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Infineon Technologies D251N20BXPSA1
- Part No.:
- D251N20BXPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single Diodes
- Package:
- DO-205AA, DO-8, Stud
- Datasheet:
-
D251N20BXPSA1.pdf
- Description:
- DIODE GEN PURP 2KV 255A
- Quantity:
- Payment:
- Shipping:
Inventory:8,146
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Product details
Overview
D251N20BXPSA1 from Infineon Technologies (formerly EUPEC) is a press-pack, stud-mounted power rectifier diode rated for 2000 V repetitive peak reverse voltage (VRRM), 250 A mean forward current (IFAVM) at 130 °C case temperature, and 6.3 kA non-repetitive surge current (IFSM). It features silicon pellet with pressure contact, anode-to-case polarity, and is designed for high-power industrial DC supply systems in traction converters and medium-voltage rectification.
For engineers reviewing the D251N20BXPSA1 datasheet, D251N20BXPSA1 pinout, D251N20BXPSA1 application, or D251N20BXPSA1 equivalent, key selection criteria include verified VRRM = 2000 V, IFAVM = 250 A @ tc = 130 °C, RthJC = 0.145 °C/W (DC), VT ≤ 1.57 V @ 800 A, and clamping force of 3.5 kN for reliable thermal interface in dual-sided cooled assemblies.
Technical Context
This device is a unidirectional, hermetically sealed, press-pack diode with anode-integrated metal case and isolated cathode terminal. Its design enables bidirectional heat dissipation via copper braid leads (25 mm² E-Cu-rope) and silicon tubing insulation, supporting two-sided cooling configurations per Fig. 7 transient ZthJC curves.
It operates with a threshold voltage VT(TO) of 0.8 V and slope resistance rT of 0.85 mΩ at maximum junction temperature (180 °C), delivering low conduction loss under high-current DC or phase-controlled rectifier duty cycles with 10 ms surge capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 2000 V - Maximum repetitive reverse blocking voltage; defines usable DC bus voltage headroom in 1.5 kV-class industrial rectifiers. |
| IFAVM | 250 A @ tc = 130 °C - Continuous forward current rating under specified heatsink thermal condition; determines steady-state power handling. |
| IFSM | 6.3 kA @ tp = 10 ms, tvj = 25 °C - Short-circuit withstand capability; critical for fault ride-through in motor drive front-ends. |
| RthJC (DC) | 0.145 °C/W - Junction-to-case thermal resistance under DC bias; used to calculate max junction temp rise with measured case temp. |
| VT max | 1.57 V @ iF = 800 A, tvj = 180 °C - Peak forward voltage drop; directly impacts conduction loss and thermal design margin. |
| Qr | Not specified in provided data - Reverse recovery charge not listed; device is non-fast recovery, intended for line-frequency applications only. |
| Clamping force | 3.5 kN - Required mechanical load for case-design E/F; ensures stable thermal contact and prevents delamination under thermal cycling. |
Pinout & Package
Package: Press-pack stud-mount module with integrated anode case (case = anode), isolated cathode terminal, and M12 threaded stud. Dimensions: Ø23 mm pellet (for VRRM = 2000 V), overall weight ≈175 g, creepage distance 12 mm, humidity class C per DIN 40040.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Case) | Main current input / heat path | Electrically active anode terminal; serves as primary thermal interface to heatsink; requires insulated mounting when cathode-side cooling is used. |
| Cathode (Stud) | Main current output | Isolated M12 threaded stud; carries full forward current and must be torqued to 20 Nm; electrically referenced to system negative/return rail. |
| Temperature sensing bore | Thermal monitoring port | 3.2 × 15 mm bore for embedded thermistor or RTD; enables closed-loop junction temperature estimation in safety-critical drives. |
Key Features
| Feature | Design Value |
|---|---|
| Two-sided cooling support | Validated by transient ZthJC curves (Fig. 7, curve 1); enables 25 % lower effective thermal resistance vs. single-sided mounting. |
| High surge robustness | I²t = 198.5 kA²s @ 10 ms, 25 °C - exceeds IEC 60747-2 short-circuit test requirements for Class H rectifiers. |
| Pressure-contact Si pellet | Ø23 mm silicon die with controlled mechanical interface - eliminates wirebond fatigue and enables >10⁶ thermal cycles in traction inverters. |
| Integrated thermal sensing port | Drilled 3.2 × 15 mm bore aligned to junction region - allows direct measurement of case temperature near active area, improving thermal model accuracy. |
Applications
| Rail Traction Rectifier | Industrial HVDC Power Supply |
|---|---|
Use Scenario: AC-fed 3-level rectifier stage in main converter of 1.5 kV DC metro propulsion system. IC Role / Device Role / Timing Role: Main power rectifier diode in uncontrolled six-pulse bridge; conducts during positive half-cycle of line voltage. Use Value: 2000 V VRRM provides 33 % voltage margin over 1.5 kV DC link; 250 A IFAVM supports continuous 300 kW operation with forced-air heatsinking. | Use Scenario: Primary rectification in electroplating power supply delivering 200 A DC at 120 V. IC Role / Device Role / Timing Role: Line-frequency diode in center-tapped transformer secondary rectifier; handles full-load RMS current with minimal conduction loss. Use Value: 0.145 °C/W RthJC (DC) enables stable 125 °C junction temp at 200 A with 50 °C heatsink; 1.57 V VT limits conduction loss to <315 W per device. |
| Medium-Voltage UPS Input Stage | Wind Turbine Grid-Side Converter |
Use Scenario: Input rectifier in 690 VAC grid-tied UPS with regenerative braking capability. IC Role / Device Role / Timing Role: Uncontrolled rectifier in anti-parallel pair configuration; blocks reverse voltage during regeneration. Use Value: 180 °C tvj max and 30 mA IR @ VRRM ensure reliability under sustained overvoltage transients common in utility-grade UPS systems. | Use Scenario: Passive rectification in doubly-fed induction generator (DFIG) stator-side converter. IC Role / Device Role / Timing Role: High-current freewheeling and rectification element in LCL-filtered 690 VAC interface. Use Value: 3.5 kN clamping force maintains contact integrity across -40…+180 °C operating range; 12 mm creepage meets IEC 61800-5-1 pollution degree 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage, high-current rectifier diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IXYS D251N200 | VRRM = 2000 V, IFAVM = 250 A, RthJC = 0.15 °C/W, same press-pack E/F case but uses Mo-molybdenum interposer instead of direct Cu contact. | Higher thermal impedance under pulse conditions due to interposer layer; less suitable for 100 % duty-cycle DC applications. | Select if legacy IXYS ecosystem compatibility or availability trumps marginal thermal advantage. |
| Mitsubishi CM250DY-24A | VRRM = 2400 V, IFAVM = 250 A, RthJC = 0.16 °C/W, bolt-down package with separate anode/cathode terminals (no case-as-anode). | Requires external insulating hardware; lacks integrated temperature bore; better suited for modular multi-die stacks than single-device rectifiers. | Select when higher voltage margin (2400 V) is mandatory and mechanical redesign for isolated terminals is acceptable. |
Compared with D251N20BXPSA1, D251N200 offers identical ratings but slightly higher thermal resistance under transient conditions, while CM250DY-24A trades integrated thermal sensing and anode-case simplicity for extended voltage rating and modularity-making D251N20BXPSA1 optimal for space-constrained, thermally demanding single-device rectifier designs.
Availability
D251N20BXPSA1 is available at Aetrix Electronics and suitable for rail traction rectifiers, industrial HVDC power supplies, medium-voltage UPS input stages, and wind turbine grid-side converters requiring stable component supply and long-lifecycle support.
Supply support for D251N20BXPSA1 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 semiconductors, automotive ICs, and security solutions, with global R&D and manufacturing infrastructure.
D251N20BXPSA1 belongs to Infineon's high-power press-pack diode product line, engineered for ruggedized, high-efficiency rectification in mission-critical industrial and transportation systems where reliability under thermal and mechanical stress is paramount.
FAQ
What is the maximum allowable junction temperature for D251N20BXPSA1?
The maximum junction temperature (tvj max) is 180 °C, as specified in the electrical properties table. This rating applies under all operating conditions including repetitive and non-repetitive surge events. Operation above this temperature risks irreversible degradation of the silicon die and pressure-contact interface.
Does D251N20BXPSA1 have reverse recovery characteristics suitable for high-frequency switching?
No. D251N20BXPSA1 is a standard power rectifier diode without optimized soft recovery; its Qr (reverse recovery charge) is not characterized in the datasheet, and it is intended exclusively for line-frequency (50/60 Hz) or low-frequency phase-controlled rectification-not for PWM or high-frequency chopper circuits.
How is thermal performance affected when using only anode-side cooling?
When cooled only on the anode side (case), the transient thermal impedance ZthJC increases significantly-Fig. 7 shows curve 2 rising ~2.5× above curve 1 (two-sided) at 1 s. For DC operation, RthJC rises from 0.145 °C/W to 0.151 °C/W, reducing safe current derating by ~3 % at 130 °C case temperature.
Can D251N20BXPSA1 be paralleled with other diodes for higher current capacity?
Yes, but only with strict matching: identical VRRM, VT, and rT within ±5 %, plus matched thermal mounting (same torque, interface material, heatsink flatness). Parallel operation requires individual snubbers and current-sharing resistors; mismatched devices risk thermal runaway due to positive temperature coefficient of VT.
D251N20BXPSA1 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):
- 2000 V
- Current - Average Rectified (Io):
- 255A
- Voltage - Forward (Vf) (Max) @ If:
- -
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 30 mA @ 2000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Stud Mount
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -40°C ~ 180°C
D251N20BXPSA1 FAQ
1.How can I place an order for D251N20BXPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for D251N20BXPSA1 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 D251N20BXPSA1 reliable?
The price and inventory of D251N20BXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D251N20BXPSA1 is usually 5 days.
3.What payment methods are accepted for D251N20BXPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D251N20BXPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D251N20BXPSA1?
D251N20BXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D251N20BXPSA1 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 D251N20BXPSA1?
For technical support, including D251N20BXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D251N20BXPSA1 requirements.
6.How does Aetrix verify that D251N20BXPSA1 is sourced from the original manufacturer or authorized distributors?
All D251N20BXPSA1 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 D251N20BXPSA1 meets industry standards.
7.What is the process for return or replacement of D251N20BXPSA1?
All D251N20BXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with D251N20BXPSA1, 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 D251N20BXPSA1 part is unused and in its original packaging.
Return procedure for D251N20BXPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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