The SMAJ170CA-TR, manufactured by STMicroelectronics, is a TVS diode device used as an overvoltage protection component. It has a working voltage of 170V and a 400W power dissipation rating. It is unidirectional, meaning it channels electricity through one direction only. It comes in a standard SMA package and is design to suppress and dissipate ESD and EFT transient voltage threats. It has a high surge peak power rating of 400 Watts and a low capacitance of 0.2pF. Its Low on-state voltage, fast response time, and very low clamping voltage are what makes it efficient and reliable. This product is designed for general purpose applications, such as appliance, consumer electronics, automotive, audio, power entry modules, and telecommunications.