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YAZ1D15 is a high reliability silicon planar zener diode rated at 15V with 1W continuous power dissipation capability. It features low dynamic impedance to maintain tight voltage regulation under varying load currents, excellent thermal stability for continuous operation, and fast transient clamping behavior for overvoltage events. The device is widely applied in regulated DC rails, SMPS feedback reference networks, microcontroller protection circuits, and secondary side voltage stabilization in compact power electronics.