The P6KE200A is a Transient Voltage Suppressor (TVS) diode with a 274V, 190V, and 171V breakdown voltage, DO-15 (DO-204AC) package, and ROHS compliant manufacture by Yageo. It is designed to protect circuits and components from overvoltage transients caused by lightning, inductive loads, and static electricity. It features low clamping voltage, low dynamic resistance, and fast response time. This device is commonly used in computer peripherals, instrumentation, power supplies, and various commercial, medical, and automotive applications.