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Infineon Technologies TT251N18KOFHPSA1
- Part No.:
- TT251N18KOFHPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- SCRs - Modules
- Package:
- Module
- Datasheet:
-
TT251N18KOFHPSA1.pdf
- Description:
- SCR MODULE 1.8KV 250A MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:2,124
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Product details
Overview
TT251N18KOFHPSA1 from Infineon Technologies is a pressure-contact thyristor module for phase-controlled AC power regulation in industrial drive rectifiers and static switches, featuring VDRM/VRRM = 1800 V, ITAVM = 250 A (TC = 85 °C), ITSM = 9100 A (10 ms), VT0 ≤ 0.8 V, and rT ≤ 0.7 mΩ - deployed in high-reliability battery charger and crowbar protection circuits.
For engineers reviewing the TT251N18KOFHPSA1 datasheet, TT251N18KOFHPSA1 pinout, TT251N18KOFHPSA1 application, or TT251N18KOFHPSA1 equivalent, key selection criteria include repetitive peak blocking voltage (1800 V), RMS on-state current capability (410 A), junction-to-case thermal resistance (0.124 K/W), gate trigger current (≤200 mA), and electrically insulated baseplate construction.
Technical Context
This dual-thyristor phase control module uses pressure-contact die attachment for low parasitic inductance and stable thermal performance under high di/dt (250 A/µs) and dv/dt (1000 V/µs) stress. Its symmetrical dual-arm configuration supports B2 two-pulse and B6 six-pulse bridge topologies with independent gate control per arm.
Designed for forced-air or liquid-cooled heatsink mounting, it delivers 250 A average on-state current at TC = 85 °C with 125 °C maximum junction temperature, and features class 1 basic insulation (AlN substrate) rated for 3.6 kV RMS insulation test voltage (1 sec).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 1800 V - maximum repetitive blocking voltage per thyristor arm, enabling use in 690 V AC line-fed industrial drives |
| ITAVM | 250 A at TC = 85 °C - continuous DC-equivalent current rating per arm, defining heatsink sizing baseline |
| ITSM | 9100 A (10 ms) - non-repetitive surge current capacity, supporting short-circuit crowbar operation |
| VT0 / rT | 0.8 V / 0.7 mΩ - threshold voltage and slope resistance, determining conduction loss at 800 A (≤1.4 V total drop) |
| RthJC | 0.124 K/W per module - thermal resistance from junction to case, critical for calculating max power dissipation (PTAV ≤ 450 W) |
| (diT/dt)cr | 250 A/µs - minimum required commutation di/dt to ensure reliable turn-on without false triggering |
| VISOL | 3.6 kV RMS (1 sec) - reinforced isolation rating between baseplate and terminals, meeting IEC 61140 Class 1 safety |
Pinout & Package
TT251N18KOFHPSA1 is housed in an industrial-standard pressure-contact module with electrically insulated AlN-ceramic baseplate (50 mm × 50 mm footprint), M2 terminal screws (12 Nm torque), and DIN 46244 A-style control terminals (2.8 × 0.8 mm). Weight: 800 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 / K1 | Anode 1 / Cathode 1 | Main power terminals for first thyristor arm; rated for 250 A continuous, 9100 A surge |
| A2 / K2 | Anode 2 / Cathode 2 | Main power terminals for second thyristor arm; fully isolated from A1/K1 for B6 bridge configuration |
| G1 / K1 | Gate 1 / Cathode 1 | Isolated gate drive input for arm 1; requires ≤200 mA trigger current at ≤2.0 V |
| G2 / K2 | Gate 2 / Cathode 2 | Isolated gate drive input for arm 2; independent control enables asymmetrical firing in soft-start applications |
| Baseplate | Thermal & Electrical Reference | Electrically insulated (3.6 kV) but thermally conductive surface; must be mounted to heatsink with 0.02 K/W RthCH |
Key Features
| Feature | Design Value |
|---|---|
| Pressure contact die attachment | Eliminates wire bonds and solder fatigue, ensuring >10⁶ thermal cycles at ΔT = 100 K in drive inverters |
| Electrically insulated baseplate | AlN ceramic substrate provides 3.6 kV isolation and 0.02 K/W thermal interface to heatsink |
| Dual-arm independent gating | Enables precise phase-angle control per arm for B2/B6 rectifier topologies and static switch redundancy |
| High dv/dt immunity | 1000 V/µs critical off-state voltage rise rate prevents false turn-on in noisy industrial EMI environments |
| Low conduction loss | 0.7 mΩ slope resistance + 0.8 V VT0 yields <1.4 V total drop at 800 A, reducing thermal load by ~15% vs. legacy modules |
Applications
| Soft Starters | Drive Rectifiers |
|---|---|
Use Scenario: Controlled ramp-up of motor voltage during startup to limit inrush current in HVAC and pump systems. IC Role / Device Role / Timing Role: Dual-arm thyristor module operating in phase-controlled B2 configuration, with independent gate timing per half-cycle. Use Value: Enables smooth torque delivery while maintaining <250 A thermal steady-state at 85 °C case temperature. | Use Scenario: AC-to-DC conversion in industrial servo drive front-ends requiring regenerative braking support. IC Role / Device Role / Timing Role: B6 six-pulse bridge rectifier with synchronized firing across all six arms for low-harmonic DC bus generation. Use Value: Delivers 410 A RMS output current with <0.124 K/W thermal resistance, enabling compact heatsink design. |
| Crowbar Protection | Battery Chargers |
Use Scenario: Instantaneous short-circuit activation across DC bus during overvoltage faults in UPS and wind turbine converters. IC Role / Device Role / Timing Role: High-current thyristor pair triggered into full conduction to divert fault energy away from sensitive IGBTs. Use Value: Withstands 9100 A surge for 10 ms and recovers within 250 µs, ensuring system-level fault containment. | Use Scenario: Three-phase controlled rectification in telecom and EVSE battery charging systems with programmable charge profiles. IC Role / Device Role / Timing Role: Phase-angle modulated B6 rectifier delivering regulated DC output via closed-loop gate timing control. Use Value: 1800 V blocking voltage supports 690 V AC input; 0.8 V VT0 minimizes conduction loss at partial-load charging states. |
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 |
|---|---|---|---|
| TT251N16KOFHPSA1 | VDRM/VRRM = 1600 V (vs. 1800 V); identical ITAVM, RthJC, and package | Suitable for 600 V AC line systems only; not rated for 690 V industrial mains | Select when 1600 V blocking suffices and cost optimization is prioritized over future-proofing |
| TT330N18KOFHPSA1 | ITAVM = 330 A (vs. 250 A); same 1800 V rating, 0.092 K/W RthJC, larger baseplate | Requires larger heatsink and higher gate drive energy; supports higher continuous power density | Choose for new designs targeting >300 A average current with headroom for thermal derating |
Compared with TT251N16KOFHPSA1 and TT330N18KOFHPSA1, TT251N18KOFHPSA1 uniquely balances 1800 V robustness with 250 A thermal capability in the standard 50 mm footprint - ideal for retrofitting legacy 690 V drive rectifiers without mechanical redesign.
Availability
TT251N18KOFHPSA1 is available at Aetrix Electronics and suitable for soft starters, drive rectifiers, crowbar protection circuits, and battery chargers requiring stable component supply across multi-year industrial production programs.
Supply support for TT251N18KOFHPSA1 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 markets.
This part belongs to Infineon's "Netz-Thyristor-Modul" product line, engineered specifically for high-power phase-controlled AC/DC conversion in mission-critical industrial equipment where reliability under thermal and electrical stress is paramount.
FAQ
What is the maximum allowable case temperature for continuous operation?
The maximum case temperature (TC) for continuous operation is +125 °C, as specified in the thermal characteristics table. At this temperature, the device maintains its rated ITAVM = 250 A with proper heatsink interface (RthCH ≤ 0.04 K/W per arm) and ambient conditions compliant with IEC 60068-2-1/2.
Can TT251N18KOFHPSA1 be used in a single-phase B2 bridge configuration?
Yes - the dual-arm architecture supports B2 two-pulse bridge operation using A1/K1 and A2/K2 as opposing legs. Gate terminals G1/K1 and G2/K2 allow independent firing angle control, enabling full-wave phase-controlled rectification with adjustable output voltage from 0–100% of peak AC input.
What gate drive voltage and current are required for reliable turn-on?
A minimum gate trigger voltage of 2.0 V and current of 200 mA (at vD = 12 V, Tvj = 25 °C) ensures guaranteed turn-on. For robust operation across temperature (-40 to +125 °C), gate pulses should deliver ≥300 mA peak with 1 A/µs diG/dt and ≥20 µs pulse width to exceed latching current (IL ≤ 1200 mA).
Is the baseplate electrically isolated, and what is its isolation rating?
Yes - the baseplate features AlN ceramic insulation rated for 3.6 kV RMS (1 second) per IEC 61140 Class 1 requirements. This allows direct mounting to grounded heatsinks without additional insulating hardware, simplifying mechanical integration while maintaining safety clearance of 17 mm creepage distance.
TT251N18KOFHPSA1 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:
- 1.8 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
TT251N18KOFHPSA1 FAQ
1.How can I place an order for TT251N18KOFHPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TT251N18KOFHPSA1 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 TT251N18KOFHPSA1 reliable?
The price and inventory of TT251N18KOFHPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TT251N18KOFHPSA1 is usually 5 days.
3.What payment methods are accepted for TT251N18KOFHPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TT251N18KOFHPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TT251N18KOFHPSA1?
TT251N18KOFHPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TT251N18KOFHPSA1 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 TT251N18KOFHPSA1?
For technical support, including TT251N18KOFHPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TT251N18KOFHPSA1 requirements.
6.How does Aetrix verify that TT251N18KOFHPSA1 is sourced from the original manufacturer or authorized distributors?
All TT251N18KOFHPSA1 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 TT251N18KOFHPSA1 meets industry standards.
7.What is the process for return or replacement of TT251N18KOFHPSA1?
All TT251N18KOFHPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TT251N18KOFHPSA1, 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 TT251N18KOFHPSA1 part is unused and in its original packaging.
Return procedure for TT251N18KOFHPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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