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Vishay General Semiconductor - Diodes Division VS-40CTQ045SPBF
- Part No.:
- VS-40CTQ045SPBF
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
VS-40CTQ045SPBF.pdf
- Description:
- DIODE ARR SCHOTT 45V 20A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,879
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Product details
Overview
VS-40CTQ045SPBF from Vishay Semiconductors is a high-performance dual common-cathode Schottky rectifier in TO-263AB (D2PAK) package, rated for 45 V reverse voltage and 2 × 20 A average forward current per leg, with 0.48 V forward voltage at 20 A and 125 °C junction temperature. It delivers low conduction loss in high-frequency DC/DC converters and automotive power modules requiring robust reverse-battery protection.
For engineers reviewing the VS-40CTQ045SPBF datasheet, VS-40CTQ045SPBF pinout, VS-40CTQ045SPBF application, or VS-40CTQ045SPBF equivalent, key selection criteria include its 150 °C maximum junction temperature, center-tap common-cathode configuration, 2.0 °C/W thermal resistance per leg, AEC-Q101 qualification, and suitability for high-efficiency freewheeling and synchronous rectification circuits.
Technical Context
This device integrates two independent Schottky die sharing a common cathode terminal, enabling dual-leg operation without inter-die coupling. Its proprietary barrier technology ensures stable 0.48 V VF at 20 A/125 °C while maintaining <115 mA reverse leakage under rated conditions.
The TO-263AB package provides low 2.0 °C/W RthJC per leg and supports surface-mount reflow up to 260 °C peak (MSL Level 1). The structure enables unclamped inductive switching with 20 mJ avalanche energy rating per leg and 10,000 V/μs dV/dt capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR | 45 V - Maximum DC reverse blocking voltage; defines safe operating range in battery-input or boost-stage applications |
| IF(AV) per leg | 20 A - Continuous average forward current per anode leg at TC = 116 °C; determines heatsink sizing in 50 % duty-cycle operation |
| VF @ 20 A, 125 °C | 0.48 V - Confirmed forward drop under worst-case thermal condition; directly sets conduction loss in high-temp environments |
| RthJC per leg | 2.0 °C/W - Junction-to-case thermal resistance; enables precise thermal modeling when mounted on copper heatsink |
| TJ max | 150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial ambient up to 105 °C |
| EAS per leg | 20 mJ - Non-repetitive avalanche energy rating; allows safe handling of inductive turn-off transients in motor drive freewheel paths |
| dV/dt | 10,000 V/μs - Voltage rate-of-change immunity; prevents false turn-on during fast-switching gate-drive noise coupling |
Pinout & Package
VS-40CTQ045SPBF uses the TO-263AB (D2PAK) surface-mount package with exposed thermal pad. Pin assignments are validated per Vishay document 95014: Pin 1 = Anode 1, Pin 2 = Common Cathode, Pin 3 = Anode 2. The package supports 2.0 °C/W RthJC per leg and MSL Level 1 reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | Input terminal for first Schottky die; connects to primary-side switch node in half-bridge freewheeling path |
| Pin 2 | Common Cathode | Shared output node for both diodes; ties directly to system ground or low-side return path in dual-output converters |
| Pin 3 | Anode 2 | Input terminal for second Schottky die; used for independent input routing or phase-splitting in interleaved topologies |
Key Features
| Feature | Design Value |
|---|---|
| Center-tap common-cathode configuration | Enables dual-leg integration in single footprint; eliminates need for discrete cathode tie and reduces PCB trace inductance |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics; includes temperature cycling, HTRB, and ESD testing per stress requirements |
| Guard ring structure | Improves edge termination ruggedness; extends lifetime under repetitive surge and partial discharge stress in harsh environments |
| High-purity epoxy encapsulation | Provides >1000 h moisture resistance per JESD22-A112; maintains parameter stability in humid under-hood or industrial wash-down zones |
| 150 °C TJ operation | Supports compact thermal design in space-constrained modules; avoids derating penalties in ambient temperatures up to 105 °C |
Applications
| Automotive DC/DC Converters | Industrial Motor Drive Freewheeling |
|---|---|
|
Use Scenario: 12 V–48 V bidirectional DC/DC converter in 48 V mild-hybrid vehicles, operating at 200 kHz switching frequency with 40 A total output. IC Role / Device Role / Timing Role: Dual-leg Schottky rectifier providing synchronous rectification for both buck and boost phases, with shared cathode reducing layout complexity. Use Value: 0.48 V VF at 125 °C cuts conduction loss by ~35 % vs. standard silicon diodes, improving efficiency from 92 % to 94.5 % at full load. |
Use Scenario: Three-phase inverter auxiliary power supply using center-tap transformer with 20 A per leg output. IC Role / Device Role / Timing Role: Center-tap Schottky rectifier replacing discrete dual-diode solution; common cathode simplifies grounding and minimizes loop area. Use Value: 2.0 °C/W RthJC per leg enables direct thermal pad mounting to aluminum heatsink, eliminating thermal interface material in cost-sensitive drives. |
| Server PSU Secondary-Side Rectification | Reverse Battery Protection Circuit |
|
Use Scenario: 48 V input, 12 V/40 A output LLC resonant converter in datacenter power supply, requiring low-loss secondary-side rectification. IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier operating in parallel mode with interleaved control; each leg handles 20 A average current. Use Value: 2800 pF junction capacitance per leg minimizes switching loss during zero-voltage switching transitions, preserving ZVS behavior up to 300 kHz. |
Use Scenario: 24 V industrial control system with hot-swap capability and reverse polarity input protection. IC Role / Device Role / Timing Role: Common-cathode Schottky placed between input connector and main rail; anodes connected to input terminals, cathode to protected system rail. Use Value: 45 V VR rating provides 2× margin over 24 V nominal; 115 mA IRM at 125 °C ensures minimal standby leakage during extended storage at elevated ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS40H45CG | TO-247AC package, 40 A total IF(AV), same 45 V VR but higher VF (0.57 V @ 20 A/125 °C) | Requires through-hole mounting and larger heatsink due to higher RthJC (2.5 °C/W) | Preferred where legacy through-hole assembly exists and thermal margin exceeds 5 °C |
| ON Semiconductor NTS40CTQ045WG | D2PAK-3L package, identical pinout and 0.48 V VF, but not AEC-Q101 qualified and lower EAS (15 mJ) | Lacks automotive qualification; suitable only for commercial/industrial systems without reliability certification needs | Cost-optimized alternative when AEC-Q101 is not mandated and transient energy remains below 15 mJ |
Compared with STPS40H45CG and NTS40CTQ045WG, the VS-40CTQ045SPBF uniquely combines AEC-Q101 qualification, 20 mJ avalanche rating, and D2PAK surface-mount compatibility-making it the only option qualified for automotive-grade freewheeling in space-constrained, thermally aggressive environments.
Availability
VS-40CTQ045SPBF is available at Aetrix Electronics and suitable for automotive power conversion, industrial motor drive freewheeling, and server PSU secondary-side rectification requiring stable component supply across multi-year production cycles.
Supply support for VS-40CTQ045SPBF 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 automotive, industrial, and computing markets.
The VS-40CTQ045SPBF belongs to Vishay's "Q" series of high-current Schottky rectifiers, engineered specifically for high-efficiency, high-temperature power conversion in automotive and industrial applications where low VF and ruggedness are critical.
FAQ
What is the maximum junction temperature rating for VS-40CTQ045SPBF?
The VS-40CTQ045SPBF has a maximum junction temperature (TJ max) of +150 °C, verified per Vishay document 94213. This rating enables reliable operation in under-hood automotive environments and high-ambient industrial settings. Derating curves in Figure 5 confirm usable current capacity up to 116 °C case temperature at full 20 A per leg. The VS-40CTQ045SPBF must be thermally managed to ensure TJ does not exceed this limit during continuous operation.
Is VS-40CTQ045SPBF pin-compatible with VS-40CTQ045-1PbF?
No, VS-40CTQ045SPBF and VS-40CTQ045-1PbF are not pin-compatible. VS-40CTQ045SPBF uses the TO-263AB (D2PAK) package with 3-pin lead assignment (Anode1–Cathode–Anode2), while VS-40CTQ045-1PbF uses TO-262AA (I²PAK) with identical pin numbering but different mechanical dimensions and thermal pad layout. PCB layouts must be redesigned when substituting between these variants. Both share identical electrical specs, but VS-40CTQ045SPBF is the surface-mount version referenced in this product page.
Does VS-40CTQ045SPBF support high-frequency switching above 500 kHz?
Yes, VS-40CTQ045SPBF supports high-frequency operation up to 1 MHz, enabled by its low 2800 pF junction capacitance per leg and 8.0 nH typical series inductance. The datasheet confirms stable performance in switching power supplies and converters, with no specified upper frequency limit-only constrained by external circuit parasitics and thermal limits. At 500 kHz, the VS-40CTQ045SPBF maintains low switching loss due to absence of minority-carrier storage delay inherent in PN diodes.
What is the avalanche energy rating of VS-40CTQ045SPBF and how is it tested?
The VS-40CTQ045SPBF has a non-repetitive avalanche energy rating (EAS) of 20 mJ per leg, measured at TJ = 25 °C with IAS = 3 A and L = 4.40 mH per Vishay document 94213. This rating is validated using the unclamped inductive test circuit shown in Figure 8, where energy is dissipated within the die during controlled inductive turn-off. The VS-40CTQ045SPBF's guard ring and optimized Schottky barrier ensure consistent avalanche behavior without parametric shift after repeated events.
How does the common-cathode configuration of VS-40CTQ045SPBF affect PCB layout?
The common-cathode configuration of VS-40CTQ045SPBF consolidates both cathodes into a single Pin 2 connection, reducing net count and minimizing ground loop area in dual-leg topologies. This allows symmetrical trace routing from each anode (Pins 1 and 3) to respective switch nodes while tying the cathode directly to a solid thermal plane. Layout benefits include lower EMI, improved thermal spreading via the exposed pad, and elimination of cathode bonding wire inductance-critical for high-di/dt applications like motor drive freewheeling. The VS-40CTQ045SPBF footprint is optimized for this topology per JEDEC TO-263AB standards.
VS-40CTQ045SPBF 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:
- Discontinued at Digi-Key
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 530 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 3 mA @ 45 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
VS-40CTQ045SPBF FAQ
1.How can I place an order for VS-40CTQ045SPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-40CTQ045SPBF 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-40CTQ045SPBF reliable?
The price and inventory of VS-40CTQ045SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-40CTQ045SPBF is usually 5 days.
3.What payment methods are accepted for VS-40CTQ045SPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-40CTQ045SPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-40CTQ045SPBF?
VS-40CTQ045SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-40CTQ045SPBF 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-40CTQ045SPBF?
For technical support, including VS-40CTQ045SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-40CTQ045SPBF requirements.
6.How does Aetrix verify that VS-40CTQ045SPBF is sourced from the original manufacturer or authorized distributors?
All VS-40CTQ045SPBF 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-40CTQ045SPBF meets industry standards.
7.What is the process for return or replacement of VS-40CTQ045SPBF?
All VS-40CTQ045SPBF units undergo pre-shipment inspection (PSI). If there is an issue with VS-40CTQ045SPBF, 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-40CTQ045SPBF part is unused and in its original packaging.
Return procedure for VS-40CTQ045SPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VS-40CTQ045SPBF Tags
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