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Vishay General Semiconductor - Diodes Division 80CNQ040A
- Part No.:
- 80CNQ040A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- D-61-8
- Datasheet:
-
80CNQ040A.pdf
- Description:
- DIODE MODULE SCHOT 40V 40A D61-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,519
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Product details
Overview
80CNQ040A from Vishay is a center-tap Schottky rectifier module in D-61-8 through-hole package, rated for 2 × 40 A average forward current per leg, 40 V maximum DC reverse voltage, and operation up to 150 °C junction temperature. It delivers very low forward voltage drop (0.47 V at 40 A, 125 °C), high surge capability (5800 A IFSM), and is optimized for switching power supplies and reverse battery protection.
For engineers reviewing the 80CNQ040A datasheet, 80CNQ040A pinout, 80CNQ040A application, or 80CNQ040A equivalent, this device is selected for high-current, low-VF, industrial-grade DC/DC conversion where thermal robustness and low conduction loss are critical.
Technical Context
This dual-leg common-cathode Schottky rectifier uses proprietary barrier technology enabling reliable 150 °C TJ operation with moderate leakage. Its D-61-8 package features high-purity epoxy encapsulation and guard ring construction for enhanced ruggedness and moisture resistance.
The device supports high-frequency switching with low series inductance (5.5 nH) and fast dV/dt capability (10,000 V/μs), while its thermal resistance (RthJC = 0.42 °C/W per package) enables efficient heat transfer to heatsinks under sustained 80 A total load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) per leg | 40 A - supports continuous high-current output stage in 48 V telecom PSUs without forced air |
| VR (Max DC reverse) | 40 V - suitable for 36 V nominal bus systems with 20 % overvoltage margin |
| VF @ 40 A, 125 °C | 0.47 V - reduces conduction loss by ~35 % vs. standard Schottkys at same rating |
| IFSM (5 μs sine) | 5800 A - withstands severe line transients and inrush in industrial motor drives |
| RthJC (per package) | 0.42 °C/W - allows >60 W total dissipation with 25 °C heatsink rise |
| CT @ 5 V | 2600 pF - limits capacitive turn-on loss in >100 kHz SMPS designs |
| dV/dt | 10,000 V/μs - prevents false triggering in high-dV/dt gate-drive or snubber circuits |
Pinout & Package
Package: D-61-8 through-hole, 3-terminal center-tap configuration with common cathode base and two anodes. Dimensions: 37.97 mm × 10.79 mm × 16.2 mm (L × W × H), weight 7.8 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Anode 1) | Anode of first Schottky leg | Connects to primary winding tap or half-bridge output node |
| Terminal 2 (Common Cathode) | Shared cathode node for both legs | Serves as DC output return; requires low-inductance heatsink connection |
| Terminal 3 (Anode 2) | Anode of second Schottky leg | Connects to complementary winding tap or second half-bridge output |
Key Features
| Feature | Design Value |
|---|---|
| 150 °C junction rating | Enables operation in sealed industrial enclosures without derating at full current |
| Guard ring construction | Improves long-term reliability under repetitive avalanche stress (EAS = 54 mJ/leg) |
| Low-profile D-61-8 package | Reduces board space vs. TO-247 alternatives while maintaining 80 A total current capacity |
| Pb-free (PbF) termination | Meets RoHS Directive 2011/65/EU without exemptions; compatible with lead-free reflow profiles |
| Center-tap symmetry | Ensures balanced current sharing between legs in dual-phase synchronous rectification |
Applications
| Telecom Power Supply | Industrial Motor Drive |
|---|---|
Use Scenario: 48 V input, 12 V/60 A output DC/DC converter in 19″ rack-mounted telecom shelf. IC Role / Device Role / Timing Role: Output synchronous rectifier replacing MOSFETs in center-tapped transformer topology. Use Value: 0.47 V VF at 40 A reduces conduction loss by 2.8 W per leg vs. Si diodes, lowering heatsink requirements. |
Use Scenario: Regenerative braking circuit in 24–48 V BLDC motor controller with bidirectional energy recovery. IC Role / Device Role / Timing Role: Freewheeling and reverse-battery protection diode across H-bridge outputs. Use Value: 5800 A IFSM handles peak regen currents without failure; 150 °C rating sustains operation during extended overload. |
| Server VRM | EV Onboard Charger |
Use Scenario: High-density 12 V VRM for AI accelerator cards requiring >500 A aggregate output. IC Role / Device Role / Timing Role: Secondary-side rectification in multiphase center-tapped forward converter. Use Value: Dual-leg 40 A rating enables parallel phase interleaving with minimal layout asymmetry. |
Use Scenario: 3.3 kW AC/DC stage in automotive onboard charger using Vienna rectifier topology. IC Role / Device Role / Timing Role: Common-cathode Schottky for neutral-point clamping in 3-level PFC stage. Use Value: 2600 pF junction capacitance minimizes switching loss at 100 kHz; RthJC = 0.42 °C/W maintains <125 °C TJ at full load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-80CNQ040ASMPbF | D-61-8-SM surface-mount variant; identical electrical specs but different thermal path and mounting method | Requires SMT reflow and heatsink pad design; unsuitable for through-hole legacy boards | Select when board space is constrained and automated assembly is used |
| ON Semiconductor MBR8040CT | TO-220AB package; higher RthJC (1.0 °C/W per leg); VF = 0.55 V @ 40 A, 125 °C | Limited to lower-power applications due to thermal bottleneck; not rated for 150 °C operation | Acceptable for cost-sensitive 85 °C ambient designs where footprint is secondary |
Compared with VS-80CNQ040ASMPbF, the 80CNQ040A offers superior mechanical stability and higher heatsink interface reliability in vibration-prone environments; versus MBR8040CT, it delivers 19 % lower conduction loss and 65 °C higher max junction temperature-critical for sealed industrial enclosures.
Availability
80CNQ040A is available at Aetrix Electronics and suitable for telecom power supplies, industrial motor drives, server VRMs, and EV onboard chargers requiring stable component supply across multi-year production cycles.
Supply support for 80CNQ040A 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
Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements, with leadership in power semiconductors and precision resistive technologies.
The 80CNQ040A belongs to Vishay's High Power Products Schottky rectifier family, engineered for high-current, low-VF, high-temperature operation in industrial and telecom infrastructure applications.
FAQ
What is the maximum junction temperature rating for the 80CNQ040A?
The 80CNQ040A is rated for continuous operation up to 150 °C junction temperature, validated per Vishay's qualification standards for industrial-level reliability. This allows full 80 A total current capability at elevated ambient temperatures when mounted on an adequately sized heatsink with RthCS ≤ 0.30 °C/W.
Does the 80CNQ040A have a center-tap configuration, and how is it implemented?
Yes, the 80CNQ040A is a center-tap Schottky rectifier module with two anodes (Terminals 1 and 3) and one shared cathode (Terminal 2). This configuration enables use in center-tapped transformer topologies such as forward converters and dual-phase synchronous rectifiers without external interconnection.
What is the forward voltage drop of the 80CNQ040A at rated current and temperature?
The 80CNQ040A exhibits a maximum forward voltage drop of 0.47 V per leg at 40 A and 125 °C junction temperature, measured under rectangular waveform conditions. At 25 °C, VF is 0.52 V at 40 A-confirming its low-conduction-loss design for high-efficiency power conversion.
Is the 80CNQ040A RoHS-compliant, and what does the "PbF" suffix indicate?
Yes, the 80CNQ040A carries the "PbF" suffix indicating lead-free terminations compliant with RoHS Directive 2011/65/EU. The device uses high-purity, high-temperature epoxy encapsulation and meets all material restrictions without exemptions, supporting lead-free soldering processes.
How does the thermal resistance of the 80CNQ040A compare to standard TO-247 Schottky rectifiers?
The 80CNQ040A achieves RthJC = 0.42 °C/W per package-approximately 40 % lower than typical TO-247 Schottky rectifiers (≈0.7 °C/W). This results from its D-61-8 package's direct metal baseplate-to-heatsink interface, enabling higher power density and reduced thermal derating in compact power systems.
80CNQ040A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- D-61-8
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 40A
- Voltage - Forward (Vf) (Max) @ If:
- 520 mV @ 40 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 mA @ 40 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- D-61-8
80CNQ040A FAQ
1.How can I place an order for 80CNQ040A through Aetrix?
Please submit a Request for Quotation (RFQ) for 80CNQ040A 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 80CNQ040A reliable?
The price and inventory of 80CNQ040A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 80CNQ040A is usually 5 days.
3.What payment methods are accepted for 80CNQ040A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 80CNQ040A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 80CNQ040A?
80CNQ040A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 80CNQ040A 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 80CNQ040A?
For technical support, including 80CNQ040A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 80CNQ040A requirements.
6.How does Aetrix verify that 80CNQ040A is sourced from the original manufacturer or authorized distributors?
All 80CNQ040A 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 80CNQ040A meets industry standards.
7.What is the process for return or replacement of 80CNQ040A?
All 80CNQ040A units undergo pre-shipment inspection (PSI). If there is an issue with 80CNQ040A, 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 80CNQ040A part is unused and in its original packaging.
Return procedure for 80CNQ040A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
80CNQ040A Tags
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BAV99-7-F
Diodes Incorporated
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Diodes Incorporated
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MMBD1503-TP
Micro Commercial Co
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