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The P4SMF85A is a unidirectional transient voltage suppression diode engineered for reliable surge protection in high-voltage DC systems. Rated at 400W peak pulse power with a 10/1000µs waveform, it provides fast response and stable clamping against lightning surges, switching transients, and induced overvoltage events. The compact SOD-123FL package supports space-efficient PCB design in industrial power supplies, communication equipment, and control systems.
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