High-Temp Sensitive TRIACs From STMicro Achieve Motor Control At 150°C

STMicroelectronics introduced what it describes as the first TRIACs with 10mA gate sensitivity to be specified for operation up to 150°C without derating, enabling low-cost solutions for heaters, motors and other small appliances, through savings in heatsinks, and gate-drive power-supply and snubber circuitry.

The devices introduced are the T410H rated for maximum current of 4A, the 6A T610H, 8A T810H and 10A T1010H. Their low gate current of 10mA allows direct logic-level switching of the TRIAC, which is said to save component count and reduce the size and cost of the power supply. In addition, the low gate current maintains high dynamic performance, maintaining specified minimal commutation and 75V/microsecond noise immunity at up to 150°C. This high maximum junction temperature (Tj) is said to allow designers to reduce or remove heatsinks in cost-sensitive designs, increase power density, and enhance reliability at high ambient temperatures.

The new TRIACs are well suited for control of ac loads such as electric heaters, inductive heating equipment, medium-power motors, and other small appliances. At normal operating temperatures, they are said to exceed the performance of similar devices specified for 125°C maximum Tj. All devices are rated up to 600V, for reliable operation in mains-powered systems.

All devices are available in the industry-standard TO-220AB through-hole package, and the T810H and T1010H will also be introduced in the surface-mount D2PAK package.

The T410H, T610H, T810H and T1010H will be priced from $0.40 in quantities of 10,000 pieces, and are in volume production.