SMA6J9.0A is a unidirectional Transient Voltage Suppressor Diode designed for surge and ESD protection in compact DO-214AC (SMA) surface mount package format. The device features a working peak reverse voltage (VRWM) of 9.0 V, minimum peak pulse power dissipation of 600 W at 1 ms pulse width, and a peak forward surge current (IFSM) of 40 A. It operates across a temperature range of -55°C to +150°C and exhibits typical fast response times of less than 1.0 picosecond from 0 V to breakdown voltage. The SMA6J9.0A is ideal for protecting power buses, I/O interfaces, and sensitive electronics in telecom, computer, industrial, and consumer electronics applications where transient overvoltage protection is critical.