The ESDA12-1K is part of the STMicroelectronics ESDA series of unidirectional and bidirectional transient suppression devices. They provide bidirectional protection in electronic systems such as laptops, personal computers, and other applications where Electrostatic Discharge (ESD) is a concern. The ESDA12-1K has a typical breakdown voltage of 12V and 1500W peak pulse power dissipation and a working voltage range of 1V - 11V. It is a unidirectional device with a 22O minimum dynamic resistance. It is suitable for use across data lines and communication lines in ESD protection scenarios.