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Diodes Incorporated SDT40100CT
- Part No.:
- SDT40100CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SDT40100CT.pdf
- Description:
- DIODE ARR SCHOT 100V 20A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:50
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Product details
Overview
SDT40100CT from Diodes Incorporated is a 40A dual common-cathode trench Schottky rectifier in TO220AB package, rated for 100V reverse voltage per leg, with max 0.79V forward drop at 20A/25°C and 100µA leakage at 100V/25°C - optimized for high-efficiency DC-DC converters and AC-DC adapters.
For engineers reviewing the SDT40100CT datasheet, SDT40100CT pinout, SDT40100CT application, or SDT40100CT equivalent, this device delivers verified thermal resistance (2°C/W junction-to-case), soft fast switching behavior, and AEC-Q101 readiness for automotive power systems requiring stable high-temperature reverse leakage performance.
Technical Context
This dual-leg Schottky rectifier integrates two independent 20A/100V diodes sharing a common cathode terminal, enabling synchronous rectification or dual-output DC-DC topologies. Its trench MOS structure reduces forward voltage while maintaining low IR drift up to +150°C junction temperature.
The device operates with no minority-carrier storage delay, eliminating reverse recovery charge (Qrr ≈ 0), and exhibits <100pF total capacitance at 0V bias - critical for minimizing switching losses and EMI in high-frequency (>100kHz) power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM (Per Leg) | 100 V - Withstands repetitive 100V reverse blocking without breakdown in continuous operation. |
| IO (Per Leg) | 20 A - Sustains 20A average forward current per anode leg at TA = +25°C with heatsink. |
| VF Max | 0.79 V @ 20A, +25°C - Enables <15.8W conduction loss per leg at full load, reducing thermal stress. |
| IR Max | 100 µA @ 100V, +25°C - Ensures minimal standby power loss in high-impedance output stages. |
| RθJC | 2 °C/W - Junction-to-case thermal resistance enables efficient heat transfer to external heatsink. |
| IFSM | 200 A - Handles 8.3ms half-sine surge events (e.g., cold-start inrush) without failure. |
| TJ Range | –55°C to +150°C - Supports operation in under-hood automotive and industrial ambient environments. |
Pinout & Package
Package: TO220AB (Generic), molded plastic, UL 94V-0 rated, matte tin-plated copper leadframe, 1.85g weight. Mounting tab is cathode-connected and electrically active.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Left) | Anode 1 | Input terminal for first rectifier leg; connects to primary-side switch node in buck or flyback. |
| Pin 2 (Center) | Cathode (Common) | Shared output node; must be thermally and electrically connected to heatsink and ground plane. |
| Pin 3 (Right) | Anode 2 | Input terminal for second rectifier leg; supports dual-output or interleaved converter designs. |
Key Features
| Feature | Design Value |
|---|---|
| Low VF trench architecture | 0.79V max at 20A/25°C - cuts conduction loss by ≥25% vs. planar Schottky alternatives. |
| Soft fast switching | Zero Qrr and low stored charge - eliminates voltage spikes and snubber requirements in hard-switched topologies. |
| High-temp IR stability | 100µA @ 25°C, 20mA @ 125°C - maintains predictable leakage across automotive temperature range. |
| RoHS & Green compliant | Halogen-free (<900ppm Br/Cl), antimony-free, lead-free finish - meets IATF 16949 and EU environmental mandates. |
Applications
| DC-DC Buck Converter | AC-DC Adapter Output Stage |
|---|---|
Use Scenario: High-current 12V→5V/3.3V point-of-load conversion in server PSUs and telecom equipment. IC Role / Device Role: Synchronous rectifier replacing MOSFETs in secondary-side synchronous rectification. Use Value: Eliminates gate drive complexity and Qg-related losses while delivering <0.8V VF at 20A, improving efficiency by 1.2% over Si diodes. |
Use Scenario: Secondary-side rectification in universal-input 90–264VAC offline adapters for laptops and monitors. IC Role / Device Role: Dual-leg output rectifier handling split-rail (+12V/–12V) or redundant +5V outputs. Use Value: Common-cathode configuration simplifies PCB layout and reduces component count versus discrete diode pairs. |
| Automotive Body Control Module | Industrial Motor Drive Power Supply |
Use Scenario: 12V battery-fed DC-DC stage powering microcontrollers and CAN transceivers in BCMs. IC Role / Device Role: Freewheel diode in buck controller IC's integrated power stage or external high-side switch. Use Value: –55°C to +150°C rating and AEC-Q101 qualification ensure reliability during engine-off cold soak and under-hood hot idle. |
Use Scenario: Auxiliary 24V supply rectification in servo drive control boards operating near motors. IC Role / Device Role: Blocking diode isolating auxiliary rail from main bus during fault conditions. Use Value: Low IR drift at +125°C prevents thermal runaway when mounted on shared heatsink with IGBT drivers. |
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-40CPH01-M3 | Same 40A/100V dual common-cathode TO220AB; VF = 0.75V @ 20A/25°C; RθJC = 2.5°C/W. | Slightly higher thermal resistance limits peak power density in compact heatsink designs. | Preferred where Vishay supply chain alignment or legacy qualification is required. |
| ON Semiconductor MBR40100CT | 40A/100V dual Schottky; VF = 0.82V @ 20A/25°C; IR = 200µA @ 100V/25°C; RθJC = 2.2°C/W. | Higher leakage reduces light-load efficiency in always-on systems like IoT gateways. | Acceptable for cost-sensitive industrial adapters where 150°C operation is not required. |
Compared with VS-40CPH01-M3 and MBR40100CT, SDT40100CT offers the lowest VF (0.79V max) and tightest IR spec (100µA), making it optimal for thermally constrained, high-reliability automotive and telecom power stages where conduction loss and leakage stability are design-critical.
Availability
SDT40100CT is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and traceable RoHS/Green compliance.
Supply support for SDT40100CT 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The SDT40100CT belongs to Diodes' high-current trench Schottky rectifier product line, engineered specifically for high-efficiency, high-temperature power conversion in automotive, computing, and industrial applications.
FAQ
What is the maximum junction temperature and how does it affect derating?
The SDT40100CT supports TJ up to +150°C. Its DC forward current must be linearly derated from 20A at TC = +25°C to 0A at TC = +150°C (per Figure 4), requiring thermal design that maintains case temperature ≤100°C for 10A continuous operation. This derating curve is validated with a 50mm × 50mm × 23mm aluminum heatsink.
Is SDT40100CT qualified for automotive use?
Yes - SDT40100CT is AEC-Q101 qualified and manufactured in IATF 16949 certified facilities. It meets PPAP requirements and supports change control for automotive applications; however, final qualification documentation must be obtained directly from Diodes Incorporated for specific vehicle programs.
How does the common-cathode configuration impact PCB layout?
The shared cathode (Pin 2) serves as both electrical return and thermal interface. Layout requires direct connection to a large copper pour or heatsink, with symmetric trace routing to Anode 1 and Anode 2 to minimize loop inductance. The mounting tab must be electrically isolated from chassis ground unless system grounding scheme explicitly permits cathode-to-chassis bonding.
Can SDT40100CT replace standard silicon rectifiers in existing designs?
Yes - its 100V VRRM and 40A total current match common 1N5408 or UF5408 replacements, but VF reduction from ~1.1V to ≤0.79V lowers conduction loss by ~35%. Thermal redesign is recommended due to higher power density; verify heatsink interface and solder joint integrity under sustained 20A/leg loading.
SDT40100CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 790 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 100 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
SDT40100CT FAQ
1.How can I place an order for SDT40100CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SDT40100CT 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 SDT40100CT reliable?
The price and inventory of SDT40100CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT40100CT is usually 5 days.
3.What payment methods are accepted for SDT40100CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT40100CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDT40100CT?
SDT40100CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDT40100CT 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 SDT40100CT?
For technical support, including SDT40100CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT40100CT requirements.
6.How does Aetrix verify that SDT40100CT is sourced from the original manufacturer or authorized distributors?
All SDT40100CT 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 SDT40100CT meets industry standards.
7.What is the process for return or replacement of SDT40100CT?
All SDT40100CT units undergo pre-shipment inspection (PSI). If there is an issue with SDT40100CT, 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 SDT40100CT part is unused and in its original packaging.
Return procedure for SDT40100CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDT40100CT Tags
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BAV99-7-F
Diodes Incorporated
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BAT54S-7-F
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BAT54S,215
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MMBD1503-TP
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