The 7442N part of Philips is a triac based thyristor that is used in many AC switching applications. It is a 6A RMS, 400V gate triggerable thyristor designed for use in a variety of AC driven applications, such as light dimming, motor control, and various application where triggering of the triac is needed. The 7442N is a three-terminal device with a gate, main, and anode terminal. It has a short-term on-state current rating of 6A RMS and a peak off-state voltage rating of 400V. The 7442N is an economical and reliable solution for many AC switching applications.