The BT139X-600.127 is an ultrafast, low Vce (sat) bi-directional Thyristor manufactured by NXP Semiconductors. It is a dual-channel, 800V power Thyristor, which is capable of dissipating 600A IGBTT and has a maximum Vce(sat) of 0.83V. This high-power, high-performance device is ideal for applications like AC motor drive, UPS, welders, and AC-DC choppers. It can be used in both in- and out-of-complementary configurations and has an operating temperature of -40 to 125°C.