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Infineon Technologies D1481N68TXPSA1
- Part No.:
- D1481N68TXPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single Diodes
- Package:
- DO-200AC, K-PUK
- Datasheet:
-
D1481N68TXPSA1.pdf
- Description:
- DIODE GEN PURP 6.8KV 2200A
- Quantity:
- Payment:
- Shipping:
Inventory:9,056
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Product details
Overview
D1481N68TXPSA1 from Infineon Technologies is a high-voltage, high-current press-pack silicon rectifier diode designed for medium-voltage converter and crowbar applications. It delivers 6800 V repetitive peak reverse voltage (VRRM), 1590 A average on-state current at 100 °C (IFAVM), and 28 kA surge current capability (IFSM), housed in a hermetically sealed ceramic package with dual-sided cooling interface.
For engineers reviewing the D1481N68TXPSA1 datasheet, D1481N68TXPSA1 pinout, D1481N68TXPSA1 application, or D1481N68TXPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (14 K/kW), threshold voltage (0.75 V), slope resistance (0.42 mΩ), clamping force range (15–36 kN), and reverse recovery charge (11 mAs at 1000 V).
Technical Context
This device is a two-terminal, unidirectional power semiconductor optimized for forced-cooled, high-reliability industrial rectification. Its pressure-contact Si-pellet construction enables robust thermal conduction and mechanical stability under high di/dt transients, with full 50/60 Hz blocking capability across –40 °C to +160 °C operating temperature range.
The diode exhibits low conduction losses (vF ≤ 1.80 V at 2500 A, Tvj = 160 °C) and controlled reverse recovery behavior (Qr ≤ 11 mAs, IRM ≤ 300 A at VR = 1000 V), making it suitable for pulsed-power and drive systems requiring high DC blocking stability and non-rupture case current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 6800 V - Maximum repetitive reverse voltage the diode sustains without breakdown during AC line cycles |
| IFAVM | 1590 A at TC = 100 °C - Continuous DC forward current rating under specified heatsink conditions |
| IFSM | 28000 A - Peak non-repetitive surge current capability for 10 ms, critical for fault clearing |
| V(TO) | 0.75 V - Threshold voltage defining onset of conduction; determines low-current forward drop |
| rT | 0.42 mΩ - Slope resistance governing voltage rise above threshold; sets conduction loss at high current |
| RthJC | 14 K/kW - Junction-to-case thermal resistance under two-sided DC cooling; defines thermal bottleneck |
| Qr | 11 mAs - Recovered reverse charge during turn-off; directly impacts switching loss and snubber sizing |
Pinout & Package
Hermetically sealed ceramic press-pack package with 76 mm maximum diameter, 50 mm contact diameter, and 26 mm height. Requires external clamping force of 15–36 kN for reliable thermal and electrical contact. Two-sided cooling interface with anode and cathode terminals accessible on opposite faces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Face 1) | Forward current entry point | High-current input terminal; must be mounted to heatsink with defined clamping force and thermal interface |
| Cathode (Face 2) | Forward current exit point | High-current output terminal; electrically isolated from anode via ceramic housing; enables dual-sided cooling |
Key Features
| Feature | Design Value |
|---|---|
| Full 50/60 Hz blocking over wide temperature range | Ensures stable operation in grid-connected drives and medium-voltage converters across –40 °C to +160 °C ambient |
| Hermetically sealed ceramic package | Prevents moisture ingress and contamination, enabling long-term reliability in harsh industrial environments |
| High case non-rupture current | Withstands mechanical stress during short-circuit events without housing failure, supporting crowbar protection integrity |
| Two-sided cooling interface | Enables symmetric heat extraction from both anode and cathode faces, reducing thermal gradient and hot-spot risk |
Applications
| Rectifier for Drives Applications | Medium Voltage Converters |
|---|---|
Use Scenario: AC-to-DC conversion in large industrial motor drives operating at 3.3 kV or 6.6 kV bus levels. IC Role / Device Role / Timing Role: Main power rectifier in phase-controlled or diode-bridge front-end stages. Use Value: High VRRM and IFAVM enable compact, air-cooled or liquid-cooled bridge designs with reduced parallel device count. | Use Scenario: Grid-tied renewable energy inverters and traction converters requiring >4 kV isolation. IC Role / Device Role / Timing Role: Uncontrolled rectification stage in multi-level or cascaded H-bridge topologies. Use Value: Low rT and stable vF reduce conduction losses at rated load, improving system efficiency by ≥0.8% at full power. |
| Pulsed Power Applications | Crowbar Applications |
Use Scenario: Capacitor discharge circuits in laser drivers, electromagnetic launchers, and test equipment. IC Role / Device Role / Timing Role: High-dI/dt freewheeling or main switch path diode handling microsecond-scale pulses. Use Value: Low Qr (11 mAs) and fast IRM response minimize stored energy loss and improve pulse fidelity. | Use Scenario: Overvoltage protection in high-power UPS and generator excitation systems. IC Role / Device Role / Timing Role: Crowbar switch element triggered during fault to short-circuit DC bus and divert current. Use Value: High IFSM (28 kA) and non-rupture case withstand ensure mechanical survival during repeated fault events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DD900N68K4 | Higher VRRM (6800 V), identical IFAVM (1590 A), but lower IFSM (22 kA) and higher RthJC (16.5 K/kW) | Less suited for high-surge crowbar use; better for steady-state medium-voltage rectification | Select when thermal margin is available and surge robustness is secondary to long-term conduction stability |
| SKKH 152/68 | Same VRRM (6800 V), lower IFAVM (1300 A), higher Qr (14 mAs), and single-sided cooling only | Requires larger heatsink footprint; unsuitable for dual-sided thermal management architectures | Select when space-constrained mounting favors modular stud-mount design over press-pack integration |
Compared with DD900N68K4 and SKKH 152/68, D1481N68TXPSA1 offers superior surge robustness and dual-sided thermal performance-critical for crowbar and pulsed-power systems where transient survivability and thermal symmetry define reliability.
Availability
D1481N68TXPSA1 is available at Aetrix Electronics and suitable for medium voltage converters, pulsed power systems, industrial drive rectifiers, and crowbar protection circuits requiring stable component supply across extended production lifecycles.
Supply support for D1481N68TXPSA1 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, sensor, and automotive ICs, with leadership in high-reliability industrial power devices.
D1481N68TXPSA1 belongs to Infineon's high-power press-pack diode product line, engineered specifically for medium-voltage industrial rectification, crowbar protection, and pulsed-power applications demanding extreme thermal and surge resilience.
FAQ
What is the required clamping force for D1481N68TXPSA1 installation?
The device requires a mechanical clamping force between 15 kN and 36 kN to ensure proper thermal contact and electrical conduction across the pressure-contact Si-pellet interface. Under-clamping increases RthJC and risks hot-spot formation; over-clamping may fracture the ceramic housing. Force must be applied uniformly using calibrated torque tools per Infineon's mounting guidelines.
Does D1481N68TXPSA1 support single-sided cooling?
No-D1481N68TXPSA1 is explicitly designed for two-sided cooling, with anode and cathode terminals mounted to separate heatsinks. Its RthJC rating (14 K/kW) assumes symmetrical thermal paths. Single-sided mounting degrades thermal performance significantly and violates the datasheet's validated thermal model, risking premature junction overheating.
What is the maximum allowable junction temperature during operation?
The absolute maximum junction temperature (Tvj max) is 160 °C, as specified in the datasheet. Operation beyond this limit accelerates degradation of the Si-pellet and ceramic seal, reducing lifetime and increasing reverse leakage. Thermal design must maintain Tvj ≤ 160 °C under worst-case IFAVM and ambient conditions, verified via transient ZthJC curves.
How does reverse recovery charge (Qr) impact snubber design?
With Qr ≤ 11 mAs at VR = 1000 V, the diode demands precise snubber sizing to absorb stored charge during turn-off. Undersized snubbers cause voltage overshoot exceeding VRRM; oversized ones increase conduction loss. Snubber RC values must be tuned using the provided Qr vs. –di/dt curves (page 7) and actual circuit di/dt measurements.
D1481N68TXPSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- DO-200AC, K-PUK
- Packaging:
- Tray
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 6800 V
- Current - Average Rectified (Io):
- 2200A
- Voltage - Forward (Vf) (Max) @ If:
- 1.8 V @ 2500 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 50 mA @ 6800 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Clamp On
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -40°C ~ 160°C
D1481N68TXPSA1 FAQ
1.How can I place an order for D1481N68TXPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for D1481N68TXPSA1 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 D1481N68TXPSA1 reliable?
The price and inventory of D1481N68TXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D1481N68TXPSA1 is usually 5 days.
3.What payment methods are accepted for D1481N68TXPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D1481N68TXPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D1481N68TXPSA1?
D1481N68TXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D1481N68TXPSA1 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 D1481N68TXPSA1?
For technical support, including D1481N68TXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D1481N68TXPSA1 requirements.
6.How does Aetrix verify that D1481N68TXPSA1 is sourced from the original manufacturer or authorized distributors?
All D1481N68TXPSA1 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 D1481N68TXPSA1 meets industry standards.
7.What is the process for return or replacement of D1481N68TXPSA1?
All D1481N68TXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with D1481N68TXPSA1, 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 D1481N68TXPSA1 part is unused and in its original packaging.
Return procedure for D1481N68TXPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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