Q4025RH5

Triacs Overview

The Littelfuse Q4025RH5 is a bidirectional triac designed for AC power control applications. It features a 400V repetitive peak off-state voltage and an RMS on-state current rating of 25A. The device utilizes a TO-220AB package with three leads for through-hole mounting. Key electrical characteristics include a maximum gate trigger current of 50mA and a holding current of 50mA. It supports a non-repetitive peak on-state current of 208A and operates within a junction temperature range of -40°C to +125°C.

Triacs Feature Summary

• High thermal stability with a maximum junction temperature of 125°C
• Robust surge handling capability for inductive loads
• Sensitive gate drive requirement for microprocessor compatibility

Triacs Applications

• Solid-state relays
• Motor speed control circuits
• Lighting dimmer switches

Triacs Procurement Notes

Verify the specific suffix 'H5' against official Littelfuse documentation to confirm exact binning or testing parameters, as suffixes often denote specific manufacturing lot attributes rather than functional changes. Ensure the component source is an authorized distributor to guarantee authenticity and traceability for industrial deployments.

Triacs Selection Notes

Select this component when a 25A RMS current rating at 400V blocking voltage is required in a standard TO-220 package. Consider the 50mA gate trigger sensitivity for direct interface with logic-level drivers. Evaluate thermal management requirements based on the 125°C maximum junction temperature limit and expected ambient conditions.

Triacs Part Context

This part belongs to the Littelfuse Q series of high-power triacs. The Q series is engineered for general-purpose AC switching tasks. The Q4025RH5 specifically targets applications requiring moderate current handling with reliable latching characteristics in compact through-hole form factors.

Triacs Replacement Considerations

Cross-reference with other 25A/400V TO-220 triacs from manufacturers such as STMicroelectronics or WeEn Semiconductors. Verify that substitute parts match the 50mA gate trigger current and 208A surge rating to ensure circuit compatibility.