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Diodes Incorporated SDT20120CT
- Part No.:
- SDT20120CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SDT20120CT.pdf
- Description:
- DIODE ARR SCHOT 120V 10A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:50
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Product details
Overview
SDT20120CT from Diodes Incorporated is a 20A dual-leg Trench Schottky rectifier in TO220AB package, rated at 120V VRRM, 10A average current per leg, 0.88V max forward voltage at 10A/25°C, and 80µA max reverse leakage at 120V/25°C - optimized for high-efficiency DC-DC converters and AC-DC adapters.
For engineers reviewing the SDT20120CT datasheet, SDT20120CT pinout, SDT20120CT application, or SDT20120CT equivalent, key selection criteria include thermal resistance (2°C/W junction-to-case), soft fast switching behavior, high-temperature leakage stability up to 150°C, and RoHS-compliant matte tin terminals suitable for automotive-grade power supply designs.
Technical Context
This dual-diode Schottky rectifier integrates two independent 120V/10A legs in a single TO220AB thermally enhanced package, enabling synchronous or interleaved rectification topologies without cross-coupling. Its trench-based epitaxial structure delivers lower VF and superior IR stability versus planar Schottkys.
The device operates across –55°C to +150°C with derated current above 25°C case temperature, and exhibits typical junction capacitance of ~1000pF at 0V reverse bias (1MHz), supporting high-frequency switching up to 500kHz in buck-derived topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 120V - maximum repetitive reverse blocking voltage per leg; supports 48V–96V bus systems with 20% margin. |
| IO (per leg) | 10A - continuous average forward current per diode leg at 25°C case temperature; total device rating is 20A. |
| VF max | 0.88V @ 10A/25°C - low conduction loss enables >95% efficiency in 12V-output DC-DC converters. |
| IR max | 80µA @ 120V/25°C - ultra-low leakage preserves standby power in energy-sensitive adapters. |
| RθJC | 2°C/W - thermal resistance enables 10A/leg operation with minimal heatsink in space-constrained industrial PSUs. |
| TJ range | –55°C to +150°C - qualified for under-hood automotive and industrial ambient environments. |
| Package | TO220AB - industry-standard through-hole power package with isolated tab, UL 94V-0 molded plastic body. |
Pinout & Package
TO220AB package with electrically isolated metal tab (pin 3), three leads: Pin 1 (Anode Leg 1), Pin 2 (Cathode Common), Pin 3 (Isolated Tab / Thermal Pad). Cathode is internally commoned between both legs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Leg 1 | Input terminal for first Schottky diode; connects to switching node in synchronous rectifier stage. |
| Pin 2 | Common Cathode | Shared output node for both legs; ties to output rail or ground return path in center-tapped configurations. |
| Pin 3 | Isolated Metal Tab | Thermal interface only - no electrical connection; mounted to heatsink without insulator required. |
Key Features
| Feature | Design Value |
|---|---|
| Low Forward Voltage Drop | 0.65V typ @ 10A/125°C - reduces conduction loss by ≥30% vs. standard silicon rectifiers in high-temp operation. |
| Soft, Fast Switching | No reverse recovery charge (Qrr ≈ 0) - eliminates switching spikes and EMI in high-frequency SMPS. |
| High-Temp Leakage Stability | 20µA max @ 120V/125°C - maintains <1mW standby dissipation in 5V/12V adapter outputs. |
| Lead-Free & Green | RoHS 3 compliant, halogen- and antimony-free (<900ppm Br+Cl, <1000ppm Sb) - meets automotive PPAP and IATF 16949 requirements. |
Applications
| Server VRM Output Stage | Industrial AC-DC Adapter |
|---|---|
Use Scenario: High-current, low-voltage output rectification in 48V-input server buck converters delivering 12V@60A. IC Role / Device Role / Timing Role: Dual-leg synchronous rectifier replacing MOSFETs in secondary-side topology; cathode-common configuration simplifies PCB layout. Use Value: 0.88V VF minimizes conduction loss at 10A/leg, while 2°C/W RθJC enables direct heatsink mounting without thermal interface pads. |
Use Scenario: Universal input (90–264VAC) adapter for industrial control panels requiring 24V/5A output with low no-load consumption. IC Role / Device Role / Timing Role: Output freewheel diode in flyback converter; leverages soft switching to reduce EMI filter size. Use Value: 80µA IR at 25°C and 20µA at 125°C ensures <50mW standby loss, meeting IEC 62301 Class B requirements. |
| Automotive Infotainment PSU | Telecom DC-DC Module |
Use Scenario: 12V-to-5V/3.3V intermediate bus conversion in head unit power supply operating at –40°C to +105°C ambient. IC Role / Device Role / Timing Role: Secondary-side rectifier in active-clamp forward converter; trench structure ensures stable VF across temperature. Use Value: –55°C to +150°C TJ rating and AEC-Q101 readiness support extended automotive qualification without derating. |
Use Scenario: 48V input telecom brick supplying 12V/10A to baseband processing boards with strict thermal constraints. IC Role / Device Role / Timing Role: Primary-side OR-ing diode in redundant power module; dual-leg design allows parallel operation without current-sharing resistors. Use Value: Common-cathode topology enables compact dual-phase layout; 120A IFSM withstands hot-swap transients without failure. |
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-20CPH12 | Same 120V/10A/leg rating but higher VF (0.92V max @ 10A/25°C); TO247AC package with higher RθJC (1.5°C/W). | Requires larger heatsink due to TO247 thermal path; less suitable for dense board layouts. | Select when higher surge rating (150A IFSM) is prioritized over footprint and VF. |
| ON Semiconductor MBR20120CT | Identical TO220AB package and pinout; slightly higher IR (100µA @ 120V/25°C) and wider VF distribution (0.95V max). | Acceptable for non-automotive commercial adapters where leakage margin is relaxed. | Choose for cost-sensitive volume production where Diodes' green compliance is not mandatory. |
Compared with VS-20CPH12 and MBR20120CT, SDT20120CT offers the lowest VF and tightest leakage spec in TO220AB, making it optimal for thermally constrained, high-efficiency, and automotive-qualified designs - especially where 0.88V conduction loss and 80µA leakage directly impact system efficiency targets.
Availability
SDT20120CT is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and automotive infotainment power supplies requiring stable component supply, long-term lifecycle support, and RoHS 3–compliant sourcing.
Supply support for SDT20120CT 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' Trench Schottky Rectifier product line, engineered specifically for high-efficiency, high-temperature power conversion in computing, industrial, and automotive applications - emphasizing low VF, soft switching, and AEC-Q101 readiness.
FAQ
Is SDT20120CT pin-compatible with MBR20120CT?
Yes - both devices use identical TO220AB package with Anode–Cathode–Tab pinout (Pin 1 = Anode Leg 1, Pin 2 = Common Cathode, Pin 3 = Isolated Tab). No PCB redesign is needed for drop-in replacement, though thermal and leakage performance differs.
What is the maximum junction temperature during continuous 10A operation per leg?
At 10A/leg and 25°C case temperature, power dissipation is ~8.8W (10A × 0.88V). With RθJC = 2°C/W, junction rise is 17.6°C - resulting in TJ ≈ 42.6°C. Derating begins above 25°C case temperature per Figure 4; full 10A/leg is sustainable up to TC = 100°C.
Does SDT20120CT meet AEC-Q101 requirements?
While not pre-qualified as AEC-Q101, this part is manufactured in IATF 16949–certified facilities and supports PPAP documentation. Diodes states it is "for automotive applications requiring specific change control" - qualification requires customer-led testing per AEC-Q101 Rev D, including HTGB, HTRB, and TCT.
Can SDT20120CT be used in parallel with another unit for 40A total output?
No - the device has no internal current-sharing features. Parallel operation requires external ballast resistors or active current balancing. Its common-cathode architecture also prevents independent leg control; for >20A, consider multi-phase designs or higher-rated alternatives like SDT30120CT.
SDT20120CT 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:
- 880 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 80 µA @ 120 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
SDT20120CT FAQ
1.How can I place an order for SDT20120CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SDT20120CT 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 SDT20120CT reliable?
The price and inventory of SDT20120CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT20120CT is usually 5 days.
3.What payment methods are accepted for SDT20120CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT20120CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDT20120CT?
SDT20120CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDT20120CT 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 SDT20120CT?
For technical support, including SDT20120CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT20120CT requirements.
6.How does Aetrix verify that SDT20120CT is sourced from the original manufacturer or authorized distributors?
All SDT20120CT 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 SDT20120CT meets industry standards.
7.What is the process for return or replacement of SDT20120CT?
All SDT20120CT units undergo pre-shipment inspection (PSI). If there is an issue with SDT20120CT, 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 SDT20120CT part is unused and in its original packaging.
Return procedure for SDT20120CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDT20120CT 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
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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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