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STMicroelectronics T850H-6T
- Part No.:
- T850H-6T
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
T850H-6T.pdf
- Description:
- TRIAC ALTERNISTOR 600V 8A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:1,845
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Product details
Overview
T850H-6T from STMicroelectronics is a high-temperature, snubberless 8 A triac in TO-220AB package, rated for 600 V repetitive peak off-state voltage (VDRM/VRRM), 50 mA maximum gate trigger current (IGT), and operation up to 150 °C junction temperature. It delivers robust commutation at elevated temperatures and is engineered for universal motor control in vacuum cleaners and washing machine drum motors.
For engineers reviewing the T850H-6T datasheet, T850H-6T pinout, T850H-6T application, or T850H-6T equivalent, this part supports high-density AC mains switching with verified 150 °C turn-off commutation, low thermal resistance (Rth(j-c) = 1.85 °C/W), and high dV/dt immunity (1500 V/µs at Tj = 150 °C).
Technical Context
The T850H-6T is a three-quadrant snubberless triac optimized for high-temperature, high-reliability AC switching without external snubbers. Its internal ceramic pad provides 2500 VRMS insulation, and its clip-bonded construction ensures low thermal resistance and stable performance across -40 to +150 °C junction range.
It features guaranteed 1500 V/µs critical dV/dt (Tj = 150 °C), 14 A/ms critical rate of decrease of on-state current (dI/dt)c, and 1.5 V max on-state voltage (VT) at 11 A - enabling compact heatsink designs in space-constrained motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 8 A RMS on-state current at TC = 133 °C - supports continuous 8 A load handling with standard heatsinking |
| VDRM / VRRM | 600 V - withstands peak mains voltages up to 230 VAC + margin, suitable for global 230/240 V systems |
| IGT (max) | 50 mA - defines minimum gate drive requirement for reliable turn-on in all quadrants |
| dV/dt (min) | 1500 V/µs at Tj = 150 °C - eliminates need for snubber networks in noisy motor-control environments |
| Rth(j-c) | 1.85 °C/W - enables efficient heat transfer to heatsink, reducing thermal derating in high-power density designs |
| (dI/dt)c (min) | 14 A/ms at Tj = 150 °C - ensures clean commutation during zero-crossing switching in universal motors |
| VT (max) | 1.5 V at ITM = 11 A - limits conduction losses to ≤16.5 W at peak current, improving system efficiency |
Pinout & Package
Package: TO-220AB (non-insulated, through-hole). Case serves as A2 terminal; tab is electrically connected to A2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Main Terminal 1 | Current return path; referenced to A2; forms main conduction path with A2 |
| A2 | Main Terminal 2 / Heatsink Tab | Primary current input and mechanical thermal interface; electrically tied to case |
| G | Gate | Control input for triggering conduction; requires ≥50 mA pulse for guaranteed turn-on in Quadrants I, II, III |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless operation | Validated 1500 V/µs dV/dt immunity eliminates external RC snubber components, reducing BOM count and PCB area |
| 150 °C junction-rated commutation | Guaranteed turn-off capability at full 150 °C Tj - enables operation in sealed, high-ambient motor enclosures |
| Low Rth(j-c) | 1.85 °C/W thermal resistance - allows 8 A RMS current with smaller heatsinks than conventional triacs |
| High 3-quadrant commutation | Stable triggering and holding in Quadrants I, II, and III - essential for phase-angle control in universal motor speed regulation |
| 2500 VRMS isolation | Internal ceramic pad provides reinforced insulation between A2 tab and PCB - meets basic safety requirements for Class I appliances |
Applications
| Vacuum Cleaner Motor Control | Washing Machine Drum Motor |
|---|---|
|
Use Scenario: Variable-speed universal motor drive in portable vacuum cleaners with compact enclosure and limited airflow. IC Role / Device Role / Timing Role: Main AC power switch controlling motor torque and speed via phase-angle firing. Use Value: Snubberless design and 150 °C rating allow direct mounting to small metal chassis without external snubber or oversized heatsink. |
Use Scenario: High-torque drum motor in front-loading washing machines operating under humid, thermally stressed conditions. IC Role / Device Role / Timing Role: Mains-frequency AC switching element in TRIAC-based motor controller board. Use Value: 14 A/ms (dI/dt)c and 1500 V/µs dV/dt ensure reliable commutation during rapid direction reversal and load transients. |
| Power Tool Speed Regulators | Industrial Fan Controllers |
|
Use Scenario: Handheld power tools (e.g., drills, sanders) requiring rugged, thermally resilient AC switching. IC Role / Device Role / Timing Role: Primary power switch in analog phase-control circuitry interfacing with potentiometer and zero-crossing detector. Use Value: Clip-bonded construction and low Rth(j-c) sustain 8 A RMS under intermittent high-load duty cycles without thermal shutdown. |
Use Scenario: Constant-air-volume HVAC fans in commercial buildings with ambient temperatures up to 70 °C. IC Role / Device Role / Timing Role: Line-voltage AC switch modulating fan speed via leading-edge phase control. Use Value: TO-220AB package enables direct bolt-down heatsinking to metal chassis, supporting continuous 8 A operation at 60 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac-based AC switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BTB16-600BW | 16 A RMS rating, 600 V VDRM, but only rated to 125 °C Tj; higher IGT (50 mA same, but less margin at temp) | Higher current headroom but lower thermal ceiling - unsuitable for sustained 150 °C environments | Select when higher surge current (ITSM = 160 A) is prioritized over junction temperature margin |
| T835H-6T | Same package and voltage rating, but 35 mA max IGT and lower (dI/dt)c (11 A/ms); identical thermal specs | Better gate sensitivity but reduced commutation robustness - preferred for low-noise, low-dI/dt loads | Select when driving lighter universal motors where gate drive current is constrained and dV/dt stress is moderate |
Compared with BTB16-600BW and T835H-6T, the T850H-6T uniquely balances 8 A current capacity, 150 °C thermal resilience, and 1500 V/µs dV/dt immunity - making it optimal for thermally aggressive, noise-prone universal motor applications where snubber elimination and long-term reliability are critical.
Availability
T850H-6T is available at Aetrix Electronics and suitable for vacuum cleaner motor drives, washing machine drum controllers, and industrial fan speed regulators requiring stable component supply and long-lifecycle support.
Supply support for T850H-6T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The T850H-6T belongs to ST's Snubberless™ Triac product line, developed specifically for high-reliability, high-temperature AC mains switching in universal motor and resistive load applications where thermal robustness and snubber-free operation are mandatory.
FAQ
What is the maximum junction temperature for continuous operation of the T850H-6T?
The T850H-6T is rated for continuous operation from -40 °C to +150 °C junction temperature. Its 150 °C turn-off commutation capability is fully characterized and guaranteed per Table 2 and Figure 2 in the official datasheet, enabling use in sealed, high-ambient motor housings without thermal derating penalties.
Does the T850H-6T require an external snubber circuit?
No. The T850H-6T is a certified snubberless triac with a minimum critical dV/dt of 1500 V/µs at 150 °C junction temperature. This specification eliminates the need for external RC snubber networks in typical universal motor and resistive load switching applications, reducing component count and layout complexity.
How is thermal management handled given the TO-220AB package?
The TO-220AB package features a low Rth(j-c) of 1.85 °C/W, and the metal tab (A2) is electrically and thermally connected to the die. Effective thermal management requires direct mechanical mounting to a heatsink using thermal paste and appropriate torque; electrical isolation is not provided - insulation must be added externally if required.
Can the T850H-6T replace the T835H-6T in existing designs?
Yes, with functional trade-offs: both share identical package, voltage rating, and thermal specs, but the T850H-6T has higher IGT (50 mA vs. 35 mA) and superior (dI/dt)c (14 A/ms vs. 11 A/ms) and dV/dt (1500 V/µs vs. 1000 V/µs). Gate drive circuitry may require verification for compatibility, especially in low-current trigger scenarios.
T850H-6T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Snubberless™
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Alternistor - Snubberless
- Voltage - Off State:
- 600 V
- Current - On State (It (RMS)) (Max):
- 8 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
T850H-6T FAQ
1.How can I place an order for T850H-6T through Aetrix?
Please submit a Request for Quotation (RFQ) for T850H-6T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for T850H-6T reliable?
The price and inventory of T850H-6T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T850H-6T is usually 5 days.
3.What payment methods are accepted for T850H-6T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T850H-6T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T850H-6T?
T850H-6T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T850H-6T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for T850H-6T?
For technical support, including T850H-6T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T850H-6T requirements.
6.How does Aetrix verify that T850H-6T is sourced from the original manufacturer or authorized distributors?
All T850H-6T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that T850H-6T meets industry standards.
7.What is the process for return or replacement of T850H-6T?
All T850H-6T units undergo pre-shipment inspection (PSI). If there is an issue with T850H-6T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The T850H-6T part is unused and in its original packaging.
Return procedure for T850H-6T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T850H-6T Tags
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