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STMicroelectronics T2035H-8G-TR
- Part No.:
- T2035H-8G-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
T2035H-8G-TR.pdf
- Description:
- TRIAC ALTERNISTOR 800V 20A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:2,014
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Product details
Overview
T2035H-8G-TR from STMicroelectronics is a 20 A, 800 V RMS-rated snubberless triac in D²PAK package, designed for high-noise industrial and home appliance AC load control. It supports three-quadrant triggering, delivers 2000 V/µs static dV/dt immunity at 150 °C junction temperature, and enables compact heatsink design for universal motor and heater drive.
For engineers reviewing the T2035H-8G-TR datasheet, T2035H-8G-TR pinout, T2035H-8G-TR application, or T2035H-8G-TR equivalent, key selection criteria include verified 150 °C thermal operation, robust (dl/dt)c ≥ 20 A/ms commutation without snubber, and ECOPACK2-compliant D²PAK packaging for high-reliability AC line switching.
Technical Context
This triac implements ST's Snubberless high-temperature technology to sustain 150 °C junction operation while maintaining 800 V repetitive blocking voltage and 900 V non-repetitive peak voltage. Its gate trigger current (IGT) is specified from 5 mA min to 35 mA max across quadrants I, II, and III - enabling reliable turn-on under noisy conditions.
The device achieves 2000 V/µs static dV/dt immunity at Tj = 150 °C and minimum critical commutation current rate (dl/dt)c of 20 A/ms without external snubbers. On-state characteristics include VTM ≤ 1.55 V at 25 °C and dynamic resistance RD ≤ 19 mΩ at 150 °C, supporting low conduction loss in high-current AC loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 20 A - Sustains continuous AC load current up to 20 A at Tc = 128 °C, enabling direct drive of heavy heaters and motors. |
| VDRM/VRRM | 800 V - Repetitive blocking voltage rating ensures safe operation on 230 VAC mains with >2× safety margin. |
| Tj max. | 150 °C - Extended junction temperature capability allows compact thermal design without derating in enclosed appliances. |
| dV/dt (static) | 2000 V/µs at Tj = 150 °C - High noise immunity prevents false triggering in EMI-prone environments like motor drives. |
| (dl/dt)c | 20 A/ms at Tj = 150 °C - Robust commutation enables snubberless turn-off of inductive loads including universal motors. |
| Rth(j-c) | 1.0 °C/W - Low junction-to-case thermal resistance supports efficient heat transfer to heatsink in D²PAK package. |
| IGT | 5–35 mA across QI/QII/QIII - Guaranteed gate sensitivity across all triggering quadrants for flexible control circuit design. |
Pinout & Package
D²PAK (TO-263) package with isolated tab (A2), standard 3-pin layout optimized for high-power AC switching and PCB thermal management. Tab is electrically connected to MT2 (A2) terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate triggering; polarity defines quadrant operation during AC half-cycle conduction. |
| A2 (MT2) | Main Terminal 2 | Connected to exposed metal tab; serves as high-current output path and primary thermal interface to heatsink. |
| G | Gate | Low-energy control input requiring ≤35 mA pulse; triggers conduction between A1 and A2 in any active quadrant. |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless commutation | Guaranteed (dl/dt)c ≥ 20 A/ms at 150 °C eliminates need for external RC snubber networks in motor control. |
| High-temperature operation | Rated for continuous 150 °C junction temperature - reduces heatsink size by up to 40% vs. 125 °C-rated triacs. |
| Three-quadrant triggering | Valid gate trigger in quadrants I, II, and III - simplifies driver design and improves reliability over single-quadrant parts. |
| ECOPACK2 compliance | Lead-free terminations, halogen-free molding compound, UL94 V0 rated - meets RoHS and environmental requirements for global markets. |
Applications
| Smart AC Plug Control | Universal Motor Drive |
|---|---|
|
Use Scenario: Smart plug regulating 230 VAC resistive and inductive loads in IoT-enabled home automation systems. IC Role / Device Role / Timing Role: Main AC power switch controlling on/off and phase-angle dimming via microcontroller-driven gate pulses. Use Value: 2000 V/µs dV/dt immunity prevents false triggering from switching transients in shared household circuits. |
Use Scenario: Speed and torque control of universal motors in vacuum cleaners, power tools, and blenders. IC Role / Device Role / Timing Role: Bidirectional AC switch enabling phase-controlled power delivery synchronized to zero-crossing detection. Use Value: Snubberless (dl/dt)c ≥ 20 A/ms ensures clean turn-off during high-inductance motor current decay without snubber losses. |
| Water Heater Load Switching | Inrush Limiter for AC/DC Rectifiers |
|
Use Scenario: Solid-state replacement for electromechanical relays in tankless and storage water heaters. IC Role / Device Role / Timing Role: High-current AC line switch handling 20 A RMS resistive load with thermal stability up to 150 °C ambient. Use Value: Rth(j-c) = 1.0 °C/W enables direct mounting to small aluminum heatsinks, reducing system volume by 30%. |
Use Scenario: Inrush current limiting during cold-start of bridge rectifiers feeding large bulk capacitors. IC Role / Device Role / Timing Role: Soft-start switch bypassing NTC thermistor after capacitor charging completes. Use Value: 210 A non-repetitive surge rating (t = 16.7 ms) safely absorbs rectifier turn-on surges without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac-based AC line switching 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-EMI environments; requires larger heatsink due to higher Rth(j-c) ≈ 2.5 °C/W. | Prefer when cost-sensitive, non-RoHS designs accept reduced thermal/noise margins. |
| Q6025LH4 | 25 A/600 V triac in TO-220; rated only to 125 °C; lacks snubberless commutation spec; gate IGT up to 50 mA. | Suitable for 115 VAC systems only; not recommended for 230 VAC universal motor loads above 1 kW. | Select only for legacy 115 VAC industrial controls where 600 V blocking suffices and thermal headroom is ample. |
Compared with BTB20-800CW and Q6025LH4, the T2035H-8G-TR provides superior thermal headroom (150 °C), higher noise immunity (2000 V/µs), and verified snubberless operation - making it the only choice for compact, high-reliability 230 VAC smart appliance designs.
Availability
T2035H-8G-TR is available at Aetrix Electronics and suitable for home appliance control, industrial motor drives, and smart energy management systems requiring stable component supply and long-term lifecycle support.
Supply support for T2035H-8G-TR 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, analog, MCU, and sensor technologies for industrial, automotive, and consumer applications.
The T2035H-8G-TR belongs to ST's STPOWER Triac family, engineered specifically for high-temperature, snubberless AC switching in space-constrained home and industrial appliances - prioritizing thermal efficiency, EMI resilience, and environmental compliance.
FAQ
What is the maximum allowable case temperature for continuous 20 A operation?
The T2035H-8G-TR sustains 20 A RMS current at Tc = 128 °C, as confirmed in Table 1 of DS13157 Rev 3. Operation above this temperature requires current derating per Figure 2; exceeding 128 °C risks thermal runaway even if Tj remains below 150 °C due to Rth(j-c) limits.
Does this triac require a heatsink in all applications?
Yes - the D²PAK package requires a heatsink for any sustained IT(RMS) > 2 A in free air, per Figure 3 and thermal resistance data. At 20 A, a heatsink with Rth(c-a) ≤ 1.5 °C/W is mandatory to maintain Tc ≤ 128 °C; PCB copper area alone (even 30 cm²) cannot replace mechanical heatsinking.
Can the T2035H-8G-TR be used in zero-crossing switched applications?
Yes - its three-quadrant triggering and low IGT (5–35 mA) support reliable zero-crossing gate drive using standard optotriac couplers like MOC3021. However, its high dV/dt immunity means it does not require zero-crossing operation to prevent false triggering, unlike older triac families.
Is the D²PAK tab (A2) electrically isolated from the PCB ground plane?
No - the D²PAK tab is internally connected to MT2 (A2) and must be electrically insulated from other PCB traces or heatsinks unless A2 is intentionally tied to system ground. ST recommends using insulating thermal pads or mica washers when mounting to grounded heatsinks to avoid short circuits.
T2035H-8G-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ECOPACK®2
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- 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-TR FAQ
1.How can I place an order for T2035H-8G-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for T2035H-8G-TR 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-TR reliable?
The price and inventory of T2035H-8G-TR 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-TR is usually 5 days.
3.What payment methods are accepted for T2035H-8G-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T2035H-8G-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T2035H-8G-TR?
T2035H-8G-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T2035H-8G-TR 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-TR?
For technical support, including T2035H-8G-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T2035H-8G-TR requirements.
6.How does Aetrix verify that T2035H-8G-TR is sourced from the original manufacturer or authorized distributors?
All T2035H-8G-TR 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-TR meets industry standards.
7.What is the process for return or replacement of T2035H-8G-TR?
All T2035H-8G-TR units undergo pre-shipment inspection (PSI). If there is an issue with T2035H-8G-TR, 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-TR part is unused and in its original packaging.
Return procedure for T2035H-8G-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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