30V 0.5Watt Zener Diode 30V-ZD

The 1N5256B is a 30V, 0.5W silicon planar Zener diode manufactured by STMicroelectronics for reliable low-power voltage regulation and reference circuits. Housed in a compact, hermetically sealed DO-35 glass package, this discrete device provides a standard tight voltage tolerance of 5%. It operates at a nominal Zener breakdown voltage of 30V under a light 4.2 mA test current while presenting a maximum dynamic loop impedance of 49 ohms. Engineered for high thermal stability, this device maintains precise electrical performance across an industrial operating temperature range from minus 65 to plus 175 degrees Celsius.