QJ8012RH5TP

Triacs Overview

The Littelfuse QJ8012RH5TP is a 12 Amp high temperature Alternistor TRIAC rated for 800V blocking voltage. It operates in quadrants I, II, and III with a maximum junction temperature of 150°C. The device features a TO-220AB (R-package) non-isolated mounting tab common with the center lead. Key electrical parameters include an RMS on-state current of 12A at TC=132°C, a non-repetitive surge peak on-state current of 120A at 60Hz, and a gate trigger current (IGT) maximum of 50mA. The on-state voltage is typically 1.6V at 17.0A, and the holding current maximum is 50mA.

Triacs Feature Summary

• Alternistor design eliminates snubber requirements for extremely inductive loads
• High commutation capability suitable for hard switching applications
• Electrically isolated semiconductor device recognized to UL 1557
• Solid-state switching prevents arcing and contact bounce

Triacs Applications

• AC power control such as heater control and motor speed control
• Lighting controls and static switching relays
• AC solid-state switches, light dimmers, and power tools
• Lawn care equipment and home appliances

Triacs Procurement Notes

Verify the specific package type and sensitivity suffix against the official Littelfuse datasheet before ordering. Confirm thermal management requirements align with the specified case temperatures for the R-package. Ensure the application environment does not exceed the 150°C maximum junction temperature rating during operation.

Triacs Selection Notes

Select this component for AC phase control applications requiring high surge handling and commutation performance. The 50mA gate sensitivity suits standard drive circuits. Consider the TO-220R package for through-hole mounting where non-isolated heat sinking is acceptable. Verify dv/dt ratings match the circuit's transient conditions.

Triacs Part Context

This part belongs to the QJxx12xHx series of 12 Amp high temperature Alternistor Triacs from Littelfuse. The series includes variants with different voltage ratings, gate sensitivities, and packages including TO-220L, TO-220R, and TO-263 D²-PAK. All share the same core 12A current rating and 150°C junction temperature capability.

Triacs Replacement Considerations

Direct substitutes within the same family include QJ8012RH4TP (35mA sensitivity) or QJ8012NH5TP (TO-263 package). Cross-brand replacements require matching IT(RMS), VDRM, IGT, and package dimensions.