BETASS34Surface-mount Schottky rectifier
A compact forward path for low-voltage power.
SS34 is a surface-mount Schottky rectifier. This page follows the Vishay SS34-E3 in SMC (DO-214AB): its band marks the cathode, and S4 identifies the device. Other manufacturers may use a different package for the same short name; always match the full ordering reference. The metal–semiconductor barrier allows a low forward drop. Current capability still depends on cooling, while reverse leakage increases with heat. The package’s broad plated contacts carry current and conduct heat into the PCB. The illustrated 5 V, 100 Ω bench circuit demonstrates series polarity protection. Assuming a 0.4 V drop gives 4.6 V and 46 mA at the load. These are teaching calculations, not guaranteed measurements or a demonstration of the full current rating.
