SMAJ18CA is a bidirectional 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 17 V, breakdown voltage range of 18.9 to 20.9 V, and a maximum peak pulse power dissipation of 400 watts at 1 ms pulse width. The device is housed in a compact DO-214AC (SMA) surface mount package with a molded plastic case per UL Class 94V-0, and operates over a temperature range of -55°C to +150°C. It meets IEC 61000-4-2 ESD (Level 4), IEC 61000-4-4 EFT, and IEC 61000-4-5 Surge standards, making it ideal for protecting sensitive circuits from transient overvoltage events in consumer and industrial applications.