SCR thyristor ideal for controls ion power tools, brown goods and white goods

Littelfuse has introduced a series of high-temperature SCR thyristors, the first circuit protection devices of their kind to offer a junction temperature of 150C in compact surface-mount D-PAK (TO-252) packaging. These devices are also available in through-hole V-PAK (TO-251) packages. The standard SJ Series have a low gate current trigger level of 6mA or 15mA maximum at approximately 1.5V. Sensitive models in the series feature a gate trigger current of less than 200µA. These sensitive gate devices can be easily triggered by sense coils, proximity switches, and microprocessors. Applications for thyristors include CDI systems for motorcycle engines, portable generator engine ignition, strobe lights and nailers, as well as generic rectifiers, battery voltage regulators, converters and inrush current limiting circuits in AC/DC converters. They are also ideal for use in controls for power tools, home/brown goods (such as consumer electronics like televisions, radios, digital media players, and computers) and white goods/appliances. “Despite the SJ Series’ compact D-PAK and V-PAK footprints, its high junction temperature of 150C allows for performance comparable to that of SCR thyristors in larger TO-220AB and TO-263 packages because it has a wider operating margin,” said Koichiro Yoshimoto, business development manager, Semiconductor Business Unit, at Littelfuse. “The combination of a higher junction temperature and excellent surge handling capability will allow designers to replace existing SCR thyristors in larger TO-220AB and TO-263 packages, and allow others to design smaller products.”