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Vishay General Semiconductor - Diodes Division VS-47CTQ020S-M3
- Part No.:
- VS-47CTQ020S-M3
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
VS-47CTQ020S-M3.pdf
- Description:
- DIODE ARR SCHOTT 20V 20A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,147
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Product details
Overview
VS-47CTQ020S-M3 from Vishay Semiconductors is a high-performance, dual-leg Schottky rectifier module in D2PAK (TO-263AB) package, configured as a center-tapped common-cathode device rated for 20 A per leg (40 A total), 20 V reverse voltage, and ultralow 0.34 V forward voltage at 20 A and 125 °C - optimized for 3.3 V output DC/DC converters in telecom and server power supplies.
For engineers reviewing the VS-47CTQ020S-M3 datasheet, VS-47CTQ020S-M3 pinout, VS-47CTQ020S-M3 application, or VS-47CTQ020S-M3 equivalent, key selection criteria include its 150 °C junction rating, 1.5 °C/W thermal resistance per leg, 3000 pF junction capacitance, 5.5 nH series inductance, and JEDEC JESD47-qualified ruggedness for high-reliability industrial and computing power systems.
Technical Context
This device integrates two matched Schottky die in a single D2PAK thermally enhanced package with a shared cathode terminal, enabling synchronous rectification in center-tapped topologies. Its proprietary barrier technology delivers stable VF down to 0.31 V at 150 °C and supports high-frequency switching up to MHz-range operation without significant switching loss penalty.
The module features guard ring protection, MSL Level 1 moisture sensitivity, halogen-free RoHS-compliant termination, and is qualified for repetitive avalanche energy of 18 mJ per leg - critical for unclamped inductive load handling in redundant power subsystems and reverse battery protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) per leg | 20 A continuous at TC = 135 °C (rectangular waveform); enables compact 3.3 V/40 A output stages without forced air cooling |
| VRRM / VR | 20 V DC reverse voltage at 125 °C; suitable for low-voltage synchronous rectification where margin above 3.3 V rail is minimal |
| VF at 20 A, 125 °C | 0.34 V typical; reduces conduction loss by >35% vs. standard Schottkys, directly improving efficiency in high-current POL converters |
| RthJC per leg | 1.5 °C/W; allows direct heatsink mounting with <1.0 °C temperature rise per watt dissipated, supporting high-power density designs |
| EAS per leg | 18 mJ at TJ = 25 °C, IAS = 3 A, L = 3 mH; provides robustness against transient inductive kickback in hot-swap and OR-ing applications |
| IRM at 125 °C | 310 mA at VR = rated 20 V; ensures low leakage under elevated temperature stress in sealed or high-ambient environments |
| CT per leg | 3000 pF at VR = 5 V, 25 °C; limits capacitive turn-on loss and EMI generation during fast switching transitions |
| LS per leg | 5.5 nH measured 5 mm from package body; minimizes parasitic ringing and improves stability in high-dI/dt synchronous rectifier layouts |
Pinout & Package
D2PAK (TO-263AB) surface-mount package with exposed thermal pad on underside; 3-terminal configuration: Pin 1 = Anode Leg 1, Pin 2 = Common Cathode, Pin 3 = Anode Leg 2. Mounting torque: 6–12 kgf·cm (5–10 lbf·in). Weight: 2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (Leg 1) | Input terminal for first Schottky die; connects to primary-side winding tap or input rail in center-tapped forward converter |
| Pin 2 | Common Cathode | Shared output node for both legs; serves as low-impedance return path to 3.3 V output rail and must be routed with minimum inductance |
| Pin 3 | Anode (Leg 2) | Input terminal for second Schottky die; connects to opposite winding tap or complementary input phase in interleaved designs |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow VF at high temperature | 0.31 V at 20 A and 150 °C - maintains efficiency in thermally constrained server VRMs without derating |
| Center-tap common-cathode topology | Single-package dual-diode integration eliminates layout mismatch and timing skew between parallel rectifiers |
| Guard ring ruggedness | JEDEC JESD47-qualified reliability with 1000 A non-repetitive surge rating - withstands repeated hot-plug and fault transients |
| High-purity epoxy encapsulation | MSL Level 1, LF peak 245 °C - supports lead-free reflow without delamination or popcorn effect in high-volume SMT lines |
| Optimized for 3.3 V systems | VR = 20 V with 10 V rating at 150 °C - provides sufficient margin over 3.3 V rail while minimizing die area and capacitance |
Applications
| Telecom DC/DC Converters | Server Point-of-Load (POL) Modules |
|---|---|
|
Use Scenario: Primary-side synchronous rectification in isolated 3.3 V/40 A center-tapped forward converters for 48 V telecom power shelves. IC Role / Device Role / Timing Role: Dual-leg Schottky rectifier replacing MOSFETs in secondary-side synchronous rectification; operates at 200–500 kHz switching frequency. Use Value: Reduces conduction loss by 1.2 W per leg vs. conventional Schottkys, lowering thermal design burden and enabling fanless operation. |
Use Scenario: Output rectification in multiphase buck-derived POL modules supplying ASICs and FPGAs in AI accelerators. IC Role / Device Role / Timing Role: Center-tapped common-cathode rectifier providing low-VF, low-inductance current summation at the 3.3 V output node. Use Value: 5.5 nH series inductance and 3000 pF capacitance minimize switching node ringing and EMI filter size in dense PCB layouts. |
| Redundant Power Subsystems | Reverse Battery Protection |
|
Use Scenario: OR-ing diode in N+1 redundant 3.3 V backplane power distribution with automatic failover. IC Role / Device Role / Timing Role: High-current, low-VF blocking diode preventing backfeed between parallel power supplies during fault conditions. Use Value: 18 mJ avalanche energy rating enables safe clamping of inductive turn-off transients without external snubbers. |
Use Scenario: Input protection in automotive infotainment head units powered from 12 V battery with risk of reverse polarity connection. IC Role / Device Role / Timing Role: Low-loss series-blocking rectifier placed between battery input and DC/DC controller input stage. Use Value: 0.34 V forward drop at 20 A reduces voltage headroom loss by 6.8 V vs. silicon diodes, preserving startup margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VSKT42/02 | Same 20 V/20 A per leg rating but TO-220AC package; higher RthJC (2.5 °C/W); no guard ring; VF = 0.42 V @ 20 A/125 °C | Limited to lower-power, through-hole designs with heatsink access; not suitable for high-density SMT or 150 °C ambient operation | Select VS-47CTQ020S-M3 when board space, thermal performance, or high-temperature reliability are critical. |
| SS3P4L | Single-diode SMC package; 40 A total IF(AV) but only one anode; VF = 0.45 V @ 20 A/25 °C; no avalanche rating; RthJC = 2.0 °C/W | Requires two discrete devices and matching layout for center-tap function; lacks integrated common cathode and thermal symmetry | Choose VS-47CTQ020S-M3 for simplified layout, matched die performance, and guaranteed thermal coupling in dual-leg operation. |
Compared with VSKT42/02 and SS3P4L, VS-47CTQ020S-M3 delivers superior thermal management (1.5 °C/W vs. ≥2.0 °C/W), lower conduction loss (0.34 V vs. ≥0.42 V), integrated center-tap symmetry, and JEDEC-qualified ruggedness - making it the preferred choice for high-efficiency, high-reliability 3.3 V power delivery in space-constrained computing and telecom platforms.
Availability
VS-47CTQ020S-M3 is available at Aetrix Electronics and suitable for telecom DC/DC converters, server point-of-load modules, redundant power subsystems, and reverse battery protection circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for VS-47CTQ020S-M3 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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for power, signal, and sensing applications.
The VS-47CTQ020S-M3 belongs to Vishay's "Q" series of ultra-low VF Schottky rectifiers, engineered specifically for high-efficiency, high-current 3.3 V and 5 V power conversion in datacenter, telecom, and industrial infrastructure.
FAQ
What is the maximum junction temperature rating for VS-47CTQ020S-M3?
The VS-47CTQ020S-M3 is rated for continuous operation up to +150 °C junction temperature, validated per JEDEC JESD47 qualification. This enables use in thermally demanding environments such as sealed server chassis or high-ambient industrial enclosures without derating, provided thermal design meets the 1.5 °C/W RthJC specification per leg.
Does VS-47CTQ020S-M3 support center-tapped transformer configurations?
Yes, VS-47CTQ020S-M3 is explicitly designed as a center-tapped Schottky rectifier module with a common cathode configuration (Pin 2) and two independent anodes (Pins 1 and 3). It is optimized for use in center-tapped forward and push-pull converters delivering 3.3 V outputs, eliminating the need for discrete dual-diode placement and ensuring matched thermal and electrical characteristics.
What is the forward voltage drop of VS-47CTQ020S-M3 at full load and elevated temperature?
At 20 A per leg and junction temperature of 125 °C, the VS-47CTQ020S-M3 exhibits a typical forward voltage drop of 0.34 V. At 150 °C, this further decreases to 0.31 V - a result of the device's proprietary barrier technology that maintains low VF across its full operating temperature range.
Is VS-47CTQ020S-M3 compatible with lead-free reflow soldering processes?
Yes, VS-47CTQ020S-M3 is qualified for lead-free reflow with a maximum peak temperature of 245 °C and meets MSL Level 1 per J-STD-020. Its high-purity, high-temperature epoxy encapsulation prevents delamination and moisture-related failures during standard Pb-free SMT assembly, including double-sided reflow.
What packaging options are available for VS-47CTQ020S-M3?
VS-47CTQ020S-M3 is supplied in antistatic plastic tubes (50 units per tube) and 13-inch plastic tape-and-reel formats (800 units per reel, designated VS-47CTQ020STRL-M3 and VS-47CTQ020STRR-M3). The "-M3" suffix confirms halogen-free, RoHS-compliant, and lead (Pb)-free termination per Vishay's environmental standards.
VS-47CTQ020S-M3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 450 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 3 mA @ 20 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
VS-47CTQ020S-M3 FAQ
1.How can I place an order for VS-47CTQ020S-M3 through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-47CTQ020S-M3 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 VS-47CTQ020S-M3 reliable?
The price and inventory of VS-47CTQ020S-M3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-47CTQ020S-M3 is usually 5 days.
3.What payment methods are accepted for VS-47CTQ020S-M3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-47CTQ020S-M3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-47CTQ020S-M3?
VS-47CTQ020S-M3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-47CTQ020S-M3 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 VS-47CTQ020S-M3?
For technical support, including VS-47CTQ020S-M3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-47CTQ020S-M3 requirements.
6.How does Aetrix verify that VS-47CTQ020S-M3 is sourced from the original manufacturer or authorized distributors?
All VS-47CTQ020S-M3 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 VS-47CTQ020S-M3 meets industry standards.
7.What is the process for return or replacement of VS-47CTQ020S-M3?
All VS-47CTQ020S-M3 units undergo pre-shipment inspection (PSI). If there is an issue with VS-47CTQ020S-M3, 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 VS-47CTQ020S-M3 part is unused and in its original packaging.
Return procedure for VS-47CTQ020S-M3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VS-47CTQ020S-M3 Tags
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BAT54C-7-F
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
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BAV70LT1G
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BAT54CLT1G
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
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BAT54S,215
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MMBD1503-TP
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