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Infineon Technologies TD500N18KOFXPSA1
- Part No.:
- TD500N18KOFXPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- SCRs - Modules
- Package:
- Module
- Datasheet:
-
TD500N18KOFXPSA1.pdf
- Description:
- THYR / DIODE MODULE DK
- Quantity:
- Payment:
- Shipping:
Inventory:2,203
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Product details
Overview
TD500N18KOFXPSA1 from Infineon Technologies is a phase-control thyristor module with pressure-contact construction, rated for 1800 V repetitive peak off-state voltage (VRRM), 500 A average on-state current at 85°C case temperature (ITAVM), and 17 kA non-repetitive surge current (ITSM). It serves as a high-power bidirectional switching element in industrial AC power control circuits such as soft starters and static switches.
For engineers reviewing the TD500N18KOFXPSA1 datasheet, TD500N18KOFXPSA1 pinout, TD500N18KOFXPSA1 application, or TD500N18KOFXPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.055 K/W), gate trigger current (≤250 mA), threshold voltage (0.85 V), slope resistance (0.35 mΩ), and insulated baseplate design for safe mounting in high-voltage drive rectifiers.
Technical Context
This dual-thyristor module implements a press-pack, double-sided cooled configuration with electrically isolated aluminum nitride (AlN) baseplate and industrial-standard 60 mm footprint. Its pressure-contact Si-pellet assembly eliminates wire bonds, enabling robust operation under high di/dt (200 A/µs) and dv/dt (1000 V/µs) stress.
The device operates in phase-angle controlled conduction mode with 250 µs typical turn-off time (tq) under commutated conditions and supports both single-phase (B2) and three-phase (B6) bridge topologies. Thermal performance is characterized by transient impedance data up to 10 s and DC ZthJC = 0.055 K/W per arm.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM / VDRM | 1800 V - Maximum repetitive blocking voltage per thyristor arm; defines maximum line-to-line AC voltage it can block in B6 rectifier applications. |
| ITAVM | 500 A @ TC = 85°C - Continuous RMS-equivalent current capability per arm; determines steady-state power handling in soft starter duty cycles. |
| ITSM | 17000 A @ tP = 10 ms - Short-circuit withstand rating; enables crowbar protection in UPS and battery charger fault scenarios. |
| VTO / rT | 0.85 V / 0.35 mΩ - Threshold voltage and slope resistance; jointly define on-state conduction loss profile and forward voltage drop at rated current. |
| RthJC | 0.055 K/W - Junction-to-case thermal resistance per arm; sets minimum heatsink requirement for thermal management in enclosed drive cabinets. |
| Visol | 3.6 kV RMS / 1 sec - Isolation test voltage between baseplate and terminals; certifies safety compliance for Class I insulation in industrial mains-connected equipment. |
| tq | 250 µs typ. - Commutated turn-off time; constrains maximum operating frequency in phase-controlled rectifiers and static transfer switches. |
Pinout & Package
TD500N18KOFXPSA1 is housed in an industrial-standard press-pack module with electrically insulated AlN baseplate, 60 mm × 60 mm footprint, and M1 (6 Nm) mechanical mounting torque. Terminals are arranged for dual-arm configuration with common cathode/anode layout optimized for B2/B6 bridge mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 / K2 | Anode of Arm 1 / Cathode of Arm 2 | Common terminal for back-to-back thyristor connection; used as AC input node in single-phase B2 bridges. |
| K1 / A2 | Cathode of Arm 1 / Anode of Arm 2 | Common terminal complementary to A1/K2; forms second AC input node in B2 topology or DC output node in B6 configurations. |
| G1, K1 | Gate & Cathode of Arm 1 | Isolated low-energy gate drive interface; requires ≤2.2 V trigger voltage and ≥1 A/µs diG/dt for reliable turn-on. |
| G2, K2 | Gate & Cathode of Arm 2 | Independent gate control path for second thyristor arm; enables asymmetrical firing in specialized power controller designs. |
| Baseplate | Electrically isolated thermal interface | AlN-insulated copper baseplate rated for 3.6 kV isolation; provides mechanical mounting surface and primary heat extraction path. |
Key Features
| Feature | Design Value |
|---|---|
| Pressure contact technology | Eliminates bond wires and solder joints, delivering >10⁶ switching cycles under full ITAVM load without degradation. |
| Electrically insulated baseplate | AlN ceramic layer provides 3.6 kV isolation and <0.02 K/W thermal resistance to heatsink when used with TIM. |
| Advanced Medium Power Technology (AMPT) | Optimized Si die geometry and emitter shorting enable 200 A/µs diT/dt rating and stable triggering down to -40°C ambient. |
| Industrial standard package | 60 mm × 60 mm footprint with M1/M2 torque specs ensures direct mechanical compatibility with legacy thyristor heatsink systems. |
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: Bidirectional phase-controlled switching element regulating AC voltage amplitude via firing angle delay. Use Value: Enables smooth torque delivery with <5% speed ripple and eliminates contactor wear in HVAC and pump drives. | Use Scenario: Three-phase AC-to-DC conversion in servo drive front-ends requiring regenerative braking support. IC Role / Device Role / Timing Role: Six-pulse (B6) thyristor bridge arm providing controllable DC bus voltage and bidirectional energy flow. Use Value: Supports 125°C junction operation and 17 kA surge tolerance during regen fault events in industrial motion systems. |
| Crowbar Protection | Static Transfer Switch |
Use Scenario: Instantaneous short-circuit activation across DC bus during overvoltage transients in UPS systems. IC Role / Device Role / Timing Role: High-current, low-VT thyristor pair triggered to clamp bus voltage below 10% tolerance. Use Value: Achieves <4 µs gate delay and 250 µs turn-on time to protect downstream IGBTs from catastrophic failure. | Use Scenario: Seamless transfer between two independent AC sources in critical infrastructure power distribution. IC Role / Device Role / Timing Role: Back-to-back thyristor module acting as zero-crossing synchronized bi-directional AC switch. Use Value: Delivers <10 ms transfer time with no load interruption and maintains isolation integrity during source transition. |
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 |
|---|---|---|---|
| TT500N18KOFXPSA1 | Same die, identical VRRM/ITAVM ratings, but uses traditional bolt-down package without AlN baseplate insulation. | Lacks integrated 3.6 kV isolation; requires external insulating hardware in grounded-chassis systems. | Select when cost sensitivity outweighs isolation convenience and existing heatsinks lack AlN compatibility. |
| TD500N16KOFXPSA1 | Lower VRRM (1600 V); otherwise identical thermal and electrical specs including RthJC (0.055 K/W) and ITSM (17 kA). | Suitable only for 400–480 VAC systems; not rated for 690 VAC industrial mains where 1800 V blocking is mandatory. | Choose for 400 VAC drive applications where derating margin is acceptable and supply chain availability favors 1600 V variant. |
Compared with TT500N18KOFXPSA1 and TD500N16KOFXPSA1, TD500N18KOFXPSA1 uniquely combines 1800 V blocking, AlN-based 3.6 kV isolation, and press-pack reliability-making it the only option qualified for 690 VAC crowbar and static switch deployments requiring certified Class I insulation.
Availability
TD500N18KOFXPSA1 is available at Aetrix Electronics and suitable for soft starters, drive rectifiers, crowbar protection circuits, and static transfer switches requiring stable component supply across multi-year industrial equipment lifecycles.
Supply support for TD500N18KOFXPSA1 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/TS 16949 and IECQ QC 080000.
This part belongs to Infineon's High-Power Thyristor Module product line, engineered specifically for ruggedized AC power control in harsh industrial environments where long-term reliability under thermal cycling and voltage transients is mission-critical.
FAQ
What is the maximum allowable case temperature for continuous operation?
The maximum case temperature (TC) is +125°C, but the rated average on-state current (ITAVM = 500 A) is specified at TC = 85°C. At TC = 125°C, derating to approximately 340 A is required per the ITAVM vs. TC curve on page 7 of the technical information document. Operation above 125°C risks irreversible junction damage.
Does TD500N18KOFXPSA1 require forced cooling?
No, forced cooling is not mandatory, but natural convection is insufficient for full-rated operation. With RthCA = 0.25 K/W (typical with finned heatsink), the module reaches thermal limit at ~320 A ITAVM. For 500 A operation, active airflow or liquid-cooled heatsinks achieving RthCA ≤ 0.08 K/W are required per the Ptot vs. TA curves on pages 8–9.
Can this module be used in asymmetrical firing configurations?
Yes - its dual independent gate terminals (G1/K1 and G2/K2) allow separate triggering of each thyristor arm. This enables asymmetrical conduction angles in specialized power controllers, such as DC bias injection for harmonic cancellation or adaptive load balancing in multi-source static switches.
What gate drive voltage and current are required for reliable turn-on?
A minimum gate trigger voltage of 2.2 V and peak gate current of ≥1 A are required under worst-case conditions (Tvj = 125°C, vD = 12 V). The gate characteristic curve (page 6) shows reliable triggering occurs within the shaded "Zündbereich" region, and gate pulse width must exceed 20 µs to ensure latching at full ITAVM.
TD500N18KOFXPSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- TD
- Package/Case:
- Module
- Packaging:
- Tray
- Product Status:
- Active
- Structure:
- Series Connection - SCR/Diode
- Number of SCRs, Diodes:
- 1 SCR, 1 Diode
- Voltage - Off State:
- 1.8 kV
- Current - On State (It (AV)) (Max):
- 500 A
- Current - On State (It (RMS)) (Max):
- 900 A
- Voltage - Gate Trigger (Vgt) (Max):
- 2.2 V
- Current - Gate Trigger (Igt) (Max):
- 250 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 17000A @ 50Hz
- Current - Hold (Ih) (Max):
- 300 mA
- Operating Temperature:
- 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
TD500N18KOFXPSA1 FAQ
1.How can I place an order for TD500N18KOFXPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TD500N18KOFXPSA1 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 TD500N18KOFXPSA1 reliable?
The price and inventory of TD500N18KOFXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TD500N18KOFXPSA1 is usually 5 days.
3.What payment methods are accepted for TD500N18KOFXPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TD500N18KOFXPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TD500N18KOFXPSA1?
TD500N18KOFXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TD500N18KOFXPSA1 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 TD500N18KOFXPSA1?
For technical support, including TD500N18KOFXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TD500N18KOFXPSA1 requirements.
6.How does Aetrix verify that TD500N18KOFXPSA1 is sourced from the original manufacturer or authorized distributors?
All TD500N18KOFXPSA1 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 TD500N18KOFXPSA1 meets industry standards.
7.What is the process for return or replacement of TD500N18KOFXPSA1?
All TD500N18KOFXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TD500N18KOFXPSA1, 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 TD500N18KOFXPSA1 part is unused and in its original packaging.
Return procedure for TD500N18KOFXPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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