My Inquiry
My Account
STMicroelectronics T1050-8G
- Part No.:
- T1050-8G
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
T1050-8G.pdf
- Description:
- TRIAC ALTERNISTOR 800V 10A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:1,473
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
T1050-8G from STMicroelectronics is a 10 A, 800 V Snubberless™ triac in D²PAK package, designed for high-reliability AC mains switching in inductive loads. It delivers 50 mA gate trigger current (IGT), 1000 V/µs dV/dt immunity at 125 °C, and 2500 VRMS insulated tab rating per UL1557 (E81734), enabling direct use in motor speed controllers and static relays without external snubbers.
For engineers reviewing the T1050-8G datasheet, T1050-8G pinout, T1050-8G application, or T1050-8G equivalent, this part is selected for robust 3-quadrant commutation in phase-control circuits where thermal resistance (Rth(j-c) = 1.5 °C/W), junction-to-case cooling, and insulation integrity are critical design constraints.
Technical Context
The T1050-8G is a 3-quadrant Snubberless™ triac optimized for inductive load commutation without external RC networks. Its internal ceramic insulation provides 2500 VRMS isolation between tab and die, meeting UL1557 requirements (file E81734), and its gate structure ensures stable triggering across -40 to +125 °C junction temperature range.
It operates with 50 mA maximum IGT, 1.3 V max VGT, and 500–1000 V/µs dV/dt immunity at 125 °C - parameters validated for reliable turn-on under high dv/dt transients common in motor drive and dimmer applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 10 A RMS on-state current - supports continuous 1.2 kW @ 120 VAC or 2.4 kW @ 240 VAC resistive loads |
| VDRM / VRRM | 800 V peak off-state voltage - enables safe operation on 240 VAC mains with ≥2× safety margin |
| IGT (max) | 50 mA - compatible with standard microcontroller GPIO or optocoupler drivers without amplification |
| dV/dt (min) | 1000 V/µs at 125 °C - eliminates false triggering in noisy inductive environments (e.g., compressor startups) |
| Rth(j-c) | 1.5 °C/W - allows 10 A conduction with ≤15 °C junction-to-case rise under forced-air cooling |
| Insulation Rating | 2500 VRMS tab-to-die - satisfies reinforced insulation requirements for Class I appliances per IEC 60335 |
| (dI/dt)c | 9 A/ms minimum - sustains rapid current rise during zero-crossing switching into inductive loads |
Pinout & Package
D²PAK (TO-263) surface-mount package with isolated metal tab; thermally efficient layout for PCB copper heatsinking (SCu = 2 cm² recommended).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate triggering; connected to load return path in most phase-control topologies |
| A2 (MT2) | Main Terminal 2 | High-side AC line connection; carries full load current and defines polarity reference for quadrants |
| G | Gate | Low-energy control input; triggers conduction when referenced to A1; requires ≥50 mA pulse for guaranteed turn-on |
| Tab (isolated) | Thermal & Electrical Reference | Electrically isolated metal pad rated 2500 VRMS; mounted directly to heatsink without insulator washer |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless™ 3Q operation | Eliminates need for external RC snubber in inductive load switching, reducing BOM count and board space |
| UL1557-certified insulation | 2500 VRMS isolation meets appliance safety standards without additional creepage/clearance design effort |
| Low Rth(j-c) = 1.5 °C/W | Enables compact thermal design: 10 A RMS sustained with ≤15 °C junction rise using 2 cm² copper pour |
| High dV/dt immunity (1000 V/µs) | Prevents spurious turn-on during voltage transients in motor drives and lighting ballasts |
| RoHS-compliant ECOPACK® | Meets EU Directive 2002/95/EC; no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE |
Applications
| Induction Motor Speed Control | Light Dimmer Circuit |
|---|---|
|
Use Scenario: Variable-speed control of single-phase induction motors in HVAC blowers and kitchen exhaust fans. IC Role / Device Role / Timing Role: Snubberless™ triac performing phase-angle AC power regulation via microcontroller-driven zero-crossing sync and gate pulse timing. Use Value: Eliminates snubber components while sustaining 9 A/ms commutation rate and 1000 V/µs dV/dt immunity during motor startup surges. |
Use Scenario: Leading-edge dimming of incandescent and halogen lamps in residential and commercial lighting systems. IC Role / Device Role / Timing Role: Main AC switching element triggered at programmable phase angle relative to zero-crossing detection signal. Use Value: Delivers flicker-free dimming down to 5% brightness with stable gate triggering (50 mA IGT) across temperature and line-voltage variations. |
| Static Relay Replacement | Heating Element Regulation |
|
Use Scenario: Solid-state replacement for electromechanical relays in industrial PLC output modules controlling 240 VAC solenoids and valves. IC Role / Device Role / Timing Role: High-reliability ON/OFF switching device with galvanically isolated tab enabling direct heatsink mounting in confined enclosures. Use Value: Achieves >10⁶ switching cycles with no contact wear, supported by 2500 VRMS insulation and 10 A RMS current rating. |
Use Scenario: Proportional power control of resistive heating elements in coffee makers, ovens, and water heaters. IC Role / Device Role / Timing Role: Phase-controlled AC switch modulating average power delivered to heater based on temperature feedback loop. Use Value: Maintains precise thermal setpoint with low thermal resistance (1.5 °C/W) and minimal on-state voltage drop (≤1.55 V @ 14 A). |
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 |
|---|---|---|---|
| BTA10-800BW | Same 10 A / 800 V / 50 mA specs but TO-220AB insulated package; Rth(j-c) = 2.4 °C/W vs. 1.5 °C/W | Requires mechanical mounting and insulating washer; better suited for through-hole prototyping or low-volume assembly | Select when manual soldering, field repair, or legacy footprint compatibility is required |
| T1035-6G | Lower 35 mA IGT, same D²PAK package; dV/dt = 500 V/µs (vs. 1000 V/µs); (dI/dt)c = 5.5 A/ms (vs. 9 A/ms) | Less robust against fast transients; suitable only for lighter inductive loads like small fans or transformers | Select only if gate drive capability is limited and load commutation stress is low |
Compared with BTA10-800BW and T1035-6G, the T1050-8G offers superior thermal performance and transient immunity - making it the preferred choice for high-duty-cycle, high-dV/dt applications such as compressor motor control and industrial heating systems.
Availability
T1050-8G is available at Aetrix Electronics and suitable for induction motor control, light dimming, and static relay replacement requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for T1050-8G 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, specializing in power, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.
The T10xx series belongs to ST's Snubberless™ triac product line, engineered specifically for reliable, snubber-free AC power control in inductive and capacitive load applications demanding high commutation robustness and safety certification.
FAQ
What is the maximum junction temperature for continuous operation of T1050-8G?
The T1050-8G has a specified operating junction temperature range of -40 to +125 °C. Continuous operation at 125 °C is permitted provided thermal design maintains case temperature ≤95 °C for D²PAK package, as confirmed in Table 1 of DS3165 Rev 9.
Can T1050-8G be used in 4-quadrant triggering configurations?
No - T1050-8G is a Snubberless™ 3-quadrant triac (quadrants I, II, III only). It lacks guaranteed gate sensitivity in quadrant IV, and its datasheet electrical characteristics (Table 3) explicitly exclude IV quadrant testing, unlike standard 4Q triacs such as BTA10-xCW variants.
Is the metal tab electrically connected to any internal terminal?
No - the D²PAK tab is fully insulated from A1, A2, and G terminals, with 2500 VRMS dielectric strength verified per UL1557 file E81734. This allows direct mounting to grounded heatsinks without isolation hardware.
What is the recommended PCB copper area for thermal management?
ST recommends a minimum 2 cm² copper surface under the tab for D²PAK packages (see Table 5 footnote 1). With this area, Rth(j-a) drops to 45 °C/W, enabling 10 A RMS operation with ≤45 °C ambient-to-junction rise under natural convection.
T1050-8G 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:
- 800 V
- Current - On State (It (RMS)) (Max):
- 10 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 100A, 105A
- Current - Gate Trigger (Igt) (Max):
- 50 mA
- Current - Hold (Ih) (Max):
- 50 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
T1050-8G FAQ
1.How can I place an order for T1050-8G through Aetrix?
Please submit a Request for Quotation (RFQ) for T1050-8G 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 T1050-8G reliable?
The price and inventory of T1050-8G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T1050-8G is usually 5 days.
3.What payment methods are accepted for T1050-8G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T1050-8G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T1050-8G?
T1050-8G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T1050-8G 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 T1050-8G?
For technical support, including T1050-8G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T1050-8G requirements.
6.How does Aetrix verify that T1050-8G is sourced from the original manufacturer or authorized distributors?
All T1050-8G 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 T1050-8G meets industry standards.
7.What is the process for return or replacement of T1050-8G?
All T1050-8G units undergo pre-shipment inspection (PSI). If there is an issue with T1050-8G, 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 T1050-8G part is unused and in its original packaging.
Return procedure for T1050-8G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T1050-8G 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
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…
