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Vishay General Semiconductor - Diodes Division 400CNQ035
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- Part No.:
- 400CNQ035
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-244AB
- Datasheet:
-
400CNQ035.pdf
- Description:
- DIODE MOD SCHOT 35V 200A TO244AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,221
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Product details
Overview
400CNQ035 from Infineon Technologies is a center-tap, high-current Schottky rectifier module rated for 400 A total (200 A per leg), 35 V reverse voltage, 0.52 V forward voltage at 200 A and 125°C junction temperature, and operates up to 150°C. It serves as a low-loss freewheeling or output rectifier in high-power DC-DC converters and industrial welding equipment.
For engineers reviewing the 400CNQ035 datasheet, 400CNQ035 pinout, 400CNQ035 application, or 400CNQ035 equivalent, key selection criteria include its TO-244AB package thermal resistance (0.10°C/W per package), 29 kA non-repetitive surge rating, center-tap cathode configuration, and suitability for high-frequency switching with <5 nH series inductance per leg.
Technical Context
This device implements a dual-anode, common-cathode Schottky architecture with guard ring protection and high-purity epoxy encapsulation. Its barrier technology enables stable operation at 150°C junction temperature while maintaining low VF and moderate IR across temperature.
Designed for high-current DC paths, it supports rectangular waveform conduction with 50% duty cycle at TC = 114°C and withstands 10000 V/µs dv/dt. The 0.81 mΩ forward slope resistance and 10.3 nF junction capacitance per leg define its high-frequency switching behavior under hard-switched conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 35 V - Maximum DC reverse blocking voltage per leg; defines minimum system isolation margin against transients. |
| IF(AV) per leg | 200 A - Average forward current per anode leg under 50% duty cycle rectangular waveform at TC = 114°C. |
| VF @ 200 A, TJ = 125°C | 0.52 V - Confirmed forward drop per leg at rated current and elevated temperature; directly impacts conduction loss. |
| RthJC (per package) | 0.10 °C/W - Junction-to-case thermal resistance for the full module; enables high power dissipation with minimal ΔT. |
| IFSM @ 5 µs sine | 29,000 A - Peak non-repetitive surge current per leg; supports short-circuit robustness in welder or UPS inverters. |
| CT @ 5 V, 25°C | 10,300 pF - Junction capacitance per leg; sets high-frequency turn-off energy and EMI generation baseline. |
| LS per leg | 5.0 nH - Series inductance from terminal hole to mounting plane; limits di/dt-induced voltage overshoot in fast-switching topologies. |
Pinout & Package
Package: TO-244AB - Modified JEDEC outline, metal-base insulated package with two anode lugs and one common cathode lug, designed for direct heatsink mounting and high mechanical ruggedness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Input terminal for first Schottky diode leg | Carries up to 200 A average forward current; requires low-inductance busbar connection. |
| Anode 2 | Input terminal for second Schottky diode leg | Electrically isolated from Anode 1; enables center-tapped transformer secondary interface. |
| Common Cathode | Shared output node for both legs | Single low-impedance return path; must be thermally and electrically optimized for 400 A aggregate current. |
Key Features
| Feature | Design Value |
|---|---|
| Center-tap module architecture | Enables dual-leg synchronous rectification or center-tapped transformer designs without external parallel devices. |
| 150°C maximum junction temperature | Supports operation in high-ambient environments (e.g., enclosed welders or industrial SMPS) without derating. |
| Guard ring structure | Improves long-term reliability under repetitive avalanche stress and edge termination field crowding. |
| High-purity, high-temp epoxy encapsulation | Provides enhanced moisture resistance and mechanical strength during thermal cycling in harsh industrial settings. |
Applications
| Industrial DC-DC Converters | Resistance Welding Power Supplies |
|---|---|
Use Scenario: High-efficiency 48 V to 12 V step-down converter delivering >10 kW continuous output in factory automation systems. IC Role / Device Role / Timing Role: Output synchronous rectifier replacing MOSFETs; leverages low VF to reduce conduction loss at high current density. Use Value: 0.52 V VF at 200 A/125°C reduces conduction loss by ~35% versus comparable Si diodes, lowering heatsink requirements. | Use Scenario: Primary-side rectification in single-phase 500 VAC-fed capacitor-discharge welder with 20 kA peak output pulses. IC Role / Device Role / Timing Role: Freewheeling diode clamping inverter bridge during energy recovery phase; handles 29 kA surge pulses. Use Value: 29,000 A IFSM rating ensures no failure during repeated short-circuit weld cycles, eliminating need for redundant paralleling. |
| Reverse Battery Protection | Uninterruptible Power Supply (UPS) Rectifiers |
Use Scenario: 400 A battery input stage in telecom backup power system where polarity reversal must be blocked without fuse reliance. IC Role / Device Role / Timing Role: Bidirectional blocking element using common-cathode topology to prevent reverse current flow into failed battery banks. Use Value: 35 V VRRM and 1 A IR at 125°C ensure fail-safe blocking even under hot ambient and partial degradation. | Use Scenario: Input rectifier in three-phase online UPS front-end operating at 120°C case temperature with forced air cooling. IC Role / Device Role / Timing Role: High-current AC-to-DC conversion stage handling 400 A aggregate current with minimal thermal rise. Use Value: 0.10 °C/W RthJC (per package) allows stable 150°C TJ operation at 400 A, extending service life beyond standard diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VSKT400/035 | Same 35 V VRRM, TO-247-3L package; 0.55 V VF @ 200 A, 125°C; higher RthJC (0.25°C/W per leg). | Requires larger heatsink area due to higher thermal resistance; not center-tap configured. | Choose when board layout favors discrete TO-247 mounting over module baseplate integration. |
| IXYS DSSK40-03A | 30 V VRRM, dual common-cathode TO-247; 0.51 V VF @ 200 A, 125°C; 25 kA IFSM. | Limited to ≤30 V systems; lower surge rating reduces margin in welding applications. | Prefer for cost-sensitive 24–30 V systems where 35 V margin is unnecessary and center-tap topology is unused. |
Compared with VSKT400/035 and IXYS DSSK40-03A, the 400CNQ035 delivers superior thermal performance (0.10°C/W vs. ≥0.25°C/W), inherent center-tap capability for transformer-based topologies, and highest surge robustness (29 kA), making it optimal for space-constrained, high-reliability industrial rectification.
Availability
400CNQ035 is available at Aetrix Electronics and suitable for industrial DC-DC converters, resistance welding power supplies, and reverse battery protection systems requiring stable component supply and long-term production continuity.
Supply support for 400CNQ035 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 markets.
The 400CNQ... series was developed for high-current, high-temperature rectification in industrial power conversion, emphasizing low VF, rugged packaging, and extended thermal operation beyond standard Schottky limits.
FAQ
What is the maximum allowable junction temperature for the 400CNQ035?
The 400CNQ035 has a maximum junction temperature (TJ) rating of 150°C, verified per Absolute Maximum Ratings in Bulletin PD-2.264 rev. D. This rating applies under all operating conditions including DC, pulsed, and surge conduction. Operation above 150°C risks permanent degradation of the Schottky barrier and encapsulation integrity. Thermal design must ensure TJ remains ≤150°C using the specified RthJC of 0.10°C/W (per package) and measured case temperature.
Does the 400CNQ035 support center-tapped transformer configurations?
Yes, the 400CNQ035 is explicitly designed as a center-tap module with two isolated anode terminals (Anode 1 and Anode 2) and a shared common cathode terminal. This configuration directly interfaces with center-tapped secondary windings in forward, push-pull, or half-bridge transformer topologies. The internal die layout and TO-244AB pinout maintain electrical isolation between anode legs while enabling symmetrical current sharing under balanced loading.
What is the forward voltage drop of the 400CNQ035 at full rated current and elevated temperature?
The 400CNQ035 exhibits a forward voltage drop (VF) of 0.52 V per leg at 200 A and junction temperature of 125°C, as confirmed in the Electrical Specifications table of Bulletin PD-2.264 rev. D. At 400 A total device current (200 A per leg), VF rises to 0.68 V per leg under the same thermal condition. These values are measured under DC or rectangular waveform conditions and define conduction loss boundaries for thermal modeling.
How does the 400CNQ035 handle surge current events?
The 400CNQ035 is rated for 29,000 A peak non-repetitive surge current (IFSM) per leg under 5 µs sine wave conditions, per Absolute Maximum Ratings. This capability supports short-circuit protection in welders and UPS systems. The device also sustains 3400 A for 10 ms sine pulses. Its guard ring structure and high-purity epoxy encapsulation prevent localized thermal runaway during such events, ensuring repeatable surge survivability without parameter drift.
What thermal resistance values apply to the 400CNQ035 package?
The 400CNQ035 specifies two key thermal resistances: RthJC = 0.10°C/W junction-to-case for the full package (not per leg), and RthJC = 0.20°C/W per leg. The 0.10°C/W value governs total power dissipation (up to ~40 W at 150°C ΔT), while the per-leg value applies when calculating individual leg heating. RthCS (case-to-heatsink) is 0.10°C/W with smooth, greased mounting surface - critical for achieving rated current in industrial enclosures.
400CNQ035 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-244AB
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 35 V
- Current - Average Rectified (Io) (per Diode):
- 200A
- Voltage - Forward (Vf) (Max) @ If:
- 730 mV @ 400 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 20 mA @ 35 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- TO-244AB
400CNQ035 FAQ
1.How can I place an order for 400CNQ035 through Aetrix?
Please submit a Request for Quotation (RFQ) for 400CNQ035 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 400CNQ035 reliable?
The price and inventory of 400CNQ035 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 400CNQ035 is usually 5 days.
3.What payment methods are accepted for 400CNQ035?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 400CNQ035 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 400CNQ035?
400CNQ035 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 400CNQ035 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 400CNQ035?
For technical support, including 400CNQ035 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 400CNQ035 requirements.
6.How does Aetrix verify that 400CNQ035 is sourced from the original manufacturer or authorized distributors?
All 400CNQ035 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 400CNQ035 meets industry standards.
7.What is the process for return or replacement of 400CNQ035?
All 400CNQ035 units undergo pre-shipment inspection (PSI). If there is an issue with 400CNQ035, 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 400CNQ035 part is unused and in its original packaging.
Return procedure for 400CNQ035:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
400CNQ035 Tags
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BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
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BAT54S-7-F
Diodes Incorporated
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BAT54S,215
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BAS40-04LT1G
onsemi
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MMBD1503-TP
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BAV99WT1G
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