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Infineon Technologies D371S45TXPSA1
- Part No.:
- D371S45TXPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single Diodes
- Package:
- DO-200AB, B-PUK
- Datasheet:
-
D371S45TXPSA1.pdf
- Description:
- DIODE GEN PURP 4.5KV 510A
- Quantity:
- Payment:
- Shipping:
Inventory:5,369
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Product details
Overview
D371S45TXPSA1 from eupec (Infineon Technologies) is a fast recovery power rectifier diode designed for high-voltage, high-current industrial DC link and phase-controlled rectification circuits. It delivers 4500 V repetitive peak reverse voltage (VRRM), 800 A RMS forward current (IFRMSM), and 6000 A non-repetitive surge current (IFSM), with typical forward recovery voltage of 150 V under 1000 A/µs di/dt - used in medium-frequency traction inverters and HVDC converter valves.
For engineers reviewing the D371S45TXPSA1 datasheet, D371S45TXPSA1 pinout, D371S45TXPSA1 application, or D371S45TXPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.035 °C/W anode side), 125 °C max junction temperature, low forward slope resistance (1.49 mΩ), and verified 1250 µAs recovered charge under standardized test conditions (iFM = 1000 A, -diF/dt = 250 A/µs).
Technical Context
This diode employs a planar passivated silicon structure optimized for fast soft recovery and low switching losses in line-commutated converters. Its 125 °C maximum junction temperature and two-sided cooling capability support continuous operation at 510 A mean forward current (IFAvm) when case temperature is held at 51 °C at 50 Hz.
The device exhibits controlled reverse recovery behavior with peak reverse recovery current (IRM) ≤ 500 A and recovered charge (Qr) ≤ 1250 µAs under defined test circuit conditions (CS = 0.125 µF, RS = 6 Ω), enabling predictable snubber design and reduced EMI in high-power thyristor-diode hybrid bridges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 4500 V - supports 3.3 kV AC line-fed rectifiers with 1.36× safety margin |
| IFRMSM | 800 A - enables compact heatsink sizing in forced-air-cooled 2 MW DC link applications |
| IFAVM (tC=51°C) | 510 A - defines continuous conduction capability in dual-sided cooled industrial drives |
| (-diF/dt)com | 1000 A/µs - specifies maximum controllable turn-off decay rate without oscillation |
| rT | 1.49 mΩ - determines conduction loss contribution (I²×rT) at rated RMS current |
| Qr | 1250 µAs - sets snubber energy requirement and influences commutation failure risk |
| RthJC (anode) | 0.035 °C/W - defines minimum thermal interface conductance needed to maintain Tj ≤ 125 °C |
Pinout & Package
Package: Press-fit stud-mount ceramic/metal housing (outline per S 3: ∅58 mm ±0.5 mm diameter, ∅34 mm −0.1 mm base, two ∅3.5 mm × 4.0 mm center mounting holes, 30 mm creepage, 20 mm air distance, 250 g typical weight).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (stud) | Main current entry terminal | Press-fit copper stud with 10–16 kN clamping force; serves as primary thermal path to heatsink |
| Cathode (base plate) | Main current exit terminal | Flat metal base plate with two M4 mounting holes; provides secondary thermal path and mechanical anchoring |
Key Features
| Feature | Design Value |
|---|---|
| Soft reverse recovery | Peak IRM ≤ 500 A and Qr ≤ 1250 µAs ensure low-voltage overshoot during commutation in thyristor-based converters |
| Two-sided cooling interface | Separate RthJC values (0.035 °C/W anode, 0.070 °C/W cathode) enable asymmetric heatsink design for space-constrained installations |
| High surge robustness | 6000 A IFSM at 10 ms supports short-circuit ride-through in motor drive DC links without fusing |
| Controlled forward voltage profile | V(TO) = 2.00 V and rT = 1.49 mΩ allow accurate conduction loss modeling across 0–1200 A operating range |
Applications
| Industrial Medium-Voltage Rectifiers | Traction Inverter DC Links |
|---|---|
Use Scenario: 6-pulse rectifier bridge feeding 2.5 kV DC bus in rolling stock auxiliary power supply. IC Role / Device Role / Timing Role: Fast recovery diode providing unidirectional conduction and commutation path for line-commutated thyristors. Use Value: 1000 A/µs (-diF/dt)com rating ensures stable turn-off without voltage spikes during 50 Hz grid commutation. | Use Scenario: Braking energy regeneration circuit in 3.3 kV railway traction inverter. IC Role / Device Role / Timing Role: High-current freewheeling diode handling regenerative current surges up to 6000 A. Use Value: 6000 A IFSM and 0.035 °C/W RthJC (anode) sustain 100 ms overloads without thermal runaway. |
| HVDC Converter Valves | High-Power Induction Heating |
Use Scenario: Valve-level anti-parallel diode pair in 4500 V LCC-based HVDC transmission system. IC Role / Device Role / Timing Role: Bidirectional voltage blocking element with 4600 V VRSM rating for fault transient suppression. Use Value: 4600 V non-repetitive peak reverse voltage exceeds system lightning impulse level by 2.3×. | Use Scenario: Series-resonant inverter output stage operating at 1–10 kHz for metal melting furnaces. IC Role / Device Role / Timing Role: Fast recovery diode enabling zero-voltage switching in hard-switched resonant topologies. Use Value: 150 V VFRM (typ.) limits snubber dissipation and improves overall inverter efficiency above 5 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast high-voltage rectifier diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DD450N45K | Higher VRRM (4500 V same), but lower IFRMSM (720 A vs. 800 A); RthJC (anode) = 0.042 °C/W | Suitable for lower RMS current density designs; requires larger heatsink area for same thermal load | Select when footprint compatibility with Semikron SKiiP modules is required |
| SKKD1000/45 | Same VRRM and IFRMSM, but higher Qr (1450 µAs vs. 1250 µAs); single-sided cooling only | Better suited for chassis-mounted single-heatsink configurations; less tolerant of asymmetrical thermal loading | Select when integrated press-fit mounting and dual thermal paths are not needed |
Compared with DD450N45K and SKKD1000/45, D371S45TXPSA1 offers superior thermal performance via two-sided cooling and lowest recovered charge, making it optimal for space-constrained, high-efficiency HVDC and traction systems where thermal management and commutation predictability are critical.
Availability
D371S45TXPSA1 is available at Aetrix Electronics and suitable for industrial medium-voltage rectifiers, traction inverter DC links, and HVDC converter valves requiring stable component supply and long-term production continuity.
Supply support for D371S45TXPSA1 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
eupec was a German semiconductor manufacturer specializing in high-power discrete devices, later fully integrated into Infineon Technologies in 2001.
D371S45TXPSA1 belongs to eupec's legacy "D" series of stud-mount fast recovery diodes, engineered specifically for line-commutated high-voltage power conversion in rail traction, industrial drives, and energy transmission systems.
FAQ
What is the maximum allowable clamping force during mounting?
The D371S45TXPSA1 requires a controlled mechanical clamp force between 10 kN and 16 kN applied to the anode stud. Exceeding 16 kN risks ceramic insulator fracture or metallization damage, while forces below 10 kN increase thermal resistance and may cause premature thermal runaway under full-load operation.
Can this diode be used in single-sided cooling configurations?
Yes, but with derating: the cathode-side RthJC is 0.070 °C/W (vs. 0.035 °C/W anode-side), so single-sided cooling reduces maximum sustainable IFAVM by ~35% at tC = 51 °C. Full-rated current requires two-sided heatsinking per datasheet thermal model.
Is the 1250 µAs Qr value measured or guaranteed?
The 1250 µAs Qr is the upper limit of the scatter range (Richtwert für obere Streubereichsgrenze) per the original technical note, meaning all units are tested and binned to ensure Qr does not exceed this value under the specified test conditions (iFM = 1000 A, -diF/dt = 250 A/µs, vR = 1000 V, CS = 0.125 µF, RS = 6 Ω).
Does this device meet RoHS or REACH requirements?
As a pre-2006 eupec product, D371S45TXPSA1 predates mandatory RoHS compliance; it contains leaded solder in internal interconnects and may contain other substances restricted under current EU directives. For compliant alternatives, contact Aetrix Technical Support for Infineon's modern equivalent portfolio.
D371S45TXPSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- DO-200AB, B-PUK
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 4500 V
- Current - Average Rectified (Io):
- 510A
- Voltage - Forward (Vf) (Max) @ If:
- 3.9 V @ 1200 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 mA @ 4500 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Clamp On
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -40°C ~ 125°C
D371S45TXPSA1 FAQ
1.How can I place an order for D371S45TXPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for D371S45TXPSA1 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 D371S45TXPSA1 reliable?
The price and inventory of D371S45TXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D371S45TXPSA1 is usually 5 days.
3.What payment methods are accepted for D371S45TXPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D371S45TXPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D371S45TXPSA1?
D371S45TXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D371S45TXPSA1 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 D371S45TXPSA1?
For technical support, including D371S45TXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D371S45TXPSA1 requirements.
6.How does Aetrix verify that D371S45TXPSA1 is sourced from the original manufacturer or authorized distributors?
All D371S45TXPSA1 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 D371S45TXPSA1 meets industry standards.
7.What is the process for return or replacement of D371S45TXPSA1?
All D371S45TXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with D371S45TXPSA1, 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 D371S45TXPSA1 part is unused and in its original packaging.
Return procedure for D371S45TXPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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