The P4SMAJ33CA_R1_00001 is a Transient Voltage Suppressor (TVS) diode manufactured by Panjit. It comes in an SMA (DO-214AC) package and is RoHS-compliant. It has an S1P3, 5-pin plating, with nominal breakdown voltages of 53.3V (VBR), 36.7V (VRWM), and 33V (VZ). The small size of the package enables it to be mounted in tight space layouts. This diode is primarily used to protect sensitive low voltage circuits from voltage surges and spikes, such as lighting and power-up sequences.