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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics T1620T-6I

Name: T1620T-6I
Brand: STMicroelectronics
SKU: T1620T-6I
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T1620T-6I

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-220-3

Datasheet:: T1620T-6I.pdf

Description:: TRIAC ALTERNISTOR 600V 16A TO220

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Product details

Overview

T1620T-6I from STMicroelectronics is a Snubberless™ logic-level 16 A, 600 V RMS triac in a TO-220AB insulated package, designed for phase-angle and on/off AC line switching in motor control, lighting, and small appliance circuits. It delivers 20 mA gate trigger current (IGT) in Quadrants I, II, and III, supports 125 °C junction operation, and provides 2500 V_rms isolation with low thermal resistance (R_th(j-c) = 2.1 °C/W).

For engineers reviewing the T1620T-6I datasheet, T1620T-6I pinout, T1620T-6I application, or T1620T-6I equivalent, this part is selected for high-commutation AC switching where snubberless operation, robust dV/dt immunity (1000 V/µs at 125 °C), and reliable latching/holding behavior (IL = 35 mA, IH = 25 mA) are required in cost-sensitive industrial and consumer designs.

Technical Context

The T1620T-6I is a three-quadrant logic-level triac optimized for direct microcontroller gate drive without external amplification. Its Snubberless™ architecture eliminates need for external RC snubbers by sustaining ≥1000 V/µs critical dV/dt at 125 °C and supporting 50 A/µs di/dt under specified conditions.

It operates across -40 to +125 °C junction temperature, features 600 V blocking voltage (V_DRM/V_RRM), and achieves low on-state voltage (V_T ≤ 1.55 V at 22.6 A, 25 °C) with dynamic resistance ≤30 mΩ at 125 °C - enabling efficient thermal management in compact TO-220AB insulated packages.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	16 A continuous RMS current at Tc = 86 °C - defines maximum steady-state load handling capability in heatsink-mounted applications
VDRM / VRRM	600 V peak repetitive off-state voltage - ensures safe operation on 230 VAC mains with margin against transients
IGT (Q1–Q3)	20 mA max gate trigger current - enables direct drive from 3.3 V/5 V logic outputs without buffer stages
dV/dt (125 °C)	1000 V/µs minimum - prevents false triggering during fast voltage transients in noisy AC environments
ITSM (50 Hz)	120 A non-repetitive surge current - supports motor startup inrush and short-duration overloads
Rth(j-c)	2.1 °C/W junction-to-case thermal resistance - allows precise thermal design with standard TO-220 heatsinks
Isolation Voltage	2500 V_rms - meets reinforced insulation requirements for Class I appliances and industrial controls

Pinout & Package

Package: TO-220AB insulated (UL E81734 certified, RoHS compliant, epoxy UL94 V0 rated). Clip-bonded construction ensures low thermal resistance and high reliability.

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	Reference terminal for gate triggering; connected to load return or neutral side in typical AC switch configurations
A2 (MT2)	Main Terminal 2	High-side main current path; connects to AC line or hot side; polarity relative to A1 defines conduction quadrant
G	Gate	Control input for triggering; accepts logic-level pulses; functional in Quadrants I, II, and III per datasheet Table 3

Key Features

Feature	Design Value
Snubberless™ operation	Eliminates external RC snubber components in most AC switching applications, reducing BOM count and PCB area
Logic-level gate sensitivity	20 mA IGT max enables direct interface with MCU GPIOs or low-power drivers without level-shifting circuitry
High dV/dt immunity	1000 V/µs at 125 °C ensures stable operation in electrically noisy environments like power tools and motor drives
Insulated TO-220AB package	2500 V_rms isolation rating simplifies safety compliance and eliminates need for additional creepage/clearance barriers
Low Rth(j-c)	2.1 °C/W thermal resistance enables higher power density and reduces heatsink size versus standard triacs

Applications

Power Tool Motor Control

LED Dimmable Lighting

Use Scenario: Variable-speed control of universal motors in corded drills and sanders using phase-angle dimming.

IC Role / Device Role / Timing Role: Main AC power switch performing bidirectional conduction and zero-crossing synchronized firing.

Use Value: Snubberless operation avoids snubber losses and component stress during rapid motor commutation transients.

Use Scenario: Leading-edge dimming of LED driver inputs in residential and commercial luminaires.

IC Role / Device Role / Timing Role: AC line switch triggered by microcontroller-generated phase-delayed gate pulses.

Use Value: 20 mA IGT allows direct drive from low-power MCUs; 600 V rating covers 230 VAC + surge margins.

Small Appliance Heating Control

Inrush Current Limiting

Use Scenario: On/off cycling of heating elements in kettles, coffee makers, and irons.

IC Role / Device Role / Timing Role: High-reliability AC load switch activated by thermostat or controller output.

Use Value: 16 A RMS rating handles resistive loads up to ~3.7 kW at 230 VAC; UL certification supports end-product safety approval.

Use Scenario: Controlled turn-on of large capacitive input stages in SMPS or audio amplifiers.

IC Role / Device Role / Timing Role: Soft-start switch bypassing NTC thermistor after initial charge completion.

Use Value: 120 A surge rating absorbs capacitor inrush; 125 °C operation maintains reliability during repeated thermal cycling.

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
BTA16-600BWRG	16 A, 600 V, 50 mA IGT, non-Snubberless, TO-220 non-insulated	Requires external snubber; lacks 2500 V_rms isolation; needs heatsink isolation	Select when cost is primary constraint and isolation/space allow added components
T1635T-6I	Same package and voltage, but 35 mA IGT and higher dV/dt (2000 V/µs at 125 °C)	Better noise immunity; less sensitive to gate drive strength; slightly higher gate power demand	Select for harsh EMI environments or marginal gate drive sources

Compared with BTA16-600BWRG, T1620T-6I reduces system complexity via snubberless operation and built-in isolation; compared with T1635T-6I, it lowers gate drive burden while maintaining sufficient dV/dt margin for most consumer-grade motor and lighting controls.

Availability

T1620T-6I is available at Aetrix Electronics and suitable for motor control in power tools, dimmable lighting systems, and heating element switching in small home appliances requiring stable component supply and long-term production continuity.

Supply support for T1620T-6I 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, delivering innovative analog, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The T16T series belongs to ST's Snubberless™ triac product line, engineered specifically for cost-sensitive, high-reliability AC line switching applications where simplified design, reduced component count, and robust transient immunity are essential.

FAQ

What is the maximum junction temperature for continuous operation?

The T1620T-6I has a specified operating junction temperature range of -40 to +125 °C. Continuous operation must maintain Tj ≤ 125 °C, enforced via thermal design using its 2.1 °C/W junction-to-case resistance and appropriate heatsinking at Tc = 86 °C for full 16 A RMS rating.

Can this triac be driven directly by a 3.3 V microcontroller GPIO?

Yes - with a 20 mA maximum IGT and typical VGT ≤ 1.3 V, the T1620T-6I can be driven directly by a 3.3 V MCU GPIO through a series resistor (e.g., 150 Ω limits current to ~21 mA at 3.3 V), provided layout minimizes gate loop inductance to avoid false triggering.

Does the TO-220AB insulated package require electrical isolation from the heatsink?

No - the TO-220AB insulated package integrates internal isolation between the die and mounting base, providing 2500 V_rms withstand voltage. The metal tab can be directly bolted to an uninsulated heatsink without risk of shorting A2 to ground or chassis.

How does Snubberless™ operation improve reliability in motor control?

Snubberless™ design eliminates external RC networks that degrade over time due to capacitor aging and resistor drift. By sustaining ≥1000 V/µs dV/dt at 125 °C, the T1620T-6I avoids false turn-on during motor commutation spikes - reducing failure modes linked to snubber component fatigue or misdesign.

T1620T-6I Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: Snubberless™

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Triac Type:: Alternistor - Snubberless

Voltage - Off State:: 600 V

Current - On State (It (RMS)) (Max):: 16 A

Voltage - Gate Trigger (Vgt) (Max):: 1.3 V

Current - Non Rep. Surge 50, 60Hz (Itsm):: 120A, 126A

Current - Gate Trigger (Igt) (Max):: 20 mA

Current - Hold (Ih) (Max):: 25 mA

Configuration:: Single

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

T1620T-6I FAQ

1.How can I place an order for T1620T-6I through Aetrix?

Please submit a Request for Quotation (RFQ) for T1620T-6I 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 T1620T-6I reliable?

The price and inventory of T1620T-6I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T1620T-6I is usually 5 days.

3.What payment methods are accepted for T1620T-6I?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T1620T-6I transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T1620T-6I?

T1620T-6I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T1620T-6I 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 T1620T-6I?

For technical support, including T1620T-6I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T1620T-6I requirements.

6.How does Aetrix verify that T1620T-6I is sourced from the original manufacturer or authorized distributors?

All T1620T-6I 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 T1620T-6I meets industry standards.

7.What is the process for return or replacement of T1620T-6I?

All T1620T-6I units undergo pre-shipment inspection (PSI). If there is an issue with T1620T-6I, 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 T1620T-6I part is unused and in its original packaging.

Return procedure for T1620T-6I:

1.Submit a request within 90 days.

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

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