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STMicroelectronics T1210T-6I
- Part No.:
- T1210T-6I
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
T1210T-6I.pdf
- Description:
- TRIAC SENS GATE 600V 12A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:76
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Product details
Overview
T1210T-6I from STMicroelectronics is a logic-level, snubberless 12 A, 600 V RMS triac in TO-220AB insulated package, designed for AC line switching with high commutation robustness and low gate trigger current (10 mA). It supports phase-angle and on/off control in motor-driven power tools, lighting dimmers, and inrush-limiting circuits where thermal resistance (2.6 °C/W) and isolation (2500 Vrms) are critical.
For engineers reviewing the T1210T-6I datasheet, T1210T-6I pinout, T1210T-6I application, or T1210T-6I equivalent, key selection criteria include verified 3-quadrant logic-level triggering, dV/dt immunity ≥100 V/µs at 125 °C, I²t rating of 54 A²s, and RoHS-compliant insulated packaging suitable for safety-critical AC load interfaces.
Technical Context
The T1210T-6I operates as a bidirectional thyristor switch with 3-quadrant logic-level gate sensitivity (IGT = 10 mA max), enabling direct drive from microcontrollers without buffer stages. Its Snubberless™ architecture eliminates external RC snubbers by sustaining ≥100 V/µs dV/dt at 125 °C and supporting non-repetitive surge currents up to 90 A (50 Hz).
Thermal performance is defined by Rth(j-c) = 2.6 °C/W and junction temperature range of −40 to +125 °C, allowing full 12 A RMS conduction at case temperatures ≤88 °C. The device uses clip-bonding to reduce thermal resistance and improve reliability in cyclic thermal stress environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 12 A - Sustains continuous AC load current at Tc ≤ 88 °C without derating |
| VDRM / VRRM | 600 V - Blocks 600 V peak off-state voltage in both directions, enabling 240 V AC mains use |
| IGT (Q1–Q3) | 10 mA max - Logic-level gate drive compatible with 3.3 V/5 V MCU GPIOs |
| dV/dt (min) | 100 V/µs at 125 °C - Resists false triggering during fast transients without snubber |
| Rth(j-c) | 2.6 °C/W - Enables efficient heatsinking; 12 A operation requires ≤31.2 W case-to-ambient ΔT |
| Isolation Voltage | 2500 Vrms - Meets reinforced insulation requirements for Class I appliances |
| I²t (fusing) | 54 A²s - Quantifies single-pulse surge withstand capability for inrush protection design |
Pinout & Package
Package: TO-220AB insulated (UL E81734 certified, epoxy UL94 V0, lead-free, 2.3 g unit weight).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Anode 1 - Primary current path terminal; referenced to A2 for quadrant-sensitive triggering |
| A2 (MT2) | Main Terminal 2 | Anode 2 - Second main current path; polarity relative to A1 defines conduction quadrant |
| G | Gate | Trigger input - Accepts 10 mA logic-level pulse to initiate conduction in Q1, Q2, or Q3 |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless™ operation | Eliminates external RC snubber components by sustaining ≥100 V/µs dV/dt at 125 °C |
| Logic-level gate drive | 10 mA max IGT enables direct interface with 3.3 V/5 V microcontrollers and logic ICs |
| High commutation robustness | Supports 90 A non-repetitive surge (50 Hz, 20 ms) and 54 A²s I²t rating for inrush handling |
| Insulated TO-220AB package | 2500 Vrms isolation meets reinforced insulation standards for consumer appliance safety |
| Low thermal resistance | 2.6 °C/W junction-to-case enables compact heatsink designs for 12 A continuous operation |
Applications
| Power Tool Motor Control | Dimmable LED/Lighting Driver |
|---|---|
|
Use Scenario: Variable-speed control of universal motors in corded drills and sanders using phase-angle firing. IC Role / Device Role / Timing Role: Bidirectional AC switch triggered by zero-crossing synchronized gate pulses to regulate average power. Use Value: 12 A RMS rating and 90 A surge capacity handle motor startup inrush; Snubberless™ operation reduces BOM count and PCB area. |
Use Scenario: Leading-edge dimming of resistive and capacitive LED drivers in residential lighting fixtures. IC Role / Device Role / Timing Role: AC line switch modulating conduction angle per TRIAC phase-control waveform. Use Value: 10 mA logic-level IGT allows direct MCU timing control; 600 V blocking supports 230 V AC mains globally. |
| Inrush Current Limiter | Overvoltage Crowbar Protection |
|
Use Scenario: Soft-start circuit limiting inrush into transformer-based power supplies or heating elements. IC Role / Device Role / Timing Role: Delayed turn-on via controlled gate timing to ramp current over multiple AC cycles. Use Value: 54 A²s I²t rating ensures survivability during repeated cold-start surges without degradation. |
Use Scenario: Fast-acting crowbar across DC bus or AC line during overvoltage events (e.g., lightning-induced spikes). IC Role / Device Role / Timing Role: Triggered latch-on device shorting faulted line to ground when overvoltage threshold is exceeded. Use Value: High dV/dt immunity (100 V/µs) prevents spurious triggering; 2500 Vrms isolation protects control-side circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BT139-600E | Standard 16 A triac, 600 V, IGT = 35 mA, non-snubberless, TO-220 non-insulated | Requires external snubber; lacks 2500 Vrms isolation; higher gate drive burden | Select when cost priority outweighs isolation/space constraints and snubber design is acceptable |
| T1235T-6I | Same package and voltage, but 35 mA IGT, higher dV/dt (2000 V/µs), Snubberless™ | Better noise immunity in EMI-heavy environments; not logic-level compatible | Select for industrial motor drives with noisy gate signals where 10 mA drive is unavailable |
Compared with BT139-600E, T1210T-6I offers logic-level drive and integrated isolation, reducing system complexity; versus T1235T-6I, it trades higher dV/dt immunity for lower gate current, enabling direct MCU interfacing without level-shifting.
Availability
T1210T-6I is available at Aetrix Electronics and suitable for motor control in power tools, dimmable lighting systems, and inrush current limiting circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant insulated packaging.
Supply support for T1210T-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, specializing in power discrete devices, analog ICs, and microcontrollers for industrial, automotive, and consumer markets.
The T12T series was developed specifically for cost-sensitive, high-reliability AC switching in white goods and power tools-emphasizing snubberless operation, logic-level compatibility, and reinforced insulation in standard through-hole packages.
FAQ
What is the maximum junction temperature for continuous operation?
The T1210T-6I has an operating junction temperature range of −40 to +125 °C. Continuous conduction at full 12 A RMS requires case temperature ≤88 °C, as specified in absolute maximum ratings. Exceeding 125 °C risks irreversible parametric shift and latch-up failure.
Does T1210T-6I require a heat sink in all applications?
A heat sink is required whenever power dissipation exceeds what ambient convection can remove. At 12 A RMS and typical on-state voltage (1.55 V), conduction loss is ~18.6 W; with Rth(j-a) = 60 °C/W, ambient alone would cause >1100 °C rise-so a heatsink is mandatory for any sustained load above ~1 A.
Can T1210T-6I be used in 4-quadrant triggering configurations?
No. T1210T-6I is a 3-quadrant logic-level triac (IGT specified only for Q1, Q2, Q3). Quadrant IV triggering is not characterized or guaranteed; attempting it may result in inconsistent turn-on or elevated IGT requirements beyond 10 mA.
Is the TO-220AB insulated package UL-certified?
Yes. The T1210T-6I's TO-220AB insulated package is UL certified under file E81734, providing 2500 Vrms isolation and meeting UL94 V0 flammability requirements-critical for Class I appliance safety compliance.
T1210T-6I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Logic - Sensitive Gate
- Voltage - Off State:
- 600 V
- Current - On State (It (RMS)) (Max):
- 12 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 90A, 95A
- Current - Gate Trigger (Igt) (Max):
- 10 mA
- Current - Hold (Ih) (Max):
- 10 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
T1210T-6I FAQ
1.How can I place an order for T1210T-6I through Aetrix?
Please submit a Request for Quotation (RFQ) for T1210T-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 T1210T-6I reliable?
The price and inventory of T1210T-6I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T1210T-6I is usually 5 days.
3.What payment methods are accepted for T1210T-6I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T1210T-6I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T1210T-6I?
T1210T-6I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T1210T-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 T1210T-6I?
For technical support, including T1210T-6I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T1210T-6I requirements.
6.How does Aetrix verify that T1210T-6I is sourced from the original manufacturer or authorized distributors?
All T1210T-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 T1210T-6I meets industry standards.
7.What is the process for return or replacement of T1210T-6I?
All T1210T-6I units undergo pre-shipment inspection (PSI). If there is an issue with T1210T-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 T1210T-6I part is unused and in its original packaging.
Return procedure for T1210T-6I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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