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STMicroelectronics T820-800W
- Part No.:
- T820-800W
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- ISOWATT220AB-3
- Datasheet:
-
T820-800W.pdf
- Description:
- TRIAC ALTERNISTOR 800V ISOWATT
- Quantity:
- Payment:
- Shipping:
Inventory:9,528
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Product details
Overview
T820-800W from STMicroelectronics is a snubberless 8A, 800V RMS TRIAC in ISOWATT220AB package, designed for phase-controlled AC switching in inductive loads. It delivers 100A non-repetitive surge current (50Hz/20ms), 55A²s I²t rating, and 50A/µs critical dI/dt-enabling robust motor control in washing machine drum drives without external snubbers.
For engineers reviewing the T820-800W datasheet, T820-800W pinout, T820-800W application, or T820-800W equivalent, key selection criteria include gate trigger current (20mA max), commutation robustness (dV/dt ≥300V/µs at 125°C), and thermal resistance (3.1°C/W junction-to-case), especially for high-reliability appliance motor controllers.
Technical Context
This TRIAC uses ST's Snubberless™ technology to achieve high commutation performance without external RC networks. Its design supports quadrant I, II, and III triggering with guaranteed 20mA maximum gate trigger current (IGT) and 35mA maximum holding current (IH) at 25°C.
The device operates across -40°C to +125°C junction temperature, features 1.4V max on-state voltage (VTM) at 11A, and maintains 40mΩ dynamic resistance (Rd) at 125°C-ensuring low conduction loss and stable turn-off under inductive load transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 8 A - Continuous AC load current handling capability at 100°C case temperature |
| VDRM/VRRM | 800 V - Peak repetitive off-state blocking voltage, enabling use in 230VAC mains with safety margin |
| IGT (max) | 20 mA - Maximum gate trigger current required for reliable turn-on, simplifying driver design |
| dV/dt (min) | 300 V/µs - Minimum rate of rise of off-state voltage before false triggering, critical for inductive noise immunity |
| I²t (fusing) | 55 A²s - Thermal energy withstand limit for short-circuit protection coordination |
| Rth(j-c) | 3.1 °C/W - Junction-to-case thermal resistance, defining heatsink sizing for 8A continuous operation |
| VTM (max) | 1.4 V - Maximum on-state voltage drop at 11A, directly determining conduction power loss (P ≈ 15.4W) |
Pinout & Package
Package: ISOWATT220AB - Insulated plastic power package with metal tab for heatsinking; mounting torque: 0.55 m·N recommended (max 0.70 m·N); dimensions per ST mechanical drawing (L3 = 28.6–30.6 mm, Diam = 3.0–3.2 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate triggering; connected to load return path in standard triac configurations |
| A2 (MT2) | Main Terminal 2 | High-side AC line connection; voltage polarity relative to A1 determines triggering quadrant |
| G | Gate | Control input requiring ≥20mA pulse to initiate conduction; referenced to A1 in most applications |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless commutation | Enables direct drive of inductive loads (e.g., universal motors) without external RC snubber networks |
| UL recognition | Complies with UL E81734, supporting safety-certified appliance designs without additional isolation validation |
| High dI/dt immunity | 50 A/µs critical rate-of-rise tolerance ensures reliable turn-on even with fast-rising gate pulses |
| Wide temperature range | -40°C to +125°C operating junction range supports deployment in sealed, thermally constrained enclosures |
| Low VTM & Rd | 1.4V max VTM and 40mΩ Rd minimize conduction losses and self-heating at full 8A RMS load |
Applications
| Washing Machine Drum Motor Control | Induction Cooktop Power Stage |
|---|---|
Use Scenario: Phase-angle controlled AC power delivery to universal motor driving washing machine drum rotation and spin cycles. IC Role / Device Role / Timing Role: Main power switching element; triggered by microcontroller-generated gate pulses synchronized to AC zero-crossing. Use Value: Snubberless operation eliminates 2–3 passive components per channel, reducing BOM cost and PCB area while maintaining EMI compliance. | Use Scenario: High-frequency AC power switching (20–50 kHz) to induction heating coils in domestic cooktops. IC Role / Device Role / Timing Role: Line-synchronized bidirectional switch controlling coil current magnitude and direction during half-cycle conduction. Use Value: 800V blocking voltage accommodates 230VAC mains with 2× safety margin; 100A surge rating handles startup inrush into resonant LC loads. |
| AC Fan Speed Controller | Industrial Lighting Dimmer |
Use Scenario: Variable-speed control of shaded-pole or PSC fans in HVAC systems using leading-edge phase-cut dimming. IC Role / Device Role / Timing Role: Bidirectional AC switch modulating RMS voltage applied to fan windings via gate timing delay. Use Value: 35mA max holding current ensures stable conduction down to low fan speeds without dropout, even at elevated ambient temperatures. | Use Scenario: Mains-powered dimming of halogen or LED drivers in commercial lighting fixtures. IC Role / Device Role / Timing Role: Primary AC switching device in trailing-edge or hybrid dimmer circuits interfacing with 0–10V or DALI controllers. Use Value: 300V/µs dV/dt immunity prevents false triggering from fast-switching LED driver harmonics, improving system reliability over 10,000+ operating hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TRIAC switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BTA08-800CW | Same 8A/800V rating but 35mA max IGT; higher Rth(j-c) = 3.5°C/W | Slightly reduced gate drive sensitivity; requires stronger gate driver for marginal trigger margin | Preferred where legacy BTA footprint compatibility is required and gate drive headroom exists |
| MAC8Q8Y | 8A/800V, 25mA max IGT, TO-220AB package; lower dV/dt (200V/µs) | Reduced noise immunity in high-dI/dt environments; not UL-recognized | Selected when cost is prioritized over safety certification and EMI robustness |
Compared with BTA08-800CW and MAC8Q8Y, the T820-800W offers superior commutation robustness (300V/µs dV/dt), UL recognition, and tighter gate sensitivity (20mA), making it optimal for safety-critical, high-noise appliance motor controls where long-term reliability is mandatory.
Availability
T820-800W is available at Aetrix Electronics and suitable for washing machine motor control, induction cooktop power stages, AC fan speed regulation, and industrial lighting dimmers requiring stable component supply and long-lifecycle support.
Supply support for T820-800W 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, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The T820W series belongs to ST's Snubberless™ TRIAC product line, engineered specifically for reliable, snubber-free AC switching in inductive home appliance loads-prioritizing commutation robustness, safety certification, and thermal efficiency.
FAQ
What is the maximum gate trigger current (IGT) specification for T820-800W?
The maximum gate trigger current (IGT) is 20 mA at 25°C, tested across quadrants I, II, and III with VD = 12 V and RL = 33 Ω. This value is guaranteed over the full operating junction temperature range (-40°C to +125°C), with typical IGT decreasing as temperature rises-enabling consistent turn-on with standard microcontroller GPIO or optocoupler drivers.
Does T820-800W require an external snubber circuit?
No. The T820-800W is explicitly designed as a Snubberless™ TRIAC, featuring enhanced commutation performance that eliminates the need for external RC snubber networks-even when driving highly inductive loads like universal motors. Its 300 V/µs dV/dt rating and 50 A/µs dI/dt tolerance ensure stable operation without snubbers under rated conditions.
What is the thermal resistance from junction to case (Rth(j-c))?
The junction-to-case thermal resistance (Rth(j-c)) is 3.1 °C/W under AC conditions, measured with the metal tab mounted to a heatsink using the recommended torque of 0.55 m·N. This value enables calculation of maximum allowable case temperature (Tc) for 8A RMS operation: Tj ≤ 125°C → Tc ≤ 100°C, assuming 25°C ambient and adequate heatsinking.
Is T820-800W certified to UL standards?
Yes. The T820-800W complies with UL Standard E81734 and carries UL recognition. This certification validates its construction, insulation, and safe operation in end-equipment-reducing time and cost for final product safety approvals in North American appliance markets.
T820-800W Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Snubberless™
- Package/Case:
- ISOWATT220AB-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Triac Type:
- Alternistor - Snubberless
- Voltage - Off State:
- 800 V
- Current - On State (It (RMS)) (Max):
- 8 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 100A, 105A
- Current - Gate Trigger (Igt) (Max):
- 20 mA
- Current - Hold (Ih) (Max):
- 35 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ISOWATT220AB
T820-800W FAQ
1.How can I place an order for T820-800W through Aetrix?
Please submit a Request for Quotation (RFQ) for T820-800W 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 T820-800W reliable?
The price and inventory of T820-800W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T820-800W is usually 5 days.
3.What payment methods are accepted for T820-800W?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T820-800W transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T820-800W?
T820-800W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T820-800W 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 T820-800W?
For technical support, including T820-800W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T820-800W requirements.
6.How does Aetrix verify that T820-800W is sourced from the original manufacturer or authorized distributors?
All T820-800W 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 T820-800W meets industry standards.
7.What is the process for return or replacement of T820-800W?
All T820-800W units undergo pre-shipment inspection (PSI). If there is an issue with T820-800W, 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 T820-800W part is unused and in its original packaging.
Return procedure for T820-800W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T820-800W Tags
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Z0103NN5AA4
STMicroelectronics
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