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Infineon Technologies D475N36BXPSA1
- Part No.:
- D475N36BXPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single Diodes
- Package:
- DO-205AA, DO-8, Stud
- Datasheet:
-
D475N36BXPSA1.pdf
- Description:
- DIODE GEN PURP 3.6KV 475A
- Quantity:
- Payment:
- Shipping:
Inventory:6,593
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Product details
Overview
D475N36BXPSA1 from Infineon Technologies (formerly EUPEC) is a 3600 V, 475 A mean forward current, press-pack silicon power rectifier diode with dual-sided cooling capability and anode-to-case polarity. It features 0.085 °C/W junction-to-case thermal resistance, 1.78 V max on-state voltage at 1.4 kA, and 819 kA²s I²t rating for 10 ms surge - deployed in high-power industrial DC drives and traction converter line-side rectification.
For engineers reviewing the D475N36BXPSA1 datasheet, D475N36BXPSA1 pinout, D475N36BXPSA1 application, or D475N36BXPSA1 equivalent, key selection criteria include repetitive peak reverse voltage (VRRM = 3600 V), RMS forward current (IFRMSM = 745 A), junction temperature limit (160 °C), and pressure-contact mechanical mounting with M24 x 1.5 thread and 60 Nm torque specification.
Technical Context
This device is a single-die, planar, diffusion-controlled silicon rectifier optimized for high-voltage, high-current AC/DC conversion in forced-cooled, modular power assemblies. Its 34 mm diameter Si pellet uses symmetric double-sided heat extraction and exhibits low slope resistance (0.612 mΩ) and tight threshold voltage (0.765 V) at 160 °C junction temperature.
The diode operates with anode-connected-to-case polarity and supports non-repetitive surge currents up to 12.8 kA (10 ms, 25 °C) and 10.9 kA (10 ms, 160 °C). Reverse leakage remains ≤40 mA at VRRM and maximum junction temperature, enabling stable operation in high-temperature rectifier stacks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 3600 V - Maximum repetitive reverse blocking voltage; defines usable DC link voltage headroom in 3-level NPC or diode-clamped converters. |
| IFAVM | 475 A - Mean forward current at 100 °C case temperature; sets continuous conduction mode rating for line-commutated rectifiers. |
| IFRMSM | 745 A - RMS forward current rating; determines thermal design margin under non-sinusoidal load current waveforms. |
| RthJC | 0.085 °C/W - Junction-to-case thermal resistance (DC); enables precise thermal modeling of double-sided heatsink interfaces. |
| VT(max) | 1.78 V - On-state voltage at 1.4 kA and 160 °C; directly impacts conduction loss and efficiency in multi-kW systems. |
| I²t | 819 kA²s - Surge energy handling at 25 °C/10 ms; defines short-circuit withstand capability without destructive failure. |
| iR(max) | 40 mA - Max reverse leakage at VRRM and 160 °C; critical for voltage sharing in series-stacked configurations. |
Pinout & Package
Package: Press-pack, B-type case (EUPEC standard), copper baseplate (70 mm²), M24 x 1.5 threaded anode stud, cathode rope terminal, flexible red/blue insulated tubing. Anode is electrically connected to the case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode Stud (M24 x 1.5) | Main anode connection | Case-integrated high-current path; requires 60 Nm tightening torque and direct thermal interface to heatsink. |
| Cathode Rope | Main cathode connection | Flexible stranded copper termination; accommodates mechanical misalignment and thermal expansion in stacked assemblies. |
| Case (Anode) | Active anode node | Electrically tied to anode; serves as primary heat transfer surface for double-sided cooling architecture. |
Key Features
| Feature | Design Value |
|---|---|
| Double-sided cooling interface | Enables thermal management via both anode and cathode surfaces, reducing total thermal resistance in compact power modules. |
| Pressure-contact Si pellet | 34 mm diameter silicon die held by mechanical compression - eliminates solder fatigue and supports >10⁶ thermal cycles. |
| High I²t surge rating | 819 kA²s at 25 °C allows robust fault ride-through in grid-tied rectifiers during AC line faults. |
| Low slope resistance | 0.612 mΩ minimizes forward voltage rise under overload, improving current-sharing stability in parallel-connected diodes. |
Applications
| Railway Traction Rectifier | Industrial HVDC Power Supply |
|---|---|
Use Scenario: Line-side 3-phase rectification in 1.5 kV DC railway substations feeding overhead catenary. IC Role / Device Role / Timing Role: Main power rectifier in uncontrolled thyristor/diode hybrid bridges handling 2–3 MW per cabinet. Use Value: 3600 V VRRM provides 2.5× safety margin over 1.5 kV nominal DC link; 160 °C max junction temperature ensures reliability under ambient +70 °C tunnel conditions. | Use Scenario: High-current DC output stage for electroplating and aluminum smelting rectifier systems. IC Role / Device Role / Timing Role: Primary rectifying element in air- or water-cooled transformer-rectifier sets delivering 50–100 kA DC. Use Value: 475 A IFAVM and 745 A IFRMSM support continuous 100% duty cycle; low RthJC enables integration into compact liquid-cooled busbar stacks. |
| Metallic Arc Furnace Excitation | Renewable Energy Grid Interface |
Use Scenario: Field excitation supply for large synchronous motors driving arc furnace transformers. IC Role / Device Role / Timing Role: Uncontrolled rectifier in high-inertia DC field winding supplies with slow transient response requirements. Use Value: 12.8 kA IFSM withstands inrush surges during motor startup; pressure-contact construction resists vibration-induced failure in mill environments. | Use Scenario: Pre-charging and crowbar protection circuitry in offshore wind turbine converters. IC Role / Device Role / Timing Role: High-energy clamping diode in DC-link snubber networks and pre-charge paths. Use Value: 819 kA²s I²t rating absorbs capacitor inrush energy; 40 mA iR(max) ensures stable voltage hold-off during extended standby periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage power rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DD475N36K | VRRM = 3600 V, same IFAVM/IFRMSM, but TO-247-3L package with isolated tab; RthJC = 0.12 °C/W. | Single-sided cooling only; unsuitable for double-sided heatsink integration or press-pack module replacement. | Select only when retrofitting PCB-mounted legacy designs requiring isolation and lower assembly complexity. |
| SKKH 475/36 | VRRM = 3600 V, IFAVM = 475 A, but includes integrated gate driver interface; designed as thyristor/diode hybrid. | Supports phase-controlled rectification; not a drop-in replacement for uncontrolled rectifier use cases. | Choose only when active commutation or firing-angle control is required in the target system architecture. |
Compared with DD475N36K and SKKH 475/36, D475N36BXPSA1 uniquely delivers double-sided thermal extraction, pressure-contact reliability, and true press-pack mechanical compatibility - essential for high-power modular rectifier stacks where thermal density and long-term mechanical integrity are critical.
Availability
D475N36BXPSA1 is available at Aetrix Electronics and suitable for railway traction rectifiers, industrial HVDC power supplies, metallic arc furnace excitation, and renewable energy grid interface systems requiring stable component supply across multi-year production cycles.
Supply support for D475N36BXPSA1 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 AG is a German semiconductor manufacturer specializing in power electronics, automotive ICs, and security solutions, with roots in Siemens' semiconductor division.
D475N36BXPSA1 belongs to the former EUPEC high-power discrete portfolio, engineered for ultra-high-voltage industrial rectification and designed to operate reliably in harsh thermal and mechanical environments including traction, metallurgy, and energy infrastructure.
FAQ
What is the correct mounting torque for the anode stud?
The anode stud (M24 x 1.5) must be tightened to 60 Nm using a calibrated torque wrench and appropriate anti-seize compound. Under-torque risks thermal interface degradation and localized hot spots; over-torque may deform the copper baseplate or damage internal pressure contact. Mounting flatness tolerance is ±0.05 mm across the 70 mm² contact area.
Can D475N36BXPSA1 be used in series-string configurations?
Yes, but only with active voltage balancing using RC snubbers and matched dynamic characteristics. The device's 40 mA max reverse leakage at 160 °C requires careful derating and parallel RC networks (e.g., 0.68 µF + 5.6 Ω per diode) to ensure equal voltage distribution. Static balancing resistors alone are insufficient for long-term reliability.
Does this diode require forced cooling?
Yes - sustained operation above 200 A IFAV requires forced-air or liquid cooling due to its 0.085 °C/W RthJC and 160 °C max junction temperature. Natural convection is inadequate; thermal interface material (TIM) with <0.1 W/m·K resistance must be applied between both anode and cathode surfaces and their respective heatsinks.
What is the creepage distance and why does it matter?
The creepage distance is 21 mm, compliant with DIN 40040 Class C humidity requirements. This spacing prevents surface tracking and flashover in high-humidity or contaminated environments - critical for outdoor rectifier cabinets, marine installations, and steel mill facilities where condensation and conductive dust are present.
D475N36BXPSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- DO-205AA, DO-8, Stud
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 3600 V
- Current - Average Rectified (Io):
- 475A
- Voltage - Forward (Vf) (Max) @ If:
- -
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 40 mA @ 3600 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Stud Mount
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -40°C ~ 160°C
D475N36BXPSA1 FAQ
1.How can I place an order for D475N36BXPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for D475N36BXPSA1 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 D475N36BXPSA1 reliable?
The price and inventory of D475N36BXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D475N36BXPSA1 is usually 5 days.
3.What payment methods are accepted for D475N36BXPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D475N36BXPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D475N36BXPSA1?
D475N36BXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D475N36BXPSA1 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 D475N36BXPSA1?
For technical support, including D475N36BXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D475N36BXPSA1 requirements.
6.How does Aetrix verify that D475N36BXPSA1 is sourced from the original manufacturer or authorized distributors?
All D475N36BXPSA1 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 D475N36BXPSA1 meets industry standards.
7.What is the process for return or replacement of D475N36BXPSA1?
All D475N36BXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with D475N36BXPSA1, 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 D475N36BXPSA1 part is unused and in its original packaging.
Return procedure for D475N36BXPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
D475N36BXPSA1 Tags
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