30 V Zener, 500 mW — voltage reference or clamp
The 1N6011A is a 30 V Zener diode rated for 500 mW continuous power dissipation in a DO-35 axial package. Maximum impedance (Zzt) is 95 Ohms, which sets the dynamic resistance at the Zener knee. For a load drawing 5 mA, the regulation error from impedance is under 0.5 V; at higher currents the error scales linearly and may push the output outside the tolerance band.
Temperature range and leakage
Operating junction temperature spans -65°C to 175°C — a military-grade range that covers avionics, downhole, and engine-bay environments without derating the power dissipation below 500 mW at the hot end. Reverse leakage is 100 nA maximum at 18 V reverse bias — low enough to avoid loading a high-impedance node in a precision reference or sample-and-hold circuit. The forward drop is 1.1 V at 200 mA, typical for a silicon Zener; useful if the diode is also used as a low-current rectifier or protection clamp.