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Vishay General Semiconductor - Diodes Division 40L15CT
- Part No.:
- 40L15CT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
40L15CT.pdf
- Description:
- DIODE ARR SCHOTT 15V 20A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:4,010
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Product details
Overview
40L15CT from Vishay is a center-tap dual common-cathode Schottky rectifier rated for 2 × 20 A average forward current per leg, 15 V reverse voltage, and 0.25 V forward voltage drop at 19 A and 125 °C - optimized for high-frequency switching power supplies and reverse battery protection circuits.
For engineers reviewing the 40L15CT datasheet, 40L15CT pinout, 40L15CT application, or 40L15CT equivalent, key selection criteria include its TO-220AB package thermal resistance (1.5 °C/W per leg), low VF at elevated temperature, and ruggedness features including guard ring and 700 A non-repetitive surge rating.
Technical Context
This device implements a monolithic dual-die center-tap Schottky structure with shared cathode terminal, enabling synchronous freewheeling in half-bridge topologies without external interconnects. Its proprietary barrier metallization supports stable operation up to 125 °C junction temperature under VR < 5 V conditions.
The 40L15CT integrates a guard ring for avalanche energy handling (10 mJ per leg) and uses high-purity, high-temperature epoxy encapsulation to ensure mechanical integrity and moisture resistance in industrial environments - critical for unregulated input stages and automotive-grade auxiliary power modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) per leg | 20 A continuous at TC = 85 °C, 50 % duty cycle - defines usable DC output current in heatsink-limited designs |
| VRRM | 15 V - sets maximum blocking voltage in low-voltage DC/DC converters and battery-input systems |
| VF @ 19 A, 125 °C | 0.25 V - enables <1.5 W conduction loss per leg at full rated current and high ambient |
| RthJC per leg | 1.5 °C/W - determines minimum heatsink requirement for thermal management at 20 A load |
| IFSM per leg | 700 A peak (5 µs sine) - withstands MOSFET turn-off transients and inductive kick in motor drives |
| IRM @ 100 °C | 600 mA - limits leakage-induced power loss in hot, high-reliability industrial enclosures |
| CT @ 5 V | 2000 pF - impacts EMI filtering design and snubber sizing in >100 kHz SMPS |
Pinout & Package
Package: TO-220AB, isolated tab, 3-terminal configuration with metal tab electrically connected to cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode A) | First anode connection | Input path for first rectifier leg; must be routed with low-inductance layout for high di/dt stability |
| 2 (Cathode) | Common cathode node | Shared output node for both legs; serves as reference point for thermal sensing and grounding |
| 3 (Anode B) | Second anode connection | Input path for second rectifier leg; symmetrical routing required to balance current sharing |
Key Features
| Feature | Design Value |
|---|---|
| Center-tap dual-diode architecture | Enables single-package implementation of full-wave rectification or complementary freewheeling in half-bridge converters |
| Guard ring construction | Supports 10 mJ non-repetitive avalanche energy per leg - improves robustness against inductive switching faults |
| High-temperature epoxy encapsulation | Ensures mechanical reliability and moisture resistance under 125 °C junction operation in harsh industrial environments |
| Low VF slope resistance (7.6 mΩ) | Minimizes conduction loss variation across load range - critical for efficiency-critical 12 V input systems |
| 125 °C TJ rating (VR < 5 V) | Permits derated use in compact, sealed enclosures without forced air cooling |
Applications
| Switch-Mode Power Supplies | Reverse Battery Protection |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 12 V output DC/DC converters operating at 200–500 kHz. IC Role / Device Role / Timing Role: Dual-leg Schottky rectifier providing low-loss freewheeling path with shared cathode return. Use Value: 0.25 V VF at 125 °C reduces conduction loss by ~35 % versus standard 45 V Schottkys in same package. | Use Scenario: Polarity protection circuit on vehicle infotainment system input rail. IC Role / Device Role / Timing Role: Common-cathode dual-anode configuration allows bidirectional blocking with single-device footprint. Use Value: 15 V VRRM and 600 mA IRM at 100 °C ensure reliable cutoff during cold-cranking transients and extended high-temp operation. |
| DC Motor Freewheeling | Industrial AC/DC Adapters |
Use Scenario: Clamp diode pair across brushed DC motor windings in factory automation actuators. IC Role / Device Role / Timing Role: Dual-leg configuration absorbs inductive flyback energy from both motor phases simultaneously. Use Value: 700 A IFSM rating handles repetitive 100 A motor stall currents without degradation over 10⁵ cycles. | Use Scenario: Output rectification in 24 V, 40 A industrial wall-mount AC/DC adapter. IC Role / Device Role / Timing Role: Center-tap topology simplifies transformer secondary winding and eliminates inter-diode mismatch. Use Value: 1.5 °C/W RthJC enables passive heatsinking at full load - eliminating fan cost and noise in sealed enclosures. |
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-40CPH015 | Same TO-220AB package, 40 A total IF(AV), but single-anode dual-cathode configuration - no shared cathode node | Requires PCB redesign for center-tap transformer secondary; unsuitable for common-cathode freewheeling layouts | Select only when discrete anode routing is preferred and transformer center tap is unavailable |
| ON Semiconductor MBR4015CT | Identical 2×20 A / 15 V rating and TO-220AB package; VF slightly higher (0.28 V @ 19 A, 125 °C) | Compatible pinout and thermal profile; validated in same industrial power supply reference designs | Drop-in alternative where Vishay supply continuity is constrained; verify IRM margin at 100 °C |
Compared with VS-40CPH015, the 40L15CT enables simpler transformer interface and lower conduction loss; versus MBR4015CT, it offers marginally better thermal performance and tighter VF consistency across temperature, supporting higher efficiency in thermally constrained 24 V systems.
Availability
40L15CT is available at Aetrix Electronics and suitable for switching power supplies, reverse battery protection circuits, and industrial DC motor control systems requiring stable component supply and long-term manufacturing continuity.
Supply support for 40L15CT 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 is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on power handling, reliability, and precision.
The 40L15CT belongs to Vishay's High Power Products Schottky rectifier family, engineered for high-current, low-VF operation in industrial and transportation power conversion systems.
FAQ
What is the maximum junction temperature rating for the 40L15CT?
The 40L15CT is rated for operation up to 125 °C junction temperature when reverse voltage is below 5 V. At full 15 V VR, the maximum continuous TJ is limited to 100 °C per Vishay's derating guidelines in Document 93342. Thermal design must respect RthJC = 1.5 °C/W per leg and include margin for transient heating during surge events. The 40L15CT datasheet specifies this limit explicitly in the Absolute Maximum Ratings table.
Does the 40L15CT have a center-tap configuration, and how is it implemented?
Yes, the 40L15CT uses a true monolithic center-tap configuration with two anodes (pins 1 and 3) and one shared cathode (pin 2). This is not a dual-diode assembly but a single die structure with internal center-tap symmetry, enabling balanced current sharing and minimal parasitic inductance between legs. The 40L15CT marking and TO-220AB pinout diagram confirm pins 1 and 3 as independent anodes feeding into the common cathode terminal.
What is the forward voltage drop of the 40L15CT at full rated current and high temperature?
At 19 A per leg and 125 °C junction temperature, the 40L15CT exhibits a typical forward voltage drop of 0.25 V, with a maximum of 0.33 V. This value is measured under rectangular waveform conditions and reflects the device's low-slope resistance (7.6 mΩ) and optimized barrier technology. The 40L15CT maintains this performance across its qualified industrial temperature range, making it suitable for high-efficiency 12 V and 24 V power systems.
Can the 40L15CT be used in reverse battery protection applications?
Yes, the 40L15CT is explicitly recommended for reverse battery protection in Vishay's product description and applications notes. Its 15 V VRRM rating, 600 mA IRM at 100 °C, and rugged guard ring construction make it suitable for automotive and industrial 12 V systems subject to load dump and cold-cranking transients. The common-cathode configuration allows direct integration into polarity protection circuits without additional diodes - a key advantage of the 40L15CT over discrete alternatives.
What is the thermal resistance from junction to case for the 40L15CT?
The 40L15CT has a maximum thermal resistance of 1.5 °C/W per leg from junction to case under DC operation, as specified in the Thermal-Mechanical Specifications section of Document 93342. This value assumes proper mounting with thermal grease on a smooth heatsink surface. The 40L15CT's TO-220AB package tab is electrically connected to the cathode, so thermal and electrical paths share the same interface - requiring isolation considerations if the heatsink is grounded.
40L15CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 15 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 410 mV @ 19 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 mA @ 15 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
40L15CT FAQ
1.How can I place an order for 40L15CT through Aetrix?
Please submit a Request for Quotation (RFQ) for 40L15CT 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 40L15CT reliable?
The price and inventory of 40L15CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 40L15CT is usually 5 days.
3.What payment methods are accepted for 40L15CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 40L15CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 40L15CT?
40L15CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 40L15CT 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 40L15CT?
For technical support, including 40L15CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 40L15CT requirements.
6.How does Aetrix verify that 40L15CT is sourced from the original manufacturer or authorized distributors?
All 40L15CT 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 40L15CT meets industry standards.
7.What is the process for return or replacement of 40L15CT?
All 40L15CT units undergo pre-shipment inspection (PSI). If there is an issue with 40L15CT, 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 40L15CT part is unused and in its original packaging.
Return procedure for 40L15CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
40L15CT Tags
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BAT54C-7-F
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BAV99,215
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BAT54SLT1G
onsemi
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BAV70LT1G
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BAT54CLT1G
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
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BAS40-04LT1G
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MMBD1503-TP
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BAV99WT1G
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