BT134-800E,127

Overview

The BT134-800E,127 is a four-quadrant logic level Triac manufactured by WeEn Semiconductors. It features an RMS on-state current of 4 A and a rated repetitive peak off-state voltage (VDRM) of 800 V. The device has a non-repetitive peak on-state current of 27 A and a maximum holding current of 15 mA. Gate triggering parameters include a gate trigger voltage of 1.5 V and a gate trigger current of 70 mA. It operates within a temperature range of -40°C to +125°C and is housed in a TO-220AB package.

Feature Summary

• Four-quadrant sensitivity for reliable triggering across all AC line polarities
• Logic-level gate interface compatible with standard digital control circuits
• High thermal stability supporting operation up to +125°C junction temperature

Applications

• Solid-state relays requiring high isolation and low drive current
• AC motor speed control systems for small appliances
• Lighting dimmer circuits for residential and commercial use

Procurement Notes

Verify the specific suffix '127' against the manufacturer's official datasheet to confirm tape-and-reel packaging specifications. Ensure the component meets RoHS compliance requirements for your target market. Cross-reference the Mouser part number 771-BT134-800E,127 or equivalent distributor codes to validate authenticity and supply chain integrity before finalizing orders.

Selection Notes

Select this component when a 4 A RMS current rating and 800 V blocking voltage are required for AC switching applications. The logic-level gate characteristic simplifies driver design compared to standard gate Triacs. Consider the TO-220AB package for through-hole mounting and adequate heat dissipation without additional heatsinking in moderate duty cycles.

Part Context

This Triac belongs to the BT13x series from WeEn Semiconductors, designed for general-purpose AC power control. It serves as a robust alternative to legacy NXP designs, offering comparable electrical performance in a standardized TO-220AB flange-mount package. The series is widely used in consumer electronics and industrial controls where reliable phase-angle firing is necessary.

Replacement Considerations

Direct pin-compatible replacements include the BT136-800E and BT138-800E from the same manufacturer family. Verify that the substitute's gate trigger current matches the existing circuit design constraints. Other manufacturers such as STMicroelectronics offer similar 4 A/800 V Triacs in TO-220 packages, but thermal and electrical characteristics must be validated.