12 V Zener, 1 W — what the ratings mean for the BOM
The HZ12BP-E is a 12 V Zener diode from the HZ-P series, rated for 1 W continuous power dissipation in a DO-41 axial-lead package. The 12 V nominal voltage with ±5% tolerance covers the typical regulation window for 12 V rails and clamp circuits. The 8 Ohms maximum Zzt impedance means the diode holds regulation reasonably tight under moderate current changes — expect a few tens of millivolts of shift across the operating current range. Reverse leakage is specified at 10 µA maximum at 9 V reverse bias, which is low enough for most bias and protection uses but worth checking if the circuit holds the diode near its reverse breakdown threshold continuously.
Package and mounting — DO-41 axial, through-hole
The DO-41 axial package is the standard for 1 W Zener diodes. The through-hole mounting suits point-to-point wiring, terminal strips, or PCB.
Lifecycle — active, no phase-out signal
The HZ12BP-E carries an active product status.