1N6012C Zener Diode, 33 V, 500 mW, DO-35, Microchip

The 1N6012C is a 33 V Zener diode in the standard DO-35 axial-lead package, rated for 500 mW continuous power dissipation. The ±2% tolerance on the nominal voltage means the regulation knee sits between 32.34 V and 33.66 V — tight enough for a reference rail or a clamp threshold where a 5% part would drift outside the guard band. The operating temperature range of -65°C to 175°C covers military, aerospace, and downhole environments where the ambient near the board exceeds the standard 125°C industrial limit. The 88 Ohm maximum Zzt impedance at the test current means the dynamic resistance is low enough that the voltage shift from 1 mA to 10 mA is under a volt — acceptable for a shunt regulator feeding a low-current load.