The P4SMAJ26A_R1_00001 is a RoHS (Restriction of Hazardous Substances Directive) compliant transient voltage suppressor (TVS) manufactured by Panjit. It is a SMA (DO-214AC) surface-mount device with a breakdown voltage of 42.1V and a clamping voltage of 28.9V and 26V. It is designed to protect electronic components from voltage spikes or ESD (electrostatic discharge) events.