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STMicroelectronics TYN812TRG
- Part No.:
- TYN812TRG
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-220-3
- Datasheet:
-
TYN812TRG.pdf
- Description:
- SCR 800V 12A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:875
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Product details
Overview
TYN812TRG from STMicroelectronics is a standard 12 A, 800 V repetitive peak off-state voltage (VDRM/VRRM) silicon-controlled rectifier (SCR) in TO-220AB package with 5 mA gate trigger current (IGT), designed for phase-controlled AC power switching in motor control, overvoltage crowbar protection, and capacitive discharge ignition circuits.
For engineers reviewing the TYN812TRG datasheet, TYN812TRG pinout, TYN812TRG application, or TYN812TRG equivalent, key selection criteria include RMS on-state current rating (12 A), low IGT (5 mA), thermal resistance (1.3 °C/W junction-to-case), and compatibility with snubberless operation in 50/60 Hz line-powered systems.
Technical Context
This SCR operates as a unidirectional latching switch triggered by a positive gate pulse relative to cathode, sustaining conduction until anode current falls below holding current (IH ≤ 30 mA). It features a critical dV/dt rating of 200 V/µs at 125 °C with gate open, enabling robust noise immunity in industrial AC environments.
Its on-state characteristics are defined by threshold voltage (Vto ≤ 0.85 V at 125 °C) and dynamic resistance (Rd ≤ 30 mΩ), ensuring low conduction losses at rated IT(RMS) = 12 A and case temperature up to 110 °C. The device supports non-repetitive surge current up to 140 A (10 ms, 25 °C initial junction temperature).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 12 A - Sustained RMS on-state current at Tc = 110 °C, defining continuous power-handling capability in heat-sinked applications. |
| VDRM / VRRM | 800 V - Maximum repetitive peak off-state voltage in both forward and reverse directions, suitable for 230 VAC mains with safety margin. |
| IGT | 5 mA - Gate trigger current required at VD = 12 V and RL = 33 Ω, enabling direct drive from low-power logic or microcontroller GPIO via series resistor. |
| IH | ≤30 mA - Holding current maximum at Tj = 25 °C, determining minimum load current needed to maintain conduction after triggering. |
| dV/dt | 200 V/µs - Minimum critical rate of rise of off-state voltage before spurious turn-on, supporting reliable operation without snubber in clean AC waveforms. |
| Rth(j-c) | 1.3 °C/W - Junction-to-case thermal resistance, enabling calculation of maximum allowable power dissipation (Pmax ≈ (Tjmax − Tc)/Rth(j-c)) for heatsink design. |
| VTM | ≤1.6 V - Peak on-state voltage at ITM = 24 A and tp = 380 µs, directly impacting conduction loss and thermal stress under surge conditions. |
Pinout & Package
TYN812TRG is housed in a TO-220AB package with insulated mounting tab (plastic body, no electrical isolation between tab and cathode), requiring mechanical fastening torque of 0.4–0.6 N·m. The tab is electrically connected to the cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Main current entry path during forward conduction | Connected to AC line or high-side load; must withstand full VDRM and carry full IT(RMS); polarity-sensitive in bridge configurations. |
| Cathode (K) | Main current exit path and reference for gate signal | Electrically tied to mounting tab; serves as common return for load and gate drive; requires low-impedance connection to ground or neutral. |
| Gate (G) | Control input for triggering conduction | Receives positive pulse relative to cathode; sensitive to ESD and dv/dt; requires current-limited drive (e.g., 100–470 Ω series resistor from MCU). |
Key Features
| Feature | Design Value |
|---|---|
| Low gate trigger current | IGT = 5 mA enables direct interface with 3.3 V/5 V microcontrollers without external amplification. |
| High dV/dt immunity | 200 V/µs rating minimizes need for snubber networks in 50/60 Hz AC phase-control applications. |
| Robust surge capability | 140 A non-repetitive surge current (10 ms) supports motor startup and capacitor charging transients. |
| Thermally efficient package | TO-220AB with Rth(j-c) = 1.3 °C/W allows >10 W continuous dissipation with modest heatsinking. |
| Lead-free and halogen-free | ECOPACK®-compliant construction meets RoHS and JEDEC J-STD-020 reflow requirements. |
Applications
| Power Tool Motor Control | Overvoltage Crowbar Protection |
|---|---|
|
Use Scenario: Phase-angle controlled speed regulation in corded drills and saws using triac/SCR-based AC motor drives. IC Role / Device Role / Timing Role: Main power switching element triggered synchronously with AC zero-crossing to modulate average motor voltage. Use Value: 12 A IT(RMS) and 800 V VDRM support universal 100–240 VAC input; 5 mA IGT simplifies gate driver design with optocoupler-isolated MCU outputs. |
Use Scenario: Fast-acting short-circuit protection in DC power supplies where excessive output voltage triggers immediate SCR latch-up to blow fuse. IC Role / Device Role / Timing Role: Latching crowbar switch activated by comparator-driven gate pulse upon overvoltage detection. Use Value: Low IH (≤30 mA) ensures reliable latching even with weak sense signals; high dV/dt immunity prevents false triggering from supply transients. |
| Capacitive Discharge Ignition (CDI) | Inrush Current Limiting |
|
Use Scenario: High-energy spark generation in small engine ignition systems using charged capacitor discharge through primary coil. IC Role / Device Role / Timing Role: High-speed switch releasing stored capacitor energy into ignition coil primary winding at precise crank angle. Use Value: 140 A surge rating handles 10–20 ms capacitor discharge pulses; low VTM (≤1.6 V) minimizes energy loss during conduction. |
Use Scenario: Controlled turn-on of large input capacitors in industrial SMPS or battery chargers to limit cold-start inrush. IC Role / Device Role / Timing Role: Series-connected SCR bypassed after soft-start delay to reduce resistive losses during steady-state operation. Use Value: 12 A RMS rating supports sustained pre-charge currents up to 10 A; TO-220AB package allows direct heatsink mounting for thermal reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TYN812RG | Same die, but 15 mA IGT and tube packaging (no tape-and-reel). | Requires higher gate drive strength; less suitable for low-power MCU direct drive. | Select when gate drive circuitry already delivers ≥15 mA and reel packaging is not required. |
| BT139-800 | 16 A IT(RMS), same 800 V VDRM, but 10 mA IGT and TO-220 non-insulated package. | Higher current headroom but larger footprint; tab is anode, not cathode - changes PCB layout and isolation strategy. | Choose for higher current margin or when anode-tab topology better suits heatsink grounding scheme. |
Compared with TYN812RG and BT139-800, TYN812TRG offers optimal balance of low gate drive demand (5 mA), standardized TO-220AB cathode-tab configuration, and tape-and-reel availability for automated assembly-making it preferred for cost-sensitive, high-volume motor control modules.
Availability
TYN812TRG is available at Aetrix Electronics and suitable for motor control, overvoltage protection, and capacitive discharge ignition applications requiring stable component supply across industrial production cycles.
Supply support for TYN812TRG 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, microcontrollers, sensors, and automotive ICs.
TYN812TRG belongs to ST's standard SCR product line engineered for rugged, cost-effective AC power control in appliances, power tools, and industrial equipment-emphasizing manufacturability, thermal robustness, and gate sensitivity.
FAQ
What is the maximum junction temperature for continuous operation?
The TYN812TRG has an operating junction temperature range of –40 °C to +125 °C. For continuous conduction, thermal design must ensure Tj does not exceed 125 °C under worst-case ambient and power dissipation conditions, using Rth(j-c) = 1.3 °C/W and appropriate heatsinking.
Can TYN812TRG be used without a snubber circuit?
Yes-its 200 V/µs dV/dt rating at 125 °C allows snubberless operation in clean 50/60 Hz AC waveforms with moderate inductive loads. However, snubbers remain recommended for highly inductive loads or noisy line environments to prevent false triggering.
Is the TO-220AB tab electrically isolated?
No-the TO-220AB package used in TYN812TRG has a non-insulated tab that is internally connected to the cathode. Electrical isolation requires insulating hardware (e.g., shoulder washers, mica pads) if the heatsink is grounded or at a different potential.
What is the typical gate-cathode impedance for reliable triggering?
A series gate resistor of 100–330 Ω is typical when driving from a 5 V logic source, limiting peak gate current to ~15–50 mA while ensuring IGT ≥ 5 mA is met. Lower resistance improves noise immunity but increases gate power dissipation during repeated triggering.
TYN812TRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Off State:
- 800 V
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Gate Trigger (Igt) (Max):
- 5 mA
- Voltage - On State (Vtm) (Max):
- 1.6 V
- Current - On State (It (AV)) (Max):
- 8 A
- Current - On State (It (RMS)) (Max):
- 12 A
- Current - Hold (Ih) (Max):
- 15 mA
- Current - Off State (Max):
- 5 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 140A, 145A
- SCR Type:
- Standard Recovery
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
TYN812TRG FAQ
1.How can I place an order for TYN812TRG through Aetrix?
Please submit a Request for Quotation (RFQ) for TYN812TRG 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 TYN812TRG reliable?
The price and inventory of TYN812TRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TYN812TRG is usually 5 days.
3.What payment methods are accepted for TYN812TRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TYN812TRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TYN812TRG?
TYN812TRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TYN812TRG 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 TYN812TRG?
For technical support, including TYN812TRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TYN812TRG requirements.
6.How does Aetrix verify that TYN812TRG is sourced from the original manufacturer or authorized distributors?
All TYN812TRG 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 TYN812TRG meets industry standards.
7.What is the process for return or replacement of TYN812TRG?
All TYN812TRG units undergo pre-shipment inspection (PSI). If there is an issue with TYN812TRG, 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 TYN812TRG part is unused and in its original packaging.
Return procedure for TYN812TRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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