On Semiconductor

<p>The 1N4742A is a Zener diode designed for voltage regulation applications. It provides a nominal Zener voltage of 12V with a tolerance of ±5%. With a power dissipation rating of 1W, it can handle moderate power levels in through-hole designs.</p><p>&nbsp;</p><p>The diode features a maximum impedance of 9Ω at the Zener voltage and a reverse leakage current of 5µA at 9.1V. It operates over a wide temperature range from -65°C to 200°C, making it suitable for harsh environments.</p><p>&nbsp;</p><p>The device is packaged in a DO-41 (DO-204AL) axial leaded package, designed for through-hole mounting. This package is commonly used for general-purpose Zener diodes and offers reliable thermal performance.</p><p>&nbsp;</p><p>Typical applications include voltage clamping, reference voltage generation, and overvoltage protection in power supplies and other electronic circuits.</p>