Switching Thyristor Sxx20x/Sxx25x Series

Part Number Information
Part #: Price/Availability:
S4020L Buy Now
S4025L Buy Now
S4025N Buy Now
S4025R Buy Now
S6020L Buy Now
S6025L Buy Now
S6025N Buy Now
S6025R Buy Now
S8020L Buy Now
S8025L Buy Now
S8025N Buy Now
S8025R Buy Now
SK020L Buy Now
SK025L Buy Now
SK025N Buy Now
SK025R Buy Now

Switching Thyristors are solid state switches that are normally open circuits (very high impedance), capable of withstanding rated blocking/off-state voltage until triggered to on state. Used for circuit control applications, Littelfuse offers TRIAC, QUADRAC, SCRs, Rectifiers plus Alternistor Triacs for best commutating and noise immunity. Offered in various and other configurations for a wide range of currents blocking/off-state voltages, packages, and triggering. Excellent unidirectional switches for phase control applications such as heating and motor speed controls. Standard phase control SCRs are triggered with few milliamperes of current at less than 1.5V potential.


• RoHS compliant
• Glass — passivated junctions
• Voltage capability up to 1000 V
• Surge capability up to 350 A


• Typical applications are AC solid-state switches, industrial power tools, exercise equipment, white goods and commercial appliances.
• Internally constructed isolated packages are offered for ease of heat sinking with highest isolation voltage