The SMAJ300CA with 486V 335V 300V Bi-Directional SMA TVS ROHS is a transient voltage suppressor diode manufactured by MSKSEMI. This part is designed to protect electronic equipment against spikes or surges in voltage. It is a low capacitance surge suppressor, meaning it will not interfere with normal data signals. The SMAJ300CA has a maximum working voltage of 486V, a peak pulse power of 550W, a clamping voltage of 335V, and an operating temperature range from -55C to 125C. It is RoHS compliant and is suitable for various applications such as AC/DC adapters, battery chargers, desktop computers, printers, power supplies, and more.