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Product Detailed Parameters
- Description：TRIAC ALTERNISTOR 800V 8A D2PAK
- Series：Snubberless™
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Triac Type：Alternistor - Snubberless
- Voltage - Off State：800 V
- Current - On State (It (RMS)) (Max)：8:00 AM
- Voltage - Gate Trigger (Vgt) (Max)：1.2 V
- Current - Non Rep. Surge 50, 60Hz (Itsm)：80A, 84A
- Current - Gate Trigger (Igt) (Max)：50 mA
- Current - Hold (Ih) (Max)：75 mA
- Configuration：Single
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Supplier Device Package：D2PAK
- Grade：-
- Qualification：-
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Overview
The T850-8G-TR is an 8 A Snubberless Triac in a D2PAK surface-mount package. It features a repetitive peak off-state voltage of 800 V and a gate trigger current of 50 mA. The device has an on-state RMS current rating of 8 A, with a non-repetitive peak on-state current of 80 A. On-state voltage is 1.55 V at rated conditions, while leakage current is 5 uA. Operating temperature ranges from -40 C to +125 C.
Feature Summary
- Snubberless design optimized for high commutation performance on inductive loads
- Logic level interface compatible with low power drivers such as microcontrollers
- Surface-mount D2PAK package suitable for automated assembly
Applications
- Static relays
- Heating regulation systems
- Induction motor starting circuits
- Phase control operation in light dimmers
- Motor speed controllers
Procurement Notes
Verify the specific tape-and-reel packaging designation against the manufacturer's official documentation before procurement. Confirm that the suffix corresponds to the required reel quantity and handling specifications. Ensure compatibility with standard SMD reflow profiles and storage conditions defined in the datasheet.
Selection Notes
Select this component for AC switching applications requiring direct MCU interfacing without additional buffer circuits. The 800 V rating supports general purpose mains voltages. Verify thermal management requirements for the D2PAK package under continuous 8 A load conditions to ensure junction temperature remains within the specified operational limits.
Part Context
This part belongs to the T850 series of Snubberless Triacs manufactured by STMicroelectronics. The series includes through-hole and surface-mount variants designed for general purpose AC switching. The T850-8G-TR specifically denotes the 800 V version in a tape-and-reel format for surface-mount technology.
Replacement Considerations
Check for other T850 series variants with different voltage ratings or package types. Verify pinout compatibility and electrical parameters before substituting with similar triacs from other manufacturers.
