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Vishay General Semiconductor - Diodes Division 6CWQ03FN
- Part No.:
- 6CWQ03FN
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
6CWQ03FN.pdf
- Description:
- DIODE ARRAY SCHOTT 30V 3.5A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:5,179
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Product details
Overview
6CWQ03FN from Vishay (formerly International Rectifier) is a surface-mount, center-tap Schottky rectifier optimized for low forward voltage drop and high-frequency switching in compact power systems. It delivers 7 A average forward current per device (3.5 A per leg), 30 V reverse voltage rating, and 0.35 V forward voltage at 3 A/125°C - enabling efficient operation in DC-DC converters and battery protection circuits.
For engineers reviewing the 6CWQ03FN datasheet, 6CWQ03FN pinout, 6CWQ03FN application, or 6CWQ03FN equivalent, key selection criteria include its D-PAK (TO-252AA) thermal performance (RthJC = 4.70 °C/W per leg), center-tap dual-anode configuration, and ruggedized guard-ring construction for long-term reliability under repetitive surge conditions.
Technical Context
The 6CWQ03FN integrates two Schottky diodes sharing a common cathode terminal, forming a center-tapped structure ideal for full-wave rectification without a transformer center tap. Its low 32.86 mΩ forward slope resistance and 290 pF junction capacitance per leg support stable high-frequency operation up to MHz-range switching.
Designed with a guard ring and qualified to AEC-Q101, the device sustains 535 A non-repetitive surge current (5 μs sine) and operates across –40°C to +150°C junction temperature. Thermal resistance and dv/dt rating (10,000 V/μs) confirm suitability for fast-switching, thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) per device | 7 A - total average forward current handling capacity under 50% duty cycle, rectangular waveform at TC = 134°C |
| VRRM | 30 V - maximum DC reverse blocking voltage per leg; defines safe operating range in battery reverse protection |
| VF @ 3 A, TJ = 125°C | 0.35 V - low conduction loss per leg enables >95% efficiency in 5–12 V output converters |
| RthJC per leg | 4.70 °C/W - thermal resistance from junction to case supports direct heatsinking via exposed D-PAK drain tab |
| dv/dt rating | 10,000 V/μs - high voltage transient immunity prevents false turn-on in noisy switch-mode environments |
| IRM @ 125°C | 50 mA - reverse leakage per leg at max junction temperature; impacts standby power in always-on systems |
| CT @ 5 V | 290 pF - junction capacitance per leg limits high-frequency switching losses and EMI generation |
Pinout & Package
Package: D-PAK (TO-252AA), surface-mount, thermally enhanced with exposed drain pad. Dimensions conform to JEDEC outline TO-252AA; weight ≈ 0.3 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode of first Schottky diode | Connects to input source side for one half-cycle conduction path |
| 2 (Anode) | Anode of second Schottky diode | Connects to input source side for complementary half-cycle conduction path |
| 3 (Cathode) | Common cathode node | Output node for full-wave rectified DC; electrically tied to exposed metal tab |
| 4 (Base / Tab) | Thermal and electrical connection to cathode | Must be soldered to large copper pour for thermal management and low-inductance return path |
Key Features
| Feature | Design Value |
|---|---|
| Center-tap dual-anode configuration | Enables full-wave rectification with single-output transformer or split-rail input without external diode pairing |
| Guard ring construction | Prevents edge breakdown under high dv/dt and thermal stress, extending lifetime in automotive and industrial converters |
| Low VF slope resistance (32.86 mΩ) | Minimizes I²R conduction loss at high load currents, reducing thermal derating requirements |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge testing per JEDEC standards |
| D-PAK thermal interface | Exposed cathode tab provides <2.4 °C/W effective thermal path when mounted on ≥1 in² 2-oz copper |
Applications
| Switching Power Supplies | Battery Charging Circuits |
|---|---|
|
Use Scenario: Secondary-side synchronous rectification in 12 V/500 W AC-DC adapters and telecom PSUs. IC Role / Device Role / Timing Role: Center-tap Schottky rectifier replacing dual discrete diodes to reduce component count and layout area. Use Value: 0.35 V VF at 3 A lowers conduction loss by ~30% vs. standard 40 V Schottkys, improving efficiency at light-to-moderate loads. |
Use Scenario: Input polarity protection and charge path isolation in 2-cell Li-ion portable devices. IC Role / Device Role / Timing Role: Dual-anode configuration allows shared cathode output for redundant reverse-battery blocking. Use Value: 50 mA IRM at 125°C ensures minimal standby current leakage during storage or transport conditions. |
| Disk Drive Power Rails | Free-Wheeling Diodes in Motor Drives |
|
Use Scenario: +5 V and +12 V rail rectification in HDD spindle and actuator driver modules. IC Role / Device Role / Timing Role: High-frequency Schottky rectifier handling pulsed currents up to 535 A surge during spin-up. Use Value: 10,000 V/μs dv/dt rating prevents spurious conduction during rapid MOSFET switching transients. |
Use Scenario: Inductive kickback clamping in 24 V BLDC motor gate drivers and H-bridge outputs. IC Role / Device Role / Timing Role: Low-inductance (5.0 nH) package minimizes voltage overshoot during di/dt events. Use Value: 290 pF junction capacitance per leg reduces capacitive coupling noise into sensitive gate control signals. |
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-6CWQ03FN | Same die, identical electrical specs; rebranded post-acquisition with updated Vishay marking and packaging | No functional difference; compatible in all legacy IR-design PCBs | Select for new designs requiring Vishay's current quality documentation and supply chain traceability |
| ON Semiconductor MBR730CT | 30 V, 7 A center-tap Schottky in TO-220AC; higher RthJC (3.0 °C/W) but no surface-mount constraint | Suitable where through-hole mounting and heatsink attachment are preferred over D-PAK footprint | Choose when thermal design uses bolt-down heatsinks or board space permits larger outline |
Compared with the 6CWQ03FN, the VS-6CWQ03FN offers identical performance in a fully aligned supply chain, while the MBR730CT trades surface-mount convenience for superior thermal dissipation in mechanically robust enclosures - guiding selection based on assembly method and thermal budget.
Availability
6CWQ03FN is available at Aetrix Electronics and suitable for switching power supplies, battery charging circuits, and motor drive free-wheeling diodes requiring stable component supply and automotive-grade reliability validation.
Supply support for 6CWQ03FN 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 acquired International Rectifier's Power Control Systems business in 2007 and maintains legacy product lines including high-reliability power semiconductors.
The 6CWQ03FN belongs to Vishay's "Q-Series" Schottky rectifier family, engineered specifically for high-efficiency, high-density DC-DC conversion in automotive, computing, and industrial power systems.
FAQ
What is the maximum junction temperature rating for the 6CWQ03FN?
The 6CWQ03FN has a maximum junction temperature rating of +150°C, verified per AEC-Q101 qualification. This allows continuous operation in under-hood automotive environments and sealed industrial enclosures. Derating curves in Figure 5 of Bulletin PD-20560 show allowable case temperature decreases linearly above 100°C ambient, and the device must be thermally managed using its exposed cathode tab to sustain this rating. The 6CWQ03FN's RthJC of 4.70 °C/W per leg defines the required heatsinking for any given power dissipation.
Does the 6CWQ03FN support full-wave rectification without an external center-tapped transformer?
Yes - the 6CWQ03FN's internal center-tap configuration (dual anodes, common cathode) enables full-wave rectification using a standard dual-secondary or split-rail AC source, eliminating need for a physical center tap. This simplifies transformer design and reduces cost in offline SMPS and isolated DC-DC converters. The 6CWQ03FN's symmetrical VF matching between legs (<5% mismatch at rated current) ensures balanced conduction and minimal output ripple.
What is the surge current capability of the 6CWQ03FN and how is it tested?
The 6CWQ03FN supports 535 A peak non-repetitive surge current per leg under 5 μs sine-wave or 3 μs rectangular pulse conditions, as defined in Figure 7 of its datasheet. This rating applies after any rated load condition with full VRRM applied, and reflects capability to absorb inductive energy spikes during motor startup or capacitor charging. The 6CWQ03FN's guard ring and rugged silicon design ensure this surge withstand is repeatable without parameter shift or degradation.
How does the 6CWQ03FN's forward voltage compare at different temperatures and currents?
The 6CWQ03FN's forward voltage is specified at 0.35 V per leg at 3 A and TJ = 125°C, rising to 0.46 V at 6 A under same conditions. At room temperature (25°C), VF drops to 0.22 V threshold and 0.45 V at 3 A. These values are confirmed in Figure 1 of Bulletin PD-20560 and reflect Schottky behavior: lower VF at low T but positive tempco above ~80°C. Designers must use the 125°C data for worst-case thermal analysis of the 6CWQ03FN.
Is the 6CWQ03FN lead-free and RoHS compliant?
Yes - the 6CWQ03FN is manufactured with lead-free terminations and complies with RoHS Directive 2011/65/EU. The "FN" suffix in the part number explicitly denotes TO-252AA packaging with Pb-free finish, and Vishay confirms compliance in its material declarations. No exemptions apply; the 6CWQ03FN contains <1000 ppm lead by weight and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) for unlimited floor life at ≤30°C/60% RH.
6CWQ03FN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tube
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io) (per Diode):
- 3.5A
- Voltage - Forward (Vf) (Max) @ If:
- 450 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 2 mA @ 30 V
- Operating Temperature - Junction:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252AA (DPAK)
6CWQ03FN FAQ
1.How can I place an order for 6CWQ03FN through Aetrix?
Please submit a Request for Quotation (RFQ) for 6CWQ03FN 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 6CWQ03FN reliable?
The price and inventory of 6CWQ03FN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 6CWQ03FN is usually 5 days.
3.What payment methods are accepted for 6CWQ03FN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6CWQ03FN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6CWQ03FN?
6CWQ03FN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6CWQ03FN 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 6CWQ03FN?
For technical support, including 6CWQ03FN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6CWQ03FN requirements.
6.How does Aetrix verify that 6CWQ03FN is sourced from the original manufacturer or authorized distributors?
All 6CWQ03FN 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 6CWQ03FN meets industry standards.
7.What is the process for return or replacement of 6CWQ03FN?
All 6CWQ03FN units undergo pre-shipment inspection (PSI). If there is an issue with 6CWQ03FN, 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 6CWQ03FN part is unused and in its original packaging.
Return procedure for 6CWQ03FN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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