Littelfuse QVxx25xHx High-Temperature Alternistor TRIACs are 25A TRIACs that enable easy thermal management and high surge handling capability in AC power control applications. These TRIACs feature 150°C maximum junction temperature (Tj) and 250A ITSM (60Hz half cycle) surge capability, high dv/dt up to 2000V/μs, and 800V voltage capability. The QVxx25xHx TRIACs are available in TO-220AB, TO-220 isolated, and TO-263 packages. These TRIACs are RoHS compliant and are recognized to UL 1557 as electrically isolated semiconductor devices. The QVxx25xHx TRIACs are used in heater control, motor speed control, lighting control, and static switching relay applications.