12 V rail clamping and regulation
The BZV90-C12115: 12 V Zener diode in SOT-223 surface-mount package, rated for 1.5 W continuous power dissipation. The ±5% tolerance on the nominal Zener voltage gives a regulation window tight enough for most auxiliary supply rails and overvoltage clamp circuits.
Leakage and forward drop
Reverse leakage is specified at 100 nA maximum at 8 V reverse voltage, which keeps standby losses negligible in battery-powered designs. Forward voltage is 1 V maximum at 50 mA forward current — useful if the diode is pressed into service as a general-purpose rectifier in a pinch.
