SMAJ220A is a unidirectional transient voltage suppressor diode designed for surge and ESD protection in portable communications, computing, and video equipment. It features a working peak reverse voltage of 220V with a breakdown voltage range of 244V to 270V, housed in a compact DO-214AC (SMA) surface mount package. The device delivers 400 watts peak pulse power dissipation at 1 ms pulse width and maintains steady-state power dissipation of 1.0 watt at 75°C lead temperature. With fast response times of less than 1.0 picosecond and operating temperature range from -55°C to +150°C, the SMAJ220A provides reliable protection against IEC 61000-4-2 ESD, IEC 61000-4-4 EFT, and IEC 61000-4-5 surge events. Its RoHS-compliant construction and UL recognition make it suitable for demanding industrial and consumer applications requiring compact, high-performance transient protection.