Specifications: The bottom plate of the relay is made of pure aluminum material of good cooling effect. Features high-quality contact, it has excellent electrical conductivity. Using high-quality plastic, the durable shell is resistant to high temperature and flame-retardant. The integrally sealed housing can well protect the internal regulator. It is suitable for research equipment, communication equipment, factory equipment, power equipment, etc. Item Name: Solid State Relay Material: Aluminum, Plastic Model: BERM-SK40DA Rated Current: 40A Rated Voltage: 220V AC Contact Form: Voltage Regulator Input Voltage: 3-32V AC Control Voltage: 24-480V AC Contact Switch Voltage: Potentiometer Control Contact Switch Current: Linear Control Features: Durable, Safe, Easy to Use, Heat-resistent Size: 5.9cm x 4.8cm x 3.4cm/2.32" x 1.89" x 1.34" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Solid State Relay