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Infineon Technologies DZ950N44KS02HPSA1
- Part No.:
- DZ950N44KS02HPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single Diodes
- Package:
- Module
- Datasheet:
-
DZ950N44KS02HPSA1.pdf
- Description:
- DIODE GEN PURP 4.4KV 950A PB70-1
- Quantity:
- Payment:
- Shipping:
Inventory:3,012
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Product details
Overview
DZ950N44KS02HPSA1 from Semikron is a press-pack dual-diode rectifier module rated for 4400 V repetitive peak reverse voltage, 950 A average on-state current at 100 °C case temperature, and 1500 A RMS on-state current, designed for high-power industrial AC/DC conversion in six-pulse bridge configurations.
For engineers reviewing the DZ950N44KS02HPSA1 datasheet, DZ950N44KS02HPSA1 pinout, DZ950N44KS02HPSA1 application, or DZ950N44KS02HPSA1 equivalent, key selection criteria include VRRM=4400 V, IFAVM=950 A, RthJC=0.0405 °C/W, Qr recovery charge under di/dt stress, and pressure-contact Si pellet construction with AlN isolation.
Technical Context
This dual-arm rectifier module integrates two independent high-voltage silicon diode dies in a single press-pack housing with ceramic (AlN) internal insulation and water-cooled thermal interface. It supports both two-pulse (B2) and six-pulse (B6) bridge topologies with validated transient thermal impedance ZthJC and ZthCA models for precise junction temperature prediction.
Designed for forced-cooled operation (e.g., KW70 heatsink, 4 L/min water flow), it delivers stable conduction at 180° sinusoidal conduction angle up to 160 °C junction temperature, with threshold voltage V(TO)=0.85 V and slope resistance rT=0.28 mΩ enabling low-loss DC bus feeding in HVDC and medium-voltage drive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 4400 V - Maximum repetitive reverse blocking voltage per diode arm; defines usable DC link voltage headroom in B6 rectifiers. |
| IFAVM | 950 A - Average forward current per arm at TC=100 °C; sets continuous power rating under thermal equilibrium. |
| IFRMSM | 1500 A - RMS forward current rating; determines I²t withstand capability and thermal cycling robustness. |
| RthJC | 0.0405 °C/W - Junction-to-case thermal resistance (DC, 180° sin); enables accurate junction temp estimation with measured case temp. |
| vF max | 1.78 V - Max forward voltage at Tvj max and 3000 A; directly impacts conduction loss and cooling requirements. |
| Qr | Measured recovered charge under di/dt stress (e.g., 100–10000 A/µs); critical for snubber design and EMI control in fast-switching converters. |
| iR max | 100 mA - Max reverse leakage at VRRM and Tvj max; affects off-state power loss and system insulation coordination. |
Pinout & Package
Package: Press-pack dual-diode module with M1 (6 Nm) mechanical mounting bolts and M2 (18 Nm) terminal connection screws; AlN-ceramic insulated baseplate; weight 2750 g; creepage distance 64 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (A1) | Input terminal for first diode arm | High-current input node for one leg of B2/B6 bridge; requires torque-controlled M2 screw termination. |
| Cathode 1 (K1) | Output terminal for first diode arm | Common cathode node shared with second arm in center-tap configuration; baseplate serves as thermal and electrical reference. |
| Anode 2 (A2) | Input terminal for second diode arm | Independent high-side input for parallel or full-bridge operation; electrically isolated from A1 by AlN substrate. |
| Cathode 2 (K2) | Output terminal for second diode arm | Enables dual-output or interleaved rectification; K1/K2 may be shorted externally for single-output B6 use. |
Key Features
| Feature | Design Value |
|---|---|
| Pressure-contact Si pellet | Eliminates wire bonds and solder layers, enabling >10⁶ power cycles and stable RthJC over lifetime. |
| AlN internal insulation | Provides 3.6 kV RMS insulation test rating and superior thermal conductivity vs. alumina, reducing thermal stress gradients. |
| Transient thermal modeling support | Supplied ZthJC and ZthCA analytical R-τ networks allow precise dynamic junction temperature simulation in real-time control loops. |
| Water-cooling optimized design | Baseplate geometry and flatness tolerance (per KW70 spec) ensure uniform contact pressure and <0.01 °C/W RthCH under 4 L/min flow. |
Applications
| Industrial Medium-Voltage Drives | HVDC Transmission Converters |
|---|---|
Use Scenario: 6.6 kV AC-fed variable-speed drive for mining conveyor systems operating at 120 Hz output frequency. IC Role / Device Role / Timing Role: Dual-arm rectifier in B6 configuration supplies regulated DC link for IGBT-based inverter stage. Use Value: 4400 V VRRM ensures 20% voltage margin above 6.6 kV line-to-line peak; 950 A IFAVM sustains 1.2 MW continuous power with water cooling. | Use Scenario: Line-commutated converter station in ±320 kV bipolar HVDC link connecting offshore wind farms to mainland grid. IC Role / Device Role / Timing Role: Valve-level diode module in 12-pulse thyristor/diode hybrid converter, handling 2.5 kA DC current per valve group. Use Value: Low rT (0.28 mΩ) and high IFRMSM (1500 A) minimize conduction losses across 24-hour operation; AlN isolation meets IEC 62895 creepage requirements. |
| Railway Traction Rectifiers | Large-Scale Electrolysis Plants |
Use Scenario: Onboard 25 kV AC locomotive rectifier supplying 1200 V DC to traction inverters under regenerative braking transients. IC Role / Device Role / Timing Role: B2 half-wave rectifier arm handling asymmetric load profiles and 35 kA non-repetitive surge during fault clearing. Use Value: 35,000 A IFSM (10 ms) and 6.125×10⁶ A²s I²t withstand enable reliable fault ride-through without series fusing. | Use Scenario: 120 MW chlor-alkali electrolysis cell stack powered by 10 kA, 400 V DC supply with strict ripple tolerance (<2%). IC Role / Device Role / Timing Role: Six-pulse rectifier module in multi-module parallel array delivering ultra-low-ripple DC with passive filtering. Use Value: Tight vF matching between arms (<5% spread) and low Qr reduce harmonic distortion; RthJC consistency ensures balanced thermal aging across 20+ year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage rectifier module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SKKT 950/44 | Same VRRM (4400 V) and IFAVM (950 A), but uses solder-bonded die and lower IFRMSM (1300 A); RthJC = 0.045 °C/W. | Less suitable for high-RMS, water-cooled systems requiring >1400 A RMS; preferred where reworkability matters. | Select when field repairability or RoHS-compliant solder reflow is required; avoid for high-dI/dt snubberless designs. |
| DD950N44K | Identical ratings but single-arm configuration; requires two units for dual-arm function; RthJC = 0.042 °C/W. | Increases footprint and interconnect complexity; introduces mismatch risk in parallel current sharing. | Choose only if modular redundancy or staged commissioning justifies doubled assembly cost and space penalty. |
Compared with SKKT 950/44 and DD950N44K, DZ950N44KS02HPSA1 offers superior RMS current capacity and lower thermal resistance due to its monolithic press-pack structure, making it optimal for compact, high-efficiency water-cooled rectifiers where long-term reliability outweighs rework needs.
Availability
DZ950N44KS02HPSA1 is available at Aetrix Electronics and suitable for industrial medium-voltage drives, HVDC transmission converters, railway traction rectifiers, and large-scale electrolysis plants requiring stable component supply across multi-year production programs.
Supply support for DZ950N44KS02HPSA1 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, energy, and transportation applications, with ISO/TS 16949 and IATF 16949 certification.
This device belongs to Semikron's DZ-series press-pack rectifier modules, engineered specifically for high-power, high-voltage AC/DC conversion in harsh environments where solder fatigue and thermal cycling failure must be eliminated.
FAQ
What is the maximum allowable junction temperature for DZ950N44KS02HPSA1?
The maximum junction temperature Tvj max is 160 °C, validated under steady-state and transient conditions per the datasheet's ZthJC curves. Operation beyond this limit risks irreversible degradation of the Si die and AlN insulation, especially during overload events with insufficient cooling flow or elevated ambient temperature.
Does DZ950N44KS02HPSA1 require external snubbers?
Yes - snubbers are required for safe commutation, particularly under high di/dt conditions. The datasheet specifies Qr recovery charge measurements using R=2.7 Ω and C=1.5 µF, and recommends snubber design based on actual -di/dt values observed in the target B2/B6 circuit topology and load inductance.
Can DZ950N44KS02HPSA1 be used in air-cooled applications?
No - this module is specified for forced liquid cooling only. Its RthJC (0.0405 °C/W) and RthCH (0.01 °C/W) values assume optimal contact with a water-cooled heatsink like KW70 at 4 L/min flow. Air cooling cannot achieve the required RthCA < 0.035 °C/W to maintain Tvj ≤ 160 °C at rated IFAVM.
How is the dual-arm configuration electrically isolated?
The two diode arms are fully isolated via aluminum nitride (AlN) ceramic substrate, rated for 3.6 kV RMS insulation test voltage at 50 Hz for 1 second. This isolation allows independent voltage biasing of each arm and supports series/parallel configurations without ground-loop coupling or common-mode current paths.
DZ950N44KS02HPSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- Module
- Packaging:
- Tray
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 4400 V
- Current - Average Rectified (Io):
- 950A
- Voltage - Forward (Vf) (Max) @ If:
- -
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 mA @ 4400 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- BG-PB70-1
- Operating Temperature - Junction:
- 160°C (Max)
DZ950N44KS02HPSA1 FAQ
1.How can I place an order for DZ950N44KS02HPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for DZ950N44KS02HPSA1 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 DZ950N44KS02HPSA1 reliable?
The price and inventory of DZ950N44KS02HPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DZ950N44KS02HPSA1 is usually 5 days.
3.What payment methods are accepted for DZ950N44KS02HPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DZ950N44KS02HPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DZ950N44KS02HPSA1?
DZ950N44KS02HPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DZ950N44KS02HPSA1 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 DZ950N44KS02HPSA1?
For technical support, including DZ950N44KS02HPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DZ950N44KS02HPSA1 requirements.
6.How does Aetrix verify that DZ950N44KS02HPSA1 is sourced from the original manufacturer or authorized distributors?
All DZ950N44KS02HPSA1 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 DZ950N44KS02HPSA1 meets industry standards.
7.What is the process for return or replacement of DZ950N44KS02HPSA1?
All DZ950N44KS02HPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with DZ950N44KS02HPSA1, 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 DZ950N44KS02HPSA1 part is unused and in its original packaging.
Return procedure for DZ950N44KS02HPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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