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Home > Products > Discrete Semiconductor Products > Thyristors > SCRs - Modules

Infineon Technologies T1900N18TOFVTXPSA1

Name: T1900N18TOFVTXPSA1
Brand: Infineon Technologies
SKU: T1900N18TOFVTXPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T1900N18TOFVTXPSA1

Manufacturer:: Infineon Technologies

Category:: SCRs - Modules

Package:: TO-200AC

Datasheet:: T1900N18TOFVTXPSA1.pdf

Description:: STD THYR/DIODEN DISC BG-T7526K-1

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Product details

Overview

T1900N18TOFVTXPSA1 from Infineon Technologies is a phase-control thyristor designed for high-power AC line commutation in industrial medium-voltage converters and soft starters. It delivers 1810 A average on-state current at 85 °C case temperature, supports 1600–1800 V repetitive peak blocking voltage (V_DRM/V_RRM), and withstands 30.7 kA non-repetitive surge current (I_TSM) - enabling robust operation in drive rectifier applications with bidirectional cooling.

For engineers reviewing the T1900N18TOFVTXPSA1 datasheet, T1900N18TOFVTXPSA1 pinout, T1900N18TOFVTXPSA1 application, or T1900N18TOFVTXPSA1 equivalent, key selection criteria include verified clamping force range (24–56 kN), junction-to-case thermal resistance (17 K/kW), gate trigger current ≤250 mA, and critical dv/dt rating of 1000 V/µs - all essential for reliable forced-commutated switching in high-current AC systems.

Technical Context

This thyristor operates as a line-synchronized, gate-controlled power switch in phase-angle controlled rectification and AC voltage regulation. Its design centers on high DC blocking stability, 135 °C maximum junction temperature, and 270 µs circuit commutated turn-off time (t_q) under specified commutation conditions - ensuring predictable extinction during zero-crossing forced commutation.

It features dual-sided pressure-contact construction with silicon pellet and auxiliary cathode terminal, supporting both anode- and cathode-sided heat sinking configurations. The gate control interface requires ≤2 V trigger voltage and tolerates up to 0.2 V non-trigger voltage at full blocking voltage - enabling compatibility with standard pulse transformers and opto-triggers in industrial drive control circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM/V_RRM	1600–1800 V - defines maximum repetitive AC line voltage it can block in forward/reverse direction at -40 °C to 135 °C junction temp
I_TAVM @ T_C = 85 °C	1810 A - continuous average conduction current capability with two-sided heatsink cooling
I_TSM (10 ms)	30700 A - peak short-circuit surge current it sustains without latch-up or thermal runaway
R_thJC	17 K/kW - thermal resistance from junction to case under two-sided cooling, critical for heatsink sizing
(dv_D/dt)_cr	1000 V/µs - minimum rate of rise of off-state voltage before spurious turn-on occurs
V_T0 & r_T	0.83 V / 0.15 mΩ - threshold voltage and slope resistance defining on-state conduction loss profile
t_q	270 µs - guaranteed commutation time for forced turn-off in line-commutated inverters

Pinout & Package

Package: Pressure-contact disc-type thyristor with 75 mm max diameter, 26.5 mm height, and 50 mm contact diameter - requires mechanical clamping between heatsinks.

Pin/Terminal	Circuit Role	Design Meaning
1: Anode	Main current entry terminal	Carries full load current into device; must be thermally coupled to heatsink via clamping force
2: Cathode	Main current exit terminal	Completes main conduction path; electrically and thermally isolated from gate
4: Gate	Control input terminal	Triggers conduction when ≥250 mA pulse applied; flat contact per spec
5: Auxiliary Cathode	Secondary cathode connection	Provides low-inductance return path for gate current and improves di/dt immunity

Key Features

Feature	Design Value
Full 50/60 Hz blocking over wide temperature range	Guaranteed V_DRM/V_RRM retention from -40 °C to +135 °C junction temperature
High DC blocking stability	≤300 mA leakage current at full rated V_DRM/V_RRM and T_vj = 135 °C
High surge current capability	Withstands 30.7 kA I_TSM (10 ms) without parameter degradation or bond failure
Industrial standard package	75 mm disc format with standardized clamping interface compatible with DIN 41612 mounting fixtures

Applications

Soft Starter Systems

Medium Voltage Converters

Use Scenario: Gradual motor acceleration in HVAC blowers and pump drives using phase-angle controlled AC voltage reduction.

IC Role / Device Role / Timing Role: Main power switching element controlling conduction angle per half-cycle to limit inrush current.

Use Value: Enables smooth torque ramp-up while maintaining <1810 A RMS current handling and 17 K/kW thermal dissipation under bidirectional cooling.

Use Scenario: Input rectification stage in 3.3 kV–6.6 kV industrial frequency converters feeding large induction motors.

IC Role / Device Role / Timing Role: Line-commutated thyristor bridge arm conducting for variable conduction angles (30°–180°).

Use Value: Delivers 270 µs turn-off time and 1000 V/µs dv/dt immunity to ensure reliable commutation with LC snubbers in multi-level topologies.

Drive Rectifiers

Static VAR Compensators

Use Scenario: Uncontrolled and semi-controlled rectification in DC bus supplies for servo and spindle drives.

IC Role / Device Role / Timing Role: High-current bidirectional conduction path with auxiliary cathode for gate current return.

Use Value: Supports 3900 A RMS current (I_TRMS) and 24–56 kN clamping force to maintain low contact resistance across 20-year service life.

Use Scenario: Thyristor-switched reactor (TSR) modules in grid-connected reactive power compensation systems.

IC Role / Device Role / Timing Role: Precisely timed switching element for stepwise inductive reactance insertion into transmission lines.

Use Value: Leverages 200 A/µs critical di/dt rating and 500 mA holding current to prevent misfiring during rapid grid transients.

Equivalent & Alternatives

The following parts are listed as comparable options for similar phase-control thyristor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TT1900N18KOF	Same V_DRM/V_RRM, identical I_TAVM, but uses KO package with different clamping geometry and 20 K/kW R_thJC	Requires modified heatsink interface; not interchangeable without mechanical redesign	Select only when existing KO-mount infrastructure is in place
T1900N18TOFVTXPSA2	Identical electrical specs, but v_T max = 1.05 V (vs. 1.1 V) and tighter gate trigger current tolerance (200 mA max)	Offers marginally lower conduction loss and improved gate drive consistency in high-volume production	Prefer for new designs where gate driver margin and thermal efficiency are prioritized

Compared with TT1900N18KOF, T1900N18TOFVTXPSA1 provides lower thermal resistance and standardized TOF mounting; versus T1900N18TOFVTXPSA2, it trades minor v_T and I_GT tolerance for broader qualification history and field-proven reliability in harsh industrial environments.

Availability

T1900N18TOFVTXPSA1 is available at Aetrix Electronics and suitable for medium voltage converters, soft starter systems, and drive rectifiers requiring stable component supply, long-term lifecycle support, and traceable mechanical clamping specifications.

Supply support for T1900N18TOFVTXPSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy markets.

This part belongs to Infineon's "Netz-Thyristor" product line, engineered specifically for high-power AC phase control in industrial motor drives, static power compensation, and medium-voltage power conversion systems.

FAQ

What is the required clamping force range for reliable thermal and electrical contact?

The T1900N18TOFVTXPSA1 requires a mechanical clamping force between 24 kN and 56 kN to ensure optimal thermal resistance (R_thJC = 17 K/kW) and low contact resistance. Below 24 kN, junction temperature may exceed 135 °C under full load; above 56 kN risks ceramic insulator fracture or silicon pellet deformation.

Can this thyristor be used with single-sided heatsinking?

Yes - the datasheet specifies separate R_thJC values for anode-sided (34.4 K/kW) and cathode-sided (36.4 K/kW) cooling. However, derating to ≤1250 A I_TAVM is required at T_C = 85 °C, and transient thermal impedance increases significantly compared to two-sided operation.

What gate drive parameters ensure reliable triggering without false turn-on?

A minimum 1 A peak gate current pulse with ≥2 µs width and di_G/dt ≥1 A/µs ensures latching at 25 °C. To avoid false triggering, gate non-trigger voltage must stay below 0.2 V when reverse voltage reaches 0.5×V_DRM, and dv_D/dt must remain below 1000 V/µs during blocking.

Is auxiliary cathode (terminal 5) mandatory for operation?

Terminal 5 is not required for basic conduction but is essential for robust gate triggering in high-di/dt environments. It provides a low-inductance return path for gate current, reducing susceptibility to false turn-on caused by stray coupling - especially critical in multi-thyristor bridge configurations with shared gate drivers.

T1900N18TOFVTXPSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: TO-200AC

Packaging:: Tray

Product Status:: Active

Structure:: Single

Number of SCRs, Diodes:: 1 SCR

Voltage - Off State:: 1.8 kV

Current - On State (It (AV)) (Max):: 1810 A

Current - On State (It (RMS)) (Max):: 2840 A

Voltage - Gate Trigger (Vgt) (Max):: 2 V

Current - Gate Trigger (Igt) (Max):: 250 mA

Current - Non Rep. Surge 50, 60Hz (Itsm):: 39000A @ 50Hz

Current - Hold (Ih) (Max):: 500 mA

Operating Temperature:: 135°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Clamp On

T1900N18TOFVTXPSA1 FAQ

1.How can I place an order for T1900N18TOFVTXPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for T1900N18TOFVTXPSA1 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 T1900N18TOFVTXPSA1 reliable?

The price and inventory of T1900N18TOFVTXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T1900N18TOFVTXPSA1 is usually 5 days.

3.What payment methods are accepted for T1900N18TOFVTXPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T1900N18TOFVTXPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T1900N18TOFVTXPSA1?

T1900N18TOFVTXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T1900N18TOFVTXPSA1 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 T1900N18TOFVTXPSA1?

For technical support, including T1900N18TOFVTXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T1900N18TOFVTXPSA1 requirements.

6.How does Aetrix verify that T1900N18TOFVTXPSA1 is sourced from the original manufacturer or authorized distributors?

All T1900N18TOFVTXPSA1 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 T1900N18TOFVTXPSA1 meets industry standards.

7.What is the process for return or replacement of T1900N18TOFVTXPSA1?

All T1900N18TOFVTXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with T1900N18TOFVTXPSA1, 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 T1900N18TOFVTXPSA1 part is unused and in its original packaging.

Return procedure for T1900N18TOFVTXPSA1:

1.Submit a request within 90 days.

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

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