QJ8040KH5TP

Triacs Overview

The Littelfuse QJ8040KH5TP is a high-temperature bidirectional triac from the QJxx40xx series, rated for an RMS on-state current of 40 A and a repetitive peak off-state voltage of 800 V. It utilizes a TO-218AC (SMTO-218) through-hole package with an isolated tab. The device supports a maximum junction temperature of 150°C and operates within a range of -40°C to +150°C. Key electrical parameters include a non-repetitive peak on-state current of 500 A, a holding current maximum of 80 mA, and a gate trigger voltage of 1.3 V.

Triacs Feature Summary

• High-temperature operation capability up to 150°C junction temperature
• Electrically isolated mounting tab in TO-218AC package
• Snubberless alternistor design for noise immunity

Triacs Applications

• Industrial motor speed controls
• High-temperature heating element regulation
• Solid-state relays requiring thermal robustness

Triacs Procurement Notes

Verify the specific suffix 'H5' against the manufacturer's official datasheet for the QJ8040KH series. Confirm that the pinout and electrical characteristics match the intended circuit design before procurement. Ensure compliance with RoHS and REACH requirements as specified in the component documentation.

Triacs Selection Notes

Select this component when applications demand reliable switching at elevated temperatures exceeding standard 125°C limits. The 800V rating suits medium-voltage AC control circuits. Verify that the 40A RMS current capacity aligns with the load requirements and that the TO-218AC package fits the available board space and thermal management strategy.

Triacs Part Context

This part belongs to the Littelfuse QJxx40xx series of high-temperature triacs. These devices are engineered for demanding environments where standard silicon components may fail due to heat. The 'QJ' designation typically indicates a specific voltage and current class within the manufacturer's thyristor portfolio.

Triacs Replacement Considerations

Direct replacements must share the 40A/800V rating and TO-218AC isolated package. Check equivalent parts from other manufacturers such as STMicroelectronics or Microchip that offer similar high-temperature triacs with matching electrical specifications and pin configurations.