Feature 1Dual-way SCR input, starting voltage is zero volt and Ioff is zero 2Opto-isolator is between the input circuit and the output circuit 3Isolation withstand voltage is 2500V between input and output 4Pass load-current aging test. Get ec CE certification and international ISO9000 certification 5LED light displays the working status in real timeSpecificationFeatures: Dual-way SCR input, starting voltage is zero volt and Ioff is zero. Opto-isolator is between the input circuit and the output circuit. Isolation withstand voltage is 2500V between input and output. Pass load-current aging test. Get ec CE certification and international ISO9000 certification. LED light displays the working status in real time. 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 m / 500 VDC Ambient Temperature: - 30 to + 75 Installation: Bolted Work Instruction: LED Package List: 1 x Solid State Relay .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }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.