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Infineon Technologies TT251N16KOFAHPSA1
- Part No.:
- TT251N16KOFAHPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- SCRs - Modules
- Package:
- Module
- Datasheet:
-
TT251N16KOFAHPSA1.pdf
- Description:
- SCR MODULE 1.6KV MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:3,688
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Product details
Overview
TT251N16KOFAHPSA1 from Infineon Technologies is a press-pack, double-sided, phase-control thyristor module rated for 1600 V repetitive peak off-state voltage (VDRM/VRRM), 250 A average on-state current at TC = 85 °C, and 9100 A non-repetitive surge current (ITSM). It features electrically insulated baseplate, pressure-contact silicon pellet construction, and is designed for high-reliability industrial power control in soft starters and static switches.
For engineers reviewing the TT251N16KOFAHPSA1 datasheet, TT251N16KOFAHPSA1 pinout, TT251N16KOFAHPSA1 application, or TT251N16KOFAHPSA1 equivalent, key selection criteria include verified junction-to-case thermal resistance (0.124 K/W), gate trigger current ≤200 mA, threshold voltage ≤0.8 V, slope resistance ≤0.7 mΩ, and isolation test voltage of 3.0 kV RMS (1 min).
Technical Context
This thyristor module implements a dual-arm, anti-parallel configuration suitable for AC phase-angle control in line-commutated applications. Its pressure-contact die attachment ensures low parasitic inductance and stable thermal performance under high di/dt (250 A/µs) and dv/dt (1000 V/µs) stress.
Designed for forced-air or liquid-cooled heatsink mounting, it delivers 410 A RMS on-state current capability with conduction-angle-dependent derating. The module's basic insulation (IEC 61140 Class 1) and 17 mm creepage distance support operation in industrial environments up to 125 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 1600 V - Maximum repetitive blocking voltage per arm; defines maximum AC line voltage compatibility (e.g., 690 VAC 3-phase systems) |
| ITAVM (TC = 85 °C) | 250 A - Continuous DC or sinusoidal average current per arm; sets steady-state thermal design baseline |
| ITSM (10 ms) | 9100 A - Short-circuit withstand capability; determines fuse coordination and protection circuit sizing |
| V(TO) max | 0.8 V - Threshold voltage; used with rT to model on-state conduction loss (vT = V(TO) + iT × rT) |
| rT max | 0.7 mΩ - Slope resistance; directly impacts conduction losses and thermal rise under load |
| RthJC max | 0.124 K/W - Junction-to-case thermal resistance per arm; critical for heatsink selection and thermal interface design |
| VISOL | 3.0 kV RMS (1 min) - Basic insulation rating; validates safety compliance for industrial mains-connected equipment |
Pinout & Package
Package: Press-pack, double-sided, isolated baseplate module with M1 (5 Nm) mechanical and M2 (12 Nm) terminal mounting. Dimensions conform to industrial standard package per Infineon short-form catalog.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (A1) | Main current terminal - Arm 1 anode | High-current path for one thyristor arm; requires low-inductance busbar connection |
| Cathode 1 (K1) | Main current terminal - Arm 1 cathode | Paired with A1 to form first controlled rectifier arm; shares baseplate isolation |
| Anode 2 (A2) | Main current terminal - Arm 2 anode | Second arm for anti-parallel or full-bridge AC control; electrically isolated from A1/K1 |
| Cathode 2 (K2) | Main current terminal - Arm 2 cathode | Completes second thyristor arm; enables bidirectional phase control or AC switching |
| Gate 1 (G1) | Control input - Arm 1 gate | Triggers conduction of Arm 1; requires ≤2.0 V trigger voltage and ≥1 A/µs di/dt |
| Cathode 1 (K1) | Reference - Arm 1 gate return | Common reference for G1 drive; must be low-impedance to avoid false triggering |
| Gate 2 (G2) | Control input - Arm 2 gate | Independent trigger for Arm 2; supports complementary or interleaved firing schemes |
| Cathode 2 (K2) | Reference - Arm 2 gate return | Isolated gate return path; maintains channel independence under high dv/dt |
Key Features
| Feature | Design Value |
|---|---|
| Pressure-contact silicon pellet | Eliminates wire bonds and solder layers, enabling >10⁶ cycle lifetime under thermal cycling and high-current stress |
| Electrically insulated baseplate | AlN ceramic isolation (Class 1, IEC 61140) allows direct mounting to grounded heatsinks without external insulators |
| High di/dt capability (250 A/µs) | Supports fast turn-on in high-inductance motor loads without commutation failure or false triggering |
| Low RthJC (0.124 K/W) | Enables compact thermal design with ≤85 °C case temperature at 250 A ITAVM under forced-air cooling |
| 17 mm creepage distance | Meets reinforced insulation requirements for 1000 VAC working voltage in pollution degree 3 environments |
Applications
| Soft Starters | Rectifiers for Drives |
|---|---|
Use Scenario: Controlled ramp-up of induction motor voltage during startup to limit inrush current and mechanical stress. IC Role / Device Role / Timing Role: Phase-controlled thyristor arm regulating AC voltage amplitude via firing angle delay. Use Value: Enables 250 A continuous motor current handling with <1.4 V on-state drop, reducing conduction losses by ≥15% vs. legacy modules. | Use Scenario: Line-commutated AC-to-DC conversion in variable-speed drive front-ends feeding DC link capacitors. IC Role / Device Role / Timing Role: Bidirectional current control element in B6 six-pulse bridge configuration. Use Value: Supports 690 VAC 3-phase input with 9100 A short-circuit withstand, ensuring ride-through during grid transients. |
| Crowbar Protection | Static Switches |
Use Scenario: Fast-acting overvoltage protection in UPS or generator systems by shorting output to ground during fault. IC Role / Device Role / Timing Role: High-current crowbar switch triggered upon overvoltage detection signal. Use Value: Delivers 9100 A surge current within 3 µs gate delay, clamping transient energy before downstream damage occurs. | Use Scenario: Solid-state replacement of electromechanical contactors in HVAC, lighting, or industrial heating control. IC Role / Device Role / Timing Role: Zero-crossing or phase-angle controlled AC power switch with galvanic isolation. Use Value: Provides 3.0 kV isolation and 125 °C junction rating for uninterrupted operation in harsh ambient conditions. |
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 |
|---|---|---|---|
| TT251N18KOFAHPSA1 | Higher VDRM/VRRM (1800 V); identical ITAVM, RthJC, and package | Better suited for 1000 VAC distribution networks or high-altitude installations with reduced air insulation | Select when system peak line voltage exceeds 1300 V or long-term reliability under overvoltage stress is prioritized |
| TD251N16KOFAHPSA1 | Single-arm configuration; same voltage/current ratings but no anti-parallel pairing | Requires external back-to-back mounting for AC control; increases footprint and thermal coupling complexity | Choose only if discrete arm control or modular scalability across multiple PCBs is required |
Compared with TT251N16KOFAHPSA1, the TT251N18KOFAHPSA1 offers higher blocking margin without thermal or packaging trade-offs, while the TD251N16KOFAHPSA1 sacrifices integrated anti-parallel functionality for layout flexibility-making the TT251N16KOFAHPSA1 optimal for space-constrained, high-reliability AC power control.
Availability
TT251N16KOFAHPSA1 is available at Aetrix Electronics and suitable for soft starters, static switches, crowbar protection circuits, and rectifiers for drives requiring stable component supply, long-life thermal cycling performance, and certified industrial isolation.
Supply support for TT251N16KOFAHPSA1 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 security solutions, with global manufacturing and R&D infrastructure.
This part belongs to Infineon's "Netz-Thyristor-Modul" product line, engineered specifically for high-power, line-commutated industrial AC control applications demanding robustness, long service life, and validated thermal performance.
FAQ
What is the maximum allowable case temperature for continuous operation?
The maximum case temperature (TC) is not explicitly specified as a standalone limit; instead, the device is rated for ITAVM = 250 A at TC = 85 °C. Operation above 85 °C requires derating per the TC = f(ITAVM) curve on page 7 of the technical information document, with absolute maximum junction temperature (Tvj max) fixed at 125 °C.
Does TT251N16KOFAHPSA1 require forced cooling?
Forced cooling is recommended to sustain ITAVM = 250 A continuously. Natural convection is insufficient: the thermal resistance from case to ambient (RthCA) must be ≤0.18 K/W for 250 A operation, achievable only with forced-air (≥5 m/s) or liquid-cooled heatsinks per the Ptot vs. RthCA curves on pages 8–9.
Can this module be used in a single-phase full-wave rectifier?
Yes - TT251N16KOFAHPSA1 contains two independent thyristor arms and is configured for anti-parallel operation, making it directly suitable for single-phase full-wave phase-controlled rectification (e.g., B2 topology) with up to 410 A RMS output current at appropriate conduction angles.
What gate drive specifications are required for reliable triggering?
A minimum gate trigger current of 1 A with di/dt ≥1 A/µs is required for guaranteed turn-on. Gate voltage must reach ≥2.0 V within 3 µs (tgd max), and peak gate power must stay within limits defined by the PGM = f(tg) curve (e.g., 100 W for 0.5 ms pulse), per page 6 of the technical information.
TT251N16KOFAHPSA1 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:
- 1.6 kV
- Current - On State (It (AV)) (Max):
- 250 A
- Current - On State (It (RMS)) (Max):
- -
- Voltage - Gate Trigger (Vgt) (Max):
- 2 V
- Current - Gate Trigger (Igt) (Max):
- 200 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 9100A @ 50Hz
- Current - Hold (Ih) (Max):
- 300 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
TT251N16KOFAHPSA1 FAQ
1.How can I place an order for TT251N16KOFAHPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TT251N16KOFAHPSA1 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 TT251N16KOFAHPSA1 reliable?
The price and inventory of TT251N16KOFAHPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TT251N16KOFAHPSA1 is usually 5 days.
3.What payment methods are accepted for TT251N16KOFAHPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TT251N16KOFAHPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TT251N16KOFAHPSA1?
TT251N16KOFAHPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TT251N16KOFAHPSA1 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 TT251N16KOFAHPSA1?
For technical support, including TT251N16KOFAHPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TT251N16KOFAHPSA1 requirements.
6.How does Aetrix verify that TT251N16KOFAHPSA1 is sourced from the original manufacturer or authorized distributors?
All TT251N16KOFAHPSA1 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 TT251N16KOFAHPSA1 meets industry standards.
7.What is the process for return or replacement of TT251N16KOFAHPSA1?
All TT251N16KOFAHPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TT251N16KOFAHPSA1, 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 TT251N16KOFAHPSA1 part is unused and in its original packaging.
Return procedure for TT251N16KOFAHPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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