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Y1ZD75 is a high reliability planar silicon zener diode rated at 75V with continuous 500mW power dissipation capability. It features controlled dynamic impedance to maintain predictable voltage clamping under load variations, good thermal performance for compact PCB layouts, and fast transient response verified by pulsed breakdown testing. The device is widely used in compact SMPS outputs, industrial control boards, signal line overvoltage limiting, and high-voltage reference networks where space and stability are critical.