43 V regulation in a DO-35 body
The 1N6015A is a 43 V Zener diode from Microchip Technology in the standard DO-35 axial-lead package, rated for 500 mW continuous power dissipation. The ±10% tolerance on the nominal Zener voltage means the actual breakdown sits between 38.7 V and 47.3 V at the specified test current — a band wide enough to absorb process variation but tight enough for most rail-clamp and reference applications.
Thermal and leakage boundaries
Operating junction temperature spans -65 °C to 175 °C, a military-grade range that suits avionics, downhole instrumentation, and engine-bay sensor supplies where the ambient regularly exceeds 125 °C. Reverse leakage is specified at 100 nA maximum with 27 V applied across the junction — a low enough draw that the diode does not load a high-impedance bias rail when the Zener is not conducting. Forward voltage is 1.1 V maximum at 200 mA forward current, a figure that matters when the diode is used as a steering or protection element in a DC path. The 180 Ohm maximum Zener impedance (Zzt) at the operating point means the regulation slope is moderate — the output voltage shifts about 180 mV per mA of load change through the breakdown region.