Download the FP125S datasheet PDF.
This datasheet also includes the FP150S variant, as both parts are published together in a single manufacturer document.
12,500 V - 20,000 V Rectifier Stacks
2.2 A Forward Current 3000 ns Recovery Time FP125S FP150S FP175S FP200S ELECTRICAL CHARACTERISTICS AND MAXIMUM RATINGS
Part Number Working Reverse Voltage (Vrwm).