Depletion-mode N-channel MOSFET in a SOT-23-3 package
The Infineon BSS159NH6906XTSA1 is an N-channel depletion-mode MOSFET from the SIPMOS series, built for applications where a normally-on switch is required. Unlike enhancement-mode devices, this part conducts with zero gate-source voltage and turns off when a negative Vgs is applied — a characteristic that suits current-source circuits, normally-on load switches, and linear regulators where fail-safe open is not the default state.
