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STMicroelectronics T1250-600G-TR
- Part No.:
- T1250-600G-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
T1250-600G-TR.pdf
- Description:
- TRIAC ALTERNISTOR 600V 12A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:2,479
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Product details
Overview
T1250-600G-TR from STMicroelectronics is a Snubberless™ 3-quadrant logic-level triac in D²PAK package, rated for 12 A RMS on-state current and 600 V repetitive peak off-state voltage, with 50 mA gate trigger current (IGT), designed for phase-controlled AC switching in inductive loads such as appliance motor speed controllers and industrial heating systems.
For engineers reviewing the T1250-600G-TR datasheet, T1250-600G-TR pinout, T1250-600G-TR application, or T1250-600G-TR equivalent, key selection criteria include commutation robustness (dV/dt = 1000 V/µs, (dl/dt)c = 12 A/ms), insulated thermal performance (Rth(j-c) = 1.4 °C/W), and UL1557-certified isolation (2500 VRMS tab rating).
Technical Context
This triac operates in three quadrants (I, II, III) with no gate sensitivity in quadrant IV, enabling reliable triggering under asymmetric AC waveforms. Its Snubberless™ architecture eliminates external snubber networks when driving inductive loads like universal motors or solenoids.
It features an internal ceramic insulation pad delivering 2500 VRMS isolation between the tab and MT1/MT2 terminals, compliant with UL file E81734, and supports logic-level drive via low IGT (50 mA max) while maintaining high dV/dt immunity (1000 V/µs at Tj = 125 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 12 A - Sustains continuous mains-frequency AC load current up to 12 A with case temperature ≤105 °C in D²PAK package. |
| VDRM / VRRM | 600 V - Blocks up to 600 V peak reverse or off-state voltage without conduction, suitable for 230 VAC mains applications. |
| IGT (max) | 50 mA - Gate trigger current threshold enabling direct drive from microcontroller GPIO or low-power optocouplers. |
| dV/dt (min) | 1000 V/µs - Immune to rapid voltage transients during zero-crossing switching, eliminating need for snubber circuits with inductive loads. |
| (dl/dt)c (min) | 12 A/ms - Critical rate of current decrease ensuring reliable commutation in 3Q operation with highly inductive loads like fan motors. |
| Rth(j-c) | 1.4 °C/W - Junction-to-case thermal resistance allows efficient heat transfer to heatsink, supporting full 12 A rating at Tc ≤105 °C. |
| Isolation Voltage | 2500 VRMS - Reinforced insulation between metal tab and main terminals meets UL1557 safety requirements for Class I appliances. |
Pinout & Package
D²PAK (TO-263) surface-mount package with isolated metal tab (pin 3), 3-terminal configuration, RoHS-compliant lead-free finish, halogen-free molding compound, and UL94-V0 epoxy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MT1 (Pin 1) | Main Terminal 1 | Anode-side current path; referenced to gate for triggering in quadrants I and III. |
| MT2 (Pin 2) | Main Terminal 2 | Cathode-side current path; common return for load current and gate reference in standard configurations. |
| Tab (Pin 3) | Insulated Anode / Heat Sink Interface | Electrically isolated metal tab rated 2500 VRMS; serves as primary thermal interface to heatsink without requiring insulating hardware. |
| G (Pin 4) | Gate | Control input; triggers conduction when ≥50 mA pulse applied between G and MT1 with proper polarity per quadrant. |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless™ 3Q operation | Enables direct drive of inductive loads (e.g., universal motors) without external RC snubbers, reducing BOM count and board space. |
| UL1557-certified insulation | 2500 VRMS reinforced isolation meets safety standards for double-insulated consumer appliances and industrial controls. |
| Logic-level gate drive | 50 mA max IGT allows direct interfacing with 3.3 V/5 V MCUs or low-current optocouplers (e.g., MOC302x series) without buffer stages. |
| High commutation robustness | 1000 V/µs dV/dt and 12 A/ms (dl/dt)c ensure reliable turn-off under worst-case inductive flyback conditions at 125 °C junction temperature. |
| Thermally optimized D²PAK | 1.4 °C/W Rth(j-c) enables full 12 A RMS current handling with compact heatsinking-critical for space-constrained motor control modules. |
Applications
| Appliance Motor Speed Control | Industrial Heating Regulation |
|---|---|
|
Use Scenario: Variable-speed control of universal motors in vacuum cleaners, power tools, and blenders using phase-angle modulation. IC Role / Device Role / Timing Role: Main AC power switch executing precise half-cycle conduction timing based on MCU-generated zero-crossing synchronized gate pulses. Use Value: Eliminates snubber components and reduces thermal derating vs. standard triacs-enabling smaller heatsinks and higher power density in portable appliances. |
Use Scenario: Closed-loop temperature regulation in electric ovens, soldering stations, and HVAC duct heaters using PID-controlled AC power cycling. IC Role / Device Role / Timing Role: High-reliability ON/OFF switching element activated by SSR driver ICs or microcontroller outputs to deliver precise RMS power to resistive heating elements. Use Value: 2500 VRMS isolation ensures compliance with IEC 60335-1 safety requirements while sustaining 12 A continuous current without thermal shutdown. |
| Light Dimmer for Incandescent/Halogen | Static Relay Replacement |
|
Use Scenario: Leading-edge dimming of incandescent and halogen lamps in residential and commercial lighting systems. IC Role / Device Role / Timing Role: Phase-controlled AC switch triggered after programmable delay from zero-crossing detection to adjust lamp brightness. Use Value: 1000 V/µs dV/dt immunity prevents false triggering from line noise, ensuring flicker-free dimming even with long cable runs and EMI-prone environments. |
Use Scenario: Solid-state replacement for electromechanical relays in PLC output modules, CNC machine tool controls, and test equipment sequencing. IC Role / Device Role / Timing Role: Fail-safe, contactless AC power switching device controlled by digital logic signals to isolate control and load circuits. Use Value: UL1557 certification and 12 A RMS rating support direct integration into safety-rated industrial control panels without additional isolation barriers. |
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 |
|---|---|---|---|
| BTA12-600BW | TO-220AB insulated package; identical electrical specs (12 A, 600 V, 50 mA IGT, 1000 V/µs dV/dt), but Rth(j-c) = 2.3 °C/W vs. 1.4 °C/W. | Requires larger heatsink for same 12 A load due to higher thermal resistance; better suited for through-hole assembly and manual serviceability. | Select when mechanical mounting constraints favor TO-220AB or when field-replaceability is prioritized over thermal density. |
| T1235-600G-TR | D²PAK package with 35 mA IGT (vs. 50 mA); otherwise identical voltage/current ratings and Snubberless™ 3Q performance. | Lower gate drive requirement suits ultra-low-power controllers or battery-operated dimmers where gate current budget is <40 mA. | Select when gate drive capability is limited or when optimizing for lowest possible trigger energy in energy-harvesting systems. |
Compared with BTA12-600BW, T1250-600G-TR delivers superior thermal performance in surface-mount form; compared with T1235-600G-TR, it trades slightly higher gate current for enhanced noise immunity and broader compatibility with legacy 50 mA optocoupler drivers.
Availability
T1250-600G-TR is available at Aetrix Electronics and suitable for appliance motor speed controllers, industrial heating regulation systems, and static relay replacements requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for T1250-600G-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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
This part belongs to the BTA/BTB/T12 Snubberless™ Triac product line, engineered specifically for robust, snubber-free AC power control in safety-critical and thermally demanding applications across home appliances and industrial automation.
FAQ
What is the maximum junction temperature for continuous operation?
The T1250-600G-TR has a specified operating junction temperature range of –40 °C to +125 °C. Continuous operation at 12 A RMS requires case temperature ≤105 °C in D²PAK package, verified by thermal derating curves in DS2115 Figure 2. Exceeding 125 °C risks irreversible parametric shift and latch-up failure.
Does this triac require a heatsink in all applications?
Yes-thermal data shows Rth(j-c) = 1.4 °C/W and Rth(j-a) ≈ 45 °C/W (S = 1 cm² copper). At 12 A RMS, power dissipation exceeds 2 W; without a heatsink, junction temperature would exceed 125 °C even at 25 °C ambient. A minimum 10 cm² aluminum heatsink is recommended for full-load operation.
Can T1250-600G-TR replace a standard 4Q triac in existing designs?
No-it is a 3Q-only device with no gate sensitivity in quadrant IV. Replacing a 4Q triac (e.g., BTB12-600B) requires verifying that the control circuit only triggers in quadrants I, II, or III. If quadrant IV triggering occurs, false turn-on or erratic behavior may result.
Is the metal tab electrically connected to any internal terminal?
No-the tab is fully insulated from MT1, MT2, and gate via an internal ceramic pad, rated for 2500 VRMS isolation. It serves exclusively as a thermal interface and must be connected to chassis ground or heatsink potential without electrical bias.
T1250-600G-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:
- 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):
- 120A, 126A
- Current - Gate Trigger (Igt) (Max):
- 50 mA
- Current - Hold (Ih) (Max):
- 50 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
T1250-600G-TR FAQ
1.How can I place an order for T1250-600G-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for T1250-600G-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 T1250-600G-TR reliable?
The price and inventory of T1250-600G-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T1250-600G-TR is usually 5 days.
3.What payment methods are accepted for T1250-600G-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T1250-600G-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T1250-600G-TR?
T1250-600G-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T1250-600G-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 T1250-600G-TR?
For technical support, including T1250-600G-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T1250-600G-TR requirements.
6.How does Aetrix verify that T1250-600G-TR is sourced from the original manufacturer or authorized distributors?
All T1250-600G-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 T1250-600G-TR meets industry standards.
7.What is the process for return or replacement of T1250-600G-TR?
All T1250-600G-TR units undergo pre-shipment inspection (PSI). If there is an issue with T1250-600G-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 T1250-600G-TR part is unused and in its original packaging.
Return procedure for T1250-600G-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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