Q2004V4

Triacs Overview

The Littelfuse Q2004V4 is a bidirectional triac from the Teccor Qxx04xx series, designed for general-purpose AC power control applications. It features a rated repetitive off-state voltage (VDRM) of 200 V and an RMS on-state current (It RMS) of 4 A. The device operates within a junction temperature range of -40°C to +125°C and utilizes a TO-251-3 (SOT-143) surface-mount package. Key electrical parameters include a maximum holding current of 30 mA, a gate trigger voltage of 2.5 V, and a gate trigger current ranging from 25 mA to 50 mA. The on-state voltage is specified at 1.6 V, with a non-repetitive peak on-state current capability of 46 A or 55 A depending on pulse width.

Triacs Feature Summary

• Electrically isolated package construction for enhanced safety in sensitive circuits
• Glass-passivated junctions providing robust protection against voltage transients
• Surface-mount TO-251-3 packaging optimized for automated assembly processes

Triacs Applications

• Solid-state relays requiring compact form factors
• Lighting control systems for residential and commercial fixtures
• Motor speed control circuits for small appliances

Triacs Procurement Notes

Verify the specific suffix 'V4' against the manufacturer's official datasheet to confirm pinout orientation and thermal characteristics, as suffixes often denote mechanical variations rather than electrical changes. Ensure compliance with RoHS directives by checking the latest component certification documents provided by Littelfuse before finalizing procurement specifications.

Triacs Selection Notes

Select this component when a 200 V rating is sufficient for low-voltage AC loads and surface-mount integration is required. Compare the 4 A RMS current capacity against load requirements to ensure adequate margin. Consider the TO-251-3 package dimensions for PCB layout constraints and verify that the gate trigger sensitivity matches the driving circuit capabilities.

Triacs Part Context

This part belongs to the Teccor Qxx04xx family of standard triacs manufactured by Littelfuse. The series offers a range of voltage ratings from 200 V to 1000 V with current ratings typically spanning 0.8 A to 35 A. These devices are widely used in consumer electronics and industrial controls where reliable AC switching is needed.

Triacs Replacement Considerations

Direct replacements may include other 200 V, 4 A triacs in TO-251-3 packages such as the STMicroelectronics BTA16 series or ON Semiconductor TRIACs, provided pinouts and thermal ratings are compatible. Always verify gate sensitivity and holding current specifications to ensure functional equivalence.