QJ8040KH7TP - QJxx40xx Series

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The 40 Amp bi-directional solid state switch series is designed for AC switching and phase control applications such as motor speed, temperature modulation controls, lighting controls, and static switching relays. 

Alternistor type components only operate in quadrants I, II, & III and are used in circuits requiring high dv/dt capability.

Standard type devices operate in quadrants I,II,III & IV.


  • RoHS Compliant 
  • Voltage capability up to 800V 
  • Surge capability up to 500A
  • Electrically isolated for 2500Vrm
  • UL Recognized to UL 1557 as an Electrically Isolated Semiconductor Device
  • High TJ of 150°C


Excellent for AC switching and phase control applications such as heating, lighting, and motor speed controls. 

Typical applications are AC solid-state switches, industrial power tools, exercise equipment, white goods and commercial appliances.

Alternistor Triacs (no snubber required) are used in applications with extremely inductive loads requiring highest commutation performance. 

Internally constructed isolated packages are offered for ease of heat sinking with highest isolation voltage.

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