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The SMF110A is a unidirectional transient voltage suppression diode designed for protecting high-voltage DC power lines against lightning-induced surges and switching transients. Rated at 200W peak pulse power (10/1000µs), it features fast response time, low clamping voltage, and stable breakdown characteristics. Housed in a compact SOD-123FL package, the SMF110A is well suited for industrial control systems, communication equipment, power supplies, and automotive electronics requiring reliable overvoltage protection.