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Diodes Incorporated SDT40A100CT
- Part No.:
- SDT40A100CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SDT40A100CT.pdf
- Description:
- DIODE ARR SCHOT 100V 20A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:1
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Product details
Overview
SDT40A100CT from Diodes Incorporated is a 40A dual common-cathode trench Schottky rectifier in TO220AB package, rated for 100V reverse voltage per leg, with max 0.72V forward voltage at 20A/25°C and 120µA reverse leakage at 100V/25°C; used as output rectifier in high-efficiency DC-DC converters and AC-DC adapters.
For engineers reviewing the SDT40A100CT datasheet, SDT40A100CT pinout, SDT40A100CT application, or SDT40A100CT equivalent, key selection criteria include per-leg thermal resistance (2°C/W), soft switching behavior, high-temperature IR stability (25mA at 125°C), and AEC-Q101 readiness for automotive power stages.
Technical Context
This dual-diode device integrates two independent 20A Schottky junctions sharing a common cathode terminal, enabling synchronous rectification or dual-output configurations. Its trench MOS structure delivers lower VF than planar Schottkys while maintaining low stored charge and soft recovery.
Thermal performance is defined per leg: RθJC = 2°C/W (TO220AB) with 50mm × 50mm × 23mm heatsink; derating curves show usable IO up to 25A at TC = 85°C. Reverse leakage remains <25mA at VR = 100V and TJ = 125°C - critical for high-ambient industrial power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage per diode leg; defines safe operating range in 48V–60V bus applications. |
| IO (per leg) | 20 A - Average forward current rating per diode at TA = 25°C; total device rating is 40A with shared cathode. |
| VF max | 0.72 V @ 20A/25°C - Low conduction loss enables >94% efficiency in 12V-output buck converters at full load. |
| IR max | 120 µA @ 100V/25°C - Ultra-low leakage preserves standby power in energy-sensitive adapters and PoE injectors. |
| RθJC | 2 °C/W (TO220AB) - Enables direct heatsink mounting for thermally constrained 50W–100W power stages without forced air. |
| IFSM | 250 A @ 8.3ms - Withstands inrush surges in hot-plug and cold-start scenarios without degradation. |
| Junction Cap. | ~1000 pF @ VR = 0V, f = 1MHz - Low capacitance minimizes switching noise and EMI in MHz-range synchronous rectifiers. |
Pinout & Package
Package: TO220AB (Generic), molded plastic, UL 94V-0 rated, matte tin-plated copper leadframe, 1.85g weight. Mounting tab is cathode (pin 3); pins 1 and 2 are anodes of two independent diode legs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode Leg 1 | Input terminal for first Schottky diode; connects to transformer secondary or switch node in half-bridge LLC. |
| Pin 2 | Anode Leg 2 | Input terminal for second Schottky diode; supports dual-output or interleaved rectification topologies. |
| Pin 3 (Tab) | Common Cathode | Electrically connected to both diode cathodes; serves as main output return path and thermal interface to heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| Trench Schottky architecture | Reduces VF by ~0.1V vs. planar equivalents at 20A, directly lowering conduction loss and thermal stress. |
| Soft, fast switching | Negligible reverse recovery charge (Qrr ≈ 0) eliminates snubber circuits and reduces EMI in high-frequency SMPS. |
| High-temp IR stability | Leakage stays ≤25mA at 125°C - ensures reliability in under-hood automotive DC-DC modules and industrial motor drives. |
| Lead-free & Green | RoHS 3 compliant, halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb), meeting automotive and EU environmental mandates. |
| AEC-Q101 qualified | Manufactured in IATF 16949-certified facilities; supports PPAP documentation for automotive power system qualification. |
Applications
| Server VRM Output Rectification | Automotive DC-DC Converter |
|---|---|
Use Scenario: 48V-to-12V bidirectional buck converter in EV battery management systems. IC Role / Device Role / Timing Role: Dual-leg common-cathode Schottky rectifier handling peak 35A output current with minimal conduction loss. Use Value: 0.72V VF at 20A reduces power dissipation by 1.8W per leg vs. silicon diodes, enabling passive cooling in compact under-hood enclosures. |
Use Scenario: 12V auxiliary power supply in ADAS domain controllers requiring high reliability at 105°C ambient. IC Role / Device Role / Timing Role: Output rectifier in isolated flyback supplying 5V/3A to radar SoCs and CAN transceivers. Use Value: Stable 25mA IR at 125°C prevents thermal runaway during sustained high-load operation, supporting ASIL-B functional safety compliance. |
| Industrial PoE++ PSE | Telecom AC-DC Adapter |
Use Scenario: 90W Power over Ethernet (IEEE 802.3bt Type 4) power sourcing equipment with dual 4-pair delivery. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier in active-clamp forward topology delivering 57V/1.6A per port. Use Value: Low 1000pF junction capacitance minimizes capacitive coupling noise into Ethernet PHY lines, preserving signal integrity. |
Use Scenario: Universal-input (90–264VAC), 65W laptop adapter with active clamp flyback and synchronous rectification. IC Role / Device Role / Timing Role: Dual-anode rectifier providing 20A/leg output for +20V and +5V rails with shared cathode return. Use Value: Soft switching behavior eliminates ringing on transformer secondary, reducing need for RC snubbers and easing EMI filter design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual common-cathode Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-40CPH01-M3 | Same 100V VRRM, but 40A total (20A/leg); VF = 0.75V @ 20A/25°C; RθJC = 2.5°C/W; no AEC-Q101 claim. | Valid for industrial SMPS but lacks automotive qualification documentation and tighter IR spec at high temperature. | Prefer when cost sensitivity outweighs automotive compliance and thermal margin requirements. |
| ON Semiconductor MBR40100CT | 100V/40A, VF = 0.78V @ 20A/25°C; IR = 200µA @ 100V/25°C; RθJC = 2.2°C/W; RoHS-compliant but not "Green" certified. | Suitable for commercial adapters but higher leakage limits use in high-temperature PoE or server VRMs. | Select where legacy footprint compatibility is required and halogen-free status is not mandated. |
Compared with VS-40CPH01-M3 and MBR40100CT, SDT40A100CT offers superior high-temperature leakage control (25mA vs. ≥50mA at 125°C), lower VF, and formal AEC-Q101 support - making it the preferred choice for thermally aggressive automotive and industrial power designs.
Availability
SDT40A100CT is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and automotive DC-DC modules requiring stable component supply, long-lifecycle availability, and traceable RoHS/Green compliance.
Supply support for SDT40A100CT 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 the Americas.
This device belongs to Diodes' high-current trench Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive, industrial, and computing applications where thermal stability and low VF are critical.
FAQ
Is SDT40A100CT suitable for automotive applications?
Yes - SDT40A100CT is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101 in the standard part number, Diodes confirms it meets AEC-Q101 stress test requirements for high-reliability automotive power stages when specified with change control.
What is the difference between SDT40A100CT and SDT40A100CTFP?
SDT40A100CT uses the TO220AB (Generic) package, while SDT40A100CTFP uses the ITO220AB (Type HE) variant - offering improved thermal resistance (RθJC = 4°C/W vs. 2°C/W), enhanced creepage/clearance, and optimized leadframe geometry for automated assembly. Both share identical electrical specs.
Can SDT40A100CT be used in parallel configurations?
No - the device is not characterized for parallel operation due to inherent forward voltage mismatch between legs. For higher current, use multiple discrete single-diode packages with matched VF binning or select a higher-rated single-die alternative like SDT60A100CT.
Does SDT40A100CT require a heatsink in typical operation?
Yes - at full 20A/leg continuous current, junction temperature exceeds safe limits without thermal management. With its 2°C/W RθJC, a minimum 50mm × 50mm × 23mm aluminum heatsink is required to maintain TJ ≤ 125°C at TA = 50°C ambient.
SDT40A100CT 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:
- 720 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 120 µA @ 100 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
SDT40A100CT FAQ
1.How can I place an order for SDT40A100CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SDT40A100CT 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 SDT40A100CT reliable?
The price and inventory of SDT40A100CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT40A100CT is usually 5 days.
3.What payment methods are accepted for SDT40A100CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT40A100CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDT40A100CT?
SDT40A100CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDT40A100CT 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 SDT40A100CT?
For technical support, including SDT40A100CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT40A100CT requirements.
6.How does Aetrix verify that SDT40A100CT is sourced from the original manufacturer or authorized distributors?
All SDT40A100CT 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 SDT40A100CT meets industry standards.
7.What is the process for return or replacement of SDT40A100CT?
All SDT40A100CT units undergo pre-shipment inspection (PSI). If there is an issue with SDT40A100CT, 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 SDT40A100CT part is unused and in its original packaging.
Return procedure for SDT40A100CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDT40A100CT Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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