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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics BTA20-600CWRG

Name: BTA20-600CWRG
Brand: STMicroelectronics
SKU: BTA20-600CWRG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BTA20-600CWRG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: BTA20-600CWRG.pdf

Description:: TRIAC ALTERNISTOR 600V 20A TO220

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Product details

Overview

BTA20-600CWRG from STMicroelectronics is a 20 A, 600 V snubberless triac in insulated TO-220AB package, rated for 2500 V_rms voltage isolation between tab and terminals, with maximum gate trigger current of 35 mA (Q1 quadrant) and dV/dt immunity of 500 V/µs at 125 °C - used in phase-controlled AC lighting dimmers and solid-state relay modules driving inductive loads.

For engineers reviewing the BTA20-600CWRG datasheet, BTA20-600CWRG pinout, BTA20-600CWRG application, or BTA20-600CWRG equivalent, key selection criteria include insulated tab rating, snubberless dV/dt robustness, I²t fusing capability (200 A²s), surge current handling (210 A @ 50 Hz), and quadrant-specific gate sensitivity.

Technical Context

This triac employs glass-passivated silicon die with internal ceramic insulation to achieve 2500 V_rms isolation between the metal tab and all terminals. Its snubberless architecture eliminates external RC snubbers by sustaining ≥500 V/µs critical dV/dt without false triggering under inductive load commutation.

It operates across quadrants I, II, and III with asymmetric gate sensitivity: max 35 mA I_GT in Q1 and Q3, enabling low-power microcontroller-compatible triggering while maintaining 75 mA holding current (I_H) and 80 mA latching current (I_L) at 25 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	20 A continuous RMS on-state current at Tc = 70 °C - supports 2.4 kW resistive load at 120 VAC
VDRM / VRRM	600 V peak repetitive off-state voltage - suitable for 230 VAC mains with 2× safety margin
IGT (Q1)	Max 35 mA gate trigger current - compatible with standard GPIO or optocoupler drivers
dV/dt (c)	Min 11 V/µs critical dV/dt at 125 °C - ensures reliable turn-off during fast voltage transients
I²t (fusing)	200 A²s - defines single-pulse surge withstand limit before metallization failure
Rth(j-c)	2.1 °C/W (AC) - enables 18 W dissipation at 70 °C case temperature with minimal heatsink
VTM	Max 1.70 V on-state voltage at 28 A - yields ~48 W conduction loss at full load

Pinout & Package

Package: TO-220AB Insulated - epoxy body with electrically isolated metal tab rated 2500 V_rms, UL-certified (File E81734), lead-free, RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
A1	Main terminal 1 (MT1)	Anode of first SCR section; common reference for gate drive and load return path
A2	Main terminal 2 (MT2)	Anode of second SCR section; connects to AC line or load hot side
G	Gate	Control input; triggers conduction when referenced to A1; polarity-sensitive per quadrant

Key Features

Feature	Design Value
Snubberless operation	Eliminates external RC network by sustaining ≥500 V/µs dV/dt at 125 °C - reduces BOM count and PCB area
Voltage-insulated tab	2500 V_rms isolation between tab and terminals - enables direct heatsink mounting without insulating pads
High surge robustness	210 A non-repetitive surge (10 ms, 50 Hz) - withstands motor startup inrush and transformer magnetizing currents
Low IGT asymmetry	35 mA max I_GT in Q1/Q3 - allows use with low-drive optocouplers like MOC3021 without amplification
Clip assembly construction	Superior thermal and mechanical reliability vs. wire-bonded triacs - maintains parameter stability over 10⁵ switching cycles

Applications

AC Lighting Dimmer

Industrial Solid-State Relay

Use Scenario: Phase-angle controlled 230 VAC incandescent/halogen lamp dimming in residential and commercial fixtures.

IC Role / Device Role / Timing Role: Main power switching element; triggered at adjustable conduction angle to regulate RMS voltage delivered to lamp.

Use Value: Snubberless design avoids 10–15 component reduction per channel; 35 mA I_GT enables direct drive from MCU GPIO via 33 Ω series resistor.

Use Scenario: Replacement for electromechanical relays in PLC output modules controlling solenoid valves and contactors.

IC Role / Device Role / Timing Role: Bidirectional AC switch; conducts full half-cycles after gate pulse, providing zero-crossing–free switching for fast response.

Use Value: 2500 V_rms insulated tab allows direct bolt-on heatsink mounting; 210 A surge rating handles 5× inrush of 4 A solenoid coils.

Motor Speed Controller

Heating Element Regulator

Use Scenario: Single-phase universal motor speed control in power tools and kitchen appliances.

IC Role / Device Role / Timing Role: Phase-controlled AC switch in series with motor winding; gate timing adjusted to vary torque and RPM.

Use Value: 50 A/µs dI/dt rating prevents false turn-on during high di/dt commutation of brushed motor brushes.

Use Scenario: Temperature-regulated resistive heating in coffee makers, water heaters, and industrial ovens.

IC Role / Device Role / Timing Role: On/off or phase-fired controller modulating power to NiCr or FeCrAl heating elements.

Use Value: 20 A RMS rating supports up to 4.6 kW at 230 VAC; TO-220AB package enables compact 2-layer PCB layout with integrated heatsink.

Equivalent & Alternatives

The following parts are listed as comparable options for similar triac switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTB20-600CW	Non-insulated TO-220AB package; no voltage isolation between tab and terminals	Requires insulating washer and bushing for heatsink mounting; unsuitable where creepage/clearance mandates isolation	Select only if mechanical isolation is provided externally and space constraints prohibit insulated package
Z0109MN5AA4	9 A rating, TO-92 package, 600 V, 50 mA I_GT; lacks snubberless dV/dt rating	Not suitable for inductive loads >1 A; requires external snubber network	Use only for low-power resistive loads where gate drive margin exceeds 50 mA and board space is extremely limited

Compared with BTB20-600CW and Z0109MN5AA4, BTA20-600CWRG uniquely combines 20 A current, 600 V blocking, snubberless operation, and 2500 V_rms tab isolation - making it the sole choice for compact, high-reliability AC power control in safety-critical or thermally constrained designs.

Availability

BTA20-600CWRG is available at Aetrix Electronics and suitable for AC lighting dimmers, industrial solid-state relays, motor speed controllers, and heating element regulators requiring stable component supply and long-term production continuity.

Supply support for BTA20-600CWRG 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, designing and manufacturing analog, digital, and mixed-signal ICs, discrete devices, and MEMS sensors for automotive, industrial, and consumer markets.

The BTA series targets high-reliability AC power control applications, emphasizing snubberless operation, surge robustness, and insulated packaging for simplified thermal and safety compliance in mains-connected equipment.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The BTA20-600CWRG has an operating junction temperature range of –40 °C to +125 °C. Continuous operation must maintain T_j ≤ 125 °C, enforced via thermal design using R_th(j-c) = 2.1 °C/W (AC) and appropriate heatsinking - exceeding this limit risks parametric shift and accelerated wear-out.

Can this triac be triggered directly by a microcontroller GPIO pin?

Yes - with V_DD = 3.3 V or 5 V, a series resistor of 33 Ω limits gate current to ~100 mA peak, well above the 35 mA max I_GT requirement. Ensure GPIO can sink ≥100 mA briefly and that gate is referenced to A1, not ground, for proper quadrant I triggering.

Is the insulated tab rated for 2500 V_rms DC or AC?

The 2500 V_rms isolation rating applies specifically to AC voltage (50/60 Hz sinusoidal) between the metal tab and all terminals, per UL File E81734. For DC, the rating is derated per UL standards; actual DC withstand depends on creepage distance and material tracking resistance, not specified in the datasheet.

Does "Snubberless" mean no external components are ever needed?

No - "Snubberless" means the device sustains ≥500 V/µs dV/dt without false triggering *under specified test conditions* (inductive load, T_j = 125 °C). Highly reactive loads or fast-edge noise may still require RC snubbers; always validate in final circuit per IEC 61000-4-4/5.

BTA20-600CWRG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: Snubberless™

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

Triac Type:: Alternistor - Snubberless

Voltage - Off State:: 600 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):: 35 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

BTA20-600CWRG FAQ

1.How can I place an order for BTA20-600CWRG through Aetrix?

Please submit a Request for Quotation (RFQ) for BTA20-600CWRG 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 BTA20-600CWRG reliable?

The price and inventory of BTA20-600CWRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA20-600CWRG is usually 5 days.

3.What payment methods are accepted for BTA20-600CWRG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA20-600CWRG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BTA20-600CWRG?

BTA20-600CWRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BTA20-600CWRG 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 BTA20-600CWRG?

For technical support, including BTA20-600CWRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA20-600CWRG requirements.

6.How does Aetrix verify that BTA20-600CWRG is sourced from the original manufacturer or authorized distributors?

All BTA20-600CWRG 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 BTA20-600CWRG meets industry standards.

7.What is the process for return or replacement of BTA20-600CWRG?

All BTA20-600CWRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA20-600CWRG, 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 BTA20-600CWRG part is unused and in its original packaging.

Return procedure for BTA20-600CWRG:

1.Submit a request within 90 days.

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

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