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Infineon Technologies TT425N14KOFHPSA2
- Part No.:
- TT425N14KOFHPSA2
- Manufacturer:
- Infineon Technologies
- Category:
- SCRs - Modules
- Package:
- Module
- Datasheet:
-
TT425N14KOFHPSA2.pdf
- Description:
- SCR MODULE 1.4KV 800A MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:9,025
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Product details
Overview
TT425N14KOFHPSA2 from Infineon Technologies is a phase-control thyristor module with dual 1400 V VDRM/VRRM rating, 471 A average on-state current (TC = 85 °C), and 14.5 kA non-repetitive surge capability. It employs pressure-contact technology and AlN-based electrical isolation for high-reliability industrial power control in soft starters and static switches.
For engineers reviewing the TT425N14KOFHPSA2 datasheet, TT425N14KOFHPSA2 pinout, TT425N14KOFHPSA2 application, or TT425N14KOFHPSA2 equivalent, key selection criteria include junction-to-case thermal resistance (0.065 K/W), gate trigger voltage (≤1.5 V), critical dv/dt rating (1000 V/µs), and insulated baseplate construction for safe mounting in high-voltage drive rectifiers.
Technical Context
This dual-thyristor module operates in phase-controlled AC power regulation, supporting 50/60 Hz line frequencies with 180° conduction angle capability. Its pressure-contact die attachment ensures stable thermal performance under repetitive surge stress up to 14.5 kA at 10 ms, while the AlN-insulated baseplate enables direct heatsink mounting without additional isolation hardware.
The device features a 120 A/µs critical di/dt rating and 1000 V/µs critical dv/dt rating, enabling robust commutation in B2 and B6 bridge configurations. Gate triggering is specified at ≤250 mA IGT and ≤1.5 V VGT under standard test conditions, with holding current ≤300 mA and latching current ≤1500 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 1400 V - Maximum repetitive blocking voltage per thyristor arm, defining safe AC line voltage operation up to 1000 V RMS. |
| ITAVM (TC = 85 °C) | 471 A - Continuous DC-equivalent current per arm at case temperature of 85 °C, used for thermal design of heatsink interface. |
| ITSM (10 ms) | 14500 A - Non-repetitive surge current rating, determining short-circuit withstand capability in crowbar or soft-start fault protection. |
| RthJC | 0.065 K/W - Junction-to-case thermal resistance per arm, directly used to calculate maximum allowable power dissipation at given TC. |
| (dv/dt)cr | 1000 V/µs - Minimum critical off-state voltage rise rate before unintended turn-on, requiring snubber design for inductive loads. |
| VTO / rT | 0.9 V / 0.35 mΩ - Threshold voltage and slope resistance, defining forward conduction loss profile at high current (e.g., 1.5 V @ 1500 A). |
| Visol (1 min) | 3.0 kV RMS - Basic insulation test voltage between baseplate and terminals, certifying safety isolation for Class I equipment per IEC61140. |
Pinout & Package
TT425N14KOFHPSA2 is housed in an industrial-standard press-pack module with electrically insulated AlN baseplate and 60 mm footprint. Terminal layout follows dual-arm configuration: two main anode/cathode pairs (A1/K1 and A2/K2) plus isolated gate terminals (G1, G2, and common cathode reference).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2 | Anode (arm 1 and arm 2) | High-side AC line connections for B2/B6 bridge topologies; rated for full ITAVM and ITSM currents. |
| K1, K2 | Cathode (arm 1 and arm 2) | Low-side output nodes; K2 serves as common cathode reference in dual-arm operation. |
| G1, G2 | Gate (arm 1 and arm 2) | Isolated low-energy control inputs; require ≤250 mA trigger current and maintain ≥0.2 V non-trigger threshold. |
| Baseplate | Electrically insulated thermal path | AlN-ceramic insulated mounting surface rated for 3.0 kV RMS isolation; requires 6 Nm M1 torque for mechanical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Pressure-contact die attachment | Eliminates wire bonds and solder interfaces, ensuring stable RthJC and long-term reliability under thermal cycling in industrial drives. |
| AlN-based basic insulation | Provides reinforced isolation (3.0 kV RMS, 1 min) between power terminals and baseplate, enabling direct heatsink mounting without supplemental insulation. |
| 120 A/µs critical di/dt | Supports fast turn-on in high-inductance motor starter applications without requiring forced commutation circuitry. |
| 1000 V/µs critical dv/dt | Enables operation with minimal snubber components in UPS rectifier and static switch designs where voltage transients exceed 600 V/µs. |
| DC and AC-rated thermal resistance | RthJC = 0.065 K/W (per arm, DC) allows accurate steady-state thermal modeling for both continuous and phase-angle controlled loads. |
Applications
| Soft Starter | Drive Rectifier |
|---|---|
Use Scenario: Controlled ramp-up of induction motor voltage during startup to limit inrush current and mechanical stress. IC Role / Device Role / Timing Role: Dual-thyristor phase-controlled switching element regulating AC line voltage applied to motor windings. Use Value: Enables smooth torque delivery using 0–180° conduction angle control, leveraging 471 A ITAVM and 14.5 kA ITSM for overload tolerance. | Use Scenario: AC-to-DC conversion in variable-speed drive front-ends with regenerative braking support. IC Role / Device Role / Timing Role: B6 six-pulse bridge arm providing bidirectional current handling and commutation in rectifier/inverter stages. Use Value: Supports 1200 A ID in B6 configuration with RthCA ≤ 0.12 K/W, enabled by 0.065 K/W RthJC and AlN baseplate thermal coupling. |
| Crowbar Protection | Static Switch |
Use Scenario: Fast-acting overvoltage protection in UPS systems by shorting DC bus to ground during fault events. IC Role / Device Role / Timing Role: High-current thyristor triggered to conduct within 4 µs tgd, diverting >10 kA fault current. Use Value: Leverages 14.5 kA ITSM and 1000 V/µs (dv/dt)cr to sustain fault current without destruction while upstream breakers operate. | Use Scenario: Solid-state replacement of electromechanical contactors in HVAC and industrial power distribution panels. IC Role / Device Role / Timing Role: Bidirectional AC switching element controlling load connection/disconnection with zero-crossing or phase-angle firing. Use Value: Delivers 471 A continuous current with <1.5 V VT and 0.35 mΩ rT, minimizing conduction losses versus mechanical alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phase-control thyristor module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TT425N16KOFHPSA2 | Higher VDRM/VRRM (1600 V) but identical ITAVM, RthJC, and package; same gate drive requirements. | Better suited for 1150 V AC line systems or enhanced margin in 690 V industrial grids. | Select when system peak line voltage exceeds 1400 V or higher blocking margin is required without changing thermal or gate design. |
| TT575N14KOFHPSA2 | Higher ITAVM (650 A) and ITSM (18.5 kA); same VDRM/VRRM, RthJC (0.045 K/W), and AlN insulation. | Targeted at higher-power soft starters and medium-voltage drive rectifiers demanding >500 A continuous current. | Choose when thermal headroom or surge capacity must increase beyond TT425N14KOFHPSA2's 471 A/14.5 kA limits, accepting larger footprint. |
Compared with TT425N14KOFHPSA2, the 1600 V variant offers higher voltage margin without thermal trade-offs, while the 575 A version delivers +38% current capacity and lower RthJC at the cost of increased size-both retain identical gate drive and isolation architecture.
Availability
TT425N14KOFHPSA2 is available at Aetrix Electronics and suitable for soft starters, drive rectifiers, crowbar protection circuits, and static switches requiring stable component supply across industrial OEM production programs.
Supply support for TT425N14KOFHPSA2 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 ISO 9001 and IATF 16949.
This part belongs to Infineon's Thyristor Module product line, engineered for high-reliability AC power control in harsh industrial environments including motor drives, UPS systems, and grid-tied power conditioning.
FAQ
What is the maximum allowable case temperature for continuous operation?
The maximum case temperature (Tc op) is +125 °C, with derated ITAVM values shown in the datasheet for TC above 85 °C. At TC = 125 °C, ITAVM drops to approximately 280 A for 180° conduction, based on the published TC = f(ITAVM) curve on page 7.
Does TT425N14KOFHPSA2 require external gate resistors?
Yes - gate resistors are required to limit peak gate current and ensure reliable triggering. Typical design uses 10–22 Ω series resistance with 15–20 V gate drive to meet IGT ≤ 250 mA and VGT ≤ 1.5 V while avoiding excessive gate power dissipation during repeated firing.
Can this module be used in parallel configurations?
No - the TT425N14KOFHPSA2 is not characterized or recommended for paralleling. Its pressure-contact construction and dynamic parameter matching (e.g., tq = 250 µs typ.) are optimized for single-module use; paralleling would require active current balancing and is unsupported by Infineon's application guidance.
What is the creepage distance and why does it matter?
The creepage distance is 19 mm, measured across the insulated baseplate surface between terminals. This value satisfies IEC 61800-5-1 requirements for Pollution Degree 3 environments, ensuring safe operation in dusty, humid industrial settings without risk of surface tracking or flashover.
TT425N14KOFHPSA2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- Module
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Structure:
- Series Connection - All SCRs
- Number of SCRs, Diodes:
- 2 SCRs
- Voltage - Off State:
- 1.4 kV
- Current - On State (It (AV)) (Max):
- 471 A
- Current - On State (It (RMS)) (Max):
- 800 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.5 V
- Current - Gate Trigger (Igt) (Max):
- 250 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 14500A @ 50Hz
- Current - Hold (Ih) (Max):
- 300 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
TT425N14KOFHPSA2 FAQ
1.How can I place an order for TT425N14KOFHPSA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for TT425N14KOFHPSA2 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 TT425N14KOFHPSA2 reliable?
The price and inventory of TT425N14KOFHPSA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TT425N14KOFHPSA2 is usually 5 days.
3.What payment methods are accepted for TT425N14KOFHPSA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TT425N14KOFHPSA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TT425N14KOFHPSA2?
TT425N14KOFHPSA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TT425N14KOFHPSA2 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 TT425N14KOFHPSA2?
For technical support, including TT425N14KOFHPSA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TT425N14KOFHPSA2 requirements.
6.How does Aetrix verify that TT425N14KOFHPSA2 is sourced from the original manufacturer or authorized distributors?
All TT425N14KOFHPSA2 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 TT425N14KOFHPSA2 meets industry standards.
7.What is the process for return or replacement of TT425N14KOFHPSA2?
All TT425N14KOFHPSA2 units undergo pre-shipment inspection (PSI). If there is an issue with TT425N14KOFHPSA2, 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 TT425N14KOFHPSA2 part is unused and in its original packaging.
Return procedure for TT425N14KOFHPSA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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