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Diodes Incorporated SDT30A120CT
- Part No.:
- SDT30A120CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SDT30A120CT.pdf
- Description:
- DIODE ARR SCHOT 120V 15A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:5,886
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Product details
Overview
SDT30A120CT from Diodes Incorporated is a 120 V, 30 A dual common-cathode Trench Schottky rectifier in TO220AB package, delivering 0.86 V max forward voltage at 15 A and 25°C, <100 µA reverse leakage at 120 V and 25°C, and soft fast switching for DC-DC converter output rectification.
For engineers reviewing the SDT30A120CT datasheet, SDT30A120CT pinout, SDT30A120CT application, or SDT30A120CT equivalent, key selection criteria include per-leg 15 A average current rating, thermal resistance of 2°C/W (TO220AB with heatsink), high-temperature IR stability up to 125°C, and automotive-grade qualification readiness via AEC-Q101.
Technical Context
This dual-diode Schottky rectifier uses trench MOS-based architecture to achieve low VF and minimal reverse recovery charge, enabling high-efficiency secondary-side rectification in isolated DC-DC topologies. Its common-cathode configuration supports synchronous or independent leg control in center-tapped or full-wave bridge-derived designs.
The device operates across –55°C to +150°C junction temperature, with IR rising only to 20 µA at 125°C under 120 V bias - critical for maintaining efficiency in thermally constrained power supplies. Derating curves confirm 30 A total device current is sustained only below TC ≈ 70°C for TO220AB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 120 V - blocks up to 120 V reverse bias without breakdown, suitable for 48 V input DC-DC outputs with margin |
| IO (per leg) | 15 A - continuous average forward current per diode leg, defining usable output current in split-leg configurations |
| VF max | 0.86 V @ 15 A, 25°C - directly determines conduction loss (12.9 W per leg at full load) and thermal design baseline |
| IR max | 100 µA @ 120 V, 25°C - ensures minimal standby power loss and stable regulation under light/no-load conditions |
| RθJC | 2°C/W (TO220AB) - enables precise junction-to-case thermal modeling when mounted on standard 50×50×23 mm Al heatsink |
| IFSM | 180 A @ 8.3 ms - withstands typical AC line surge or inrush transients without failure |
| TJ range | –55°C to +150°C - supports operation in under-hood automotive and industrial ambient environments |
Pinout & Package
Package: TO220AB (Generic), 3-terminal molded plastic case with matte tin-plated copper leadframe, UL 94V-0 rated, 1.85 g weight. Mounting tab is cathode-connected and electrically active.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode 1) | Anode of first Schottky diode | Connects to transformer secondary or switch node; must handle full 15 A forward current and 180 A surge |
| Pin 2 (Cathode) | Common cathode terminal | Electrically tied to mounting tab; serves as shared output node and thermal path to heatsink |
| Pin 3 (Anode 2) | Anode of second Schottky diode | Independent anode for dual-output or interleaved rectification; shares cathode return path |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 0.86 V max @ 15 A/25°C reduces conduction loss by ≥25% vs. comparable planar Schottkys |
| Soft, fast switching capability | Negligible reverse recovery charge (Qrr) eliminates snubber need and EMI in high-frequency DC-DC converters |
| High-temperature leakage stability | IR = 20 µA @ 125°C/120 V ensures <0.25 mW standby dissipation per leg at elevated ambient |
| Lead-free & halogen-free construction | RoHS 3 compliant with <900 ppm Br+Cl and <1000 ppm Sb - meets automotive and industrial green procurement mandates |
Applications
| Server VRM Output Rectification | Industrial 48 V DC-DC Converter |
|---|---|
Use Scenario: High-current, high-efficiency 12 V output stage in server voltage regulator modules using center-tapped transformer. IC Role / Device Role / Timing Role: Dual-leg common-cathode Schottky rectifier replacing two discrete diodes to reduce layout area and parasitic inductance. Use Value: 0.86 V VF enables >94% efficiency at 100 A system output (two parallel devices), with thermal resistance supporting compact heatsink integration. | Use Scenario: Primary 48 V to 12 V isolated DC-DC module in programmable logic controller (PLC) power supply. IC Role / Device Role / Timing Role: Secondary-side freewheeling and rectifying diode in forward or push-pull topology. Use Value: Stable 100 µA IR at 25°C and 20 µA at 125°C prevents output voltage drift during thermal cycling in enclosed enclosures. |
| Automotive ADAS Camera Power Supply | Telecom Remote Radio Unit (RRU) |
Use Scenario: Compact 12 V output stage in AEC-Q101-qualified camera ECU supplying image sensor and ISP. IC Role / Device Role / Timing Role: Blocking diode and rectifier in dual-input redundancy circuit with hot-swap capability. Use Value: –55°C to +150°C TJ range and IATF 16949 manufacturing ensure reliability in under-hood vibration and thermal shock environments. | Use Scenario: 24 V/48 V intermediate bus rectification in outdoor RRU power subsystem exposed to wide ambient swings. IC Role / Device Role / Timing Role: Freewheel diode in synchronous buck controller's low-side path, handling 15 A continuous per leg. Use Value: Soft switching eliminates ringing on gate drivers, reducing conducted EMI that would otherwise interfere with RF front-end sensitivity. |
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-30CPH12 | Same 120 V VRRM, 15 A/leg IO, but VF = 0.89 V @ 15 A/25°C; RθJC = 2.5°C/W | Higher conduction loss (+0.45 W/leg) and slightly reduced thermal margin | Select if legacy Vishay footprint compatibility required; verify heatsink adequacy at full load |
| ON Semiconductor MBR30120CT | Identical pinout and ratings, but VF = 0.92 V @ 15 A/25°C; IR = 150 µA @ 120 V/25°C | Higher leakage increases no-load power by ~50 µW/leg; less suitable for ultra-low-power standby | Prefer for cost-sensitive industrial designs where 30 mV VF penalty is acceptable |
Compared with VS-30CPH12 and MBR30120CT, SDT30A120CT offers the lowest VF (0.86 V) and tightest IR spec (100 µA), making it optimal for high-efficiency, thermally constrained, or low-standby-power DC-DC applications where every millivolt and microamp matters.
Availability
SDT30A120CT is available at Aetrix Electronics and suitable for server VRMs, industrial 48 V DC-DC converters, and automotive ADAS camera power supplies requiring stable component supply, RoHS 3 compliance, and AEC-Q101 qualification pathway support.
Supply support for SDT30A120CT 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, specializing in high-performance power management, signal integrity, and protection solutions for industrial, computing, and automotive markets.
The SDT30A120CT belongs to Diodes' Trench Schottky Rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in isolated DC-DC converters operating up to 1 MHz switching frequency.
FAQ
Is SDT30A120CT qualified to AEC-Q101?
No - SDT30A120CT itself is not AEC-Q101 certified, but Diodes states it is manufactured in IATF 16949-certified facilities and supports PPAP documentation. Customers requiring formal AEC-Q101 qualification should contact Diodes directly to request the automotive-grade variant or qualification roadmap.
What is the maximum allowable case temperature for continuous 30 A operation?
Per Figure 4, continuous 30 A total device current is only sustainable below TC ≈ 70°C for TO220AB. At TC = 100°C, derated IO drops to ~10 A per leg (20 A total); thermal design must ensure case temperature remains within this limit under worst-case airflow and ambient conditions.
Can SDT30A120CT replace a single 30 A discrete Schottky diode?
No - SDT30A120CT is a dual common-cathode device with two 15 A legs. It cannot substitute a single 30 A diode unless the circuit topology explicitly uses split anodes (e.g., center-tapped transformer). Using only one leg forfeits half the rated current and violates thermal derating guidelines.
Does the mounting tab carry electrical potential, and is it isolated?
Yes - the metal tab is electrically connected to the common cathode (Pin 2) and is not isolated. It must be mounted to a heatsink with appropriate insulating hardware (e.g., mica washer + thermal grease) if the heatsink is grounded or at a different potential than the cathode net.
SDT30A120CT 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:
- 860 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
SDT30A120CT FAQ
1.How can I place an order for SDT30A120CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SDT30A120CT 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 SDT30A120CT reliable?
The price and inventory of SDT30A120CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT30A120CT is usually 5 days.
3.What payment methods are accepted for SDT30A120CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT30A120CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDT30A120CT?
SDT30A120CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDT30A120CT 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 SDT30A120CT?
For technical support, including SDT30A120CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT30A120CT requirements.
6.How does Aetrix verify that SDT30A120CT is sourced from the original manufacturer or authorized distributors?
All SDT30A120CT 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 SDT30A120CT meets industry standards.
7.What is the process for return or replacement of SDT30A120CT?
All SDT30A120CT units undergo pre-shipment inspection (PSI). If there is an issue with SDT30A120CT, 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 SDT30A120CT part is unused and in its original packaging.
Return procedure for SDT30A120CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDT30A120CT 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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onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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