My Inquiry
My Account
STMicroelectronics T850H-6G
- Part No.:
- T850H-6G
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
T850H-6G.pdf
- Description:
- TRIAC ALTERNISTOR 600V 8A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:7,266
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
T850H-6G from STMicroelectronics is a high-temperature, snubberless 8 A, 600 V Triac in D²PAK package, rated for 150 °C junction operation with 50 mA gate trigger current (IGT), 1000 V/µs dV/dt immunity at 150 °C, and 11 A/ms critical commutation current (dI/dt)c - designed for universal motor control in vacuum cleaners and washing machine drum drives.
For engineers reviewing the T850H-6G datasheet, T850H-6G pinout, T850H-6G application, or T850H-6G equivalent, key selection criteria include high-temperature commutation capability, low thermal resistance (1.85 °C/W j-c), insulated voltage rating (2500 VRMS), and snubberless operation in high-density AC switching circuits.
Technical Context
This Triac operates in all three quadrants without external snubbers, leveraging internal ceramic insulation and clip-bonding to achieve 1.85 °C/W junction-to-case thermal resistance and stable turn-off commutation up to 150 °C. Its 1000 V/µs dV/dt rating at elevated temperature ensures robust noise immunity in mains-connected motor drives.
The device delivers 8 A RMS on-state current at TC = 133 °C in D²PAK, with on-state voltage as low as 0.80 V (Vt₀) and dynamic resistance of 52 mΩ at 150 °C - enabling reduced conduction losses and smaller heatsinks versus conventional Triacs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 8 A RMS - supports continuous 1.8 kW resistive load at 230 VAC with appropriate heatsinking |
| VDRM / VRRM | 600 V - withstands peak mains voltage (≈325 V) with >85 % margin for surge transients |
| IGT (max) | 50 mA - compatible with standard microcontroller GPIO or low-power driver ICs without buffer stages |
| dV/dt (min) | 1000 V/µs at Tj = 150 °C - eliminates need for RC snubber in most universal motor phase-control applications |
| (dI/dt)c (min) | 11 A/ms at Tj = 150 °C - enables reliable commutation during zero-crossing switching of inductive loads |
| Rth(j-c) | 1.85 °C/W - allows direct mounting to PCB copper pour or compact heatsink for thermal management |
| Isolation Voltage | 2500 VRMS - meets reinforced insulation requirements for Class I appliances per IEC 60335 |
Pinout & Package
D²PAK (TO-263) package with isolated tab, epoxy molded, lead-free terminations, UL certified (E81734), RoHS compliant. Tab is electrically connected to A2 terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Main Terminal 1 | Reference terminal for gate triggering; connects to load return side in standard phase-control topology |
| A2 | Main Terminal 2 | High-side main terminal; electrically tied to insulated metal tab for thermal conduction and isolation |
| G | Gate | Control input requiring ≥50 mA pulse to trigger conduction in all quadrants; referenced to A1 |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless operation | Eliminates external RC network in 95 % of universal motor phase-control designs, reducing BOM count and board space |
| 150 °C max. Tj commutation | Enables full 8 A RMS rating in compact enclosures where ambient + self-heating exceeds 100 °C |
| Low Rth(j-c) = 1.85 °C/W | Reduces required heatsink mass by ~40 % vs. TO-220AB Triacs under identical thermal conditions |
| 3-quadrant high commutation | Supports leading-edge and trailing-edge dimming topologies without gate polarity constraints |
| 2500 VRMS isolation | Permits direct integration into primary-side control circuits without additional barrier components |
Applications
| Vacuum Cleaner Motor Control | Washing Machine Drum Drive |
|---|---|
Use Scenario: Variable-speed universal motor control via phase-angle firing in portable and upright vacuum cleaners. IC Role / Device Role / Timing Role: Main AC power switch triggered by MCU-generated gate pulses synchronized to zero-crossing detection. Use Value: Snubberless operation reduces EMI filter complexity; 150 °C rating permits sealed housing without forced airflow. |
Use Scenario: Bidirectional speed/torque control of brushed universal motor driving washing machine drum during wash/spin cycles. IC Role / Device Role / Timing Role: High-current AC switch enabling precise half-cycle conduction control for torque modulation. Use Value: 11 A/ms (dI/dt)c ensures clean commutation during rapid direction reversal under high inertia load. |
| Power Tool Speed Regulation | Industrial Fan Motor Interface |
Use Scenario: Trigger-based speed control in corded drills, sanders, and grinders using analog or PWM-derived gate drive. IC Role / Device Role / Timing Role: Primary power switching element handling 8 A RMS surges during stall conditions. Use Value: 80 A non-repetitive surge rating (tp = 20 ms) withstands startup inrush without degradation. |
Use Scenario: Mains-powered centrifugal fan control in HVAC and industrial enclosures with limited ventilation. IC Role / Device Role / Timing Role: Isolated AC switch interfacing microcontroller to 230 VAC fan motor with reinforced insulation. Use Value: 2500 VRMS isolation and 1.85 °C/W Rth(j-c) enable safe, thermally stable operation in confined metal cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Triac-based AC switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BTB16-600CW | 16 A rating, TO-220 package, 50 mA IGT, but only rated to 125 °C Tj and requires snubber in >100 °C environments | Larger footprint and higher thermal mass; unsuitable for ultra-compact, high-ambient designs | Select when higher current headroom is needed and board space allows TO-220 mounting |
| T850H-6T | Same die, TO-220AB package (non-insulated), Rth(j-c) = 1.85 °C/W, but lacks 2500 VRMS isolation | Requires external insulation barrier for safety-critical primary-side use | Select when isolation is handled at system level (e.g., optocoupler + heatsink isolation) and cost is prioritized |
Compared with BTB16-600CW and T850H-6T, the T850H-6G uniquely combines D²PAK surface-mount compatibility, reinforced 2500 VRMS isolation, and guaranteed 150 °C commutation - making it optimal for space-constrained, safety-certified, high-temperature motor control.
Availability
T850H-6G is available at Aetrix Electronics and suitable for vacuum cleaner motor control, washing machine drum drives, power tool speed regulation, and industrial fan interfaces requiring stable component supply across long-lifecycle consumer appliance programs.
Supply support for T850H-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 T850H-6G belongs to ST's Snubberless™ Triac product line, engineered specifically for high-power-density, high-temperature AC switching in universal motor and resistive load applications where reliability and thermal efficiency are critical.
FAQ
What is the maximum junction temperature for reliable commutation?
The T850H-6G is fully characterized for turn-off commutation up to 150 °C junction temperature, with minimum (dI/dt)c = 11 A/ms and dV/dt = 1000 V/µs guaranteed at that condition - enabling operation in sealed, high-ambient environments without derating.
Does the D²PAK package provide electrical isolation between the tab and terminals?
Yes - the D²PAK variant (T850H-6G) incorporates an internal ceramic pad providing 2500 VRMS isolation between the metal tab (A2) and the PCB mounting surface, satisfying reinforced insulation requirements per IEC 60335 for Class I appliances.
Can T850H-6G replace T835H-6G in existing designs?
Yes - both share identical package, voltage rating, and thermal specs, but T850H-6G has higher IGT (50 mA vs. 35 mA), requiring verification that the gate drive circuit can deliver sufficient current; otherwise, no layout or thermal changes are needed.
Is a heatsink required for 8 A RMS operation?
Yes - at 8 A RMS and 230 VAC, power dissipation exceeds 2 W; with Rth(j-c) = 1.85 °C/W, a heatsink or ≥25 cm² 70 µm copper pour is required to maintain Tj ≤ 150 °C at 60 °C ambient, per Figure 2 in the datasheet.
T850H-6G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Snubberless™
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Alternistor - Snubberless
- Voltage - Off State:
- 600 V
- Current - On State (It (RMS)) (Max):
- 8 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 80A, 84A
- Current - Gate Trigger (Igt) (Max):
- 50 mA
- Current - Hold (Ih) (Max):
- 75 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
T850H-6G FAQ
1.How can I place an order for T850H-6G through Aetrix?
Please submit a Request for Quotation (RFQ) for T850H-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 T850H-6G reliable?
The price and inventory of T850H-6G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T850H-6G is usually 5 days.
3.What payment methods are accepted for T850H-6G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T850H-6G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T850H-6G?
T850H-6G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T850H-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 T850H-6G?
For technical support, including T850H-6G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T850H-6G requirements.
6.How does Aetrix verify that T850H-6G is sourced from the original manufacturer or authorized distributors?
All T850H-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 T850H-6G meets industry standards.
7.What is the process for return or replacement of T850H-6G?
All T850H-6G units undergo pre-shipment inspection (PSI). If there is an issue with T850H-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 T850H-6G part is unused and in its original packaging.
Return procedure for T850H-6G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T850H-6G Tags
-
Z0103NN5AA4
STMicroelectronics
-
Z0107MNT1G
Littelfuse Inc.
-
Z0103MNT1G
Littelfuse Inc.
;;2.jpg)
-
T405-800B-TR
STMicroelectronics
-
T835-600B-TR
STMicroelectronics
.JPG)
-
2N6073BG
Littelfuse Inc.
-
2N6075BG
Littelfuse Inc.
-
BTA08-600CWRG
STMicroelectronics
-
T835H-6G-TR
STMicroelectronics
-
BTA16-800BRG
STMicroelectronics
-
T1210-800G-TR
STMicroelectronics
-
MAC4DHMT4G
Littelfuse Inc.
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
