My Inquiry
My Account
STMicroelectronics TN815-800B
;;2.jpg)
- Part No.:
- TN815-800B
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
TN815-800B.pdf
- Description:
- SCR 800V 8A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:8,694
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TN815-800B from STMicroelectronics is a standard-sensitivity 8 A, 800 V silicon-controlled rectifier (SCR) in DPAK package, designed for phase-controlled AC power switching in motor drives and overvoltage crowbar protection circuits. It delivers 8 A RMS on-state current at 110 °C case temperature, supports 15 mA maximum gate trigger current, and features 50 A/µs critical rate of rise of on-state current for robust commutation in inductive loads.
For engineers reviewing the TN815-800B datasheet, TN815-800B pinout, TN815-800B application, or TN815-800B equivalent, this device is selected for high-reliability AC line control where precise gate sensitivity, thermal stability in compact surface-mount layouts, and surge immunity up to 100 A (10 ms) are required.
Technical Context
The TN815-800B operates as a unidirectional, gate-triggered thyristor with latching behavior after turn-on. Its 800 V repetitive peak off-state voltage enables use directly across 230 VAC mains with margin, while its 15 mA IGT (max) defines a standard-gate sensitivity tier-higher than sensitive TS820 series but lower than legacy TYN608-balancing noise immunity and drive simplicity.
Thermal design relies on DPAK's 1.3 °C/W junction-to-case resistance and 70 °C/W junction-to-ambient (S = 0.5 cm²), requiring PCB copper area optimization. The device sustains 100 A non-repetitive surge (tp = 10 ms) and exhibits 45 A²s I²t rating, supporting short-circuit energy absorption in crowbar configurations without immediate failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 8 A RMS on-state current at TC = 110 °C - supports continuous 230 VAC motor loads up to ~1.8 kW |
| VDRM/VRRM | 800 V repetitive peak off-state voltage - provides 2.5× safety margin over 230 VAC peak (325 V) |
| IGT (max) | 15 mA gate trigger current - compatible with standard microcontroller GPIO or optocoupler drivers |
| dl/dt (min) | 50 A/µs critical rate of rise - ensures reliable turn-on under fast-rising anode voltage transients |
| ITSM (10 ms) | 100 A non-repetitive surge - withstands inrush currents in power tool startup or capacitor charging |
| I²t (10 ms) | 45 A²s fusing integral - defines energy threshold before thermal runaway during fault conditions |
| Rth(j-c) | 1.3 °C/W junction-to-case - mandates direct thermal pad connection to PCB copper for safe 8 A operation |
Pinout & Package
DPAK (TO-252) package: surface-mount, single-tab, three-terminal outline with exposed cathode tab for thermal conduction. Dimensions per DS2118 Rev 9: 6.22 mm × 6.73 mm × 2.40 mm (L × W × H), 0.3 g weight, halogen-free epoxy, lead-free plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | High-side power input terminal | Carries full load current; must be routed with low-inductance trace to minimize dv/dt-induced false triggering |
| Cathode (K) | Low-side return path and thermal interface | Exposed metal tab serves as primary heat sink; requires minimum 0.5 cm² copper area for rated IT(RMS) |
| Gate (G) | Control input for latching turn-on | Receives 15 mA pulse to initiate conduction; sensitive to noise-requires local RC snubber or shielded routing |
Key Features
| Feature | Design Value |
|---|---|
| Standard gate sensitivity (15 mA IGT) | Enables robust triggering with common optocouplers (e.g., MOC3021) without external amplification |
| 800 V blocking capability | Permits direct integration into 230 VAC systems without series stacking or voltage dividers |
| 100 A surge rating (10 ms) | Supports repeated inrush events in power tools and kitchen appliance motors without derating |
| DPAK surface-mount package | Reduces board space by >50% vs. TO-220AB while maintaining thermal performance via PCB copper conduction |
| ECOPACK® compliant | Meets RoHS and halogen-free requirements for industrial and consumer end-equipment certification |
Applications
| Motor Control in Power Tools | Overvoltage Crowbar Protection |
|---|---|
Use Scenario: Phase-angle controlled speed regulation in corded drills and angle grinders using triac/SCR-based AC drive stages. IC Role / Device Role / Timing Role: Main power switch latched by zero-crossing synchronized gate pulse to regulate average motor torque. Use Value: 8 A RMS rating handles stall currents; 50 A/µs dl/dt prevents false turn-on during brush-commutation spikes. | Use Scenario: Fast-acting shunt protection circuit that shorts AC line to ground when transient overvoltage exceeds safe threshold. IC Role / Device Role / Timing Role: Latching crowbar element triggered by voltage comparator output, holding until AC cycle resets. Use Value: 100 A surge capacity absorbs lightning-induced surges; 800 V VDRM ensures no leakage during normal 230 VAC operation. |
| Inrush Current Limiting | Voltage Regulation Circuits |
Use Scenario: Soft-start for transformer-coupled power supplies or large electrolytic capacitor banks in industrial SMPS. IC Role / Device Role / Timing Role: Series-connected SCR bypassed after capacitor charge completes, limiting peak input current to <15 A. Use Value: 15 mA IGT allows clean triggering from timing ICs; DPAK footprint simplifies layout near bulk capacitors. | Use Scenario: Feedback-controlled AC voltage stabilizer for laboratory equipment or medical devices requiring precise RMS output. IC Role / Device Role / Timing Role: Bidirectional phase-control element (paired with complementary SCR) adjusting conduction angle per feedback loop. Use Value: Tight 1.6 V VTM max ensures minimal conduction loss at 8 A; stable 125 °C Tj rating supports sealed enclosure operation. |
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 (16.1 mm height, 0.4 g), Rth(j-c) = 1.3 °C/W identical, but larger footprint and through-hole compatible | Preferred where mechanical mounting strength or higher thermal mass is needed; unsuitable for dense SMT layouts | Select TN815-800H only if board assembly uses mixed-technology or requires screw-down heatsink interface |
| TYN608RG | Same 8 A/800 V rating, TO-220AB package (2.3 g), higher IGT max (15 mA same), but Rth(j-c) = 1.3 °C/W and ITSM = 95 A (10 ms) | Better suited for high-temperature ambient (>85 °C) due to superior case-to-heatsink conduction; not surface-mountable | Choose TYN608RG when forced-air cooling or bolted heatsinks are available and SMT is not required |
Compared with TN815-800H and TYN608RG, the TN815-800B uniquely balances SMT manufacturability, 800 V robustness, and 100 A surge tolerance-making it optimal for space-constrained, high-volume AC control modules where reflow compatibility and thermal pad integration are mandatory.
Availability
TN815-800B is available at Aetrix Electronics and suitable for motor control in power tools, overvoltage crowbar protection, and inrush current limiting circuits requiring stable component supply across industrial production cycles.
Supply support for TN815-800B 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The TN8 series belongs to ST's high-reliability thyristor product line, engineered specifically for ruggedized AC power control in cost-sensitive, high-volume applications such as white goods and power tools.
FAQ
What is the maximum junction temperature for continuous operation of TN815-800B?
The TN815-800B has a specified operating junction temperature range of –40 °C to +125 °C. For continuous 8 A RMS conduction, the case temperature must not exceed 110 °C, as defined in Table 1 of DS2118 Rev 9. Exceeding this limit risks thermal runaway due to positive temperature coefficient of on-state voltage.
Can TN815-800B replace TN805-600B in a 600 V design?
No-TN815-800B is rated for 800 V VDRM/VRRM and has 15 mA IGT, whereas TN805-600B is rated for 600 V and 5 mA IGT. Substituting the 800 V part in a 600 V design is electrically permissible but may reduce noise immunity due to higher gate trigger threshold; gate drive circuitry must be verified for compatibility.
Does TN815-800B require a heatsink in DPAK configuration?
Yes-when operating at full 8 A RMS, the DPAK package requires a minimum 0.5 cm² copper area under the cathode tab (per Table 4) to achieve the 1.3 °C/W Rth(j-c). Without adequate PCB copper, junction temperature will exceed 125 °C even at moderate ambient, risking premature failure.
Is TN815-800B compatible with standard optocoupler drivers like MOC3021?
Yes-the MOC3021 provides 100 mA peak output current and 15 mA DC-rated output, fully meeting the 15 mA IGT (max) requirement of TN815-800B. A series 100 Ω gate resistor is recommended to limit peak current and suppress ringing, per ST application note AN417.
TN815-800B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 FAQ
1.How can I place an order for TN815-800B through Aetrix?
Please submit a Request for Quotation (RFQ) for TN815-800B 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 reliable?
The price and inventory of TN815-800B 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 is usually 5 days.
3.What payment methods are accepted for TN815-800B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TN815-800B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TN815-800B?
TN815-800B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TN815-800B 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?
For technical support, including TN815-800B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TN815-800B requirements.
6.How does Aetrix verify that TN815-800B is sourced from the original manufacturer or authorized distributors?
All TN815-800B 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 meets industry standards.
7.What is the process for return or replacement of TN815-800B?
All TN815-800B units undergo pre-shipment inspection (PSI). If there is an issue with TN815-800B, 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 part is unused and in its original packaging.
Return procedure for TN815-800B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TN815-800B Tags
-
MCR12DSNT4G
Littelfuse Inc.
-
2N6404G
Littelfuse Inc.
-
S4015LTP
Littelfuse Inc.
-
VS-25TTS12HM3
Vishay General Semiconductor - Diodes Division
-
S4020LTP
Littelfuse Inc.
-
MCR12MG
Littelfuse Inc.
-
MCR69-3G
Littelfuse Inc.
-
S8025LTP
Littelfuse Inc.
-
CMA30E1600PN
IXYS
-
S8016RATP
Littelfuse Inc.
-
TXN625RG
STMicroelectronics
.jpg)
-
SK055RTP
Littelfuse Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
