STW23N85K5 N-channel 850 V, 0.2 Ω typ., 19 A MDm.
STMicroelectronics
STW23N85K5 - N-channel Power MOSFET
STW23N85K5 N-channel 850 V, 0.2 Ω typ., 19 A MDmesh™ K5 Power MOSFET in a TO-247 package Datasheet - production data 3 2 1 TO-247 Figure 1: Internal.