Specifications:This relay is reliable, the compact size design provides users with the largest convenience.It reduces the electromagnetic interference.Made of high-quality materials, it has stable working performanceThis solid state relay is ideal for various household, industrial automation process control applications, such as heating and cooling control, CNC machinery, remote control systems, etc. Item Name: Solid State RelayMaterial: Aluminum, ABSModel: BRM-40DAInput Voltage: 3 - 32V DCLoad Voltage: 24 - 480V ACCurrent: 40AFeatures: Durable, Safe, Easy to UseSize: 5.9cm x 4.55cm x 2.95cm/2.32" x 1.79" x 1.16" (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.The solid-state relay generates a lot of heat, when the load current is higher than 10A, a radiator must be used, and thermal grease must be applied between the bottom plate of the solid-state relay and the radiator. (you should use fan for active heat dissipation when the load current is higher than 60A) Package Includes:1 x Solid State Relay