High-temperature silicon-controlled rectifier (SCR) thyristors
Littelfuse, Inc. has introduced a series of 40A standard high-temperature silicon-controlled rectifier (SCR) thyristors that are ideal for use as switches for rectifier and phase control applications such as voltage regulator, heating and motor speed controls. The new SJxx40x Series is the first SCR thyristor from Littelfuse capable of handling 600V, 40Arms and junction temperatures up to 150°C.
The SJxx40x Series is designed to prevent the overheating and thermal runaway problems SCRs can experience due to an application’s limited cooling capability or occasional overload situation. They are designed to trigger with just a few milli-amps of current at less than 1.5V potential.
Typical applications for SJxx40x Series SCR Thyristors are rectifiers in a variety of end uses including AC solid-state switches, industrial power tools, exercise equipment, white goods and commercial appliances.
The SJxx40x Series is capable of handling high load current and occasional overloads under limited cooling conditions due to high junction temperature (TJ) of 150°C. It is available in both TO-220AB and TO-263 packages to support flexible mounting options for easier device design. In addition, the high rate of voltage change over time (dv/dt) enables the SJxx40X to tolerate more line noise and surge often found in commercial AC lines.