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VS-6CWQ03FN-M3 Vishay
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Manufacturer: Series:6CWQ03
Package:TO-252-3
Category:Diodes & Rectifiers (Diode Arrays)
RoHs Status:Lead free /RoHS Compliant
Datasheet:VS-6CWQ03FN-M3 Datasheet (PDF)
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Overview
The VS-6CWQ03FN-M3 from Vishay is a surface-mount Schottky barrier rectifier belonging to the 6CWQ03 series. This component features a dual-anode common-cathode configuration within a compact TO-252-3 (DPAK) package, making it ideal for space-constrained PCB designs requiring efficient rectification. Its core specifications include a low forward voltage drop (Vf) of 350 mV at a forward current (If) of 7 A and a repetitive reverse voltage (Vrrm) of 30 V. Constructed with silicon (Si) technology, it offers excellent thermal performance with an operating junction temperature range from -40°C to +150°C. These characteristics make it particularly suitable for high-frequency switching, freewheeling, and polarity protection applications in power supplies, DC-DC converters, and motor drive circuits where low power loss and fast switching are critical.
Features
- Low Forward Voltage: A typical Vf of 350 mV at 7 A minimizes conduction losses, improving overall system efficiency and thermal management.
- High Surge Current Capability: Supports a high forward surge current (Ifsm) of 535 A, providing robust protection against inrush current events.
- Dual Anode Common Cathode Configuration: The integrated dual-diode structure in a single package saves board space and simplifies layout in circuits like center-tap rectifiers.
- Surface-Mount Design: The TO-252-3 (DPAK) SMD package is optimized for automated assembly and features a tab for enhanced thermal dissipation to the PCB.
Pin Configuration and Functions
- Pin 1: Anode 1 - Terminal for the first anode of the dual Schottky diode.
- Pin 2: Cathode - Common cathode terminal for both internal diodes.
- Pin 3: Anode 2 - Terminal for the second anode of the dual Schottky diode.
- Tab: Cathode - The package tab is electrically connected to the cathode (Pin 2) and serves as the primary thermal pad for heat sinking.
Typical Applications
- Switch-Mode Power Supplies (SMPS): Used as an output rectifier in low-voltage, high-current DC-DC buck converters.
- Motor Drive and Inverter Circuits: Serves as a freewheeling or clamp diode to protect MOSFETs/IGBTs from inductive kickback.
- Polarity Protection and OR-ing: Prevents damage from reverse polarity connections in battery-powered devices and portable equipment.
Equivalent / Alternative Parts
- VS-6CWQ03FNTR-M3 (Vishay) - Identical part supplied on tape and reel, matching all electrical parameters and package.
- SS8P3-M3/84A (Vishay) - Similar 30V, 8A Schottky rectifier in a TO-252-3 package; verify current rating and thermal specs for direct replacement.
Design-in Tips
- Thermal Management is Crucial: Ensure the PCB copper area under the cathode tab is sufficiently large to act as a heat sink, maintaining junction temperature within limits during high-current operation.
- Mind the Reverse Leakage: The specified reverse current (Ir) is 2 mA. In high-temperature or very low-power applications, consider its impact on standby power consumption.
- Handling Surge Events: While the Ifsm rating is high, for repetitive surge conditions, implement additional inrush current limiting or select a part with a higher safety margin.
Specifications
Type
Value
Type
Value
REACH:
Details
Product:
Schottky Rectifiers
Mounting Style:
SMD/SMT
Configuration:
Dual Anode Common Cathode
Technology:
Si
If - Forward Current:
7 A
Vrrm - Repetitive Reverse Voltage:
30 V
Vf - Forward Voltage:
350 mV
Ifsm - Forward Surge Current:
535 A
Ir - Reverse Current:
2 mA
Minimum Operating Temperature:
- 40 C
Maximum Operating Temperature:
+ 150 C
Factory Pack Quantity:
75
Vr - Reverse Voltage:
30 V
Unit Weight:
0.010582 oz
Series:
Pinout Description
Pin Configuration (TO-252-3 / DPAK / SC-63):
- Pin 1 (Anode of Diode 1)
- Function: Anode terminal for the first Schottky diode in the pair.
-
Electrical Connection: Connect to the positive side of the circuit for Diode 1.
-
Pin 2 (Anode of Diode 2)
- Function: Anode terminal for the second Schottky diode in the pair.
-
Electrical Connection: Connect to the positive side of the circuit for Diode 2.
-
Pin 3 (Common Cathode + Tab)
- Function: Common Cathode for both diodes (shared terminal). The metal tab is electrically connected to this pin.
- Electrical Connection:
- Connect to the ground/negative side of the circuit.
- The tab also serves as a thermal pad to dissipate heat (must be soldered to the PCB for proper heat sinking).
Key Notes:
- Package Type: TO-252-3 (DPak), a surface-mount package with 3 leads (2 anodes + 1 common cathode) and an exposed thermal tab.
- Configuration: Dual Schottky diodes in a common cathode arrangement (both cathodes are internally tied together).
- Tab Connection: The tab is not isolated—it is electrically connected to the common cathode (Pin 3). Ensure proper PCB layout to avoid short circuits.
Typical Applications:
- Power rectification in SMPS (Switched-Mode Power Supplies).
- Reverse polarity protection.
- High-efficiency DC-DC converters.
Possible Alternatives
Part Number
Manufacturer
Package / Case
Quantity
Purchasing Guide
Q: What is the advantage of the dual-anode common-cathode configuration?
Q: Can this diode be used for 12V or 24V system rectification?
Q: How should the thermal pad be connected during PCB layout?
Q: Is this part suitable for high-frequency switching above 100 kHz?
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