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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics TPDV840RG

Name: TPDV840RG
Brand: STMicroelectronics
SKU: TPDV840RG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPDV840RG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TOP-3

Datasheet:: TPDV840RG.pdf

Description:: TRIAC ALTERNISTOR 800V 40A TOP3

Quantity:: RFQ Add To RFQ list

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Inventory:88

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Product details

Overview

TPDV840RG from STMicroelectronics is a 40 A RMS insulated triac in TOP3 package, rated for 800 V repetitive peak off-state voltage (VDRM/VRRM), with 200 mA gate trigger current (IGT) and 500 V/µs noise immunity. It delivers high commutation robustness (142 A/ms at 10 V/µs) for controlling inductive loads in three-phase motor starters and heating systems.

For engineers reviewing the TPDV840RG datasheet, TPDV840RG pinout, TPDV840RG application, or TPDV840RG equivalent, this part supports reliable phase-angle control in industrial AC power circuits where high dI/dt immunity, galvanic isolation, and surge resilience are required.

Technical Context

This alternistor-based triac operates across all four quadrants (I–III) with symmetrical triggering behavior. Its 142 A/ms critical rate of rise of on-state current (dI/dt)_c at 10 V/µs and 500 V/µs dV/dt immunity enable stable switching in noisy three-phase inductive environments without false turn-on.

Thermal performance is defined by R_th(j–c) ≤ 0.9 °C/W (AC, 50 Hz, 360° conduction) and junction temperature range of –40 to +125 °C, supporting continuous operation under high ambient conditions when mounted on heatsinks per specified torque (1.05 N·m).

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	40 A - Sustained load current capability at T_c = 75 °C, defining thermal design margin for heatsink sizing
VDRM / VRRM	800 V - Maximum repetitive blocking voltage across A1–A2, suitable for 400 VAC three-phase line applications
IGT	200 mA - Peak gate current required to reliably trigger conduction in all quadrants
(dI/dt)_c	142 A/ms at 10 V/µs - Critical commutation rating ensuring turn-on stability under fast-rising inductive currents
dV/dt immunity	500 V/µs - Minimum rate of off-state voltage rise tolerated without spurious conduction
V_TM	1.8 V max at 56 A - On-state voltage drop determining conduction losses and thermal dissipation
R_th(j–c)	0.9 °C/W (AC) - Junction-to-case thermal resistance used to calculate case temperature under load

Pinout & Package

TPDV840RG uses the insulated TOP3 package (UL E81734 recognized), with creepage/clearance optimized for reinforced insulation up to 2500 V_rms. Terminals are arranged as A2 (anode 2), A1 (anode 1), and G (gate) on the same side of the molded body.

Pin/Terminal	Circuit Role	Design Meaning
A2	Anode 2 (main terminal)	High-side connection point for AC line or load return; referenced to A1 for bidirectional conduction
A1	Anode 1 (main terminal)	Low-side connection point; forms main current path with A2 during both half-cycles
G	Gate	Control input requiring ≥200 mA pulse to initiate conduction in any quadrant; referenced to A1

Key Features

Feature	Design Value
Insulated package	2500 V_rms isolation (UL E81734), enabling direct mounting on metal chassis without additional barrier
High commutation robustness	142 A/ms (dI/dt)_c at 10 V/µs ensures reliable turn-on under fast-rising inductive transients
Three-quadrant triggering	Guaranteed IGT ≤ 200 mA in Quadrants I, II, and III supports flexible phase-control drive circuitry
Enhanced noise immunity	500 V/µs dV/dt rating prevents false triggering in electrically noisy industrial environments

Applications

Heating System Control

Motor Starter

Use Scenario: Solid-state replacement of contactors in industrial resistive heating banks fed from three-phase 400 VAC supply.

IC Role / Device Role / Timing Role: Alternistor triac performing phase-angle AC power regulation to maintain precise temperature setpoints.

Use Value: Eliminates mechanical wear and contact arcing while sustaining 40 A RMS load current with 800 V blocking margin.

Use Scenario: Soft-start sequencing for three-phase induction motors in HVAC blowers and pumps.

IC Role / Device Role / Timing Role: Bidirectional switching element controlling voltage ramp-up via synchronized gate firing.

Use Value: Enables controlled inrush current limiting using 142 A/ms dI/dt capability and 590 A non-repetitive surge rating.

Induction Motor Speed Control

Industrial Fan Drive

Use Scenario: Variable-speed control of three-phase induction motors in conveyor systems and compressors.

IC Role / Device Role / Timing Role: High-reliability power switch in phase-controlled AC drive stage interfacing with microcontroller-based timing logic.

Use Value: Maintains stable conduction under high di/dt transients from motor back-EMF with 500 V/µs noise immunity.

Use Scenario: Energy-efficient airflow regulation in commercial kitchen exhaust hoods and data center cooling units.

IC Role / Device Role / Timing Role: Isolated triac delivering galvanically separated gate control for fan motor power stages.

Use Value: 2500 V_rms insulation allows safe integration into grounded metal enclosures without extra isolation components.

Equivalent & Alternatives

The following parts are listed as comparable options for similar triac-based AC power control applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTB24-800CW	40 A RMS, 800 V VDRM, but non-insulated TO-220AB package (no 2500 V_rms isolation)	Requires external isolation barrier for chassis-mount safety compliance	Select when cost-sensitive designs can accommodate added isolation components and PCB space
Q6040JH4	40 A RMS, 800 V VDRM, insulated TO-220 package with 2500 V_rms, but lower dI/dt rating (100 A/ms)	Suitable for less demanding inductive loads where 142 A/ms commutation is not required	Choose when thermal footprint is constrained and full TPDV840RG commutation headroom is unnecessary

Compared with BTB24-800CW and Q6040JH4, TPDV840RG uniquely combines 2500 V_rms insulation, 142 A/ms dI/dt capability, and three-quadrant triggering-making it optimal for compact, safety-certified, high-noise three-phase motor and heating controls.

Availability

TPDV840RG is available at Aetrix Electronics and suitable for heating system control, motor starter implementation, and induction motor speed control requiring stable component supply and long-term industrial lifecycle support.

Supply support for TPDV840RG 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, MCU, and sensor solutions for industrial, automotive, and consumer markets.

TPDV840RG belongs to the TPDVxx40 alternistor triac family, engineered specifically for robust, isolated AC power control in three-phase inductive load applications including motor drives and industrial heating.

FAQ

What is the maximum allowable case temperature for continuous operation?

The TPDV840RG supports continuous operation with case temperature (T_c) up to 75 °C for its full 40 A RMS rating. Derating begins above that point, and maximum junction temperature remains limited to +125 °C. Thermal design must ensure R_th(j–c) ≤ 0.9 °C/W (AC) is maintained with appropriate heatsinking and mounting torque (1.05 N·m).

Does TPDV840RG require a snubber circuit in motor control applications?

A snubber is recommended for inductive loads exceeding 100 mH or where dV/dt exceeds 500 V/µs. While the device's intrinsic 500 V/µs immunity reduces snubber dependency, STMicroelectronics' application note AN4375 specifies RC snubber values based on load L/R ratio and operating frequency to ensure reliable commutation in motor starter configurations.

Can TPDV840RG be used in single-phase applications?

Yes-TPDV840RG is fully compatible with single-phase 230 VAC or 400 VAC systems. Its 800 V VDRM provides sufficient margin for 400 VAC three-phase line-to-line operation and 230 VAC line-to-neutral use. Gate drive requirements and thermal design remain identical regardless of phase count.

Is the TOP3 package lead-free and RoHS compliant?

Yes-TPDV840RG is supplied in an ECOPACK-compliant insulated TOP3 package with lead-free plating and halogen-free molding compound meeting UL94 V0. It conforms to RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with full material declarations available via ST's product change notification system.

TPDV840RG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TOP-3

Packaging:: Tube

Product Status:: Active

Triac Type:: Alternistor - Snubberless

Voltage - Off State:: 800 V

Current - On State (It (RMS)) (Max):: 40 A

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

Current - Non Rep. Surge 50, 60Hz (Itsm):: 350A, 370A

Current - Gate Trigger (Igt) (Max):: 200 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:: TOP3

TPDV840RG FAQ

1.How can I place an order for TPDV840RG through Aetrix?

Please submit a Request for Quotation (RFQ) for TPDV840RG 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 TPDV840RG reliable?

The price and inventory of TPDV840RG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPDV840RG is usually 5 days.

3.What payment methods are accepted for TPDV840RG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPDV840RG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPDV840RG?

TPDV840RG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPDV840RG 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 TPDV840RG?

For technical support, including TPDV840RG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPDV840RG requirements.

6.How does Aetrix verify that TPDV840RG is sourced from the original manufacturer or authorized distributors?

All TPDV840RG 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 TPDV840RG meets industry standards.

7.What is the process for return or replacement of TPDV840RG?

All TPDV840RG units undergo pre-shipment inspection (PSI). If there is an issue with TPDV840RG, 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 TPDV840RG part is unused and in its original packaging.

Return procedure for TPDV840RG:

1.Submit a request within 90 days.

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

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