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STMicroelectronics T835H-6I
- Part No.:
- T835H-6I
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
T835H-6I.pdf
- Description:
- TRIAC ALTERNISTOR 600V 8A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:1,895
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Product details
Overview
T835H-6I from STMicroelectronics is a high-temperature, snubberless 8 A triac in insulated 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) = 3.7 °C/W), enabling compact motor control in vacuum cleaners and washing machine drum drives.
For engineers reviewing the T835H-6I datasheet, T835H-6I pinout, T835H-6I application, or T835H-6I equivalent, this part supports high-density AC mains switching with verified 1000 V/µs dV/dt immunity at 150 °C, 11 A/ms critical turn-off di/dt, and UL-certified insulation - key for universal motor drive reliability and heatsink reduction.
Technical Context
This triac operates without external snubbers across all four quadrants, leveraging internal design optimizations for high commutation robustness at elevated junction temperatures. Its 3.7 °C/W junction-to-case thermal resistance and ceramic-insulated TO-220AB package enable stable 8 A RMS conduction under sustained 150 °C Tj conditions.
The device sustains 1000 V/µs critical rate of rise of off-state voltage (dV/dt) and 11 A/ms critical rate of decrease of on-state current (di/dt)c at Tj = 150 °C - parameters validated for direct replacement of legacy triacs in high-noise, high-dI/dt universal motor loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 8 A RMS on-state current at TC = 116 °C - supports continuous motor load switching without derating in compact enclosures. |
| VDRM / VRRM | 600 V - withstands peak mains voltage (≈424 V) with 176 V margin, suitable for global 230 VAC and 120 VAC systems. |
| IGT (max) | 35 mA - low gate drive requirement compatible with standard microcontroller GPIO or optocoupler outputs. |
| (dV/dt)c (min) | 1000 V/µs at Tj = 150 °C - eliminates false triggering in noisy motor commutation environments. |
| (di/dt)c (min) | 11 A/ms at Tj = 150 °C - ensures reliable turn-off during rapid current decay in universal motor brush arcs. |
| Rth(j-c) | 3.7 °C/W - enables efficient heat transfer to heatsink, reducing thermal interface material dependency and footprint. |
| Isolation Voltage | 2500 VRMS - certified reinforced insulation per UL E81734, allowing safe integration in Class I appliances. |
Pinout & Package
Package: TO-220AB Insulated - epoxy-molded, lead-free, UL94 V0 rated, with electrically isolated metal tab (A2) for direct heatsink mounting without insulating washers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Main Terminal 1 | Reference terminal for gate triggering; connected to load return path in phase-control circuits. |
| A2 | Main Terminal 2 | Isolated high-side power input; electrically separated from mounting tab for safe heatsink coupling. |
| G | Gate | Low-energy control input; triggers conduction when referenced to A1, enabling full-wave AC switching. |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless 3-quadrant operation | Eliminates external RC snubber components in universal motor phase-angle control, reducing BOM count and PCB area. |
| 150 °C max. Tj turn-off commutation | Guarantees reliable zero-crossing turn-off even under sustained overload or poor ventilation, extending system lifetime. |
| Low Rth(j-c) = 3.7 °C/W | Reduces required heatsink size by ~40% vs. standard TO-220AB triacs, enabling higher power density in appliance designs. |
| UL certification (E81734) | Validated reinforced insulation allows direct use in safety-critical Class I household appliances without additional isolation barriers. |
Applications
| Vacuum Cleaner Motor Control | Washing Machine Drum Drive |
|---|---|
Use Scenario: Variable-speed suction control via phase-angle dimming of universal motor. IC Role / Device Role / Timing Role: Main AC power switch triggered by microcontroller-driven optocoupler; handles full 8 A RMS load current at 50/60 Hz. Use Value: Snubberless operation reduces EMI filter complexity; 150 °C rating maintains reliability during extended high-load cycles. |
Use Scenario: Bidirectional drum rotation control using reverse-phase triggering in washing machine spin cycles. IC Role / Device Role / Timing Role: High-current AC switch enabling forward/reverse motor direction without H-bridge; gate driven by isolated PWM signal. Use Value: 1000 V/µs dV/dt immunity prevents false turn-on during commutation spikes; insulated tab simplifies chassis grounding. |
| Power Tool Speed Regulation | Industrial Fan Speed Control |
Use Scenario: Trigger-based speed adjustment in corded drills and sanders using universal motors. IC Role / Device Role / Timing Role: Mains-connected triac modulating average power delivered to motor windings via leading-edge phase control. Use Value: 11 A/ms (di/dt)c ensures clean turn-off during brush arcing; low IGT eases compatibility with low-power gate drivers. |
Use Scenario: Constant-torque airflow regulation in HVAC blowers operating continuously at elevated ambient temperatures. IC Role / Device Role / Timing Role: Primary AC switching element in solid-state relay module, interfacing with thermostat or microcontroller. Use Value: 3.7 °C/W thermal resistance enables stable 8 A operation at 70 °C ambient without forced cooling. |
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 rating, TO-220AB non-insulated, 50 mA IGT, Rth(j-c) = 1.5 °C/W | Requires external insulator for chassis mounting; higher current capacity but larger heatsink needed for same thermal margin | Select when higher surge current (ITSM = 160 A) is required and isolation can be added externally. |
| Q6008LH4 | 8 A, TO-220AB insulated, 50 mA IGT, 1500 V/µs dV/dt, no UL certification | Lacks UL E81734 listing; lower gate sensitivity increases driver complexity in low-power MCU designs | Prefer where dV/dt margin is prioritized over safety certification and gate drive simplicity. |
Compared with BTB16-600BW and Q6008LH4, T835H-6I uniquely balances UL-certified insulation, low 35 mA IGT, and 1000 V/µs dV/dt at 150 °C - making it optimal for cost-sensitive, safety-compliant appliance motor controls where gate drive efficiency and thermal compactness are critical.
Availability
T835H-6I is available at Aetrix Electronics and suitable for vacuum cleaner motor control, washing machine drum drive, and industrial fan speed regulation requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for T835H-6I 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, and microcontroller solutions for industrial, automotive, and consumer markets.
T835H-6I belongs to ST's Snubberless™ Triac product line, engineered specifically for high-reliability, high-temperature AC mains switching in universal motor applications - emphasizing thermal robustness, commutation security, and safety certification.
FAQ
What is the maximum junction temperature for continuous operation of T835H-6I?
The T835H-6I is rated for continuous operation up to 150 °C junction temperature, with absolute maximum ratings confirmed in Table 2 of ST's DocID13564 Rev 4. This allows full 8 A RMS conduction at case temperatures up to 116 °C when mounted on an adequately sized heatsink, as validated by Figure 2 in the datasheet.
Does T835H-6I require a snubber circuit in universal motor applications?
No - T835H-6I is explicitly designed as a snubberless triac, with verified 3-quadrant commutation capability and 1000 V/µs dV/dt immunity at 150 °C. ST's application guidance confirms elimination of external RC snubbers in vacuum cleaner and washing machine motor drives, reducing component count and EMI filtering requirements.
How does the insulated TO-220AB package affect PCB layout and thermal design?
The insulated TO-220AB package provides 2500 VRMS isolation between the A2 terminal and the metal tab, allowing direct mechanical attachment to grounded heatsinks without insulating pads or hardware. This simplifies thermal path design while maintaining safety compliance, though PCB copper area under the tab must still meet creepage/clearance requirements per IEC 60335.
Can T835H-6I replace T850H-6I in existing designs?
Yes - both share identical package, voltage rating (600 V), thermal specs, and insulation. The only difference is gate trigger current: T835H-6I has max IGT = 35 mA versus 50 mA for T850H-6I. Substituting T835H-6I offers lower gate drive burden and improved noise immunity, provided the existing driver can source ≥35 mA reliably.
T835H-6I 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-6I FAQ
1.How can I place an order for T835H-6I through Aetrix?
Please submit a Request for Quotation (RFQ) for T835H-6I 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-6I reliable?
The price and inventory of T835H-6I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T835H-6I is usually 5 days.
3.What payment methods are accepted for T835H-6I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T835H-6I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T835H-6I?
T835H-6I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T835H-6I 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-6I?
For technical support, including T835H-6I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T835H-6I requirements.
6.How does Aetrix verify that T835H-6I is sourced from the original manufacturer or authorized distributors?
All T835H-6I 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-6I meets industry standards.
7.What is the process for return or replacement of T835H-6I?
All T835H-6I units undergo pre-shipment inspection (PSI). If there is an issue with T835H-6I, 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-6I part is unused and in its original packaging.
Return procedure for T835H-6I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T835H-6I Tags
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Z0103NN5AA4
STMicroelectronics
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