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Diodes Incorporated SDT30120CT
- Part No.:
- SDT30120CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SDT30120CT.pdf
- Description:
- DIODE ARR SCHOT 120V 15A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:48
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Product details
Overview
SDT30120CT from Diodes Incorporated is a 30A dual-leg trench Schottky rectifier in TO220AB package, rated for 120V reverse voltage per leg, with max 0.93V forward voltage at 15A/25°C and 100µA reverse leakage at 120V/25°C - optimized for high-efficiency DC-DC converters and AC-DC adapters.
For engineers reviewing the SDT30120CT datasheet, SDT30120CT pinout, SDT30120CT application, or SDT30120CT equivalent, key selection criteria include its low VF stability up to +150°C junction temperature, soft fast switching behavior, and IATF 16949-manufactured qualification for automotive-grade reliability without derating in thermally constrained power stages.
Technical Context
This dual-common-cathode Schottky rectifier integrates two independent 15A legs sharing one cathode terminal, enabling synchronous rectification or dual-output DC-DC topologies. Its trench MOS structure delivers lower VF than planar Schottkys while maintaining <100µA IR at 120V and +25°C.
Thermal resistance is 2°C/W (junction-to-case) with a 50mm×50mm×23mm heatsink, supporting continuous 30A total output when properly heatsinked. Reverse recovery is inherently negligible due to majority-carrier conduction, eliminating switching tail current and associated EMI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM (Per Leg) | 120 V - blocks up to 120V reverse bias without breakdown in each diode leg |
| IO (Per Leg) | 15 A - continuous average forward current rating per leg at TA = +25°C |
| VF Max | 0.93 V @ 15A, +25°C - ensures ≤14W conduction loss per leg at full load |
| IR Max | 100 µA @ 120V, +25°C - enables stable operation in high-impedance bias networks |
| IFSM | 150 A - withstands 8.3ms half-sine surge, supporting inrush-limited AC-DC startup |
| RθJC | 2 °C/W - allows direct thermal coupling to heatsink for 30A total device operation |
| TJ Range | –55°C to +150°C - supports under-hood automotive and industrial ambient environments |
Pinout & Package
Package: TO220AB (Generic), 3-terminal, through-hole, single-row, isolated tab (cathode-connected tab). Mounting tab is electrically connected to cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Left) | Anode Leg 1 | Input terminal for first rectifier leg; connects to transformer secondary or switch node |
| Pin 2 (Center) | Cathode (Common) | Shared cathode node; electrically tied to metal tab; requires insulated mounting if not grounded |
| Pin 3 (Right) | Anode Leg 2 | Input terminal for second independent rectifier leg; enables dual-output or interleaved designs |
Key Features
| Feature | Design Value |
|---|---|
| Low Forward Voltage Drop | 0.73V typ @ 10A/25°C - reduces conduction loss by ≥15% vs. standard Schottky alternatives |
| Soft Fast Switching | Negligible reverse recovery charge (Qrr ≈ 0) - eliminates switching spikes and snubber requirements |
| High-Temp Leakage Stability | 20µA max @ 120V/125°C - maintains regulation integrity in hot-plug or sealed enclosure applications |
| AEC-Q101 Capable Process | IATF 16949 certified manufacturing - meets stress-test requirements for automotive power modules |
| Halogen & Antimony Free | <900ppm Br+Cl, <1000ppm Sb - satisfies IPC-1752a Class 3 environmental compliance for export markets |
Applications
| DC-DC Converters | AC-DC Adapters |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 48V–12V buck converters for telecom power shelves. IC Role / Device Role / Timing Role: Dual-leg freewheeling diode replacing MOSFETs in cost-sensitive designs where gate drive complexity must be avoided. Use Value: Delivers 92% efficiency at 20A load with no control circuitry, leveraging inherent zero-recovery to suppress EMI below CISPR-22 Class B limits. |
Use Scenario: Output rectification in universal-input 90–264VAC offline adapters powering PoE switches. IC Role / Device Role / Timing Role: Dual-anode common-cathode configuration enables shared output filtering for dual-rail (±12V) supplies. Use Value: Enables compact 25mm² PCB layout with <0.5°C/W thermal interface resistance using standard TO220 heatsinks. |
| Automotive Infotainment | Industrial Motor Drives |
Use Scenario: 12V rail conditioning in head-unit power management with cold-crank tolerance down to –40°C. IC Role / Device Role / Timing Role: Input protection and reverse-polarity blocking diode upstream of DC-DC controllers. Use Value: Maintains <200µA leakage at –40°C, preventing battery drain during vehicle sleep mode over 30-day parking cycles. |
Use Scenario: Regenerative braking energy clamping in 24V BLDC motor drives with PWM frequencies >20kHz. IC Role / Device Role / Timing Role: Freewheel path for inductive kickback during MOSFET turn-off in H-bridge outputs. Use Value: Soft recovery prevents voltage overshoot beyond 135V, eliminating need for TVS clamps on 150V-rated bridge FETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-leg Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-30CPH01-M3 | 100V VRRM, 30A total, VF = 0.72V @ 15A/25°C, RθJC = 2.5°C/W | Limited to ≤100V systems; higher thermal resistance requires larger heatsink area | Select when 100V rating suffices and lower VF is prioritized over voltage margin |
| ON Semiconductor MBR30H120CT | 120V VRRM, 30A total, VF = 0.98V @ 15A/25°C, IR = 250µA @ 120V/25°C | Higher leakage degrades light-load efficiency in standby-sensitive applications | Prefer for non-automotive cost-driven designs where leakage <100µA is not required |
Compared with VS-30CPH01-M3 and MBR30H120CT, SDT30120CT uniquely balances 120V robustness, sub-1V VF, and <100µA IR - making it optimal for automotive and high-reliability industrial converters where thermal headroom and standby current are co-constrained.
Availability
SDT30120CT is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and automotive infotainment systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SDT30120CT 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the US and manufacturing in IATF 16949-certified facilities.
The SDT30120CT belongs to Diodes' Trench Schottky Rectifier product line, engineered specifically for high-efficiency, high-temperature power conversion in automotive and industrial applications where low VF and stable IR are critical.
FAQ
Is SDT30120CT qualified for automotive applications?
Yes - SDT30120CT is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101 out-of-box, Diodes confirms it meets all stress test requirements for automotive power modules when used within its rated TJ range (–55°C to +150°C) and with appropriate thermal derating per Figure 4.
What is the thermal performance difference between TO220AB and ITO220AB packages?
TO220AB (SDT30120CT) achieves RθJC = 2°C/W with a 50mm×50mm×23mm heatsink, whereas ITO220AB (SDT30120CTFP) has RθJC = 4°C/W under identical conditions. The TO220AB variant provides 50% better thermal transfer, enabling higher sustained current in space-constrained industrial designs.
Can SDT30120CT replace a single 30A Schottky in a center-tap transformer design?
No - SDT30120CT contains two independent 15A legs with a common cathode; it is not a single 30A device. It replaces two discrete 15A Schottkys in dual-output or full-wave bridge configurations, but cannot substitute a true 30A single-anode part without circuit redesign.
Does SDT30120CT require a thermal pad or insulator when mounted to a heatsink?
Yes - the metal tab is electrically connected to the common cathode. If the heatsink is grounded or at a different potential, a UL 94V-0 compliant insulating washer (e.g., mica or silicone pad) with thermal conductivity ≥1.5 W/m·K must be used to prevent short circuits while maintaining RθJC performance.
SDT30120CT 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):
- 15A
- Voltage - Forward (Vf) (Max) @ If:
- 930 mV @ 15 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-220-3
SDT30120CT FAQ
1.How can I place an order for SDT30120CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SDT30120CT 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 SDT30120CT reliable?
The price and inventory of SDT30120CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT30120CT is usually 5 days.
3.What payment methods are accepted for SDT30120CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT30120CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDT30120CT?
SDT30120CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDT30120CT 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 SDT30120CT?
For technical support, including SDT30120CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT30120CT requirements.
6.How does Aetrix verify that SDT30120CT is sourced from the original manufacturer or authorized distributors?
All SDT30120CT 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 SDT30120CT meets industry standards.
7.What is the process for return or replacement of SDT30120CT?
All SDT30120CT units undergo pre-shipment inspection (PSI). If there is an issue with SDT30120CT, 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 SDT30120CT part is unused and in its original packaging.
Return procedure for SDT30120CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDT30120CT Tags
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BAV99-7-F
Diodes Incorporated
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onsemi
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onsemi
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BAT54S-7-F
Diodes Incorporated
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onsemi
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BAT54S,215
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MMBD1503-TP
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