My Inquiry
My Account
STMicroelectronics TN1205H-6G
- Part No.:
- TN1205H-6G
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
TN1205H-6G.pdf
- Description:
- SCR 600V 12A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:6,139
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TN1205H-6G from STMicroelectronics is a 600 V, 12 A RMS, medium-current silicon-controlled rectifier (SCR) in D²PAK package, with gate trigger current of 2–5 mA and rated for continuous operation up to 150 °C junction temperature. It serves as a high-noise-immunity AC line switch in crowbar protection, motor control for power tools, inrush limiting, and lighting dimming circuits.
For engineers reviewing the TN1205H-6G datasheet, TN1205H-6G pinout, TN1205H-6G application, or TN1205H-6G equivalent, key selection criteria include dV/dt immunity at 150 °C (100 V/µs), I²t rating (72 A²s), thermal resistance (Rth(j-c) = 1.3 °C/W), and dual-package availability (D²PAK/TO-220AB) for layout flexibility.
Technical Context
The TN1205H-6G is a unidirectional thyristor requiring gate-triggered turn-on and natural commutation via AC zero-crossing. Its static dV/dt immunity drops from 200 V/µs at 25 °C to 100 V/µs at 150 °C, and it sustains 126 A non-repetitive surge (8.3 ms) with 1.9 µs typical turn-on delay (tgt) under 100 mA gate drive.
It features low on-state voltage (1.6 V at 24 A, 25 °C; 0.8 V at 150 °C) and dynamic resistance of 30 mΩ, enabling efficient conduction in thermally constrained environments. Leakage current remains ≤3 mA at 150 °C and full 600 V blocking, supporting reliable hold-off in high-ambient applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 600 V - Sustains full AC line peaks (e.g., 400 V RMS mains) with 200 V margin before breakdown. |
| IT(RMS) | 12 A - Supports continuous load current up to 1.7 kW resistive at 230 VAC without heatsink at Tc = 136 °C. |
| IGT | 2–5 mA - Compatible with standard microcontroller GPIO or optocoupler drivers without external amplification. |
| dV/dt (Tj = 150 °C) | 100 V/µs - Resists false triggering from fast transients in noisy industrial motor-drive environments. |
| I²t (tp = 10 ms) | 72 A²s - Enables coordination with 10 A slow-blow fuses for robust short-circuit protection. |
| Rth(j-c) | 1.3 °C/W - Allows direct mounting to PCB copper pour or small heatsink for thermal management in space-limited designs. |
| VT (Tj = 150 °C) | 0.80 V - Reduces conduction loss by ~50% vs. 25 °C, improving efficiency in high-temperature enclosures. |
Pinout & Package
D²PAK (TO-263) surface-mount package with isolated tab (pin 3), optimized for high-power density PCB layouts and automated assembly. Thermal pad soldered to large copper area improves heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (Anode 1) | Main anode terminal | Carries full load current; connected to AC line or load return path in half-wave configurations. |
| A2 (Anode 2) | Main cathode terminal | Common reference for gate drive and load connection; electrically tied to heatsink in TO-220AB variant. |
| G (Gate) | Trigger control input | Accepts low-energy pulse (≥2 mA, ≥1.3 V) to initiate conduction; requires snubber if driving inductive loads. |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Junction-rated to 150 °C enables use in sealed enclosures or near heat sources without derating. |
| High noise immunity | 100 V/µs dV/dt at 150 °C ensures stable triggering in EMI-heavy motor-control environments. |
| Low gate drive requirement | 2–5 mA IGT allows direct interface with logic-level drivers, reducing BOM count and board space. |
| Robust surge capability | 126 A non-repetitive surge (8.3 ms) withstands capacitor-charging inrush and fault transients. |
| Halogen-free ECOPACK2 | Meets RoHS 2002/95/EC and JEDEC J-STD-020 reflow profiles for lead-free manufacturing. |
Applications
| Power Tool Motor Control | Inrush Current Limiting |
|---|---|
Use Scenario: Phase-angle controlled speed regulation in corded drills and sanders using triac/SCR-based AC drives. IC Role / Device Role / Timing Role: Main switching element in half-wave or full-wave AC power stage, triggered synchronously with line zero-crossing. Use Value: 12 A RMS rating supports >1.5 kW motors; 150 °C Tj allows compact packaging inside tool housings with minimal airflow. | Use Scenario: Limiting surge current during cold-start of LED drivers, SMPS, or transformer-fed supplies. IC Role / Device Role / Timing Role: Series-connected SCR that conducts only after inrush decays, then latches on for steady-state operation. Use Value: 72 A²s I²t rating coordinates precisely with NTC or fuse timing, preventing nuisance trips while protecting downstream components. |
| Overvoltage Crowbar Protection | Residential Lighting Dimming |
Use Scenario: Fast-acting shunt protection for DC rails (e.g., 48 V telecom systems) against overvoltage faults. IC Role / Device Role / Timing Role: Triggered by comparator output to short rail to ground, collapsing voltage within microseconds. Use Value: 1.9 µs turn-on delay (tgt) and 100 A/µs dl/dt ensure rapid clamping before IC damage occurs. | Use Scenario: Leading-edge phase-cut dimming for incandescent/halogen lamps in smart home wall switches. IC Role / Device Role / Timing Role: AC line switch gated once per half-cycle to control conduction angle and lamp brightness. Use Value: 2–5 mA IGT enables direct drive from low-power MCU timers; 600 V rating covers global mains (100–240 VAC). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR-based AC switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST's TN1215H-6G | Higher IGT (15 mA max), same VDRM/Rth(j-c), identical package | Requires stronger gate drive; less suitable for low-power MCU interfaces | Select when higher noise margin is needed and gate driver can supply ≥15 mA. |
| Littelfuse S6012L | Same 600 V/12 A rating, but TO-220 only; IGT = 15 mA; Rth(j-c) = 1.7 °C/W | No D²PAK option; higher thermal resistance limits power density | Choose for through-hole legacy designs where surface-mount is not feasible. |
Compared with TN1205H-6G, TN1215H-6G trades lower gate sensitivity for enhanced noise immunity, while S6012L sacrifices package flexibility and thermal performance for broad distributor availability in through-hole form.
Availability
TN1205H-6G is available at Aetrix Electronics and suitable for motor control, crowbar protection, and inrush limiting applications requiring stable component supply across industrial automation, power tool OEMs, and residential lighting programs.
Supply support for TN1205H-6G 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 TN1205H belongs to ST's high-temperature SCR family, engineered specifically for ruggedized AC power control in thermally demanding environments-such as enclosed motor drives and sealed lighting fixtures-where ambient temperatures exceed 85 °C.
FAQ
What is the maximum allowable case temperature for continuous 12 A RMS operation?
The datasheet specifies IT(RMS) = 12 A at Tc = 136 °C for both D²PAK and TO-220AB packages. This means the case (tab) must be maintained at or below 136 °C-achievable with a heatsink or large copper pour-to sustain full rated current without derating.
Can TN1205H-6G be used in DC circuits?
No-it is a unidirectional SCR requiring natural commutation via AC current zero-crossing. In DC, it latches on permanently after triggering unless externally forced off (e.g., with a series switch or reverse-voltage pulse), making it unsuitable for pure DC switching without auxiliary circuitry.
Is a snubber circuit required for inductive loads?
Yes-inductive loads generate voltage spikes during turn-off that can exceed VDRM. A standard RC snubber (e.g., 100 Ω + 100 nF) across A1–A2 is recommended to limit dV/dt and prevent false re-triggering, especially at elevated junction temperatures.
How does thermal resistance differ between D²PAK and TO-220AB packages?
D²PAK has Rth(j-c) = 1.3 °C/W (same as TO-220AB), but Rth(j-a) is 45 °C/W vs. 60 °C/W for TO-220AB-meaning the D²PAK achieves better ambient cooling when mounted on ≥1 cm² copper, critical for fanless or sealed designs.
TN1205H-6G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Off State:
- 600 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):
- 7.6 A
- Current - On State (It (RMS)) (Max):
- 12 A
- Current - Hold (Ih) (Max):
- 20 mA
- Current - Off State (Max):
- 5 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 120A, 126A
- SCR Type:
- Standard Recovery
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
TN1205H-6G FAQ
1.How can I place an order for TN1205H-6G through Aetrix?
Please submit a Request for Quotation (RFQ) for TN1205H-6G 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 TN1205H-6G reliable?
The price and inventory of TN1205H-6G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TN1205H-6G is usually 5 days.
3.What payment methods are accepted for TN1205H-6G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TN1205H-6G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TN1205H-6G?
TN1205H-6G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TN1205H-6G 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 TN1205H-6G?
For technical support, including TN1205H-6G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TN1205H-6G requirements.
6.How does Aetrix verify that TN1205H-6G is sourced from the original manufacturer or authorized distributors?
All TN1205H-6G 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 TN1205H-6G meets industry standards.
7.What is the process for return or replacement of TN1205H-6G?
All TN1205H-6G units undergo pre-shipment inspection (PSI). If there is an issue with TN1205H-6G, 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 TN1205H-6G part is unused and in its original packaging.
Return procedure for TN1205H-6G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TN1205H-6G 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…
