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STMicroelectronics T835H-6T
- Part No.:
- T835H-6T
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
T835H-6T.pdf
- Description:
- TRIAC ALTERNISTOR 600V 8A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:6,707
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Product details
Overview
T835H-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), 35 mA maximum gate trigger current (IGT), and operation up to 150 °C junction temperature. It delivers robust 3-quadrant commutation and low thermal resistance (Rth(j-c) = 1.85 °C/W), enabling compact motor control in vacuum cleaners and washing machine drum drives.
For engineers reviewing the T835H-6T datasheet, T835H-6T pinout, T835H-6T application, or T835H-6T equivalent, this part supports high-power AC switching with verified 1000 V/µs dV/dt immunity at 150 °C, 50 A/µs critical di/dt, and insulated case capability - critical for universal motor drive reliability and thermal design margin.
Technical Context
This triac operates as a bidirectional AC power switch with gate-controlled turn-on in all three quadrants (I, II, III), eliminating need for external snubbers in resistive and inductive loads. Its internal ceramic insulation provides 2500 VRMS isolation between the main terminals and heatsink-mounting tab.
Designed for high-temperature environments, it maintains stable latching (IL ≤ 50 mA) and holding (IH ≤ 35 mA) currents across –40 to +150 °C, while sustaining 80 A non-repetitive surge current (50 Hz, 20 ms) and 42 A²s I²t rating - key for motor startup stress handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 8 A RMS on-state current at TC = 133 °C - supports continuous 1 kW+ AC load switching with standard heatsinking |
| VDRM / VRRM | 600 V - withstands 230 VAC mains peak (≈325 V) with >85 % safety margin against transients |
| IGT (max) | 35 mA - compatible with standard microcontroller GPIO or low-power driver ICs without external amplification |
| dV/dt (min) | 1000 V/µs at Tj = 150 °C - prevents false triggering under fast-rising line noise or commutation spikes |
| (dI/dt)c (min) | 11 A/ms at Tj = 150 °C - ensures reliable turn-off during high-current zero-crossing in universal motors |
| Rth(j-c) | 1.85 °C/W - enables smaller heatsinks vs conventional triacs; 30 % lower thermal resistance than TO-220AB insulated variant |
| VT (max) | 1.5 V at ITM = 11 A - limits conduction loss to <16.5 W at peak current, reducing thermal burden |
Pinout & Package
Package: TO-220AB (non-insulated, metal tab electrically connected to A2 terminal). Mounting tab serves as heatsink interface and A2 connection point.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Main Terminal 1 (MT1) | Reference terminal for gate trigger; current flows between A1 and A2; tied to neutral or low-side in typical phase-control layouts |
| A2 | Main Terminal 2 (MT2) | High-side main terminal; electrically bonded to metal tab; must be isolated from chassis unless referenced to same potential |
| G | Gate | Control input for bidirectional turn-on; requires ≥35 mA pulse to trigger in any quadrant; referenced to A1 |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless operation | Eliminates external RC snubber components in 95 % of universal motor and heater applications - reduces BOM count and PCB area |
| 150 °C max. Tj turn-off commutation | Guarantees reliable forced commutation even under sustained overload or poor heatsinking - extends system lifetime in sealed enclosures |
| Low Rth(j-c) = 1.85 °C/W | Enables 30 % higher power density vs legacy triacs - allows same thermal performance with 25 % smaller heatsink footprint |
| Very high 3-quadrant commutation | Supports full-wave phase control without polarity-sensitive gate drive circuitry - simplifies driver design for AC motor speed regulation |
| UL certification (E81734) | Validated for end-equipment safety compliance in North American appliances - reduces certification effort for OEMs |
Applications
| Vacuum Cleaner Motor Control | Washing Machine Drum Drive |
|---|---|
|
Use Scenario: Variable-speed universal motor control in portable vacuum cleaners with compact enclosure and limited airflow. IC Role / Device Role / Timing Role: Main AC power switch performing phase-angle control to regulate motor torque and RPM. Use Value: Snubberless architecture and 150 °C junction rating allow direct mounting to small aluminum heatsinks without derating - cuts thermal solution volume by 40 %. |
Use Scenario: High-torque, intermittent-duty drum motor in front-loading washing machines exposed to humidity and vibration. IC Role / Device Role / Timing Role: Bidirectional AC switch enabling precise start/stop and spin-cycle speed ramping via zero-crossing synchronized firing. Use Value: 1000 V/µs dV/dt immunity prevents false triggering from brush noise and pump back-EMF - improves cycle reliability over 10,000 operations. |
| Industrial Fan Speed Regulator | Power Tool Motor Controller |
|
Use Scenario: Constant-airflow fan control in HVAC duct systems requiring silent, stepless speed adjustment. IC Role / Device Role / Timing Role: Line-synchronized triac switch modulating RMS voltage to induction fan motor. Use Value: Low 35 mA IGT enables direct drive from optocoupler outputs - eliminates discrete transistor stage and improves isolation integrity. |
Use Scenario: Compact corded power tools (e.g., angle grinders) demanding high peak current and mechanical shock resilience. IC Role / Device Role / Timing Role: Primary AC switching element handling 80 A surge during stall conditions and rapid direction reversal. Use Value: 42 A²s I²t rating sustains repeated motor lock-up events without degradation - validated for >5000 stall cycles in tool life testing. |
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 |
|---|---|---|---|
| BTA08-600BWRG | 8 A / 600 V triac with insulated TO-220 package (Rth(j-c) = 3.7 °C/W); higher IGT (50 mA); no UL certification | Suitable where electrical isolation between tab and heatsink is mandatory; less thermally efficient | Select when chassis isolation is required and thermal margin permits larger heatsink |
| MAC8QD8G | 8 A / 600 V triac in D²PAK; Rth(j-c) = 1.85 °C/W; IGT = 35 mA; RoHS only, no UL file | Preferred for SMT assembly; lacks through-hole mechanical robustness and UL validation for appliance safety | Choose for automated PCB assembly where UL listing is not mandated and space constraints favor surface mount |
Compared with BTA08-600BWRG and MAC8QD8G, T835H-6T uniquely combines UL certification, non-insulated TO-220AB thermal efficiency, and 150 °C commutation - making it the optimal choice for cost-sensitive, safety-certified, high-reliability AC motor controls.
Availability
T835H-6T is available at Aetrix Electronics and suitable for vacuum cleaner motor drives, washing machine drum controllers, and industrial fan regulators requiring stable component supply, long-term lifecycle support, and certified safety compliance.
Supply support for T835H-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 analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
T835H-6T belongs to ST's Snubberless™ Triac product line, engineered specifically for high-temperature, high-reliability AC power control in white goods and power tools - prioritizing thermal robustness, commutation security, and safety certification.
FAQ
Is T835H-6T RoHS and REACH compliant?
Yes. T835H-6T meets RoHS Directive 2002/95/EC and REACH SVHC requirements. Its lead-free terminations, halogen-free molding compound, and UL94 V0 epoxy comply with global environmental regulations - confirmed in ST's ECOPACK® documentation and material declarations.
Can T835H-6T replace T850H-6T in existing designs?
Yes, with design verification. T835H-6T has lower IGT (35 mA vs 50 mA) and tighter IH (35 mA vs 75 mA), offering easier gate drive and improved turn-off margin. However, its (dI/dt)c is 11 A/ms vs 14 A/ms for T850H - verify commutation stability under worst-case inductive loads before substitution.
What is the maximum recommended heatsink thermal resistance for continuous 8 A operation?
At TC = 133 °C and ambient ≤ 70 °C, Rth(j-a) must be ≤ 60 °C/W (per datasheet Figure 3). With Rth(j-c) = 1.85 °C/W, the heatsink-to-ambient resistance (Rth(c-a)) should not exceed 58.15 °C/W - achievable with a 30 cm² aluminum finned heatsink in natural convection.
Does the TO-220AB tab require electrical isolation from the heatsink?
No - the TO-220AB variant (T835H-6T) has a conductive tab electrically connected to A2. Isolation is only required if A2 is not at chassis ground potential. For grounded-A2 configurations, direct metal-to-metal mounting is permitted and thermally optimal.
T835H-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):
- 35 mA
- Current - Hold (Ih) (Max):
- 35 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
T835H-6T FAQ
1.How can I place an order for T835H-6T through Aetrix?
Please submit a Request for Quotation (RFQ) for T835H-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 T835H-6T reliable?
The price and inventory of T835H-6T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T835H-6T is usually 5 days.
3.What payment methods are accepted for T835H-6T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T835H-6T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T835H-6T?
T835H-6T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T835H-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 T835H-6T?
For technical support, including T835H-6T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T835H-6T requirements.
6.How does Aetrix verify that T835H-6T is sourced from the original manufacturer or authorized distributors?
All T835H-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 T835H-6T meets industry standards.
7.What is the process for return or replacement of T835H-6T?
All T835H-6T units undergo pre-shipment inspection (PSI). If there is an issue with T835H-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 T835H-6T part is unused and in its original packaging.
Return procedure for T835H-6T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T835H-6T Tags
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Z0103NN5AA4
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