Feature: 1. AC TO AC: With this solid state relay, you control 24 to 480VAC circuit through 90 to 250VAC console voltage, which is applicable to most temperature controllers and switch consoles. 2. ENSURE SAFETY: Solid state relay avoids introducing a large number of high voltage circuits to the console, which can remotely operate the start of fans, pumps, etc. 3. HIGH PERFORMANCE: With the characteristics of no sparking, no noise, fast switching speed, anti corrosion, moisture and vibration, high reliability, good electromagnetic compatibility, etc. 4. WIDELY USE: Solid state relay is very suitable for automatic process control applications and is an essential component of temperature controller and other mechanical control systems. 5. CONTACTLESS SWITCH: A better contactless switch composed of shell, electronic circuit board, heat dissipation base plate, silicon controlled rectifier and photoelectricity, has a wide range of use. Specification: Item Type: 3 Phase Solid State Relay Material: High Pressure Phenolic Plastic, Brass Control Voltage: 90-250VAC Load Voltage: 24-480VAC Control Current: ≥10MA Dielectric Withstand Voltage: 2000VAC On State Voltage Drop: ≤1.5V Open State Leakage Current: ≤5MA Conduction Time: ≤10MS Ambient Temperature: -30℃ to +70℃. Package List: 1 x 3 Phase Solid State Relay1 x Dustproof Cover Note: Precautions for selection of solid state relay products:1. When selecting products, different residuals should be reserved on current grades according to the properties of the load. (For resistive load, it can be selected according to 2 or 3 times of load current. For inductive or capacitive load, it can be selected according to 3 to 5 times of load current, and for motor more than 5 times.)2. According to the relationship between load current and ambient temperature, when the ambient temperature is high or the heat dissipation condition is poor. The current capacity should be increased. In order to prevent load short circuit during use, it is required to connect the corresponding quick disconnect switch or quick fuse in series in the load circuit.3. In case of inductive load, the voltage sensitive resistor shall be connected at the output end in parallel to prevent the thyristor from being damaged in case of overvoltage. Selection of varistor (MOV): 430 to 470V at 240V, 680 to 750V at 440V.4. During installation, it is required that the contact surface between the heat sink and the product must be flat and smoothly, and the surface should be evenly coated with a layer of thermal conductive silicone grease. Finally, the screws with flat washers and spring washers should be symmetrically tightened and fixed.5. When the solid state relay works and stops for the first time, it should take advantage of its remaining temperature to tighten the fixing screws again, so that the solid state relay base plate and the heat sink surface can be in close contact, and achieve the ideal heat dissipation effect.6. The nominal current of different models of solid state relays is the nominal current when the ambient temperature is 40℃, so the heat dissipation should be sufficient!7. Don't use a multimeter at the load end to judge the quality of the product!