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Infineon Technologies T4771N22TOFXPSA1
- Part No.:
- T4771N22TOFXPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- SCRs - Modules
- Package:
- TO-200AF
- Datasheet:
-
T4771N22TOFXPSA1.pdf
- Description:
- SCR MODULE 2900V 6820A DO200AE
- Quantity:
- Payment:
- Shipping:
Inventory:9,746
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Product details
Overview
T4771N22TOFXPSA1 from Infineon Technologies is a high-power phase-control thyristor designed for line-frequency AC power switching in industrial rectification and static VAR compensation systems. It delivers 4640 A average on-state current at 85°C case temperature, 2200–2900 V repetitive peak off-state voltage, and withstands 100 kA surge current (10 ms), enabling robust operation in welding and crowbar protection circuits.
For engineers reviewing the T4771N22TOFXPSA1 datasheet, T4771N22TOFXPSA1 pinout, T4771N22TOFXPSA1 application, or T4771N22TOFXPSA1 equivalent, key selection criteria include verified di/dt capability (300 A/µs), clamping force range (63–91 kN), thermal resistance (4.5 K/kW junction-to-case), gate trigger current (≤350 mA), and transient recovery behavior (Qr ≤12 mAs).
Technical Context
This thyristor operates as a fully controllable, gate-triggered semiconductor switch for medium- to high-voltage AC phase control. Its design supports bidirectional heat sinking, pressure-contact silicon pellet construction, and DC-rated anode/cathode terminals - optimized for forced-air or liquid-cooled industrial power converters.
It features high dv/dt immunity (1000 V/µs) and di/dt robustness (300 A/µs), with defined turn-off time (250 µs typ.) and recovered charge (12 mAs max.), ensuring reliable commutation in static compensators and drive rectifiers where line-synchronized conduction is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 2200–2900 V - Specifies maximum repetitive blocking voltage in forward/reverse direction at full operating temperature range. |
| ITAVM (TC = 85°C) | 4640 A - Maximum continuous average on-state current under specified heatsink conditions. |
| ITSM (10 ms) | 100000 A - Peak non-repetitive surge current handling capacity without device failure. |
| (diT/dt)cr | 300 A/µs - Minimum guaranteed rate of rise of on-state current before unintended turn-on. |
| RthJC | 4.5 K/kW - Thermal resistance from junction to case under two-sided cooling, critical for heatsink sizing. |
| vT0 / rT | 0.772 V / 0.107 mΩ - Threshold voltage and slope resistance defining on-state conduction loss at rated current. |
| Clamping Force | 63–91 kN - Required mechanical compression to maintain low contact resistance and thermal interface integrity. |
Pinout & Package
Package: Press-pack, double-sided cooled, disc-type thyristor with 151.5 mm max diameter, 100 mm contact diameter, and 26 mm height. Requires external clamping assembly and insulated mounting hardware.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (1) | Main current terminal (positive conduction path) | Carries full load current during forward conduction; must be thermally coupled to heatsink. |
| Cathode (2) | Main current terminal (negative conduction path) | Serves as return path for on-state current; dual-side cooling requires symmetric thermal interface. |
| Gate (4) | Control input for triggering conduction | Accepts ≥3 A pulse with ≥6 A/µs di/dt to ensure reliable turn-on; isolated from main terminals. |
| Hilfskathode (5) | Secondary cathode terminal (control reference) | Provides low-inductance gate return path; used in high-di/dt gate drive configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Full 50/60 Hz blocking over -40°C to +125°C | Ensures stable off-state isolation across industrial ambient and junction temperature extremes. |
| High di/dt capability (300 A/µs) | Prevents false triggering during fast current transients in motor drives and SVC systems. |
| High case non-rupture current | Withstands mechanical stress from 100 kA surge without housing fracture under proper clamping. |
| Two-sided thermal interface support | Enables symmetrical heat extraction from both anode and cathode faces for optimal thermal management. |
| Gate-controlled delay time ≤2 µs | Guarantees precise timing alignment for synchronized phase-angle control in multi-thyristor stacks. |
Applications
| Static VAR Compensation (SVC) | High-Current Rectification |
|---|---|
Use Scenario: Dynamic reactive power regulation in transmission substations using thyristor-switched capacitor/reactor banks. IC Role / Device Role / Timing Role: Main power switching element controlling conduction angle to adjust effective reactance per half-cycle. Use Value: Enables rapid, cycle-by-cycle VAR adjustment with 250 µs turn-off time and 100 kA fault tolerance. | Use Scenario: Primary rectification stage in high-power DC drives for rolling mills and mining equipment. IC Role / Device Role / Timing Role: Line-commutated AC-to-DC conversion with phase-controlled conduction in 6- or 12-pulse configurations. Use Value: Delivers 4640 A continuous current at 85°C with <1.2 V on-state drop, minimizing conduction losses. |
| Industrial Welding Systems | Crowbar Protection Circuits |
Use Scenario: Secondary-side current control in resistance spot welders requiring precise energy delivery per weld cycle. IC Role / Device Role / Timing Role: High-current AC switch synchronizing conduction to mains zero-crossing for repeatable weld energy. Use Value: Supports 300 A/µs di/dt and 100 kA surge rating to handle short-duration, high-peak welding currents. | Use Scenario: Fault protection in UPS and generator excitation systems by short-circuiting output during overvoltage events. IC Role / Device Role / Timing Role: Fast-acting crowbar switch triggered to bypass load and divert fault current away from sensitive components. Use Value: Guarantees turn-on within 2 µs and sustains 100 kA surge without rupture, preserving system integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-power phase-control thyristor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TT1700N22KOF | Lower ITAVM (3600 A @ 85°C); identical VDRM (2200 V); higher RthJC (5.2 K/kW) | Suitable for lower-current SVC or rectifier stacks where thermal margin allows reduced clamping force | Select when system derating permits 22% lower average current and simplified thermal interface. |
| T530N22TOF | Higher ITAVM (5300 A @ 85°C); same VDRM; larger diameter (170 mm); higher clamping force (100–130 kN) | Required for ultra-high-current welding or crowbar applications exceeding 4640 A RMS duty | Choose when >4640 A continuous current or >100 kA surge headroom is mandatory. |
Compared with TT1700N22KOF and T530N22TOF, T4771N22TOFXPSA1 offers balanced current rating, proven 4.5 K/kW thermal resistance, and standardized 151.5 mm form factor - making it optimal for modular, field-serviceable power stacks in mid-range industrial systems.
Availability
T4771N22TOFXPSA1 is available at Aetrix Electronics and suitable for static VAR compensation, high-current rectification, industrial welding, and crowbar protection applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for T4771N22TOFXPSA1 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 devices, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.
This part belongs to Infineon's "Netz-Thyristor" product line, engineered specifically for high-reliability, high-current AC power control in utility-scale and heavy industrial environments.
FAQ
What is the required clamping force for reliable operation of T4771N22TOFXPSA1?
The device requires a mechanical clamping force between 63 kN and 91 kN to ensure low contact resistance, uniform thermal transfer, and structural integrity under surge conditions. Insufficient force increases RthJC and vT, risking thermal runaway; excessive force may damage the ceramic housing or silicon pellet.
Can T4771N22TOFXPSA1 be used with single-sided cooling?
Yes, but with significant thermal penalty: RthJC rises to 8.6 K/kW (anode-cooled) or 9.5 K/kW (cathode-cooled), reducing allowable ITAVM by ~30%. Two-sided cooling is strongly recommended to achieve the rated 4640 A at 85°C case temperature.
What gate drive parameters ensure reliable turn-on?
A minimum gate current pulse of 3 A with di/dt ≥6 A/µs and duration ≥20 µs is required. Gate voltage must exceed 2.5 V (max VGT), and non-trigger voltage must remain below 0.4 V under blocking conditions to prevent false turn-on.
How does the recovered charge Qr affect commutation in SVC applications?
With Qr ≤12 mAs, the device minimizes reverse recovery losses and associated voltage overshoot during forced commutation. This enables stable, low-loss switching in thyristor-controlled reactors where predictable turn-off behavior is essential for VAR regulation accuracy.
T4771N22TOFXPSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- TO-200AF
- Packaging:
- Tray
- Product Status:
- Active
- Structure:
- Single
- Number of SCRs, Diodes:
- 1 SCR
- Voltage - Off State:
- 2.9 kV
- Current - On State (It (AV)) (Max):
- 6110 A
- Current - On State (It (RMS)) (Max):
- 6820 A
- Voltage - Gate Trigger (Vgt) (Max):
- 2.5 V
- Current - Gate Trigger (Igt) (Max):
- 350 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 100000A @ 50Hz
- Current - Hold (Ih) (Max):
- 350 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
T4771N22TOFXPSA1 FAQ
1.How can I place an order for T4771N22TOFXPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for T4771N22TOFXPSA1 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 T4771N22TOFXPSA1 reliable?
The price and inventory of T4771N22TOFXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T4771N22TOFXPSA1 is usually 5 days.
3.What payment methods are accepted for T4771N22TOFXPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T4771N22TOFXPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T4771N22TOFXPSA1?
T4771N22TOFXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T4771N22TOFXPSA1 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 T4771N22TOFXPSA1?
For technical support, including T4771N22TOFXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T4771N22TOFXPSA1 requirements.
6.How does Aetrix verify that T4771N22TOFXPSA1 is sourced from the original manufacturer or authorized distributors?
All T4771N22TOFXPSA1 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 T4771N22TOFXPSA1 meets industry standards.
7.What is the process for return or replacement of T4771N22TOFXPSA1?
All T4771N22TOFXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with T4771N22TOFXPSA1, 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 T4771N22TOFXPSA1 part is unused and in its original packaging.
Return procedure for T4771N22TOFXPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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