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YAZ1P5D12 is a high reliability planar silicon zener diode rated at 12V with 1.5W continuous power dissipation capability. It provides low dynamic impedance to maintain tight voltage regulation under load fluctuations, excellent thermal stability enabled by the SMA package for sustained operation, and rapid transient clamping to protect sensitive circuits from overvoltage events. Typical uses include regulated DC rails, SMPS feedback/reference networks, control IC supply protection, and voltage limiting in industrial and consumer power electronics.