA On State Leakage Current: less than 2mA General Antihypertensive: no more than 1.5V AC Breaking Time: less than or equal to 10mS Pressure Resistance: 2500V AC Insulation Resistance: 500 mΩ / 500 VDC Ambient Temperature: - 30 ℃ to + 75 ℃ Installation: Bolted Work Instruction: LED Package List: 1 x Solid State Relay Note:It can only be used within 30% of 40a (12A) and a radiator should be added at the bottom.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List