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STMicroelectronics TYN812RG
- Part No.:
- TYN812RG
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-220-3
- Datasheet:
-
TYN812RG.pdf
- Description:
- SCR 800V 12A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:905
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Product details
Overview
TYN812RG 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 15 mA gate trigger current (IGT), designed for phase-controlled AC power switching in motor control, overvoltage crowbar protection, and inrush limiting circuits.
For engineers reviewing the TYN812RG datasheet, TYN812RG pinout, TYN812RG application, or TYN812RG equivalent, this device serves as a robust, through-hole thyristor for industrial-grade AC line control where reliable turn-on at defined gate thresholds and high surge immunity are required.
Technical Context
The TYN812RG operates as a unidirectional, four-layer p-n-p-n semiconductor switch requiring gate-triggered conduction and sustaining current to remain latched. Its 800 V VDRM/VRRM rating supports operation on 400 VAC RMS mains with safety margin, while its 115 A non-repetitive surge current (tp = 8.3 ms) enables robust handling of transient overloads.
Thermal performance is defined by Rth(j–c) = 1.3 °C/W (junction-to-case), enabling 12 A IT(RMS) at TC = 110 °C with appropriate heatsinking. Gate sensitivity is fixed at IGT ≤ 15 mA under VD = 12 V and RL = 33 Ω, ensuring compatibility with standard logic-level driver stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 12 A - Sustains continuous 12 A RMS load current at TC = 110 °C with adequate heatsink. |
| VDRM / VRRM | 800 V - Blocks up to 800 V peak reverse/forward off-state voltage, suitable for 400 VAC systems. |
| IGT | 15 mA max - Guaranteed turn-on with ≤15 mA DC gate current, compatible with microcontroller GPIO or discrete transistor drivers. |
| VTM | 1.6 V max - On-state voltage drop at 24 A pulse ensures low conduction loss and thermal stress during normal operation. |
| dV/dt | 200 V/µs min - Immune to false triggering from rapid voltage transients in noisy industrial environments. |
| IH | 15 mA max - Holding current threshold defines minimum load current needed to maintain conduction after gate signal removal. |
| Rth(j–c) | 1.3 °C/W - Enables thermal design with predictable junction temperature rise per watt dissipated at the case interface. |
Pinout & Package
TYN812RG uses the TO-220AB package: insulated plastic case with metal tab (anode-connected), three leads, and recommended mounting torque of 0.4–0.6 N·m. The tab is electrically connected to the anode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Tab) | Main current input path during conduction | Electrically bonded to metal tab; requires isolation washer if mounted to grounded heatsink. |
| Cathode (Lead 1) | Main current return path during conduction | Low-inductance output terminal; connects to load return or neutral side of AC circuit. |
| Gate (Lead 2) | Control input for turn-on initiation | Sensitive to ≤15 mA DC; must be driven with clean, short-duration pulse to avoid false triggering. |
Key Features
| Feature | Design Value |
|---|---|
| High surge capability | 115 A non-repetitive peak on-state current (tp = 8.3 ms) protects against motor startup surges and capacitor charging spikes. |
| Robust dV/dt immunity | 200 V/µs minimum critical rate-of-rise prevents spurious turn-on in EMI-heavy motor drive or SMPS environments. |
| Standardized TO-220AB footprint | Enables drop-in replacement in legacy designs using industry-standard through-hole heatsink mounting and layout. |
| ECOPACK® compliant packaging | Lead-free, halogen-free molding compound meets RoHS and JEDEC J-STD-020 reflow requirements. |
Applications
| Power Tool Motor Control | AC Input Crowbar Protection |
|---|---|
|
Use Scenario: Phase-angle controlled speed regulation in corded drills and saws operating from 230 VAC mains. IC Role / Device Role / Timing Role: Main AC power switch triggered synchronously with zero-crossing detection to modulate average motor voltage. Use Value: Delivers 12 A RMS current handling with 800 V blocking margin, enabling compact thermal design without derating at ambient temperatures up to 70 °C. |
Use Scenario: Fast-acting overvoltage shutdown in industrial power supplies when output exceeds safe threshold. IC Role / Device Role / Timing Role: Latched crowbar element that shorts output to ground upon fault detection via comparator-driven gate pulse. Use Value: 15 mA IGT ensures fast, deterministic turn-on from low-power comparators; 115 A surge rating absorbs energy from transient overvoltage events. |
| Inrush Current Limiting | Voltage Regulation Circuits |
|
Use Scenario: Controlled turn-on of large transformer or capacitor banks in test equipment and medical imaging systems. IC Role / Device Role / Timing Role: Series-connected SCR limiting peak inrush by delaying conduction until after initial surge decays. Use Value: 200 V/µs dV/dt immunity prevents false triggering during rapid bus voltage ramp-up; TO-220AB allows direct bolt-down heatsinking. |
Use Scenario: Adjustable AC voltage control in laboratory bench power supplies and lighting dimmers. IC Role / Device Role / Timing Role: Line-synchronized phase-controlled switch regulating RMS output voltage via firing angle adjustment. Use Value: 1.6 V VTM ensures <20 W conduction loss at full 12 A load, minimizing heatsink size and improving efficiency vs. higher-drop alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR-based AC power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TYN812TRG | Same VDRM/VRRM (800 V), same package, but IGT = 5 mA (lower gate drive requirement). | Better suited for low-power gate drivers (e.g., optocouplers with limited CTR); less immune to noise-induced false triggering. | Select when gate drive capability is constrained and system EMI is well-controlled. |
| TYN612RG | Lower VDRM/VRRM = 600 V; identical IGT = 15 mA, IT(RMS) = 12 A, TO-220AB package. | Limited to 277 VAC systems; unsuitable for 400 VAC or universal-input industrial equipment. | Choose only for cost-sensitive 230 VAC-only applications where 600 V margin suffices. |
Compared with TYN812TRG, the TYN812RG offers higher noise immunity due to its 15 mA IGT, while compared with TYN612RG, it provides essential 800 V blocking headroom for 400 VAC industrial use-making it the balanced choice for robust, globally deployable AC control.
Availability
TYN812RG is available at Aetrix Electronics and suitable for motor control in power tools, overvoltage crowbar protection in industrial PSUs, and inrush limiting in medical imaging systems requiring stable component supply across multi-year production cycles.
Supply support for TYN812RG 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, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The TYN series belongs to ST's standard SCR product line, engineered for cost-effective, high-reliability AC power control in industrial equipment where ruggedness, thermal stability, and long-term manufacturability are prioritized.
FAQ
What is the maximum junction temperature for continuous operation?
The TYN812RG has an operating junction temperature range of –40 °C to +125 °C. For continuous 12 A RMS conduction, case temperature must be held ≤110 °C using a heatsink with thermal resistance ≤1.3 °C/W to maintain junction temperature within limit.
Is the TO-220AB tab electrically isolated?
No-the metal tab of the TYN812RG in TO-220AB package is internally connected to the anode terminal. Electrical isolation from the heatsink requires a mica or polymer insulating washer and shoulder washer on the mounting screw.
Can TYN812RG replace TYN812TRG in existing designs?
Yes, mechanically and electrically-both share identical TO-220AB package, 800 V rating, and 12 A RMS rating-but TYN812RG requires 15 mA gate current versus 5 mA for TYN812TRG, so verify driver capability and noise immunity requirements before substitution.
Does TYN812RG support snubberless operation?
It is not rated for snubberless operation. With dV/dt = 200 V/µs minimum, external RC snubbers are recommended in inductive load switching (e.g., motor windings) to prevent false triggering during turn-off commutation.
TYN812RG 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):
- 15 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):
- 30 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
TYN812RG FAQ
1.How can I place an order for TYN812RG through Aetrix?
Please submit a Request for Quotation (RFQ) for TYN812RG 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 TYN812RG reliable?
The price and inventory of TYN812RG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TYN812RG is usually 5 days.
3.What payment methods are accepted for TYN812RG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TYN812RG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TYN812RG?
TYN812RG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TYN812RG 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 TYN812RG?
For technical support, including TYN812RG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TYN812RG requirements.
6.How does Aetrix verify that TYN812RG is sourced from the original manufacturer or authorized distributors?
All TYN812RG 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 TYN812RG meets industry standards.
7.What is the process for return or replacement of TYN812RG?
All TYN812RG units undergo pre-shipment inspection (PSI). If there is an issue with TYN812RG, 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 TYN812RG part is unused and in its original packaging.
Return procedure for TYN812RG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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