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STMicroelectronics T1635T-8G-TR
- Part No.:
- T1635T-8G-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
T1635T-8G-TR.pdf
- Description:
- TRIAC ALTERNISTOR 800V 16A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,060
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Product details
Overview
T1635T-8G-TR from STMicroelectronics is a Snubberless™ Triac in D²PAK package rated for 16 A RMS on-state current, 800 V repetitive peak off-state voltage (VDRM/VRRM), and 35 mA gate trigger current (IGT), designed for high-commutation AC switching in motor control, heating, lighting, and crowbar protection circuits.
For engineers reviewing the T1635T-8G-TR datasheet, T1635T-8G-TR pinout, T1635T-8G-TR application, or T1635T-8G-TR equivalent, key selection criteria include dV/dt immunity (≥1000 V/µs at 150 °C), (dl/dt)c capability (≥12 A/ms at 150 °C), junction temperature range (–40 to +150 °C), and snubberless operation under defined limits.
Technical Context
This three-quadrant Triac supports phase-angle and zero-crossing AC control without external snubbers when operated within its specified dV/dt and (dl/dt)c limits. Its design enables reliable turn-on at low gate drive (35 mA max) and stable holding/latching (IL ≤ 65 mA, IH ≤ 45 mA) across –40 to +150 °C junction temperature.
The device features a non-insulated D²PAK tab with Rth(j-c) = 1.15 °C/W, enabling efficient heat transfer to heatsinks. Its 900 V non-repetitive surge rating (VDSM/VRSM) and 126 A ITSM (16.7 ms) support robust inrush and fault handling in line-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 16 A - Sustained AC load current handling at Tc = 125.9 °C |
| VDRM / VRRM | 800 V @ Tj = 125 °C - Blocking voltage for 50–60 Hz AC line applications |
| IGT | 35 mA max - Gate current required to trigger conduction in all three quadrants |
| (dl/dt)c | 12 A/ms min @ Tj = 150 °C - Critical rate of current decrease ensuring reliable commutation without snubber |
| dV/dt | 1000 V/µs min @ Tj = 150 °C - Immunity to false turn-on during fast voltage transients |
| Rth(j-c) | 1.15 °C/W max - Thermal resistance from junction to case, enabling direct heatsink mounting |
| Tj Range | –40 to +150 °C - Extended operating junction temperature for high-ambient industrial environments |
Pinout & Package
D²PAK (TO-263) package with non-insulated metal tab (A2), RoHS- and halogen-free Ecopack®2 compliance, UL 94 V0 flammability rating, and 1.6 g unit weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | Main current terminal; referenced polarity for gate triggering and blocking voltage definition |
| A2 | Anode 2 | Main current terminal; non-insulated tab used for mechanical mounting and thermal conduction |
| G | Gate | Control input; triggers conduction in Quadrants I, II, and III with ≤35 mA pulse |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless operation | Validated for phase-control without RC snubber when dV/dt and (dl/dt)c limits are respected |
| High-temperature commutation | (dl/dt)c ≥ 12 A/ms at 150 °C ensures reliable turn-off in hot environments |
| Enhanced dV/dt immunity | ≥1000 V/µs at 150 °C prevents false triggering during line transients |
| Three-quadrant triggering | Operates in Quadrants I, II, and III-enabling simplified gate drive in bidirectional AC circuits |
| Thermal margin extension | Rated up to 150 °C junction temperature with derated VDRM/VRRM (600 V) for sustained reliability |
Applications
| Motor Control | Heating Control |
|---|---|
Use Scenario: Speed and direction control of universal motors in power tools and HVAC blowers using phase-angle dimming. IC Role / Device Role / Timing Role: Main AC power switch triggered by zero-crossing or phase-shifted gate pulses. Use Value: Eliminates snubber components while maintaining commutation stability at elevated ambient temperatures (>85 °C). |
Use Scenario: On/off and power-level regulation of resistive heating elements in ovens, water heaters, and soldering stations. IC Role / Device Role / Timing Role: High-current AC load switch with precise phase-angle control for thermal output tuning. Use Value: Supports 16 A RMS continuous current with 1.15 °C/W thermal resistance for compact heatsink integration. |
| Lighting Dimming | Overvoltage Crowbar |
Use Scenario: Leading-edge dimming of incandescent and halogen lamps in residential and commercial fixtures. IC Role / Device Role / Timing Role: Bidirectional AC switch synchronized to line zero-crossing for smooth brightness adjustment. Use Value: Three-quadrant operation enables consistent triggering across full AC cycle without auxiliary circuitry. |
Use Scenario: Fast-acting overvoltage protection in DC power supplies and AC line inputs by shorting fault conditions. IC Role / Device Role / Timing Role: Crowbar element triggered by voltage-sensing comparator to clamp excessive bus voltage. Use Value: 900 V non-repetitive surge rating (VDSM/VRSM) withstands transient overvoltages before clamping action. |
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 |
|---|---|---|---|
| BTA16-800BWRG | 16 A/800 V Triac in TO-220 insulated package; lower dV/dt (600 V/µs typ.) and no (dl/dt)c spec | Requires snubber in high-dV/dt environments; limited to ≤125 °C Tj | Select when insulation is mandatory and thermal performance requirements are less stringent |
| BTB16-800CW | 16 A/800 V Triac in TO-220 non-insulated package; rated for 125 °C Tj only; no snubberless validation | Lacks documented snubberless operation and high-temperature (dl/dt)c data | Choose where cost is prioritized over extended thermal margin and verified commutation robustness |
Compared with BTA16-800BWRG and BTB16-800CW, the T1635T-8G-TR delivers higher thermal margin (150 °C), quantified snubberless operation, and validated (dl/dt)c performance at elevated temperature-making it preferable for compact, high-reliability AC control designs.
Availability
T1635T-8G-TR is available at Aetrix Electronics and suitable for motor control, heating regulation, and overvoltage crowbar protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for T1635T-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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The T1635T-8G-TR belongs to ST's Snubberless™ Triac product line, engineered specifically for high-reliability, snubber-free AC power control in thermally demanding industrial and appliance applications.
FAQ
Is the T1635T-8G-TR truly snubberless, and under what conditions?
Yes-the T1635T-8G-TR is validated for snubberless operation per ST's DS12734, provided dV/dt remains ≤1000 V/µs at 150 °C and (dl/dt)c stays within ≥12 A/ms limits. It must be mounted on an adequate heatsink (Rth(j-c) = 1.15 °C/W) and operated within specified IT(RMS) and Tj boundaries.
What is the maximum allowable case temperature for continuous 16 A operation?
The datasheet specifies IT(RMS) = 16 A at Tc = 125.9 °C (Figure 2). Exceeding this case temperature requires derating: at Tc = 135 °C, IT(RMS) drops to ~14.5 A; at Tc = 145 °C, it falls to ~12 A. Thermal design must ensure Tc ≤ 125.9 °C for full-rated current.
Can the T1635T-8G-TR be used in DC applications?
No-it is a bidirectional AC switch (Triac) that latches only during alternating polarity. In DC, it conducts once triggered but cannot commutate off without current interruption. For DC switching, use a MOSFET or IGBT instead.
How does the non-insulated D²PAK tab affect PCB layout and safety compliance?
The A2 tab is electrically connected to Anode 2 and must be isolated from other conductive layers unless intentionally tied to the same potential. Clearance and creepage distances must comply with IEC 60950/62368 for the system's working voltage, especially in mains-connected designs.
T1635T-8G-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Snubberless™
- 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):
- 16 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 120A, 126A
- Current - Gate Trigger (Igt) (Max):
- 35 mA
- Current - Hold (Ih) (Max):
- 45 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
T1635T-8G-TR FAQ
1.How can I place an order for T1635T-8G-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for T1635T-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 T1635T-8G-TR reliable?
The price and inventory of T1635T-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 T1635T-8G-TR is usually 5 days.
3.What payment methods are accepted for T1635T-8G-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T1635T-8G-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T1635T-8G-TR?
T1635T-8G-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T1635T-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 T1635T-8G-TR?
For technical support, including T1635T-8G-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T1635T-8G-TR requirements.
6.How does Aetrix verify that T1635T-8G-TR is sourced from the original manufacturer or authorized distributors?
All T1635T-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 T1635T-8G-TR meets industry standards.
7.What is the process for return or replacement of T1635T-8G-TR?
All T1635T-8G-TR units undergo pre-shipment inspection (PSI). If there is an issue with T1635T-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 T1635T-8G-TR part is unused and in its original packaging.
Return procedure for T1635T-8G-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T1635T-8G-TR Tags
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Z0103NN5AA4
STMicroelectronics
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Littelfuse Inc.
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Z0103MNT1G
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