The T405-600B-TR from STMicroelectronics is a 4A logic-level Triac from the T4 series. It features a three-quadrant triggering architecture, a 600V repetitive peak off-state voltage, and a 4A RMS on-state current, making it suitable for AC load switching and phase-control applications.
The device has a maximum gate trigger current of 5mA, classifying it as a logic-level Triac with relatively low gate-drive requirements. Maximum gate trigger voltage is 1.3V, while maximum holding current for the T405 version is approximately 10mA.
The T405-600B-TR supports a non-repetitive surge on-state current of up to 30A at 50Hz and 31A at 60Hz. Maximum on-state voltage is 1.56V at 5.5A. ST recommends the T4 family for general-purpose AC inductive loads, including universal motors, electrovalves, power tools, kitchen appliances and dishwashers.
The device is supplied in a DPAK surface-mount package weighing approximately 0.3g. Its operating junction temperature range is -40°C to +125°C, with storage capability from -40°C to +150°C. The “-TR” suffix indicates tape-and-reel packaging, with a standard base quantity of 2500 pieces. ST currently lists the orderable part as Active and ECOPACK®2/RoHS compliant.
Key Specifications:
- Brand: STMicroelectronics
- Part Number: T405-600B-TR
- Series: T4
- Product Type: Triac
- Triggering Quadrants: Three
- Type: Logic Level
- RMS On-State Current: 4A
- Repetitive Peak Off-State Voltage: 600V
- Maximum Gate Trigger Current: 5mA
- Maximum Gate Trigger Voltage: 1.3V
- Maximum Holding Current: 10mA
- Surge On-State Current: 30A @ 50Hz / 31A @ 60Hz
- Maximum On-State Voltage: 1.56V @ 5.5A
- Critical Rate of Rise of On-State Current: 50A/μs
- Peak Gate Current: 4A
- Average Gate Power Dissipation: 1W
- Operating Junction Temperature: -40°C to +125°C
- Storage Temperature: -40°C to +150°C
- Package: DPAK
- Mounting Type: SMD / SMT
- Device Weight: Approx. 0.3g
- Packaging: Tape & Reel
- Standard Pack Quantity: 2500 pcs
- Environmental Compliance: ECOPACK®2 / RoHS
- Product Status: Active







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