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Diodes Incorporated SDT20A120CT
- Part No.:
- SDT20A120CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SDT20A120CT.pdf
- Description:
- DIODE ARR SCHOT 120V 10A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,008
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Product details
Overview
SDT20A120CT from Diodes Incorporated is a 20A dual-leg trench Schottky rectifier in TO220AB package, rated for 120V reverse voltage per leg, with max 0.79V forward voltage at 10A/25°C and 100µA reverse leakage at 120V/25°C; used as freewheel or blocking diode in high-efficiency DC-DC converters and AC-DC adapters.
For engineers reviewing the SDT20A120CT datasheet, SDT20A120CT pinout, SDT20A120CT application, or SDT20A120CT equivalent, key selection criteria include thermal resistance (2°C/W junction-to-case), soft switching behavior, high-temperature leakage stability up to +150°C, and RoHS-compliant matte tin terminals on copper leadframe.
Technical Context
This dual-diode Schottky rectifier integrates two independent 10A/120V legs in a single TO220AB package, enabling shared heatsinking while maintaining electrical isolation between legs. Its trench MOS structure delivers lower VF and superior IR stability versus planar Schottkys, especially at TJ = +125°C where VF remains ≤0.67V and IR ≤20µA.
The device operates across –55°C to +150°C with no derating below +125°C, supports 150A non-repetitive surge current, and exhibits soft reverse recovery essential for EMI reduction in high-frequency switching topologies like synchronous buck and LLC resonant converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM (Per Leg) | 120 V - Maximum repetitive reverse blocking voltage without breakdown; defines safe operating range in DC-DC output stage. |
| IO (Per Leg) | 10 A - Continuous average forward current per diode leg at TA = +25°C; total device rating is 20A with shared thermal path. |
| VF Max | 0.79 V @ 10A, +25°C - Directly determines conduction loss; enables <7.9W dissipation per leg at full load before heatsink sizing required. |
| IR Max | 100 µA @ 120V, +25°C - Low leakage preserves efficiency in standby mode; rises to only 20µA at +125°C, confirming thermal robustness. |
| RθJC | 2 °C/W - Junction-to-case thermal resistance with standard heatsink; allows precise thermal design for 150°C max junction temperature. |
| IFSM | 150 A - Non-repetitive 8.3ms surge rating; withstands inrush currents in power supply startup without degradation. |
| TJ Range | –55°C to +150°C - Full industrial and automotive-grade operating envelope; no derating required up to +125°C. |
Pinout & Package
Package: TO220AB (Generic), 3-terminal molded plastic case with UL 94V-0 rating, matte tin-plated copper leadframe, 1.85g mass. Terminals are solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode 1) | Anode of first Schottky leg | Connects to switching node in half-bridge or synchronous rectifier configuration; electrically isolated from Pin 2. |
| Pin 2 (Cathode Common) | Shared cathode connection | Single low-impedance return path for both legs; mounted to heatsink via metal tab for optimal thermal transfer. |
| Pin 3 (Anode 2) | Anode of second Schottky leg | Enables dual-output or interleaved converter designs; identical electrical specs to Pin 1 but physically separate. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | VF ≤ 0.79V @ 10A/25°C reduces conduction loss by ≥15% vs. comparable 120V Si diodes, directly improving system efficiency. |
| Soft, fast switching capability | No minority-carrier storage; near-zero reverse recovery charge (Qrr) minimizes switching noise and EMI in >100kHz converters. |
| High-temperature leakage stability | IR ≤ 20µA @ 120V/+125°C ensures minimal standby power loss in thermally constrained enclosures or under-hood automotive environments. |
| Lead-free, halogen-free construction | RoHS 3 compliant with <900ppm Br+Cl and <1000ppm Sb; meets automotive PPAP and IATF 16949 manufacturing requirements. |
Applications
| DC-DC Converter Output Rectification | AC-DC Adapter Secondary Side |
|---|---|
Use Scenario: High-current, high-frequency synchronous buck converter output stage delivering 12V/10A to CPU core rail. IC Role / Device Role / Timing Role: Freewheeling Schottky rectifier replacing body diode of low-side MOSFET to reduce conduction loss and improve light-load efficiency. Use Value: 0.79V VF at 10A cuts diode conduction loss to ~7.9W vs. >12W for Si alternatives, easing thermal management on compact PCBs. |
Use Scenario: 24W wall adapter with universal input (90–264VAC) and 5V/4.8A USB-C output. IC Role / Device Role / Timing Role: Secondary-side output rectifier in flyback topology, handling continuous 4.8A with minimal voltage drop. Use Value: Stable 0.67V VF at 10A/125°C maintains tight output regulation across ambient temperatures without derating. |
| Automotive Infotainment Power Supply | Industrial PLC I/O Module Power Stage |
Use Scenario: 12V-to-3.3V/5V dual-rail power supply inside head unit operating at –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Blocking diode isolating auxiliary 5V rail from main 12V bus during cold-crank events. Use Value: 100µA IR at 25°C and only 20µA at 125°C prevents backfeed leakage that could disrupt MCU brown-out detection. |
Use Scenario: 24VDC input module powering isolated analog sensor interfaces in factory automation cabinet. IC Role / Device Role / Timing Role: Input protection and reverse polarity safeguard before DC-DC conversion to ±15V analog rails. Use Value: 150A IFSM rating absorbs transient surges from inductive load switching without failure, enhancing field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay V20120C-E3/45 | Same 120V VRRM, 10A IO per leg, but VF = 0.82V @ 10A/25°C and RθJC = 2.5°C/W. | Slightly higher conduction loss and thermal resistance; suitable where margin exists in thermal budget. | Prefer SDT20A120CT when optimizing for lowest VF or tighter thermal design. |
| ON Semiconductor MBR20120CT | 120V VRRM, 10A IO, VF = 0.85V @ 10A/25°C, IR = 200µA @ 120V/25°C - double the leakage. | Higher leakage limits use in high-temp or low-power standby systems; less stable IR vs. temperature. | SDT20A120CT preferred for automotive or industrial applications requiring <100µA IR at 25°C. |
Compared with V20120C-E3/45 and MBR20120CT, SDT20A120CT delivers the lowest VF (0.79V), best high-temperature IR stability (20µA @ 125°C), and lowest RθJC (2°C/W), making it optimal for thermally constrained, high-efficiency, or automotive-grade designs.
Availability
SDT20A120CT is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and automotive infotainment power supplies requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for SDT20A120CT 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.
SDT20A120CT belongs to Diodes' Trench Schottky Rectifier product line, engineered specifically for high-efficiency, high-temperature power conversion in computing, consumer, and automotive applications where low VF and stable IR are critical.
FAQ
What is the maximum junction temperature for SDT20A120CT?
The SDT20A120CT has an absolute maximum junction temperature of +150°C, with full-rated current supported up to +125°C case temperature. Derating begins above +125°C per Figure 4 in the datasheet, and operation is guaranteed from –55°C to +150°C.
Is SDT20A120CT suitable for automotive applications?
Yes - SDT20A120CT is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101, its construction (halogen-free, RoHS 3 compliant), thermal performance (150°C TJ), and leakage stability make it widely deployed in automotive infotainment and body control modules.
How does the TO220AB package differ from ITO220AB for this part?
SDT20A120CT uses TO220AB (Generic) with 2°C/W RθJC and 1.85g mass; SDT20A120CTFP uses ITO220AB with 4°C/W RθJC and 1.90g mass. The TO220AB variant offers superior thermal performance and is preferred for high-power density designs where heatsink interface is optimized.
Can SDT20A120CT replace a single 20A Schottky in a dual-anode configuration?
Yes - SDT20A120CT integrates two independent 10A Schottky legs sharing one cathode (Pin 2), enabling dual-output or phase-interleaved topologies. It is not a single 20A device; each leg must be rated for ≤10A average current, with total device current limited by thermal design, not current summing.
SDT20A120CT 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):
- 120 V
- Current - Average Rectified (Io) (per Diode):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 790 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 120 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AB
SDT20A120CT FAQ
1.How can I place an order for SDT20A120CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SDT20A120CT 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 SDT20A120CT reliable?
The price and inventory of SDT20A120CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT20A120CT is usually 5 days.
3.What payment methods are accepted for SDT20A120CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT20A120CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDT20A120CT?
SDT20A120CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDT20A120CT 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 SDT20A120CT?
For technical support, including SDT20A120CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT20A120CT requirements.
6.How does Aetrix verify that SDT20A120CT is sourced from the original manufacturer or authorized distributors?
All SDT20A120CT 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 SDT20A120CT meets industry standards.
7.What is the process for return or replacement of SDT20A120CT?
All SDT20A120CT units undergo pre-shipment inspection (PSI). If there is an issue with SDT20A120CT, 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 SDT20A120CT part is unused and in its original packaging.
Return procedure for SDT20A120CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDT20A120CT Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
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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
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BAV99WT1G
onsemi
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