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Infineon Technologies D1961SH45TXPSA1
- Part No.:
- D1961SH45TXPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single Diodes
- Package:
- DO-200AE
- Datasheet:
-
D1961SH45TXPSA1.pdf
- Description:
- DIODE GEN PURP 4.5KV 2380A
- Quantity:
- Payment:
- Shipping:
Inventory:3,234
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Product details
Overview
D1961SH45TXPSA1 from Infineon Technologies is a press-pack, double-sided cooled, fast-recovery diode designed for high-power medium-voltage converter freewheeling and snubber applications. It delivers 4500 V repetitive peak reverse voltage (VRRM), 1830 A average forward current at TC = 85 °C (IFAVM), and withstands 40 kA surge current (IFSM) with soft turn-off behavior at di/dt up to 1000 A/µs - deployed in IGCT- and IGBT-based traction inverters and pulsed power systems.
For engineers reviewing the D1961SH45TXPSA1 datasheet, D1961SH45TXPSA1 pinout, D1961SH45TXPSA1 application, or D1961SH45TXPSA1 equivalent, key selection criteria include clamping force range (36–52 kN), two-sided thermal resistance (7.5 K/kW), reverse recovery softness factor (FRRS = 1.6), and case non-rupture current rating - all critical for high-reliability industrial drive and grid-connected converter design.
Technical Context
This diode employs a silicon pressure-contact pellet (76DSX45) with symmetrical anode/cathode metallization and is engineered for zero-external-snubber operation in hard-switched converters. Its soft reverse recovery (FRRS = 1.6) and low slope resistance (rT ≤ 0.5 mΩ) minimize voltage overshoot and switching losses during high-di/dt commutation events.
The device operates with junction temperature up to 140 °C and requires mechanical clamping between two heatsinks. Thermal impedance modeling uses seven-element ZthJC analytical functions - differing for anode-, cathode-, and two-sided cooling configurations - enabling precise transient thermal simulation in multi-pulse duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 4500 V - maximum repetitive reverse blocking voltage at junction temperature up to 140 °C; defines DC link voltage rating in 3.3 kV-class converters. |
| IFAVM @ TC=85°C | 1830 A - continuous average forward conduction capability under two-sided forced-air or liquid cooling; sets base-load current capacity. |
| IFSM (10 ms) | 40000 A - non-repetitive surge current rating; determines short-circuit robustness in fault-clearing scenarios. |
| rT | 0.5 mΩ - slope resistance at Tvj max; directly impacts forward conduction loss (Pcond ≈ I² × rT + I × VT0) at high currents. |
| FRRS | 1.6 - reverse recovery softness factor; quantifies rate-of-change of reverse current decay; ensures low EMI and reduced snubber stress. |
| RthJC (two-sided) | 7.5 K/kW - junction-to-case thermal resistance with dual heatsink contact; enables thermal design margin for 2.16 V VF at 2500 A. |
| Clamping Force | 36–52 kN - required mechanical compression range to maintain low contact resistance and prevent thermal delamination under thermal cycling. |
Pinout & Package
Package: Press-pack, double-sided cooled, disc-type diode with isolated anode and cathode metal surfaces. Diameter: 121 mm; contact diameter: 86 mm; height: 26 mm; weight: 1350 g. Requires external clamping assembly per Infineon mounting guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Surface 1) | Forward current entry point | High-current input terminal; must be thermally and electrically bonded to heatsink via conductive interface material under specified clamping force. |
| Cathode (Surface 2) | Forward current exit point | High-current output terminal; electrically isolated from Anode; forms complete conduction path with symmetric thermal path to second heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| Soft turn-off behavior | FRRS = 1.6 ensures controlled reverse recovery current decay, reducing voltage spikes and EMI in high-di/dt IGBT/IGCT commutation. |
| Full 50/60 Hz blocking stability | Guaranteed VRRM holdover across -40 °C to +140 °C junction range - essential for outdoor and uncooled auxiliary power stages. |
| High case non-rupture current | Withstands 40 kA surge without mechanical failure - validated for grid-fault ride-through in medium-voltage drives. |
| Two-sided thermal path | 7.5 K/kW RthJC enables balanced heat extraction from both terminals, supporting >2 MW/cm² power density in compact converter stacks. |
Applications
| Medium-Voltage Traction Inverters | IGCT-Based Static VAR Compensators |
|---|---|
Use Scenario: Regenerative braking and motoring in 3.3 kV rail traction systems with 4 kHz PWM switching. IC Role / Device Role / Timing Role: Freewheeling diode in anti-parallel configuration with IGCTs; handles reactive energy return during rapid deceleration. Use Value: Soft recovery (FRRS = 1.6) prevents overvoltage failure during 1000 A/µs current reversal, extending IGCT lifetime by >3× vs. standard diodes. |
Use Scenario: Reactive power compensation in 36-pulse industrial grid interfaces with harmonic filtering requirements. IC Role / Device Role / Timing Role: Snubberless freewheeling path in phase-controlled thyristor bridges; absorbs commutation energy without external RC networks. Use Value: 4500 V VRRM and 140 °C Tvj max allow direct integration into 3.3 kV AC line modules without derating in ambient >60 °C environments. |
| High-Power Pulsed Power Supplies | Wind Turbine Full-Scale Converters |
Use Scenario: Capacitor discharge circuits for electromagnetic forming and laser pumping with 10 ms pulse width and 50 Hz repetition. IC Role / Device Role / Timing Role: Main energy recirculation diode; conducts peak currents up to 2500 A with <2.5 V forward drop at Tvj = 140 °C. Use Value: 40 kA IFSM and 8000 A²s I²t rating enable single-shot operation without thermal runaway or bond-wire fusing. |
Use Scenario: Grid-side converter in 5 MW offshore wind turbines operating in salt-laden, high-humidity coastal environments. IC Role / Device Role / Timing Role: DC-link freewheeling element in NPC three-level topology; manages regenerative energy during grid faults. Use Value: DIN 40040 Class C humidity rating and 33 mm creepage distance ensure long-term insulation integrity in IP65-enclosed converter cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage, high-current freewheeling diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IXYS MDD1800-45 | Higher VRRM (4500 V same), but lower IFAVM (1500 A @ TC=85°C); uses solder-bonded TO-247 package instead of press-pack. | Not suitable for two-sided cooling or >2 MW/cm² power density; limited to air-cooled industrial drives below 2 MW. | Select only when board-level mounting and lower surge robustness are acceptable; avoid in pulsed power or traction. |
| ABB 5SDF18H4502 | Identical VRRM (4500 V) and IFAVM (1830 A), but higher RthJC (8.2 K/kW) and no published FRRS value; press-pack with single-sided cooling option. | Lacks verified soft recovery performance; requires larger heatsink footprint due to inferior thermal resistance. | Acceptable for static VAR compensation where di/dt < 500 A/µs; not recommended for IGCT traction inverters requiring FRRS ≥ 1.5. |
Compared with MDD1800-45 and 5SDF18H4502, D1961SH45TXPSA1 uniquely combines 7.5 K/kW two-sided RthJC, FRRS = 1.6, and 36–52 kN clamping specification - making it the only choice for high-di/dt, high-power-density, and high-reliability medium-voltage converter freewheeling.
Availability
D1961SH45TXPSA1 is available at Aetrix Electronics and suitable for medium-voltage traction inverters, IGCT-based static VAR compensators, and high-power pulsed power supplies requiring stable component supply, long-life thermal cycling performance, and certified clamping-force compliance.
Supply support for D1961SH45TXPSA1 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 is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy infrastructure markets.
D1961SH45TXPSA1 belongs to Infineon's "Fast Hard Drive Diode" press-pack product line, engineered specifically for zero-snubber, high-di/dt freewheeling in medium-voltage converters operating above 2.5 kV DC link.
FAQ
What is the maximum allowable clamping force for D1961SH45TXPSA1?
The device requires mechanical clamping within 36–52 kN to ensure optimal thermal contact and electrical conduction. Below 36 kN, contact resistance rises, increasing forward voltage drop and localized heating; above 52 kN risks ceramic insulator fracture or pellet deformation. Mounting must use calibrated torque tools and flat, parallel heatsink surfaces per Infineon Application Note AN2015-04.
Does D1961SH45TXPSA1 require external snubber circuits?
No - its soft reverse recovery (FRRS = 1.6) and low recovered charge (Qr ≤ 12 mAs at 2500 A) eliminate need for RC snubbers in typical IGCT and IGBT applications with di/dt ≤ 1000 A/µs. However, clamp circuits remain recommended for pulsed power designs exceeding 2800 V clamping voltage or >5000 A/µs di/dt.
Can D1961SH45TXPSA1 be used with single-sided cooling?
Yes - but with significant derating: RthJC increases to 13.3 K/kW (anode-cooled) or 17.2 K/kW (cathode-cooled), reducing IFAVM to ~1100 A at TC = 85 °C. Two-sided cooling is mandatory for full-rated 1830 A operation and thermal stability in continuous-duty converters.
What is the meaning of "TXPSA1" in the part number D1961SH45TXPSA1?
"TXPSA1" denotes Infineon's internal revision and packaging code: "T" = temperature grade (140 °C max), "X" = press-pack construction, "P" = two-sided cooling optimized, "SA" = standard anode/cathode metallization, and "1" = first revision of this mechanical variant. It does not indicate RoHS or halogen-free status - those are covered under separate compliance codes.
D1961SH45TXPSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- DO-200AE
- Packaging:
- Tray
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 4500 V
- Current - Average Rectified (Io):
- 2380A
- Voltage - Forward (Vf) (Max) @ If:
- 2.5 V @ 2500 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 150 mA @ 4500 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- 0°C ~ 140°C
D1961SH45TXPSA1 FAQ
1.How can I place an order for D1961SH45TXPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for D1961SH45TXPSA1 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 D1961SH45TXPSA1 reliable?
The price and inventory of D1961SH45TXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D1961SH45TXPSA1 is usually 5 days.
3.What payment methods are accepted for D1961SH45TXPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D1961SH45TXPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D1961SH45TXPSA1?
D1961SH45TXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D1961SH45TXPSA1 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 D1961SH45TXPSA1?
For technical support, including D1961SH45TXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D1961SH45TXPSA1 requirements.
6.How does Aetrix verify that D1961SH45TXPSA1 is sourced from the original manufacturer or authorized distributors?
All D1961SH45TXPSA1 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 D1961SH45TXPSA1 meets industry standards.
7.What is the process for return or replacement of D1961SH45TXPSA1?
All D1961SH45TXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with D1961SH45TXPSA1, 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 D1961SH45TXPSA1 part is unused and in its original packaging.
Return procedure for D1961SH45TXPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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