The MST23A052UA is an ESD Protection Device manufactured by Me-Tech and is housed in SOT-23-3 (surface-mount) packaging. It is RoHS-compliant and has been designed to protect sensitive electronic components from ESD (electrostatic discharge) damage. The device has a wide operating voltage range of 4V to 18V, a low breakdown voltage of 5.2V, a maximum clamping voltage of 16V, and an adjustable current limit of up to 40mA. The device is well-suited for protecting a variety of components, including gates, DRAMs, LEDs, FPGAs, ASICs, and linear components.