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Infineon Technologies ND171N18KHPSA1
- Part No.:
- ND171N18KHPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single Diodes
- Package:
- Module
- Datasheet:
-
ND171N18KHPSA1.pdf
- Description:
- DIODE GEN PURP 1.8KV 171A PB34-1
- Quantity:
- Payment:
- Shipping:
Inventory:4,302
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Product details
Overview
ND171N18KHPSA1 from Semikron is a press-pack dual-diode rectifier module rated for 1800 V repetitive peak reverse voltage (VRRM), 171 A average on-state current (IFAVM) at TC = 100°C, and 270 A RMS on-state current (IFRMSM), designed for high-power industrial AC/DC conversion in six-pulse bridge configurations.
For engineers reviewing the ND171N18KHPSA1 datasheet, ND171N18KHPSA1 pinout, ND171N18KHPSA1 application, or ND171N18KHPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.126 °C/W per arm), surge current capability (5600 A at Tvj max), and AlN-ceramic internal insulation for high-voltage isolation in traction and medium-voltage drives.
Technical Context
This dual-diode module uses silicon pressure-contact construction with aluminum nitride (AlN) internal insulation, enabling operation up to 150 °C junction temperature and 3.0 kV RMS insulation test voltage. It supports both natural and forced-air cooling via heatsink types KM17 (60W) and KM17 (Papst 4650), respectively.
The device delivers low conduction loss: maximum forward voltage of 1.26 V at 500 A and Tvj max, with threshold voltage (V(TO)) of 0.75 V and slope resistance (rT) of 0.8 mΩ - optimized for high-efficiency, high-current rectification in B6 bridge topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1800 V - maximum repetitive reverse blocking voltage per diode arm |
| IFAVM | 171 A - continuous average forward current per arm at TC = 100°C |
| IFRMSM | 270 A - RMS forward current rating per arm under sinusoidal conduction |
| RthJC (per arm) | 0.126 °C/W - thermal resistance from junction to case under DC conditions |
| vF max | 1.26 V - maximum forward voltage drop at 500 A and Tvj max |
| VRSM | 1900 V - non-repetitive peak reverse voltage withstand capability |
| I²t (tP=10 ms) | 157,000 A²s - surge energy handling capacity at maximum junction temperature |
Pinout & Package
ND171N18KHPSA1 is housed in a press-pack module with two isolated diode arms. Electrical terminals are arranged as anode–cathode pairs per arm, mounted via M2 torque screws (6 Nm ±10%) for power connections and M1 screws (6 Nm ±15%) for mechanical mounting. Internal AlN ceramic provides galvanic isolation between arms and case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (A1) | Input terminal for diode arm 1 | Connects to AC phase input in B6 bridge; rated for full 171 A IFAVM |
| Cathode 1 (K1) | Output terminal for diode arm 1 | Feeds positive DC bus; electrically isolated from A2/K2 by AlN substrate |
| Anode 2 (A2) | Input terminal for diode arm 2 | Second AC phase input; independent thermal path with RthJC = 0.126 °C/W |
| Cathode 2 (K2) | Output terminal for diode arm 2 | Completes dual-arm configuration; enables symmetrical current sharing in parallel modules |
Key Features
| Feature | Design Value |
|---|---|
| AlN ceramic internal insulation | Enables 3.0 kV RMS isolation and stable thermal performance up to 150 °C junction temperature |
| Pressure-contact Si pellet design | Eliminates wire bonds and solder layers, improving thermal cycling reliability and current sharing in parallel operation |
| Low slope resistance (rT) | 0.8 mΩ minimizes conduction losses at high load currents, reducing heatsink requirements in 6-pulse rectifiers |
| Transient thermal impedance model | Published ZthJC analytical function (ΣRthn·(1−e^(−t/τn))) supports accurate dynamic thermal simulation in drive control systems |
Applications
| Industrial Medium-Voltage Drives | Traction Rectifier Systems |
|---|---|
Use Scenario: Six-pulse rectification in 3.3 kV AC-fed variable-frequency drives for mining conveyors and rolling mills. IC Role / Device Role / Timing Role: Dual-diode arm provides half-wave conduction per phase pair; operates in B6 topology with natural or forced-air cooling. Use Value: 171 A IFAVM and 0.126 °C/W RthJC enable compact heatsink integration while maintaining <150 °C junction temperature under continuous load. | Use Scenario: Line-side rectification in rail vehicle auxiliary converters feeding 110 V DC control buses. IC Role / Device Role / Timing Role: Press-pack diode module handles regenerative braking surges and line transients in EN 50155-compliant environments. Use Value: 5600 A IFSM (at Tvj max) and 157,000 A²s I²t ensure robustness against short-duration grid faults without derating. |
| High-Power UPS Input Stages | Renewable Energy Grid Interfaces |
Use Scenario: Input rectifier stage in 500 kVA three-phase UPS systems requiring high reliability and low maintenance. IC Role / Device Role / Timing Role: Dual-arm configuration supports redundant parallel operation; AlN isolation prevents cross-arm failure propagation. Use Value: 310 g module weight and 15 mm creepage distance meet UL 62368-1 clearance requirements for Class 2 installations. | Use Scenario: Grid-tied rectification in solar central inverters and wind turbine converters interfacing MV transformers. IC Role / Device Role / Timing Role: High VRRM (1800 V) and VRSM (1900 V) support direct connection to 1.2 kV AC grids with safety margin. Use Value: 20 mA max reverse leakage at VRRM ensures minimal standby loss during nighttime or low-wind periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage, high-current rectifier module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SKD171/18A | Same VRRM (1800 V), but lower IFAVM (150 A) and higher RthJC (0.145 °C/W per arm) | Suitable for lower-duty-cycle applications; less suited for continuous 171 A operation | Select when thermal margin exists and cost sensitivity outweighs peak current demand |
| DD171N18K | Identical electrical ratings, but uses standard package (not HPSA1 variant); lacks enhanced creepage and vibration specs | Not qualified for rail vibration (50 m/s²) or extended creepage (15 mm) | Prefer ND171N18KHPSA1 for EN 50155 or harsh-environment deployments |
Compared with SKD171/18A and DD171N18K, ND171N18KHPSA1 delivers superior thermal performance (0.126 vs. 0.145 °C/W), certified mechanical robustness (50 m/s² vibration), and extended creepage (15 mm), making it optimal for mission-critical industrial and traction rectification where reliability under thermal and mechanical stress is non-negotiable.
Availability
ND171N18KHPSA1 is available at Aetrix Electronics and suitable for industrial medium-voltage drives, traction rectifier systems, and high-power UPS input stages requiring stable component supply and long-term lifecycle assurance.
Supply support for ND171N18KHPSA1 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
Semikron is a German power semiconductor manufacturer specializing in high-reliability modules for industrial, traction, and renewable energy applications since 1951.
This part belongs to Semikron's ND-series press-pack rectifier modules, engineered for high-current, high-voltage AC/DC conversion in demanding environments where thermal stability and galvanic isolation are critical.
FAQ
What is the maximum allowable case temperature for ND171N18KHPSA1?
The maximum allowable case temperature is not specified as a standalone limit; instead, the device is rated for continuous operation at TC = 100°C to deliver its full 171 A IFAVM. Junction temperature must remain ≤150 °C, and thermal design must account for RthJC = 0.126 °C/W per arm and RthCH = 0.06 °C/W per arm to ensure safe operation under load.
Does ND171N18KHPSA1 require forced-air cooling?
No - ND171N18KHPSA1 supports both natural and forced-air cooling. With KM17 (60W) heatsink under natural convection, it sustains rated current in B6 configuration; forced-air cooling (KM17 + Papst 4650) increases output current capability and reduces thermal resistance to ambient, enabling higher power density in space-constrained designs.
Can ND171N18KHPSA1 be used in parallel configurations?
Yes - its pressure-contact Si pellet design and matched thermal impedance (RthJC = 0.126 °C/W per arm) enable stable current sharing in parallel operation. Proper mounting torque (6 Nm ±10% on M2 terminals), uniform heatsink contact, and symmetrical busbar layout are required to maintain balance within ±5% current distribution across paralleled modules.
What does "HPSA1" signify in the part number ND171N18KHPSA1?
"HPSA1" denotes Semikron's high-performance specification variant: H = high isolation, P = press-pack, S = special creepage (15 mm), A1 = qualification to extended mechanical vibration (50 m/s² at 50 Hz) and storage/operating temperature range (−40°C to +150°C), distinguishing it from standard DD171N18K versions.
ND171N18KHPSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- Module
- Packaging:
- Tray
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1800 V
- Current - Average Rectified (Io):
- 171A
- Voltage - Forward (Vf) (Max) @ If:
- -
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 20 mA @ 1800 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- BG-PB34-1
- Operating Temperature - Junction:
- -40°C ~ 135°C
ND171N18KHPSA1 FAQ
1.How can I place an order for ND171N18KHPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ND171N18KHPSA1 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 ND171N18KHPSA1 reliable?
The price and inventory of ND171N18KHPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ND171N18KHPSA1 is usually 5 days.
3.What payment methods are accepted for ND171N18KHPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ND171N18KHPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ND171N18KHPSA1?
ND171N18KHPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ND171N18KHPSA1 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 ND171N18KHPSA1?
For technical support, including ND171N18KHPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ND171N18KHPSA1 requirements.
6.How does Aetrix verify that ND171N18KHPSA1 is sourced from the original manufacturer or authorized distributors?
All ND171N18KHPSA1 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 ND171N18KHPSA1 meets industry standards.
7.What is the process for return or replacement of ND171N18KHPSA1?
All ND171N18KHPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with ND171N18KHPSA1, 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 ND171N18KHPSA1 part is unused and in its original packaging.
Return procedure for ND171N18KHPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ND171N18KHPSA1 Tags
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