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Taiwan Semiconductor Corporation SK53C
- Part No.:
- SK53C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK53C.pdf
- Description:
- DIODE SCHOTTKY 30V 5A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,958
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Product details
Overview
SK53C from Taiwan Semiconductor is a 5A, 30V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, designed for high-efficiency DC/DC conversion with low forward voltage (0.55 V at 5 A, 25°C), high surge capability (120 A), and junction temperature up to 150°C. It serves as primary output rectifier in compact AC/DC adapters and offline SMPS.
For engineers reviewing the SK53C datasheet, SK53C pinout, SK53C application, or SK53C equivalent, key selection criteria include its 30 V repetitive peak reverse voltage, 0.55 V forward drop at rated current, 13°C/W junction-to-lead thermal resistance, and DO-214AB mechanical compatibility with automated SMT placement.
Technical Context
The SK53C employs a single-die Schottky structure optimized for low conduction loss in medium-voltage switching applications. Its guard ring design enhances overvoltage robustness, while JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity support reliable reflow assembly.
Thermal performance is characterized with RθJL = 13°C/W on a 16 mm × 16 mm Cu pad PCB - enabling sustained 5 A operation without forced cooling. The device operates across -55°C to +150°C junction range and maintains <0.5 mA reverse leakage at 25°C and rated 30 V VR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or forward converter secondary side |
| IF | 5 A continuous - Rated average forward current; supports 25 W–30 W output stages at typical efficiency targets |
| VF @ 5 A, 25°C | 0.55 V - Low conduction loss reduces power dissipation to ~2.75 W, easing thermal management |
| IFSM | 120 A - Peak non-repetitive surge rating; withstands inrush and transient overload in adapter startup |
| RθJL | 13 °C/W - Junction-to-lead thermal resistance; enables direct heat transfer to PCB copper, critical for compact layouts |
| TJ max | 150 °C - Maximum junction temperature; allows operation in sealed enclosures with limited airflow |
| IR @ 30 V, 25°C | ≤0.5 mA - Low reverse leakage preserves efficiency in high-impedance feedback paths and standby modes |
Pinout & Package
Package: DO-214AB (SMC) - Surface-mount plastic case with matte tin-plated leads, 16 mm × 16 mm thermal pad requirement, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to transformer secondary or switch node; carries full load current during on-state |
| Cathode | Output terminal for forward conduction | Connected to output capacitor and load; polarity marking ensures correct orientation in layout |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Improves ruggedness against transient overvoltage events without derating VRRM |
| Low VF (0.55 V) | Reduces conduction loss by >30% vs. comparable 30 V Si diodes, directly improving system efficiency |
| J-STD-020 Level 1 MSL | Enables standard reflow profile use without baking; eliminates pre-conditioning overhead in production |
| RoHS & halogen-free | Meets IPC-1752A material declaration requirements for global commercial and industrial shipments |
| 120 A IFSM | Supports 10× rated current surges, accommodating worst-case inrush in universal-input 90–264 VAC adapters |
Applications
| AC/DC Adapters | LED Drivers |
|---|---|
Use Scenario: Universal-input 12 V/24 V wall adapters powering consumer electronics. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback topology. Use Value: 0.55 V forward drop minimizes heat generation in space-constrained plastic housings. |
Use Scenario: Constant-current LED drivers for commercial downlights and street lighting. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in buck-derived topologies. Use Value: 150°C max junction temperature enables operation in thermally dense LED modules. |
| PC Power Supplies | Industrial SMPS |
Use Scenario: +5 V and +3.3 V rail rectification in ATX PSUs with active clamp forward designs. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in cost-sensitive mid-power tiers. Use Value: DO-214AB footprint allows drop-in upgrade from legacy Si diodes without layout change. |
Use Scenario: DIN-rail mounted 24 V/48 V industrial power supplies for PLC and sensor interfaces. IC Role / Device Role / Timing Role: Main output rectifier in ruggedized open-frame converters. Use Value: 13°C/W RθJL enables stable 5 A operation on minimal copper area, reducing board cost. |
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-50WQ03FNTR-M3 | Same 30 V VRRM, 5 A IF, but VF = 0.49 V (typ) at 5 A; TO-277 package (smaller footprint, no leadframe) | Better efficiency at light loads; requires revised stencil and pick-and-place setup due to different land pattern | Select when optimizing for ultra-low VF and board space; verify thermal interface with smaller pad area |
| ON Semiconductor SB530-E3/54 | 30 V VRRM, 5 A IF, VF = 0.52 V (max); DO-214AA (SMB) package - 1.5 mm shorter body than DO-214AB | Lower surge rating (100 A vs. 120 A); suitable for non-critical surge environments | Choose for SMB-compatible designs where existing layout uses SMB footprint and surge margin is relaxed |
Compared with VS-50WQ03FNTR-M3 and SB530-E3/54, the SK53C offers balanced trade-offs: higher surge tolerance than SMB alternatives, lower VF than many DO-214AB competitors, and full J-STD-020 Level 1 compliance without requiring special handling.
Availability
SK53C is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and industrial SMPS requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for SK53C 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power electronics markets since 1979.
The SK53C belongs to TSC's SK5xC Schottky rectifier family, engineered specifically for high-volume, cost-sensitive switching power supplies where efficiency, reliability, and SMT manufacturability are jointly prioritized.
FAQ
What is the maximum junction temperature rating for the SK53C?
The SK53C has a maximum junction temperature (TJ) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet Version S2311. This rating allows the SK53C to operate reliably in enclosed, convection-cooled environments such as sealed AC/DC adapters and LED driver housings without active cooling.
Does the SK53C have a specified forward voltage at elevated temperature?
Yes - the SK53C forward voltage is characterized at 25°C, 100°C, and 125°C. At 5 A and 100°C, VF remains ≤0.62 V (typical curve extrapolation from SK52C–SK54C group data). This ensures predictable conduction loss across the full industrial temperature range, supporting thermal design of the SK53C in real-world applications.
Is the SK53C pin-compatible with other devices in the SK5xC series?
Yes - all SK5xC variants (SK52C through SK520C) share identical DO-214AB (SMC) packaging, anode/cathode pinout, and mechanical dimensions. Engineers may substitute SK53C for SK52C or SK54C in existing layouts without PCB revision, provided voltage and thermal requirements remain within spec.
What is the reverse leakage current specification for the SK53C at 125°C?
Per the Electrical Specifications table in the SK52C–SK520C datasheet (Version S2311), the SK53C exhibits ≤10 mA reverse current (IR) at 30 V reverse bias and TJ = 125°C. This value is confirmed for the SK52C–SK56C subgroup and applies directly to the SK53C, ensuring stable performance in high-temperature LED and industrial power applications.
How does the SK53C's thermal resistance compare to standard DO-214AB rectifiers?
The SK53C specifies RθJL = 13°C/W and RθJA = 53°C/W when mounted on a 16 mm × 16 mm Cu pad - matching or exceeding industry benchmarks for DO-214AB Schottky rectifiers. This enables the SK53C to sustain full 5 A current with ≤65°C temperature rise above ambient, simplifying thermal design versus higher-Rθ alternatives.
SK53C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 30 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK53C FAQ
1.How can I place an order for SK53C through Aetrix?
Please submit a Request for Quotation (RFQ) for SK53C 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 SK53C reliable?
The price and inventory of SK53C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK53C is usually 5 days.
3.What payment methods are accepted for SK53C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK53C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK53C?
SK53C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK53C 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 SK53C?
For technical support, including SK53C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK53C requirements.
6.How does Aetrix verify that SK53C is sourced from the original manufacturer or authorized distributors?
All SK53C 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 SK53C meets industry standards.
7.What is the process for return or replacement of SK53C?
All SK53C units undergo pre-shipment inspection (PSI). If there is an issue with SK53C, 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 SK53C part is unused and in its original packaging.
Return procedure for SK53C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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