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YAZ2D56 is a high reliability silicon planar zener diode rated at 56V with 2W continuous power dissipation capability. It features low dynamic impedance to maintain tight voltage control under varying load currents, excellent thermal stability for sustained high temperature operation, and fast transient clamping behavior for repetitive surge events. The device is widely applied in industrial SMPS feedback reference networks, regulated DC rails, secondary side voltage stabilization circuits, and overvoltage protection systems in power converters and control electronics.