Features: RC absorption circuit module used to protect relay or thyristor, because it can avoid damage caused by the inductive electromotive force generated by the inductive load when turning on or off. Preventing electromagnetic interference and enhancing the anti-interference ability of the microcontroller. For AC or DC inductive load 5 - 400V (less than 1000W), protective relay or thyristor s. RC absorption circuit, absorbs the induced electromotive force that comes from the inductive load. With a varistor, to prevent excessive fluctuation of voltage or current is too large and causing the adhesion of the relay. To ensure the anti-interference ability of the circuit. Adopt terminals that make wiring more convenient. Instructions for use: this module is suitable for circuits containing inductive loads and switching devices such as relays and thyristors. When used, the two module connectors connect to the two relay s or in parallel to the thyristor, to avoid induced EMF damage to the relay or thyristor. RC/Snubber absorption circuit module, other accessories shown in the picture are not included! Specification: Dimensions: 3.1x1.3cm/1.22x0.51inch Quantity: 1 PcPackage Included: 1 x RC/Snubber Absorption Circuit Module (Without Retail Package)