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STMicroelectronics T2035H-8G
- Part No.:
- T2035H-8G
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
T2035H-8G.pdf
- Description:
- TRIAC ALTERNISTOR 800V 20A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:1,553
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Product details
Overview
T2035H-8G from STMicroelectronics is a 20 A, 800 V RMS-rated snubberless triac in D²PAK package, designed for high-temperature (150 °C) AC load switching in industrial and home appliance applications. It supports three-quadrant triggering, delivers 2000 V/µs static dV/dt immunity at Tj = 150 °C, and achieves 20 A/ms critical commutation current (dl/dt)c without external snubbers - enabling robust control of universal motors, heaters, and inductive AC loads.
For engineers reviewing the T2035H-8G datasheet, T2035H-8G pinout, T2035H-8G application, or T2035H-8G equivalent, key selection criteria include its 1.0 °C/W junction-to-case thermal resistance, 35 mA gate trigger current, 900 V non-repetitive peak off-state voltage, and ECOPACK2-compliant D²PAK packaging for thermally demanding AC line control designs.
Technical Context
This triac implements ST's Snubberless high-temperature technology, enabling reliable turn-off commutation under high dl/dt stress up to 20 A/ms at 150 °C junction temperature without snubber networks. Its three-quadrant gate triggering supports simplified drive circuitry while maintaining high noise immunity via 2000 V/µs dV/dt rating at maximum Tj.
The device operates across -40 to +150 °C junction range with 1.55 V max on-state voltage at 25 °C and 0.8 V threshold voltage at 150 °C. Thermal design is optimized by the D²PAK package's 1.0 °C/W Rth(j-c), allowing compact heatsink implementation in space-constrained AC power modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 20 A - continuous RMS current handling at Tc = 128 °C, suitable for heavy-duty AC loads like water heaters and motor drives |
| VDRM / VRRM | 800 V - symmetrical repetitive blocking voltage, enabling direct use on 230 VAC mains with margin for transients |
| (dl/dt)c | 20 A/ms min at Tj = 150 °C - ensures reliable commutation for inductive loads without snubber components |
| dV/dt | 2000 V/µs min at Tj = 150 °C - suppresses false triggering in electrically noisy environments like motor control cabinets |
| Rth(j-c) | 1.0 °C/W max - enables efficient heat transfer to heatsink, reducing thermal derating in compact enclosures |
| IGT | 35 mA max - gate trigger current compatible with standard microcontroller GPIO or optocoupler drivers |
| Tj max | 150 °C - extended junction temperature rating allows operation in sealed, high-ambient-temperature appliances |
Pinout & Package
D²PAK package with isolated tab (A2 terminal), 3-pin configuration optimized for high-current AC switching and thermal conduction through the exposed copper pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Main Terminal 1 (Anode 1) | Primary current path input; referenced to gate for quadrant I/II triggering; connects to load return side |
| A2 | Main Terminal 2 (Anode 2) | Main current output; electrically connected to metal tab for thermal conduction; referenced to gate for quadrant III triggering |
| G | Gate | Control input for triac firing; accepts 35 mA max trigger current; enables three-quadrant operation with low sensitivity to noise |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless commutation | 20 A/ms (dl/dt)c minimum at 150 °C - eliminates need for external RC snubbers in motor and heater control |
| High-temperature operation | 150 °C max junction temperature - supports sealed enclosure designs without forced air cooling |
| Three-quadrant triggering | Quadrants I, II, and III supported - reduces gate drive complexity vs. full four-quadrant devices |
| Noise-immune gate | 2000 V/µs static dV/dt at Tj = 150 °C - prevents spurious turn-on in EMI-heavy industrial environments |
| ECOPACK2 compliance | Lead-free terminations, halogen-free molding compound - meets RoHS and REACH requirements for global appliance markets |
Applications
| Smart AC Plug Control | Water Heater Power Stage |
|---|---|
Use Scenario: Solid-state switching of 230 VAC, 16 A resistive loads in Wi-Fi-enabled smart plugs with zero-crossing detection. IC Role / Device Role / Timing Role: Main AC power switch; triggered synchronously with zero-crossing to minimize EMI and inrush. Use Value: 800 V VDRM provides 3.5× safety margin over 230 VAC peak; 20 A IT(RMS) supports 4.6 kW loads without derating at 128 °C case temperature. |
Use Scenario: Phase-angle dimming control of 3 kW heating elements in tankless water heaters with thermal feedback loop. IC Role / Device Role / Timing Role: High-current AC line switch modulated via phase-cut waveform to regulate thermal output. Use Value: 20 A/ms (dl/dt)c rating ensures clean turn-off during rapid current decay in inductive heater coils, eliminating snubber losses. |
| Universal Motor Speed Control | Inrush Limiter for Bridge Rectifiers |
Use Scenario: Variable-speed control of 1.2 kW vacuum cleaner motors using leading-edge phase control. IC Role / Device Role / Timing Role: Bidirectional AC switch synchronized to line voltage zero crossings and phase delay timing. Use Value: Three-quadrant triggering simplifies gate driver design; 150 °C Tj rating sustains performance during sustained high-torque operation. |
Use Scenario: Inrush current limiting in 2 kW AC/DC power supplies using NTC bypass with triac-triggered short-circuit. IC Role / Device Role / Timing Role: High-current bypass switch activated after capacitor charging completes. Use Value: 210 A non-repetitive surge rating (t = 16.7 ms) safely handles brief inrush events; D²PAK thermal interface minimizes transient junction rise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac-based AC line control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BTB20-800CW | 20 A/800 V triac in TO-220AB; lower dV/dt (1000 V/µs) and (dl/dt)c (10 A/ms); no ECOPACK2 compliance | Limited to lower-noise environments; requires larger heatsink due to higher Rth(j-c) ≈ 1.5 °C/W | Select when cost-sensitive TO-220 footprint is required and thermal/noise margins allow relaxation |
| T2035H-6G | Same D²PAK package and thermal specs, but rated for 600 V VDRM/VRRM instead of 800 V | Suitable only for 120 VAC or low-margin 230 VAC systems; reduced transient immunity | Choose only if system peak voltage stays below 424 V and 800 V margin is unnecessary |
Compared with BTB20-800CW and T2035H-6G, the T2035H-8G delivers superior thermal efficiency (1.0 °C/W vs. 1.5 °C/W), higher noise immunity (2000 vs. 1000 V/µs), and broader voltage margin (800 V vs. 600 V), making it optimal for compact, high-reliability 230 VAC industrial controls.
Availability
T2035H-8G is available at Aetrix Electronics and suitable for home appliance power stages, industrial motor controllers, and smart energy management systems requiring stable component supply and long-term lifecycle support.
Supply support for T2035H-8G 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, specializing in power management, analog, MCU, and sensor technologies for industrial, automotive, and consumer markets.
The T2035H-8G belongs to ST's STPOWER Triac family, engineered specifically for high-temperature, snubberless AC switching in space-constrained and thermally aggressive environments such as sealed home appliances and factory automation equipment.
FAQ
What is the maximum allowable case temperature for continuous 20 A operation?
The T2035H-8G supports 20 A RMS current at a case temperature (Tc) of 128 °C, as specified in Table 1 of DS13157. Operation above this temperature requires derating per Figure 2; at Tc = 100 °C, IT(RMS) is approximately 22 A, while at Tc = 80 °C it rises to ~24 A. Thermal design must maintain Tc ≤ 128 °C under worst-case ambient and airflow conditions.
Does the T2035H-8G require a heatsink in typical 230 VAC applications?
Yes - a heatsink is mandatory. With Rth(j-c) = 1.0 °C/W and Rth(c-a) highly dependent on PCB copper area, even at 10 A RMS, junction temperature exceeds 100 °C in free-air convection. Figure 6 recommends Rth(c-a) ≤ 25 °C/W for safe operation at 800 V blocking; this typically requires a 25–50 cm² aluminum heatsink mounted to the D²PAK tab via thermal interface material.
Can the T2035H-8G be driven directly by a 3.3 V microcontroller GPIO?
No - direct drive is not recommended. The gate trigger current is up to 35 mA at 25 °C (and increases with temperature), exceeding typical GPIO sink/source capability (usually ≤ 20 mA). A dedicated gate driver (e.g., MOC302x optocoupler or discrete transistor stage) is required to ensure reliable turn-on across temperature and manufacturing variation.
What is the significance of "H" and "8G" in the part number T2035H-8G?
Per ST's ordering scheme: "H" denotes high noise immunity and robust commutation performance (enhanced dV/dt and dl/dt ratings); "8" specifies 800 V VDRM/VRRM; "G" indicates D²PAK package. The "35" refers to 35 mA maximum gate trigger current, and "20" denotes 20 A RMS current rating - confirming its identity as a high-performance, high-temperature triac for demanding AC switching.
T2035H-8G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ECOPACK®2
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Alternistor - Snubberless
- Voltage - Off State:
- 800 V
- Current - On State (It (RMS)) (Max):
- 20 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 200A, 210A
- 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:
- Surface Mount
- Supplier Device Package:
- D2PAK
T2035H-8G FAQ
1.How can I place an order for T2035H-8G through Aetrix?
Please submit a Request for Quotation (RFQ) for T2035H-8G 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 T2035H-8G reliable?
The price and inventory of T2035H-8G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T2035H-8G is usually 5 days.
3.What payment methods are accepted for T2035H-8G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T2035H-8G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T2035H-8G?
T2035H-8G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T2035H-8G 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 T2035H-8G?
For technical support, including T2035H-8G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T2035H-8G requirements.
6.How does Aetrix verify that T2035H-8G is sourced from the original manufacturer or authorized distributors?
All T2035H-8G 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 T2035H-8G meets industry standards.
7.What is the process for return or replacement of T2035H-8G?
All T2035H-8G units undergo pre-shipment inspection (PSI). If there is an issue with T2035H-8G, 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 T2035H-8G part is unused and in its original packaging.
Return procedure for T2035H-8G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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