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Vishay General Semiconductor - Diodes Division 440CNQ030
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- Part No.:
- 440CNQ030
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-244AB
- Datasheet:
-
440CNQ030.pdf
- Description:
- DIODE MOD SCHOT 30V 440A TO244AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,110
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Product details
Overview
440CNQ030 from Infineon Technologies is a center-tap, high-current Schottky rectifier module rated for 440 A average forward current, 30 V reverse voltage, and 150 °C maximum junction temperature; it features 0.41 V forward voltage drop per leg at 220 A and 125 °C, and is used in high-power switching power supplies and welding equipment.
For engineers reviewing the 440CNQ030 datasheet, 440CNQ030 pinout, 440CNQ030 application, or 440CNQ030 equivalent, key selection factors include its TO-244AB package thermal resistance (0.10 °C/W junction-to-case for full package), 27 kA non-repetitive surge rating, center-tap configuration for dual-leg operation, and low VF optimization for high-efficiency DC-DC conversion.
Technical Context
This device is a dual-anode, common-cathode Schottky rectifier with center-tapped cathode terminal, enabling symmetrical current sharing across two parallel legs. Its barrier technology supports stable operation up to 150 °C TJ while maintaining moderate leakage (1120 mA per leg at 125 °C).
Designed for high-frequency, high-current applications, it delivers low conduction loss (0.41 V @ 220 A, 125 °C) and fast recovery (dv/dt capability of 10,000 V/µs), with junction capacitance of 14,800 pF per leg at 5 V and series inductance of 5.0 nH per leg.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 440 A average forward current - enables high-power output in industrial SMPS without forced air cooling |
| VRRM | 30 V reverse voltage - suitable for low-voltage, high-current bus architectures (e.g., 24 V input welders) |
| VF @ 220A, 125°C | 0.41 V per leg - reduces conduction loss by ~30% vs. comparable Si diodes at same current/temp |
| IFSM (per leg) | 27,000 A peak surge - withstands short-circuit transients in arc-welding inverters |
| RthJC (package) | 0.10 °C/W - allows >400 W dissipation with 15 °C case-to-heatsink ΔT under DC operation |
| TJ Range | –55 to +150 °C - supports operation in sealed industrial enclosures without derating at ambient up to 85 °C |
| CT (per leg) | 14,800 pF @ 5 V - limits high-frequency switching speed but remains usable up to ~100 kHz |
Pinout & Package
Package: TO-244AB (Modified JEDEC), metal-base insulated module with center-tap common cathode configuration, 90.17 mm × 39.75 mm footprint, 79 g weight, and 1/4-20 slotted hex mounting hole.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ANODE 1 | First Schottky anode | Connects to first half of transformer secondary or parallel input rail; carries up to 220 A DC per leg |
| ANODE 2 | Second Schottky anode | Connects to second half of center-tapped winding; electrically isolated from ANODE 1 |
| COMMON CATHODE | Shared cathode node | Center-tap output node - serves as DC output reference point for dual-leg synchronous rectification |
| BASE | Electrically isolated metal baseplate | Thermally conductive mounting surface; requires insulating pad or ceramic washer when heatsink is grounded |
Key Features
| Feature | Design Value |
|---|---|
| Center-tap module architecture | Enables balanced dual-leg rectification without external current-sharing resistors or separate diodes |
| High-purity, high-temp epoxy encapsulation | Prevents moisture ingress and mechanical cracking during thermal cycling in welding duty cycles |
| Guard ring structure | Improves ruggedness against voltage transients and edge breakdown during repetitive avalanche stress |
| Low VF optimization | Reduces forward conduction loss by ≥25% vs. standard Schottky modules at 220 A/125 °C |
| 150 °C TJ rating | Eliminates need for active cooling in space-constrained industrial converters operating at 85 °C ambient |
Applications
| Switch-Mode Power Supplies | Industrial Welding Inverters |
|---|---|
Use Scenario: High-efficiency 24 V/50 kW secondary-side rectification in telecom rectifiers and server PSUs. IC Role / Device Role / Timing Role: Dual-leg Schottky rectifier providing low-loss DC output with center-tap symmetry for transformer secondary return path. Use Value: 0.41 V VF at 220 A cuts conduction loss by 18 W per leg vs. legacy 0.52 V parts, improving system efficiency by 0.8% at full load. | Use Scenario: Output rectification in IGBT-based 3-phase inverter welders with 100% duty cycle requirements. IC Role / Device Role / Timing Role: High-surge-capable freewheeling and output rectifier handling 27 kA transient currents during arc initiation. Use Value: 27,000 A IFSM rating ensures survival of repeated short-circuit events without bond wire fusing or thermal runaway. |
| Reverse Battery Protection | DC Motor Drive Freewheeling |
Use Scenario: 24 V vehicle-mounted battery backup systems requiring fail-safe polarity reversal blocking. IC Role / Device Role / Timing Role: Low-VF, high-current Schottky clamp preventing reverse current flow during battery swap or jump-start conditions. Use Value: 30 V VRRM and 1120 mA IRM at 125 °C ensure reliable blocking even under hot under-hood conditions with minimal standby loss. | Use Scenario: Bidirectional freewheeling path in 400 A H-bridge motor drives for cranes and hoists. IC Role / Device Role / Timing Role: Dual-leg center-tapped rectifier providing low-loss recirculation path during PWM off-time. Use Value: 0.10 °C/W RthJC (package) enables continuous 400 A freewheeling without heatsink oversizing or thermal throttling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VSKT440/03 | Same 440 A IF(AV), 30 V VRRM, but TO-264 package; RthJC = 0.15 °C/W (per leg), VF = 0.44 V @ 220 A | Larger footprint (100 mm × 45 mm); no center-tap - requires external parallel diodes for dual-leg use | Select when board layout permits larger outline and discrete cathode routing is acceptable |
| IXYS DSSK440-03A | 440 A IF(AV), 30 V VRRM, TO-247-3L; VF = 0.43 V @ 220 A; RthJC = 0.22 °C/W (per leg) | Single-anode, single-cathode configuration; no center-tap - unsuitable for transformer center-tap rectification | Select only for single-leg freewheeling or when using external center-tap wiring |
Compared with VSKT440/03 and DSSK440-03A, the 440CNQ030 uniquely integrates dual-anode symmetry and common-cathode center tap in one TO-244AB module, eliminating interconnect inductance and thermal mismatch between legs - critical for high-current, high-reliability welding and SMPS designs.
Availability
440CNQ030 is available at Aetrix Electronics and suitable for industrial welding inverters, high-current switch-mode power supplies, and reverse battery protection circuits requiring stable component supply and long-term lifecycle support.
Supply support for 440CNQ030 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, automotive ICs, and industrial control solutions, with global manufacturing and quality certification to IATF 16949 and ISO 9001.
The 440CNQ030 belongs to Infineon's high-current Schottky rectifier product line, engineered specifically for industrial-grade power conversion where low VF, high surge tolerance, and 150 °C operation are mandatory.
FAQ
What is the maximum allowable case temperature for continuous operation of the 440CNQ030?
The 440CNQ030 supports continuous operation with case temperature up to 145 °C at 220 A average forward current per leg, as shown in Fig. 5 of the datasheet. At full 440 A rating, the maximum allowable case temperature drops to 115 °C to maintain safe junction temperature within the –55 to +150 °C range. Thermal design must account for RthJC = 0.10 °C/W (package) and RthCS = 0.10 °C/W (case-to-heatsink).
Does the 440CNQ030 have a center-tap on the anode or cathode side?
The 440CNQ030 has a center-tapped common cathode configuration - both anodes (ANODE 1 and ANODE 2) are electrically isolated, while the COMMON CATHODE terminal serves as the shared output node. This architecture is optimized for center-tapped transformer secondary rectification and dual-leg freewheeling paths, not for anode-tapped topologies.
Can the 440CNQ030 be used in place of a standard dual-diode package like MBR4045CT?
No - the 440CNQ030 is not a drop-in replacement for small-outline dual-diode packages. It is a 79 g, TO-244AB module rated for 440 A total current, whereas MBR4045CT is a 3 A, TO-220 device. The 440CNQ030 requires industrial-grade mounting hardware, heatsinking, and PCB layout for high-current terminals; electrical compatibility does not imply mechanical or thermal interchangeability.
What is the surge current rating of the 440CNQ030 and how is it defined?
The 440CNQ030 is rated for 27,000 A peak non-repetitive surge current per leg under 5 µs sine-wave or 3 µs rectangular pulse conditions, as specified in the Absolute Maximum Ratings table. This rating assumes the device is at rated VRRM prior to surge and is validated per Fig. 7. It is intended for short-circuit and arc-initiation event handling in welding inverters, not for repetitive switching.
Is the baseplate of the 440CNQ030 electrically isolated from the terminals?
Yes - the metal baseplate (BASE terminal) is electrically isolated from all internal semiconductor die and terminals (ANODE 1, ANODE 2, COMMON CATHODE). It serves solely as a thermal interface and must be mounted to a heatsink using an insulating thermal pad or ceramic washer if the heatsink is grounded, to prevent shorting the cathode node to chassis ground.
440CNQ030 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):
- 30 V
- Current - Average Rectified (Io) (per Diode):
- 440A
- Voltage - Forward (Vf) (Max) @ If:
- 600 mV @ 440 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 20 mA @ 30 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- TO-244AB
440CNQ030 FAQ
1.How can I place an order for 440CNQ030 through Aetrix?
Please submit a Request for Quotation (RFQ) for 440CNQ030 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 440CNQ030 reliable?
The price and inventory of 440CNQ030 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 440CNQ030 is usually 5 days.
3.What payment methods are accepted for 440CNQ030?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 440CNQ030 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 440CNQ030?
440CNQ030 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 440CNQ030 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 440CNQ030?
For technical support, including 440CNQ030 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 440CNQ030 requirements.
6.How does Aetrix verify that 440CNQ030 is sourced from the original manufacturer or authorized distributors?
All 440CNQ030 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 440CNQ030 meets industry standards.
7.What is the process for return or replacement of 440CNQ030?
All 440CNQ030 units undergo pre-shipment inspection (PSI). If there is an issue with 440CNQ030, 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 440CNQ030 part is unused and in its original packaging.
Return procedure for 440CNQ030:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
440CNQ030 Tags
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