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STMicroelectronics BTA10-400BRG
- Part No.:
- BTA10-400BRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
BTA10-400BRG.pdf
- Description:
- TRIAC 400V 10A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:6,915
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Product details
Overview
BTA10-400BRG from STMicroelectronics is a 10 A, 400 V RMS insulated triac in TO-220AB package, rated for 2500 VRMS isolation, designed for AC mains switching in phase-control and ON/OFF applications including heating regulation, motor starting, and light dimming with inductive loads.
For engineers reviewing the BTA10-400BRG datasheet, BTA10-400BRG pinout, BTA10-400BRG application, or BTA10-400BRG equivalent, key selection criteria include snubberless 3-quadrant commutation performance (dV/dt ≥ 1000 V/µs), insulated tab compliance with UL1557 (E81734), and thermal resistance Rth(j-c) = 2.4 °C/W at Tc = 95 °C.
Technical Context
This triac operates in three quadrants (I, II, III) with Snubberless™ capability, enabling reliable commutation on inductive loads without external snubbers. Its gate trigger current is specified at 50 mA max (IGT), with holding current ≤ 50 mA and latching current ≤ 70 mA at 25 °C.
It features a low dynamic on-state resistance of 40 mΩ at 125 °C and threshold voltage VTO ≤ 0.85 V, supporting efficient power handling up to 10 A RMS. The device sustains non-repetitive surge current ITSM = 105 A (60 Hz, 16.7 ms) and critical rate of rise of on-state current dl/dt ≥ 50 A/µs under defined test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 10 A - Sustained AC load current rating at Tc = 95 °C for insulated TO-220AB package |
| VDRM / VRRM | 400 V - Peak repetitive off-state voltage blocking capability in both directions |
| IGT (max) | 50 mA - Maximum gate trigger current required to initiate conduction in all active quadrants |
| dV/dt (min) | 1000 V/µs - Minimum rate of voltage rise the device withstands without false triggering at 125 °C |
| Rth(j-c) | 2.4 °C/W - Junction-to-case thermal resistance enabling thermal design with heatsink mounting |
| Isolation Rating | 2500 VRMS - Reinforced insulation between tab and internal die per UL1557 (file E81734) |
| (dI/dt)c (min) | 9 A/ms - Minimum commutation current rate-of-change the device supports without turn-off failure |
Pinout & Package
Package: TO-220AB Insulated - thermally conductive but electrically isolated metal tab (2500 VRMS), 3-pin through-hole mount with center-tab configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate triggering; current return path in quadrant I and III conduction |
| A2 (MT2) | Main Terminal 2 | High-side main current path; polarity reference for gate voltage (A2 referenced to A1) |
| G | Gate | Control input requiring ≤50 mA pulse to initiate conduction; referenced to A1 in standard drive configurations |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless™ 3Q operation | Enables direct drive of inductive loads (e.g., motors, solenoids) without external RC snubber networks |
| UL1557 certified insulation | 2500 VRMS reinforced isolation meets safety standards for mains-connected equipment |
| Low Rth(j-c) = 2.4 °C/W | Reduces thermal derating at high ambient temperatures; supports compact heatsink designs |
| High dV/dt immunity (1000 V/µs) | Prevents false triggering in noisy industrial environments with fast-switching loads |
| RoHS-compliant ECOPACK® | Meets EU Directive 2002/95/EC; lead-free termination and halogen-free molding compound |
Applications
| Heating Regulation Systems | Induction Motor Starting Circuits |
|---|---|
|
Use Scenario: Solid-state replacement for mechanical relays in electric water heaters and HVAC zone controls. IC Role / Device Role / Timing Role: AC mains switching element controlling resistive heater power via phase-angle or zero-crossing ON/OFF modulation. Use Value: Eliminates contact wear and arcing; enables precise temperature control with 10 A RMS continuous current handling and 2500 VRMS isolation for Class I appliance safety. |
Use Scenario: Inrush current limiting and run/start sequencing in single-phase induction motors for washing machines and compressors. IC Role / Device Role / Timing Role: Triac-based soft-start switch that applies full voltage only after rotor spin-up, reducing peak current stress. Use Value: Leverages Snubberless™ 3Q commutation (dV/dt ≥ 1000 V/µs) to prevent false turn-on during back-EMF transients, eliminating need for snubber components. |
| Light Dimming Modules | Industrial Static Relays |
|
Use Scenario: Leading-edge dimmer circuits in commercial LED and incandescent lighting systems. IC Role / Device Role / Timing Role: Phase-controlled AC switch synchronized to zero-crossing detection to adjust RMS output voltage. Use Value: Supports smooth dimming down to 5% brightness using 50 mA gate drive compatibility with standard optotriac drivers (e.g., MOC302x). |
Use Scenario: High-reliability replacement for electromechanical relays in PLC I/O modules and factory automation panels. IC Role / Device Role / Timing Role: Isolated AC output stage delivering fail-safe ON/OFF control to solenoid valves, pumps, and actuators. Use Value: UL-certified 2500 VRMS isolation ensures functional safety separation between control logic and 240 VAC field wiring per IEC 61000-4-5 surge immunity requirements. |
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 |
|---|---|---|---|
| BTA10-400BWRG | Same 10 A/400 V rating, but non-insulated TO-220AB package (no 2500 VRMS isolation) | Requires external insulation barrier or PCB creepage/clearance design for safety-critical mains interfaces | Select when cost-sensitive and isolation can be implemented externally; avoid where reinforced insulation is mandated. |
| T1050-4G | D²PAK surface-mount package, same 10 A/400 V rating, Snubberless™ 3Q, but lower Rth(j-c) = 1.5 °C/W and no insulated tab | Suitable for automated assembly and higher-power density layouts, but lacks built-in isolation; requires external isolation for safety | Choose for space-constrained SMT designs needing higher thermal efficiency; add discrete isolation if safety certification required. |
Compared with BTA10-400BRG, BTA10-400BWRG sacrifices isolation for lower cost and simpler mounting, while T1050-4G trades isolation for superior thermal performance and SMT compatibility-neither offers drop-in replacement without layout or safety redesign.
Availability
BTA10-400BRG is available at Aetrix Electronics and suitable for heating regulation systems, induction motor starting circuits, and industrial static relays requiring stable component supply, long-term lifecycle support, and UL-certified isolation.
Supply support for BTA10-400BRG 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, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
BTA10-400BRG belongs to ST's high-reliability triac product line targeting AC mains control in safety-critical, thermally demanding applications-designed specifically for robust phase control and snubberless inductive load switching.
FAQ
What is the maximum junction temperature for BTA10-400BRG?
The maximum operating junction temperature (Tj) is +125 °C, as specified in Table 1 of DS3165 Rev 9. This limit governs thermal design when calculating allowable case temperature (Tc ≤ 95 °C) and heatsink requirements using Rth(j-c) = 2.4 °C/W.
Does BTA10-400BRG require a heatsink in all applications?
A heatsink is required when IT(RMS) exceeds ~4.5 A at ambient temperatures above 40 °C, based on Figure 3 (RMS on-state current vs. case temperature). At full 10 A RMS, Tc must be held ≤ 95 °C, necessitating active or substantial passive cooling per thermal resistance calculations.
Can BTA10-400BRG be used with zero-crossing trigger circuits?
Yes-it supports zero-crossing triggering, though its Snubberless™ 3Q architecture is optimized for leading-edge phase control. Gate drive must respect IGT ≤ 50 mA and ensure sufficient pulse width (>10 µs) to guarantee turn-on across all quadrants, especially at low temperatures.
Is the insulated tab rated for continuous 2500 VRMS or only for dielectric strength testing?
The 2500 VRMS rating is a reinforced insulation specification validated per UL1557 (file E81734), meaning it is certified for continuous working voltage in double-insulation safety architectures-not just a short-duration test value. Creepage and clearance on PCB must still comply with end-equipment standards.
BTA10-400BRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Triac Type:
- Standard
- Voltage - Off State:
- 400 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:
- Through Hole
- Supplier Device Package:
- TO-220
BTA10-400BRG FAQ
1.How can I place an order for BTA10-400BRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTA10-400BRG 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 BTA10-400BRG reliable?
The price and inventory of BTA10-400BRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA10-400BRG is usually 5 days.
3.What payment methods are accepted for BTA10-400BRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA10-400BRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTA10-400BRG?
BTA10-400BRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTA10-400BRG 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 BTA10-400BRG?
For technical support, including BTA10-400BRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA10-400BRG requirements.
6.How does Aetrix verify that BTA10-400BRG is sourced from the original manufacturer or authorized distributors?
All BTA10-400BRG 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 BTA10-400BRG meets industry standards.
7.What is the process for return or replacement of BTA10-400BRG?
All BTA10-400BRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA10-400BRG, 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 BTA10-400BRG part is unused and in its original packaging.
Return procedure for BTA10-400BRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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