The P4SMAJ33A_R1_00001 is an electronic part manufactured by Panjit. It is a Transient Voltage Suppressor (TVS) with a Surface Mounted Assembly (SMA) or DO-214AC package. It is RoHS compliant and has a voltage rating of 53.3V 36.7V 33V between its two pins. This device is used to protect against voltage transients, spikes, or surges that can occur from lighting, power frequency disturbances, and electrostatic discharges.