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Diodes Incorporated SDT20B45VCT
- Part No.:
- SDT20B45VCT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SDT20B45VCT.pdf
- Description:
- DIODE ARR SCHOTT 45V 10A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:4,644
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Product details
Overview
SDT20B45VCT from Diodes Incorporated is a 20A dual-leg Trench Schottky rectifier in TO220AB package, rated for 45V peak reverse voltage, with max 0.54V forward voltage at 10A/25°C and 0.3mA reverse leakage at 45V/25°C. It serves as a high-efficiency freewheel or output rectifier in DC-DC converters and AC-DC adapters.
For engineers reviewing the SDT20B45VCT datasheet, SDT20B45VCT pinout, SDT20B45VCT application, or SDT20B45VCT equivalent, key selection criteria include its low VF stability up to +125°C, soft switching behavior, 120A non-repetitive surge rating, and AEC-Q101 readiness for automotive power stages.
Technical Context
This dual-common-cathode Schottky rectifier integrates two independent 10A legs sharing one cathode terminal, enabling synchronous or interleaved rectification topologies. Its trench MOS structure delivers lower VF than planar Schottkys while maintaining <0.075mA IR at 125°C - critical for high-temperature DC-DC output stages.
The device exhibits soft reverse recovery (no hard snap-off) and low junction capacitance (~1000pF at 4V), minimizing EMI in high-frequency switching supplies. Thermal resistance RθJC is 2°C/W with standard 50×50×23mm heatsink, supporting continuous 20A conduction when properly heatsinked.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum blocking voltage per leg; defines safe operation in 36V nominal bus systems. |
| IO (per leg) | 10 A - Continuous DC current rating per anode leg at 25°C ambient with heatsink. |
| VF max | 0.54 V @ 10A/25°C - Low conduction loss enables >95% efficiency in 12V→5V buck converters. |
| IR max | 0.3 mA @ 45V/25°C - Ultra-low leakage preserves standby power in always-on adapter circuits. |
| IFSM | 120 A - Withstands 8.3ms half-sine surge; supports inrush current handling in hot-plug designs. |
| RθJC | 2 °C/W - Enables thermal design with modest heatsinking for 20A total device current. |
| Junction temp | −55 to +150 °C - Rated for under-hood automotive environments and industrial power enclosures. |
Pinout & Package
Package: TO220AB (Generic), molded plastic case with UL 94V-0 flammability rating, matte tin-plated copper leadframe, 1.85g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (A1) | Input terminal for first rectifier leg | Accepts positive input from transformer secondary or switch node; electrically isolated from A2. |
| Anode 2 (A2) | Input terminal for second rectifier leg | Enables dual-output or interleaved configuration; shares cathode with A1 leg. |
| Cathode (K) | Common output terminal | Single low-impedance return path for both legs; mounted to heatsink via tab for thermal + electrical connection. |
Key Features
| Feature | Design Value |
|---|---|
| Trench Schottky architecture | Reduces forward voltage by ~0.1V vs. planar Schottky at 10A, directly cutting conduction losses. |
| Soft, fast switching | Eliminates reverse recovery spikes, reducing EMI filter component count in compact adapters. |
| High-temp IR stability | Leakage remains ≤50µA at 125°C - avoids thermal runaway in sealed power modules. |
| AEC-Q101 readiness | Manufactured in IATF 16949 facilities; supports PPAP for automotive DC-DC and body control units. |
Applications
| DC-DC Converters | AC-DC Adapters |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 300kHz–1MHz isolated buck-boost converters for telecom power supplies. IC Role / Device Role / Timing Role: Dual-leg freewheel diode replacing MOSFETs in cost-sensitive designs; conducts during low-side switch off-time. Use Value: 0.48V VF at 125°C reduces output stage loss by 1.2W vs. legacy Si diodes, easing thermal management. | Use Scenario: Output rectification in universal-input (90–264VAC) laptop adapters delivering 19.5V/4.62A. IC Role / Device Role / Timing Role: Primary rectifier in bridgeless PFC front-end or secondary-side 45V-rated output stage. Use Value: 0.3mA max IR at 25°C ensures <5mW standby dissipation, meeting DOE Level VI efficiency requirements. |
| Automotive Body Control | Industrial Motor Drives |
Use Scenario: Reverse polarity protection and load dump clamping in 12V battery-fed BCM modules. IC Role / Device Role / Timing Role: Blocking diode in power distribution network; handles 120A surge during load dump transients. Use Value: 120A IFSM rating meets ISO 7637-2 Pulse 5a without external TVS, simplifying layout. | Use Scenario: Freewheel path for 24V DC bus in servo drive H-bridge snubber networks. IC Role / Device Role / Timing Role: Clamp diode across inductive motor windings; conducts during PWM dead-time. Use Value: Soft recovery prevents voltage overshoot >60V on 45V-rated bus, eliminating need for Zener clamps. |
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-20BQ045PBF | Same 45V/20A rating, but planar Schottky; VF = 0.57V @ 10A/25°C, higher IR at 125°C. | Lacks trench soft-switching; may require larger EMI filter in >500kHz designs. | Prefer for cost-driven, lower-frequency (<300kHz) industrial PSUs where thermal margin exists. |
| ON Semiconductor MBR2045CT | 45V/20A dual common-cathode, but older planar process; VF = 0.62V @ 10A/25°C, RθJC = 2.5°C/W. | Higher conduction loss and thermal resistance limit use in compact, sealed enclosures. | Acceptable for legacy replacement where footprint compatibility is mandatory and efficiency <94% is acceptable. |
Compared with VS-20BQ045PBF and MBR2045CT, SDT20B45VCT delivers lower VF, superior high-temp leakage control, and softer switching - making it optimal for space-constrained, high-frequency, and automotive-grade power conversion where thermal and EMI margins are tight.
Availability
SDT20B45VCT is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for SDT20B45VCT 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.
SDT20B45VCT belongs to Diodes' Trench Schottky Rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive, industrial, and computing applications where low VF and thermal stability are critical.
FAQ
Is SDT20B45VCT qualified to AEC-Q101?
No, SDT20B45VCT itself is not AEC-Q101 certified, but Diodes Incorporated states it is manufactured in IATF 16949-certified facilities and supports PPAP documentation upon request for automotive programs. Customers must perform full qualification per their internal AEC-Q101 test plan.
What is the thermal pad mounting requirement for TO220AB?
The TO220AB package tab is electrically connected to the cathode and must be mounted to a heatsink using thermally conductive, electrically insulating material (e.g., mica washer + thermal grease) if isolation is required. Direct metal-to-metal mounting is allowed only when cathode is at system ground potential.
Can SDT20B45VCT replace a single 20A Schottky in parallel configurations?
Yes - its dual-leg structure allows each 10A leg to be used independently. When paralleled externally (with matched trace lengths and thermal coupling), it achieves 20A per leg capability, but derating to 18A total is recommended for reliability above 85°C ambient.
Does SDT20B45VCT have a specified junction capacitance?
Yes - typical CJ is 1000pF at VR = 4V and f = 1MHz (per Figure 3). This value decreases with increasing reverse bias and impacts high-frequency snubber design and EMI filtering in >1MHz converters.
SDT20B45VCT 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):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 540 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 300 µA @ 45 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
SDT20B45VCT FAQ
1.How can I place an order for SDT20B45VCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SDT20B45VCT 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 SDT20B45VCT reliable?
The price and inventory of SDT20B45VCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT20B45VCT is usually 5 days.
3.What payment methods are accepted for SDT20B45VCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT20B45VCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDT20B45VCT?
SDT20B45VCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDT20B45VCT 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 SDT20B45VCT?
For technical support, including SDT20B45VCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT20B45VCT requirements.
6.How does Aetrix verify that SDT20B45VCT is sourced from the original manufacturer or authorized distributors?
All SDT20B45VCT 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 SDT20B45VCT meets industry standards.
7.What is the process for return or replacement of SDT20B45VCT?
All SDT20B45VCT units undergo pre-shipment inspection (PSI). If there is an issue with SDT20B45VCT, 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 SDT20B45VCT part is unused and in its original packaging.
Return procedure for SDT20B45VCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDT20B45VCT Tags
-
BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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