QJ4008DH2RP

Triacs Overview

The Littelfuse QJ4008DH2RP is a high-temperature Alternistor triac designed for robust AC power control applications. It features an RMS on-state current of 8 A and a repetitive peak off-state voltage of 400 V. The device operates within a junction temperature range of -40°C to +125°C. Key electrical parameters include a maximum holding current of 35 mA, a gate trigger voltage of 1.3 V, and a gate trigger current of 35 mA. It exhibits a typical on-state voltage of 1.6 V and a non-repetitive peak on-state current capability of 83 A or 100 A depending on the specific test condition. The component is housed in a surface-mount TO-252 (D-Pak) package.

Triacs Feature Summary

• Snubberless design enables direct connection to microprocessor drivers without external RC snubber networks
• High thermal stability supports operation at elevated junction temperatures up to 125°C
• Robust construction provides high surge current handling capability for demanding AC loads

Triacs Applications

• Solid-state relays and contactors
• Motor speed control circuits
• Lighting dimmer switches
• Heating element control systems

Triacs Procurement Notes

Verify the specific suffix DH2RP against the manufacturer's latest datasheet to confirm pinout and electrical characteristics. Ensure the ordering quantity meets the manufacturer's minimum packaging requirements. Confirm RoHS compliance status and REACH SVHC declarations prior to integration into final assemblies.

Triacs Selection Notes

Select this component when a snubberless triac with 8 A RMS current capacity is required. The 400 V rating suits low-voltage AC mains applications. Consider the TO-252 package for surface-mount assembly constraints. Evaluate thermal management needs given the 125°C maximum junction temperature limit.

Triacs Part Context

This part belongs to the Littelfuse QJxx08xH series of Alternistors. These devices are engineered as high-temperature, snubberless triacs intended to replace traditional thyristors in compact AC switching designs. The series emphasizes ease of use by eliminating the need for complex gate drive protection circuits.

Triacs Replacement Considerations

Direct substitutes may include other Littelfuse snubberless triacs within the same current and voltage ratings, such as variants from the QJxx08xH family. Verify equivalent holding current and gate trigger specifications before substitution.