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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics TPDV1225RG

Name: TPDV1225RG
Brand: STMicroelectronics
SKU: TPDV1225RG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPDV1225RG

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TOP-3

Datasheet:: TPDV1225RG.pdf

Description:: TRIAC ALTERNISTOR 1.2KV 25A TOP3

Quantity:: RFQ Add To RFQ list

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Inventory:499

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Product details

Overview

TPDV1225RG from STMicroelectronics is a 25 A RMS insulated triac in TOP3 package, rated for 1200 V repetitive blocking voltage and 150 mA gate trigger current. It employs high-performance alternistor technology to support robust commutation (88 A/ms at 10 V/μs) and noise immunity (2 kV/μs), enabling reliable phase-angle control in three-phase motor starters and heating systems.

For engineers reviewing the TPDV1225RG datasheet, TPDV1225RG pinout, TPDV1225RG application, or TPDV1225RG equivalent, this device is selected for high-surge, inductive-load switching where dI/dt capability (>20 A/ms), low on-state voltage (≤1.8 V), and reinforced insulation (2500 V_rms) are critical design requirements.

Technical Context

This triac operates in all four quadrants with guaranteed I_GT ≤150 mA and V_GT ≤1.5 V across I–II–III. Its dV/dt immunity exceeds 2000 V/μs at 125 °C, and critical turn-off dI/dt is rated ≥20 A/ms under 200 V/μs stress - enabling stable operation in noisy industrial AC line environments.

The device features low dynamic resistance (R_D ≤19 mΩ) and low on-state voltage (V_TO ≤1.1 V at 125 °C), minimizing conduction losses in continuous 50 Hz power control. Junction-to-case thermal resistance is 1.1 °C/W (AC, 360° conduction), supporting high-power density mounting on heatsinks.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	25 A - Sustains continuous load current without derating at T_c = 85 °C
VDRM/VRRM	1200 V - Blocks full 3-phase line-to-line voltage (e.g., 690 V AC systems with safety margin)
IGT	150 mA - Gate drive compatible with standard microcontroller GPIO or optocoupler outputs
(dI/dt)_c	88 A/ms at 10 V/μs - Supports fast turn-off of highly inductive loads like induction motors
V_INS	2500 V_rms/1 min - Reinforced insulation meets UL E81734 for isolation-critical industrial controls
R_th(j-c)	1.1 °C/W (AC) - Enables thermal management with compact heatsink designs in motor starter PCBs
V_TM	≤1.8 V at 35 A - Limits conduction loss to <63 W at peak current, reducing thermal stress

Pinout & Package

TPDV1225RG uses the insulated TOP3 package (UL recognized E81734), featuring creepage/clearance optimized for 2500 V_rms isolation between terminals and case. Mounting torque: 1.05 N·m (max 1.2 N·m).

Pin/Terminal	Circuit Role	Design Meaning
A1	Main terminal 1 (anode 1)	Primary current path input; referenced to gate for triggering in Quadrants I/II
A2	Main terminal 2 (anode 2)	Current return path; polarity reversal relative to A1 defines quadrant operation
G	Gate	Controls conduction onset; requires ≥150 mA pulse for reliable turn-on across all quadrants

Key Features

Feature	Design Value
Alternistor architecture	Enables high commutation robustness (88 A/ms) without external snubbers in motor control
2500 V_rms insulation	Eliminates need for additional isolation barriers in panel-mounted motor starters
2000 V/μs dV/dt immunity	Prevents false triggering from line transients in industrial 3-phase distribution
Low V_TO (1.1 V)	Reduces power dissipation by ~25% vs. legacy triacs at same RMS current
ECOPACK compliance	Lead-free plating and halogen-free molding compound meet RoHS and UL94 V0 requirements

Applications

Heating System Control

Motor Starter

Use Scenario: Phase-angle controlled power delivery to resistive heating elements in industrial ovens.

IC Role / Device Role / Timing Role: Main power switch regulating RMS voltage applied to heater coils via zero-crossing or phase-triggered firing.

Use Value: High surge rating (390 A non-repetitive) handles cold-resistance inrush without failure.

Use Scenario: Solid-state replacement for electromechanical contactors in HVAC blower motor circuits.

IC Role / Device Role / Timing Role: Bidirectional AC switch enabling soft-start and overload-protected motor energization.

Use Value: 88 A/ms commutation capability ensures clean turn-off during inductive flyback without snubber networks.

Induction Motor Speed Control

Three-Phase Power Controller

Use Scenario: Voltage-controlled speed regulation for single-phase induction fans in commercial HVAC units.

IC Role / Device Role / Timing Role: Triac-based phase-control element in back-to-back configuration per phase leg.

Use Value: 2 kV/μs noise immunity prevents misfiring from motor commutation spikes.

Use Scenario: Modular power stage in programmable logic controller (PLC) output modules driving 3-phase loads.

IC Role / Device Role / Timing Role: Isolated main switching device per phase, interfaced via optocoupled gate drivers.

Use Value: UL-recognized 2500 V_rms insulation enables direct integration into safety-rated PLC chassis.

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
BTB16-800CW	16 A RMS, 800 V V_DRM, non-insulated TO-220 package	Lacks reinforced insulation; requires external isolation for safety-critical mounting	Select when cost-sensitive, lower-current (<16 A), and board-level isolation is already implemented
Q6025LH4	25 A RMS, 600 V V_DRM, insulated TO-220 package, lower dI/dt (50 A/ms)	Insufficient blocking voltage for 400 V+ three-phase systems; reduced commutation margin	Use only in single-phase 240 V AC applications with moderate inductance

Compared with BTB16-800CW and Q6025LH4, TPDV1225RG uniquely combines 1200 V blocking, 25 A RMS, 2500 V_rms insulation, and 88 A/ms commutation - making it the only option qualified for safety-isolated, high-voltage three-phase motor control without auxiliary protection.

Availability

TPDV1225RG is available at Aetrix Electronics and suitable for heating system control, motor starter design, and three-phase power controller development requiring stable component supply and long-term industrial lifecycle support.

Supply support for TPDV1225RG 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.

TPDV1225RG belongs to the TPDVxx25 series of insulated alternistor triacs, engineered specifically for high-reliability, high-commutation AC power control in three-phase industrial equipment.

FAQ

What is the maximum junction temperature for continuous operation?

The TPDV1225RG has an operating junction temperature range of –40 °C to +125 °C. Continuous operation at T_j = 125 °C is permitted only when case temperature remains ≤85 °C and thermal design maintains R_th(j-c) ≤1.1 °C/W under 360° conduction at 50 Hz.

Does this triac require a heat sink in typical motor starter applications?

Yes - a properly sized heat sink is mandatory. At 25 A RMS and 50 Hz, power dissipation exceeds 45 W. With R_th(j-c) = 1.1 °C/W, even a 20 °C ambient rise above case would exceed T_j limits without thermal management.

Can TPDV1225RG be used in zero-crossing switching mode?

No - it is optimized for phase-angle control. Its high dV/dt immunity and alternistor structure support reliable triggered turn-on mid-cycle, but zero-crossing operation requires dedicated zero-crossing triacs with integrated detection circuitry not present here.

Is the TOP3 package lead-free and RoHS compliant?

Yes - the TPDV1225RG uses ST's ECOPACK package: lead-free plating, halogen-free molding compound meeting UL94 V0, and fully compliant with EU RoHS Directive 2011/65/EU and REACH regulations.

TPDV1225RG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TOP-3

Packaging:: Tube

Product Status:: Active

Triac Type:: Alternistor - Snubberless

Voltage - Off State:: 1.2 kV

Current - On State (It (RMS)) (Max):: 25 A

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

Current - Non Rep. Surge 50, 60Hz (Itsm):: 230A, 250A

Current - Gate Trigger (Igt) (Max):: 150 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

TPDV1225RG FAQ

1.How can I place an order for TPDV1225RG through Aetrix?

Please submit a Request for Quotation (RFQ) for TPDV1225RG 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 TPDV1225RG reliable?

The price and inventory of TPDV1225RG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPDV1225RG is usually 5 days.

3.What payment methods are accepted for TPDV1225RG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPDV1225RG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPDV1225RG?

TPDV1225RG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPDV1225RG 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 TPDV1225RG?

For technical support, including TPDV1225RG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPDV1225RG requirements.

6.How does Aetrix verify that TPDV1225RG is sourced from the original manufacturer or authorized distributors?

All TPDV1225RG 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 TPDV1225RG meets industry standards.

7.What is the process for return or replacement of TPDV1225RG?

All TPDV1225RG units undergo pre-shipment inspection (PSI). If there is an issue with TPDV1225RG, 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 TPDV1225RG part is unused and in its original packaging.

Return procedure for TPDV1225RG:

1.Submit a request within 90 days.

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

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