PSOT12C Datasheet - ProTek Devices.

FEATURES
✔ ESD Protection > 40 kilovolts
✔ 500 Watts Peak Pulse Power per Line (tp = 8/20µs)
✔ Low Clamping Voltage
✔ Available in Multiple Voltage Types Ranging from 3V to 36V
✔ Unidirectional & Bidirectional Configurations
✔ RoHS Compliant

APPLICATIONS
✔ RS-232, RS-422 & RS-423
✔ Cellular Phones
✔ Control & Monitoring Systems
✔ Portable Electronics
✔ Wireless Bus Protection