Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics BTA20-700BWRG

Name: BTA20-700BWRG
Brand: STMicroelectronics
SKU: BTA20-700BWRG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BTA20-700BWRG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: BTA20-700BWRG.pdf

Description:: TRIAC ALTERNISTOR 700V 20A TO220

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,893

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BTA20-700BWRG from STMicroelectronics is a 20 A, 700 V snubberless triac in insulated TO-220AB package, rated for 50 mA maximum gate trigger current (Q1 quadrant), designed for phase-controlled AC power switching in inductive and resistive loads such as motor speed controls and lighting dimmers.

For engineers reviewing the BTA20-700BWRG datasheet, BTA20-700BWRG pinout, BTA20-700BWRG application, or BTA20-700BWRG equivalent, key selection criteria include its 700 V off-state voltage rating, 210 A non-repetitive surge current capability, insulated tab (2500 V_rms), and snubberless operation enabling simplified EMI-compliant designs without external RC networks.

Technical Context

The BTA20-700BWRG operates as a bidirectional thyristor with four-quadrant triggering capability, where Q1 (A2+, G+) and Q3 (A2–, G–) are the primary conduction modes. Its snubberless architecture suppresses dv/dt-induced false triggering via internal dV/dt immunity of 500 V/µs (min) at 125 °C junction temperature.

It features a ceramic-insulated tab rated to 2500 V_rms per UL E81734, enabling direct heatsink mounting without isolation hardware. Thermal resistance from junction-to-case is 2.1 °C/W (AC), supporting high-power dissipation up to 30 W at T_c = 70 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	20 A - continuous RMS on-state current handling at T_c = 70 °C, suitable for 2.4 kW @ 120 VAC or 4.8 kW @ 240 VAC resistive loads
VDRM / VRRM	700 V - peak repetitive off-state blocking voltage, enabling use in 480 VAC industrial systems with safety margin
IGT (Q1 max)	50 mA - maximum gate trigger current required in quadrant 1, defining minimum driver strength needed
ITSM (50 Hz)	210 A - non-repetitive surge current for 10 ms, supporting motor startup inrush without failure
dV/dt (min)	500 V/µs - minimum critical rate of rise of off-state voltage at 125 °C, ensuring snubberless operation under fast transients
Rth(j-c)	2.1 °C/W - thermal resistance (AC), enabling 30 W power dissipation with ≤63 °C case-to-junction delta
V_TM	1.70 V - maximum on-state voltage at 28 A, limiting conduction loss to ≤48 W at full load

Pinout & Package

Package: TO-220AB insulated, with electrically isolated metal tab rated to 2500 V_rms, lead-free, UL94 V0 epoxy, 2.3 g weight, tube packaging (50 pcs).

Pin/Terminal	Circuit Role	Design Meaning
A1	Main Terminal 1 (MT1)	Reference terminal for gate triggering; polarity defines conduction quadrant (A2+/A1– or A2–/A1+)
A2	Main Terminal 2 (MT2)	High-side main current path; connected to load or line; determines voltage reference for dV/dt immunity
G	Gate	Control input for bidirectional turn-on; requires ≥50 mA pulse in Q1 for guaranteed triggering at worst-case temperature

Key Features

Feature	Design Value
Snubberless operation	Eliminates need for external RC snubber network by guaranteeing 500 V/µs dV/dt immunity at 125 °C junction temperature
Insulated tab	2500 V_rms isolation between tab and terminals per UL E81734, enabling direct heatsink mounting without insulating washers
High surge robustness	210 A non-repetitive surge current (10 ms, 50 Hz) supports inrush-tolerant motor control without derating
Clip assembly construction	Enhanced mechanical bond between chip and leadframe improves thermal cycling reliability and surge current endurance
ECOPACK® compliance	Lead-free, RoHS-compliant TO-220AB package meeting environmental standards without performance trade-offs

Applications

Industrial Motor Control

Residential Lighting Dimming

Use Scenario: Speed regulation of single-phase induction motors in HVAC blowers and pump drives.

IC Role / Device Role / Timing Role: Main AC power switch controlling conduction angle via phase-cut triggering.

Use Value: Snubberless design reduces component count and EMI filter complexity while sustaining 210 A startup surges.

Use Scenario: Leading-edge dimming of incandescent and halogen lamps in wall-mounted dimmer switches.

IC Role / Device Role / Timing Role: Bidirectional AC switching element triggered synchronously with zero-crossing detection.

Use Value: 700 V VDRM ensures compatibility with 230 VAC mains and transient overvoltages up to 1.5 kV.

Commercial Appliance Power Control

Heating Element Regulation

Use Scenario: On/off and proportional control of heating elements in ovens, coffee makers, and washing machine dryers.

IC Role / Device Role / Timing Role: Static AC switch replacing mechanical relays to enable silent, wear-free operation.

Use Value: 20 A IT(RMS) rating supports continuous 4.8 kW loads at 240 VAC with minimal thermal derating.

Use Scenario: Duty-cycle modulated power delivery to resistive heating coils in industrial process heaters.

IC Role / Device Role / Timing Role: High-current AC switching device operating in burst-fire or phase-angle mode.

Use Value: Insulated tab allows direct bolt-down to grounded chassis, simplifying thermal management and reducing creepage distance 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
BTB20-700BW	Non-insulated TO-220AB package; no 2500 V_rms tab isolation	Requires insulating hardware for heatsink mounting; unsuitable where creepage/clearance is constrained	Select when cost sensitivity outweighs isolation requirement and PCB layout permits insulation
BTA20-700CWRG	Same package and voltage rating, but 35 mA max IGT (Q1) instead of 50 mA	Lower gate drive demand enables use with weaker microcontroller GPIO or optocoupler outputs	Select when driving circuit lacks 50 mA sourcing capability or higher noise immunity is needed

Compared with BTB20-700BW, BTA20-700BWRG provides certified tab isolation for safer thermal integration; compared with BTA20-700CWRG, it trades lower gate sensitivity for higher robustness against gate noise in noisy industrial environments.

Availability

BTA20-700BWRG is available at Aetrix Electronics and suitable for industrial motor control, residential lighting dimming, commercial appliance power switching, and heating element regulation requiring stable component supply across long-lifecycle production programs.

Supply support for BTA20-700BWRG 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, mixed-signal, power, and microcontroller solutions for automotive, industrial, and consumer markets.

The BTA series triacs are part of ST's high-reliability power discrete portfolio, engineered specifically for snubberless AC power control in harsh electromagnetic and thermal environments.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The BTA20-700BWRG has an operating junction temperature range of –40 °C to +125 °C. For reliable long-term operation at full 20 A RMS current, case temperature must be maintained ≤70 °C per datasheet derating curves, corresponding to a maximum junction temperature of 125 °C with R_th(j-c) = 2.1 °C/W.

Does the insulated tab require electrical connection to circuit ground?

No - the insulated tab is electrically isolated from all three terminals (A1, A2, G) and rated to 2500 V_rms. It may be left floating, connected to chassis ground, or used as a heatsink interface without affecting circuit functionality or safety certification, provided creepage distances comply with end-equipment standards.

Can BTA20-700BWRG replace BTA20-600CWRG in existing designs?

Yes, with verification of system-level overvoltage margins. The 700 V VDRM/VRRM rating exceeds the 600 V version, offering improved transient tolerance. However, IGT max is 50 mA vs. 35 mA, so gate drive circuits must deliver sufficient current; also confirm thermal layout accommodates identical power dissipation.

Is this device suitable for zero-crossing switching applications?

Yes - the BTA20-700BWRG supports zero-crossing operation when triggered by a synchronized gate signal. Its low IH (holding current) of 50 mA max and stable turn-off characteristics ensure clean commutation at current zero, though snubberless design primarily targets phase-control, not zero-crossing-only use.

BTA20-700BWRG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: Snubberless™

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Not For New Designs

Triac Type:: Alternistor - Snubberless

Voltage - Off State:: 700 V

Current - On State (It (RMS)) (Max):: 20 A

Voltage - Gate Trigger (Vgt) (Max):: 1.5 V

Current - Non Rep. Surge 50, 60Hz (Itsm):: 210A, 200A

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:: Through Hole

Supplier Device Package:: TO-220

BTA20-700BWRG FAQ

1.How can I place an order for BTA20-700BWRG through Aetrix?

Please submit a Request for Quotation (RFQ) for BTA20-700BWRG 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 BTA20-700BWRG reliable?

The price and inventory of BTA20-700BWRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA20-700BWRG is usually 5 days.

3.What payment methods are accepted for BTA20-700BWRG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA20-700BWRG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BTA20-700BWRG?

BTA20-700BWRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BTA20-700BWRG 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 BTA20-700BWRG?

For technical support, including BTA20-700BWRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA20-700BWRG requirements.

6.How does Aetrix verify that BTA20-700BWRG is sourced from the original manufacturer or authorized distributors?

All BTA20-700BWRG 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 BTA20-700BWRG meets industry standards.

7.What is the process for return or replacement of BTA20-700BWRG?

All BTA20-700BWRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA20-700BWRG, 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 BTA20-700BWRG part is unused and in its original packaging.

Return procedure for BTA20-700BWRG:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…