QJxx25xHx Series - 25Amp High Temperature Alternistor TRIAC

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This 25A high temperature Alternistor TRIAC, offered in TO-220AB, TO-220 isolated and TO-263, as well as robust TO-218 Isolated and TO-218X isolated with loop lead.

This TRIAC has 150C maximum junction temperature and 250A ITSM(60Hz). This series enables easier thermal management and higher surge handling capability in AC power control applications such as heater control, motor speed control, lighting controls, and static switching relays. Alternistor TRIAC operates in quadrants I, II, & III and offers high performance in applications requiring high commutation capability.


  • High TJ of 150°C
  • Voltage capability up to 600V
  • Surge capability of 250A at 60Hz half cycle
  • Mechanically and thermally robust TO-220 and TO-218 clip-attach assembly
  • Internally-isolated TO-220 and TO-218 packages
  • Halogen free and RoHS compliant


TRIAC is an excellent AC switch in applications such as heating, lighting, and motor speed controls.

Typical applications are:

  • Heater control such as coffee brewer, tankless water heater and infrared heater
  • AC solid-state relays
  • Light dimmers including incandescent and LED lighting
  • Motor speed control in kitchen appliances, power tools, home/brow/white goods and light industrial applications as compressor motor control

Alternistor TRIAC is used with high inductive loads requiring the high commutation capability. Internally isolated packages offer better heat sinking with higher isolation voltage.

Access specifications, certifications, check availability and order parts below

Catalog #SizeIT(RMS) (A)VDRM (V)IDRM@
di/dt @
QJ4025JH6TPTO218X254000.018080801.8250100Through Hole RadialCheckOrder
QJ4025KH6TPTO218254000.018080801.8250100Through Hole RadialCheckOrder
QJ4025LH5TPTO220L254000.015050501.8250100Through Hole RadialCheckOrder
QJ4025LH6TPTO220L254000.018080801.8250100Through Hole RadialCheckOrder
QJ4025NH5RPTO263254000.015050501.8250100Through Hole RadialCheckOrder
QJ4025NH6RPTO263254000.018080801.8250100Through Hole RadialCheckOrder
QJ4025RH5TPTO220R254000.015050501.8250100Through Hole RadialCheckOrder
QJ4025RH6TPTO220R254000.018080801.8250100Through Hole RadialCheckOrder
QJ6025JH6TPTO218X254000.018080801.8250100Through Hole RadialCheckOrder
QJ6025KH6TPTO218254000.018080801.8250100Through Hole RadialCheckOrder
QJ6025LH5TPTO220L254000.015050501.8250100Through Hole RadialCheckOrder
QJ6025LH6TPTO220L254000.018080801.8250100Through Hole RadialCheckOrder
QJ6025NH5RPTO263254000.015050501.8250100Through Hole RadialCheckOrder
QJ6025NH6RPTO263254000.018080801.8250100Through Hole RadialCheckOrder
QJ6025RH5TPTO220R254000.015050501.8250100Through Hole RadialCheckOrder
QJ6025RH6TPTO220R254000.018080801.8250100Through Hole RadialCheckOrder
QJ8025LH4TPTO-220 Isolated258004mA@150C3535351.8250100Through Hole RadialCheckOrder
QJ8025LH5TPTO-220 Isolated258004mA@150C5050501.8250100Through Hole RadialCheckOrder
QJ8025NH4RPTO263258004mA@150C3535351.8250100Surface MountCheckOrder
QJ8025NH5RPTO263258004mA@150C5050501.8250100Surface MountCheckOrder
QJ8025RH4TPTO-220 Non-Isolated258004mA@150C3535351.8250100Through Hole RadialCheckOrder
QJ8025RH5TPTO-220 Non-Isolated258004mA@150C5050501.8250100Through Hole RadialCheckOrder

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