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

Infineon Technologies T901N32TOFXPSA1

Name: T901N32TOFXPSA1
Brand: Infineon Technologies
SKU: T901N32TOFXPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T901N32TOFXPSA1

Manufacturer:: Infineon Technologies

Category:: SCRs - Modules

Package:: TO-200AC

Datasheet:: T901N32TOFXPSA1.pdf

Description:: SCR MODULE 3600V 29900A DO200AE

Quantity:: RFQ Add To RFQ list

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Inventory:9,463

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Product details

Overview

T901N32TOFXPSA1 from Infineon Technologies is a phase-control thyristor designed for medium-voltage AC power switching in industrial drive rectifiers and soft starters. It delivers 940 A average on-state current at 85°C case temperature, 3200–3600 V repetitive peak off-state voltage, and withstands 19,000 A surge current (10 ms, 25°C), enabling robust operation in crowbar and load-commutating inverter applications.

For engineers reviewing the T901N32TOFXPSA1 datasheet, T901N32TOFXPSA1 pinout, T901N32TOFXPSA1 application, or T901N32TOFXPSA1 equivalent, key selection criteria include verified di/dt capability (300 A/µs), clamping force range (15–24 kN), thermal resistance (17.0 K/kW junction-to-case), and gate trigger sensitivity (≤350 mA).

Technical Context

This thyristor employs pressure-contact silicon pellet construction with dual-sided cooling capability and is rated for full 50/60 Hz blocking across –40°C to +125°C junction temperature. Its high di/dt (300 A/µs) and dv/dt (1000 V/µs) ratings support fast-switching, commutation-critical topologies such as load-commutated inverters and medium-voltage drives.

The device features a low on-state voltage drop (1.16 V threshold, 0.494 mΩ slope resistance at max Tj), enabling efficient conduction at high RMS currents (1480 A), while its 300 µs typical turn-off time (tq) and 7.5 mAs recovered charge (Qr) are optimized for circuit-commutated forced commutation schemes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM/V_RRM	3200–3600 V - ensures reliable 3.3 kV AC system blocking under transient overvoltage conditions
I_TAVM	940 A @ T_C=85°C - defines continuous DC or RMS conduction capacity in heatsink-cooled industrial rectifiers
I_TSM	19,000 A (10 ms, 25°C) - supports short-circuit fault ride-through in motor drive front-ends
(di/dt)_cr	300 A/µs - enables reliable turn-on without spurious triggering in high-di/dt inverter legs
R_thJC	17.0 K/kW - quantifies thermal bottleneck between junction and heatsink for two-sided cooling configuration
v_T0 / r_T	1.16 V / 0.494 mΩ - determines conduction loss profile and forward voltage drop at 1200 A operating point
Clamping Force	15–24 kN - specifies mechanical assembly torque requirement to maintain low contact resistance and thermal interface integrity

Pinout & Package

Package: Disc-type, double-sided cooled, stud-mount thyristor with 76 mm maximum diameter, 50 mm contact diameter, and 26 mm height. Requires controlled mechanical clamping for thermal and electrical integrity.

Pin/Terminal	Circuit Role	Design Meaning
Anode (1)	Main current terminal (high-side power path)	Carries full load current into device; must be thermally coupled to heatsink via stud mounting
Cathode (2)	Main current terminal (low-side return path)	Completes main conduction loop; electrically and thermally connected to second heatsink surface
Gate (4)	Control input for turn-on initiation	Receives ≥3 A pulse (20 µs min) to trigger conduction; sensitive to noise due to 350 mA max I_GT
Hilfskathode (5)	Secondary cathode terminal (control reference)	Provides dedicated low-inductance gate return path independent of main cathode current path

Key Features

Feature	Design Value
Full 50/60 Hz blocking stability	Maintains V_DRM/V_RRM integrity across –40°C to +125°C junction temperature range
High surge current capability	Withstands 19,000 A (10 ms) without latch-up or permanent degradation
High di/dt turn-on immunity	Guarantees clean triggering up to 300 A/µs without false turn-on in noisy drive environments
Two-sided thermal interface	Enables 17.0 K/kW R_thJC when both anode and cathode surfaces are actively cooled
Pressure-contact Si pellet	Eliminates wire bonds and solder interfaces, improving long-term thermal cycling reliability

Applications

Soft Starter Systems

Medium-Voltage Drive Rectifiers

Use Scenario: Controlled ramp-up of induction motor voltage during startup to limit inrush current.

IC Role / Device Role / Timing Role: Main power switch in back-to-back anti-parallel thyristor arrangement for AC phase-angle control.

Use Value: Enables precise voltage ramping using gate-trigger delay timing, reducing mechanical stress on gearboxes and belts.

Use Scenario: AC-to-DC conversion stage in 3.3 kV industrial variable-frequency drives.

IC Role / Device Role / Timing Role: High-current, high-voltage rectifying element in six-pulse or twelve-pulse bridge configurations.

Use Value: Delivers 940 A continuous conduction with <1.75 V on-state drop, minimizing thermal losses in air- or liquid-cooled enclosures.

Crowbar Protection Circuits

Load-Commutated Inverters (LCI)

Use Scenario: Fast-acting short-circuit bypass during generator or exciter fault conditions.

IC Role / Device Role / Timing Role: High-energy crowbar switch triggered by overvoltage detection to divert rotor current.

Use Value: Withstands 19,000 A surge and recovers within 300 µs, ensuring protection coordination with upstream breakers.

Use Scenario: Inverter stage in synchronous motor drives where load inductance provides commutation.

IC Role / Device Role / Timing Role: Main switching element turned off by natural current zero-crossing assisted by load inductance.

Use Value: Low Q_r (7.5 mAs) and controlled tq (300 µs typ.) enable stable commutation without snubbers in high-power LCI topologies.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TT901N32KOFXPSA1	Same die, but with enhanced gate sensitivity (IGT ≤ 250 mA) and tighter vT0 tolerance (1.0–1.12 V)	Better suited for low-energy gate drivers and digitally controlled soft starters with marginal trigger margin	Select when gate drive power budget is constrained or digital timing resolution demands lower trigger variability
T901N36TOFXPSA1	Higher VDRM/VRRM (3600–4000 V), identical ITAVM and thermal specs	Required for 3.6 kV+ grid-tied systems or applications with elevated transient overvoltage stress	Select when system insulation coordination requires >3.4 kV blocking margin per device

Compared with TT901N32KOFXPSA1 and T901N36TOFXPSA1, the T901N32TOFXPSA1 balances cost, gate drive simplicity, and 3.2–3.6 kV system compatibility-making it optimal for standard 3.3 kV industrial drives and soft starters where gate energy and voltage margin are well-bounded.

Availability

T901N32TOFXPSA1 is available at Aetrix Electronics and suitable for soft starter systems, medium-voltage drive rectifiers, crowbar protection circuits, and load-commutated inverters requiring stable component supply and long-lifecycle industrial support.

Supply support for T901N32TOFXPSA1 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 applications.

This part belongs to Infineon's high-power "T901N" series of phase-control thyristors engineered for medium-voltage industrial power conversion, emphasizing ruggedness, thermal stability, and commutation reliability in drive and protection systems.

FAQ

What is the recommended clamping force range for T901N32TOFXPSA1 installation?

The device requires a mechanical clamping force between 15 kN and 24 kN to ensure low thermal resistance and stable electrical contact across the pressure-contact silicon pellet. Under-torque risks increased R_thJC and localized heating; over-torque may deform the housing or damage internal contacts. Use calibrated torque tools and follow Infineon's mounting procedure in Application Note AN2011-05.

Can T901N32TOFXPSA1 be used in single-sided cooled configurations?

Yes, but with derated performance: R_thJC increases to 30.5 K/kW (anode-cooled) or 38.5 K/kW (cathode-cooled), reducing allowable I_TAVM by ~25% at 85°C case temperature. Dual-sided cooling is strongly preferred to achieve the rated 940 A and maintain safe junction temperatures under continuous load.

What gate drive parameters are required to reliably trigger T901N32TOFXPSA1?

A minimum gate trigger current of 3 A (with di/dt ≥ 6 A/µs) and pulse width ≥ 20 µs is required for guaranteed turn-on. Gate voltage must not exceed 2.5 V (V_GT max), and non-triggering gate voltage must stay below 0.4 V under 0.5×V_DRM. A low-inductance gate loop and isolated pulse transformer or optocoupler driver are recommended for noise immunity.

How does the 300 µs typical turn-off time (tq) impact inverter design?

The 300 µs tq defines the minimum commutation interval needed before reapplied voltage exceeds 0.67×V_DRM. In load-commutated inverters, this constrains maximum operating frequency and requires sufficient load inductance to sustain current flow during turn-off. Designers must verify that circuit commutation time exceeds tq by ≥2× margin to prevent commutation failure under worst-case temperature and current conditions.

T901N32TOFXPSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: TO-200AC

Packaging:: Tray

Product Status:: Obsolete

Structure:: Single

Number of SCRs, Diodes:: 1 SCR

Voltage - Off State:: 3.6 kV

Current - On State (It (AV)) (Max):: 1900 A

Current - On State (It (RMS)) (Max):: 29900 A

Voltage - Gate Trigger (Vgt) (Max):: 2.5 V

Current - Gate Trigger (Igt) (Max):: 350 mA

Current - Non Rep. Surge 50, 60Hz (Itsm):: 44000A @ 50Hz

Current - Hold (Ih) (Max):: 350 mA

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Clamp On

T901N32TOFXPSA1 FAQ

1.How can I place an order for T901N32TOFXPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for T901N32TOFXPSA1 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 T901N32TOFXPSA1 reliable?

The price and inventory of T901N32TOFXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T901N32TOFXPSA1 is usually 5 days.

3.What payment methods are accepted for T901N32TOFXPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T901N32TOFXPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T901N32TOFXPSA1?

T901N32TOFXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T901N32TOFXPSA1 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 T901N32TOFXPSA1?

For technical support, including T901N32TOFXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T901N32TOFXPSA1 requirements.

6.How does Aetrix verify that T901N32TOFXPSA1 is sourced from the original manufacturer or authorized distributors?

All T901N32TOFXPSA1 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 T901N32TOFXPSA1 meets industry standards.

7.What is the process for return or replacement of T901N32TOFXPSA1?

All T901N32TOFXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with T901N32TOFXPSA1, 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 T901N32TOFXPSA1 part is unused and in its original packaging.

Return procedure for T901N32TOFXPSA1:

1.Submit a request within 90 days.

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

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