3.9V 0.5Watt Zener Diode 395-WZD

The 1N5228B is a 3.9V, 0.5W silicon planar Zener diode manufactured by Central Semiconductor Corp. for reliable low-power voltage regulation and reference clamping. Housed in a hermetically sealed, through-hole DO-35 glass package, this discrete component ensures a standard tight voltage tolerance of 5%. It operates at a nominal Zener breakdown voltage of 3.9V under a 20 mA test current while maintaining a maximum dynamic loop impedance of 23 ohms. Engineered for high performance in compact layouts, this robust device delivers stable electrical operation across a wide industrial temperature range from minus 65 to plus 200 degrees Celsius.