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STMicroelectronics TN815-800B-TR
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- Part No.:
- TN815-800B-TR
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
TN815-800B-TR.pdf
- Description:
- SCR 800V 8A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:2,320
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Product details
Overview
TN815-800B-TR from STMicroelectronics is an 8 A, 800 V standard-sensitivity silicon-controlled rectifier (SCR) in DPAK surface-mount package, with maximum gate trigger current IGT = 15 mA, on-state voltage VTM ≤ 1.6 V at 16 A, and dV/dt immunity ≥ 50 V/µs at 125 °C - used for overvoltage crowbar protection and motor control in power tools.
For engineers reviewing the TN815-800B-TR datasheet, TN815-800B-TR pinout, TN815-800B-TR application, or TN815-800B-TR equivalent, key selection criteria include repetitive peak off-state voltage (800 V), RMS on-state current (8 A), thermal resistance junction-to-case (1.3 °C/W), gate trigger sensitivity (15 mA), and DPAK footprint compatibility with automated SMT assembly.
Technical Context
This SCR operates in phase-controlled rectification and latching switch mode, requiring gate pulse triggering to initiate conduction and sustaining current (IH ≤ 40 mA) to maintain on-state. Its dV/dt immunity of ≥50 V/µs at Tj = 125 °C enables reliable operation in noisy AC line environments without false triggering.
The device features a low dynamic resistance (Rd ≤ 46 mΩ) and threshold voltage (Vt0 ≤ 0.85 V) at 125 °C, supporting efficient power handling up to 70 A non-repetitive surge (tp = 10 ms) and 45 A²s I²t rating - critical for inrush current limiting and capacitive discharge ignition circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM/VRRM | 800 V - blocks 800 V peak reverse or off-state voltage in AC line applications |
| IT(RMS) | 8 A - supports continuous RMS load current up to 8 A at TC = 91 °C (DPAK) |
| IGT | 15 mA max - requires ≤15 mA gate drive for reliable turn-on under worst-case conditions |
| VTM | ≤1.6 V at 16 A - ensures low conduction loss and minimal self-heating during high-current pulses |
| dV/dt | ≥50 V/µs at 125 °C - prevents spurious turn-on from fast transient voltage spikes |
| Rth(j-c) | 1.3 °C/W - enables effective heat transfer to PCB copper pad for thermal management |
| I²t | 45 A²s (tp = 10 ms) - defines fusing limit for short-circuit protection coordination |
Pinout & Package
Package: DPAK (TO-252), surface-mount, single-ended tab configuration with exposed cathode pad for thermal and electrical connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Main current entry terminal | Carries full load current into device; electrically isolated from tab in DPAK |
| Cathode (K) | Main current exit terminal & thermal path | Connected to exposed metal tab; must be soldered to large copper area for heat dissipation |
| Gate (G) | Control input for turn-on initiation | Receives low-energy trigger pulse; sensitive to noise - requires proper layout and gate resistor |
Key Features
| Feature | Design Value |
|---|---|
| Standard gate sensitivity | IGT = 15 mA max - balances robust triggering with noise immunity in industrial environments |
| High dV/dt immunity | ≥50 V/µs at 125 °C - eliminates need for external snubbers in many AC switching applications |
| Low on-state loss | VTM ≤ 1.6 V and Rd ≤ 46 mΩ - reduces power dissipation and improves system efficiency at 8 A RMS |
| Optimized thermal performance | Rth(j-c) = 1.3 °C/W - allows >5 W power dissipation with modest PCB copper area (≥1 cm²) |
| ECOPACK® compliant | Halogen-free molding compound, lead-free plating - meets RoHS and environmental compliance requirements |
Applications
| Overvoltage Crowbar Protection | Power Tool Motor Control |
|---|---|
Use Scenario: Fast-acting shutdown circuit triggered by overvoltage detection to short AC line and blow fuse. IC Role / Device Role / Timing Role: Latching high-current switch activated by comparator-driven gate pulse; holds until AC zero-crossing. Use Value: 800 V blocking voltage withstands line surges; 70 A surge rating handles fault energy before fuse interruption. | Use Scenario: Phase-angle controlled speed regulation in universal motor-based corded drills and sanders. IC Role / Device Role / Timing Role: Half-wave or full-wave AC power switch synchronized to line zero-crossing for precise firing angle control. Use Value: 8 A RMS rating supports typical 500–800 W tool loads; DPAK package enables compact, automated PCB assembly. |
| Inrush Current Limiting | Capacitive Discharge Ignition (CDI) |
Use Scenario: Soft-start circuit limiting surge into transformer primary or large bulk capacitor banks. IC Role / Device Role / Timing Role: Delayed turn-on SCR bypassing NTC thermistor after warm-up; triggered once steady-state is reached. Use Value: 45 A²s I²t rating coordinates with upstream fuses; 15 mA IGT allows direct drive from microcontroller GPIO via buffer. | Use Scenario: High-voltage pulse generator for spark plug ignition in small engines (lawnmowers, generators). IC Role / Device Role / Timing Role: Energy dump switch releasing stored capacitor charge through ignition coil primary winding. Use Value: 1.6 V VTM minimizes voltage drop during high di/dt discharge; 100 A non-repetitive surge handles peak coil currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TN815-800H | Same electrical specs, IPAK package (Rth(j-c) = 1.3 °C/W), larger footprint, higher weight (0.4 g) | Better thermal mass for intermittent high-power bursts; requires through-hole or larger SMT pad | Select when board space permits larger package and higher thermal inertia is beneficial |
| TYN608RG | Same 8 A/800 V rating, TO-220AB package (Rth(j-c) = 1.3 °C/W), IGT = 15 mA, but higher IH (30 mA vs. 40 mA) | Through-hole mounting; suited for prototyping, heatsink attachment, and higher vibration environments | Select when mechanical robustness, field serviceability, or heatsink integration is required |
Compared with TN815-800H and TYN608RG, the TN815-800B-TR offers identical electrical performance in a compact, tape-and-reel ready DPAK package optimized for high-volume SMT production - balancing thermal capability, board space, and assembly efficiency.
Availability
TN815-800B-TR is available at Aetrix Electronics and suitable for overvoltage crowbar protection, power tool motor control, and inrush current limiting applications requiring stable component supply and long-term industrial availability.
Supply support for TN815-800B-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, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The TN8 series belongs to ST's high-reliability SCR product line, engineered specifically for ruggedized AC power control in appliances, power tools, and industrial equipment where robustness, thermal stability, and long-term parametric consistency are essential.
FAQ
What is the maximum junction temperature for continuous operation?
The TN815-800B-TR has an operating junction temperature range of –40 °C to +125 °C. Continuous operation at Tj = 125 °C is permitted when case temperature is maintained at ≤91 °C per datasheet derating curves - achieved using ≥1 cm² copper area under the cathode tab per DPAK thermal guidelines.
Does this SCR require a heatsink in typical 8 A RMS applications?
No external heatsink is required if the DPAK cathode tab is soldered to ≥1 cm² of 35 µm copper on FR4 PCB, achieving Rth(j-a) ≈ 70 °C/W. At 8 A RMS and 1.6 V VTM, power dissipation is ~6.4 W; with Rth(j-c) = 1.3 °C/W, junction-to-case rise is ~8.3 °C - well within limits when ambient is ≤85 °C.
Can TN815-800B-TR be driven directly from a 3.3 V microcontroller GPIO?
No - its maximum gate trigger current is 15 mA at 12 V, and VGT is up to 1.3 V. A 3.3 V GPIO cannot reliably source sufficient current; a dedicated gate driver (e.g., optocoupler with transistor output or discrete NPN buffer) is required to deliver ≥15 mA into the gate-cathode junction under worst-case temperature and aging conditions.
Is the DPAK package lead-free and RoHS compliant?
Yes - the TN815-800B-TR uses lead-free package leads and halogen-free molding compound, meeting RoHS Directive 2011/65/EU and ECOPACK® environmental standards. The "-TR" suffix confirms tape-and-reel packaging compatible with automated SMT lines.
TN815-800B-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- 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):
- 5 A
- Current - On State (It (RMS)) (Max):
- 8 A
- Current - Hold (Ih) (Max):
- 40 mA
- Current - Off State (Max):
- 5 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 70A, 73A
- SCR Type:
- Standard Recovery
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
TN815-800B-TR FAQ
1.How can I place an order for TN815-800B-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for TN815-800B-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 TN815-800B-TR reliable?
The price and inventory of TN815-800B-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TN815-800B-TR is usually 5 days.
3.What payment methods are accepted for TN815-800B-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TN815-800B-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TN815-800B-TR?
TN815-800B-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TN815-800B-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 TN815-800B-TR?
For technical support, including TN815-800B-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TN815-800B-TR requirements.
6.How does Aetrix verify that TN815-800B-TR is sourced from the original manufacturer or authorized distributors?
All TN815-800B-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 TN815-800B-TR meets industry standards.
7.What is the process for return or replacement of TN815-800B-TR?
All TN815-800B-TR units undergo pre-shipment inspection (PSI). If there is an issue with TN815-800B-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 TN815-800B-TR part is unused and in its original packaging.
Return procedure for TN815-800B-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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