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

Infineon Technologies T420N14TOFXPSA1

Name: T420N14TOFXPSA1
Brand: Infineon Technologies
SKU: T420N14TOFXPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T420N14TOFXPSA1

Manufacturer:: Infineon Technologies

Category:: SCRs - Modules

Package:: DO-200AA, A-PUK

Datasheet:: T420N14TOFXPSA1.pdf

Description:: SCR MODULE 1800V 750A DO200AA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

T420N14TOFXPSA1 from Infineon Technologies is a phase-control thyristor designed for high-power AC line commutation in industrial rectifiers, motor drives, and static VAR compensators. It delivers 424 A average on-state current at 85 °C case temperature, 1400 V repetitive peak off-state voltage (V_DRM/V_RRM), and supports 7200 A non-repetitive surge current (t_P = 10 ms, T_vj = 25 °C). Its 125 °C maximum junction temperature and two-sided cooling capability enable robust operation in medium-voltage DC link switching.

For engineers reviewing the T420N14TOFXPSA1 datasheet, T420N14TOFXPSA1 pinout, T420N14TOFXPSA1 application, or T420N14TOFXPSA1 equivalent, key selection criteria include verified gate trigger current (≤200 mA), critical dv/dt rating (1000 V/µs), commutated turn-off time (220 µs typ.), and thermal resistance (0.056 °C/W junction-to-case, two-sided cooling).

Technical Context

This thyristor operates as a semi-controlled power switch in phase-angle controlled AC–DC conversion circuits. Its gate-controlled delay time is ≤4 µs under standard test conditions (i_GM = 1 A, di_G/dt = 1 A/µs), and it maintains stable latching (I_L ≤ 1200 mA) and holding (I_H ≤ 300 mA) behavior across –40 °C to +125 °C operating range.

The device uses a silicon pellet with pressure-contact packaging and features a dual-cathode structure (main cathode + auxiliary cathode) to improve current sharing and thermal distribution. Its on-state characteristic follows v_T = 1.064 + 2.088×10⁻⁴i_T − 0.1031i_T² + 0.03807i_T³ (i_T in A, v_T in V) at T_vj = 125 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM/V_RRM	1400 V - Maximum repetitive blocking voltage in forward/reverse direction, defining AC line voltage compatibility up to 1000 V RMS.
I_TAVM @ T_C = 85 °C	424 A - Continuous average on-state current limit with two-sided heatsink cooling, directly constraining DC output capability in rectifier designs.
I_TSM (10 ms)	7200 A - Non-repetitive surge current rating at 25 °C junction temperature, determining short-circuit withstand in motor-start applications.
(dv_D/dt)_cr	1000 V/µs - Minimum required snubberless dv/dt immunity, enabling direct connection to inductive loads without external RC suppression.
t_q (typ.)	220 µs - Typical commutated turn-off time at full rated current, setting minimum zero-crossing interval for forced-commutated inverters.
R_thJC (two-sided)	0.056 °C/W - Junction-to-case thermal resistance with bidirectional cooling, used to calculate maximum allowable case temperature for given power loss.
I_GT max	200 mA - Maximum gate trigger current required at 25 °C and 12 V anode-cathode voltage, defining driver strength requirements.

Pinout & Package

Package: TO-240AA (isolated stud-mount, pressure-contact Si pellet, two-sided cooling interface). Dimensions and mounting comply with Infineon's "IFBIP D" mechanical specification (see Annex, Page 3). Clamping force: 5–10 kN.

Pin/Terminal	Circuit Role	Design Meaning
Anode (1)	Main power terminal (high-side current path)	Carries full load current into the device; requires insulated mounting when case is electrically active.
Cathode (2)	Main power terminal (low-side current path)	Primary current return path; connects to DC bus negative or transformer center tap in dual-thyristor configurations.
Gate (4)	Control input (trigger signal)	Low-energy gate drive input; flat contact geometry per AMP 60598 standard, compatible with spring-loaded gate clamps.
Auxiliary Cathode (5)	Secondary cathode terminal	Provides parallel current path to reduce localized heating and improve dynamic current sharing during turn-on transients.

Key Features

Feature	Design Value
Two-sided thermal interface	Enables 0.056 °C/W R_thJC, allowing >400 A continuous conduction with passive heatsinking in compact industrial enclosures.
High dv/dt immunity	1000 V/µs critical rate ensures reliable blocking during fast voltage transients in transformer-fed rectifiers without snubbers.
Low on-state slope resistance	0.75 mΩ r_T minimizes conduction loss at high currents-e.g., <2.1 V v_T at 1500 A-reducing thermal stress in 6-pulse bridges.
Fast commutated turn-off	220 µs t_q (typ.) supports 2.3 kHz maximum forced-commutation frequency in cycloconverter topologies.
Robust gate trigger margin	Guaranteed turn-on with ≤200 mA I_GT and ≤2 V V_GT, simplifying low-power isolated gate driver design.

Applications

Industrial Motor Drives

Medium-Voltage Rectifiers

Use Scenario: Phase-controlled speed regulation of wound-rotor induction motors in mining conveyors and steel mill rolling stands.

IC Role / Device Role / Timing Role: Main AC line commutated switch in 3-phase bridge configuration, triggered at variable firing angles to control DC bus voltage.

Use Value: 424 A I_TAVM and 1400 V V_DRM support 690 V AC input systems with 2× safety margin; 7200 A I_TSM withstands motor locked-rotor surges.

Use Scenario: High-efficiency 12-pulse rectification for DC traction substations powering rail networks.

IC Role / Device Role / Timing Role: Thyristor in secondary 6-pulse bridge, synchronized to transformer phase shift for harmonic cancellation.

Use Value: 220 µs t_q enables precise commutation timing between bridges; 0.056 °C/W R_thJC sustains >95% efficiency at 500 kW output with air-cooled heatsinks.

Static VAR Compensators (SVC)

DC Arc Furnace Controllers

Use Scenario: Rapid reactive power compensation in grid substations using thyristor-switched capacitors (TSC) and reactors (TSR).

IC Role / Device Role / Timing Role: Bidirectional switching element in anti-parallel pairs, triggered at voltage zero-crossing to minimize inrush current.

Use Value: 1000 V/µs (dv/dt)_cr prevents false triggering during capacitor switching transients; 300 mA I_H ensures stable conduction during low-current VAR adjustment cycles.

Use Scenario: Electrode current control in 40–100 MVA electric arc furnaces for steel recycling.

IC Role / Device Role / Timing Role: Primary current regulator in primary-side thyristor-controlled transformer tap changers.

Use Value: 960 A I_TRMS rating handles highly distorted furnace currents; pressure-contact package survives mechanical vibration and thermal cycling up to 10⁶ cycles.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TT140N14KOF	Higher I_TAVM (520 A @ 85 °C), same V_DRM (1400 V), but higher R_thJC (0.065 °C/W) and no auxiliary cathode.	Suitable for lower-power density designs where thermal margin exceeds 15 K; lacks auxiliary cathode for asymmetric current sharing.	Select TT140N14KOF only if gate drive energy budget allows higher I_GT (250 mA) and system layout permits larger heatsink footprint.
T420N16TOFXPSA1	Higher V_DRM/V_RRM (1600 V), identical I_TAVM, R_thJC, and pinout; 10% higher (dv/dt)_cr (1100 V/µs).	Required for 1140 V AC line systems or applications demanding extended overvoltage margin beyond IEC 61800-5-1.	Choose T420N16TOFXPSA1 when system transient overvoltage exceeds 1400 V peak or long-term reliability requires >20% voltage derating.

Compared with TT140N14KOF and T420N16TOFXPSA1, T420N14TOFXPSA1 offers optimal balance of thermal performance (0.056 °C/W), gate drive simplicity (200 mA I_GT), and auxiliary cathode-enhanced current sharing-making it preferred for space-constrained, high-dynamic-duty rectifiers.

Availability

T420N14TOFXPSA1 is available at Aetrix Electronics and suitable for industrial motor drives, medium-voltage rectifiers, and static VAR compensators requiring stable component supply, long-lifecycle support, and traceable sourcing for Class A safety-critical systems.

Supply support for T420N14TOFXPSA1 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 infrastructure markets.

T420N14TOFXPSA1 belongs to the "Netz-Thyristor" series, engineered specifically for high-reliability, high-current phase-control applications in utility-scale power conversion and heavy industrial automation.

FAQ

What is the maximum allowable case temperature for continuous operation at 400 A average current?

At 400 A I_TAV and sinusoidal conduction (θ = 180°), the maximum allowable case temperature is 92 °C for two-sided cooling, derived from the TC = f(I_TAV) curve on Page 6 of the datasheet. Exceeding this value risks exceeding the 125 °C T_vj limit due to 0.056 °C/W R_thJC and ~1.8 V on-state drop.

Does T420N14TOFXPSA1 require a heat sink on both sides for rated performance?

Yes. The 0.056 °C/W R_thJC rating applies exclusively to two-sided cooling with 5–10 kN clamping force. Using single-sided cooling increases R_thJC to 0.085 °C/W (anode) or 0.154 °C/W (cathode), reducing I_TAVM by 35–55% at 85 °C case temperature per datasheet Page 2.

Can the auxiliary cathode (Pin 5) be left unconnected in standard rectifier use?

No. Pin 5 must be connected to the main cathode (Pin 2) externally via low-inductance busbar. Leaving it floating causes uneven current distribution during turn-on, increasing localized junction temperature and risking premature failure per thermal modeling in Page 5's Z_thJC curves.

What gate drive voltage and pulse width are required to guarantee turn-on at –40 °C?

At –40 °C, the datasheet specifies V_GT ≤ 2 V and I_GT ≤ 200 mA with 12 V anode-cathode voltage. A minimum 10 V, 20 µs gate pulse (≥2 mJ energy) is recommended to ensure reliable triggering across temperature and aging, as shown in the gate characteristic curve on Page 8.

T420N14TOFXPSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: DO-200AA, A-PUK

Packaging:: Tray

Product Status:: Obsolete

Structure:: Single

Number of SCRs, Diodes:: 1 SCR

Voltage - Off State:: 1.8 kV

Current - On State (It (AV)) (Max):: 424 A

Current - On State (It (RMS)) (Max):: 750 A

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

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

Current - Non Rep. Surge 50, 60Hz (Itsm):: 7200A @ 50Hz

Current - Hold (Ih) (Max):: 300 mA

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Clamp On

T420N14TOFXPSA1 FAQ

1.How can I place an order for T420N14TOFXPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for T420N14TOFXPSA1 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 T420N14TOFXPSA1 reliable?

The price and inventory of T420N14TOFXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T420N14TOFXPSA1 is usually 5 days.

3.What payment methods are accepted for T420N14TOFXPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T420N14TOFXPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T420N14TOFXPSA1?

T420N14TOFXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T420N14TOFXPSA1 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 T420N14TOFXPSA1?

For technical support, including T420N14TOFXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T420N14TOFXPSA1 requirements.

6.How does Aetrix verify that T420N14TOFXPSA1 is sourced from the original manufacturer or authorized distributors?

All T420N14TOFXPSA1 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 T420N14TOFXPSA1 meets industry standards.

7.What is the process for return or replacement of T420N14TOFXPSA1?

All T420N14TOFXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with T420N14TOFXPSA1, 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 T420N14TOFXPSA1 part is unused and in its original packaging.

Return procedure for T420N14TOFXPSA1:

1.Submit a request within 90 days.

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

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