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Taiwan Semiconductor Corporation SK15B R5G
- Part No.:
- SK15B R5G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK15B R5G.pdf
- Description:
- DIODE SCHOTTKY 50V 1A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,657
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Product details
Overview
SK15B R5G from Taiwan Semiconductor is a 1A, 50V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring 0.75V forward voltage at 1A and 5 mA reverse leakage at 100°C. It delivers high surge current capability (30A IFSM), junction temperature up to +150°C, and is optimized for switching-mode power supplies and DC-DC converters.
For engineers reviewing the SK15B R5G datasheet, SK15B R5G pinout, SK15B R5G application, or SK15B R5G equivalent, key selection considerations include its 50V VRRM rating, thermal resistance of 25°C/W, RoHS/halogen-free compliance, and cathode-band polarity marking for reliable board-level integration.
Technical Context
The SK15B R5G implements a single-die Schottky junction with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its construction supports moisture sensitivity level 1 per J-STD-020 and meets JESD 201 Class 2 whisker resistance.
Designed for high-frequency rectification, it exhibits low forward voltage drop and fast recovery characteristics-critical for efficiency in compact, thermally constrained SMPS and adapter designs operating up to 150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating range in buck/boost converter output stages |
| IF | 1 A - Continuous forward current rating; determines minimum trace width and thermal pad sizing in PCB layout |
| VF @ 1A, 25°C | 0.75 V - Low conduction loss enabling >90% efficiency in 5–12 V output rails |
| IR @ 50V, 100°C | 5 mA - Reverse leakage at elevated temperature; impacts standby power in always-on systems |
| IFSM (8.3 ms) | 30 A - Surge withstand capability; protects against inrush during cold-start or line transients |
| RθJL | 25 °C/W - Junction-to-lead thermal resistance; enables direct thermal coupling to copper pour without heatsink |
| TJ max | +150 °C - Extended junction temperature rating allows operation in sealed enclosures or high-ambient environments |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode indicated by band. Weight: 0.093 g. Molding compound rated UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to unregulated input rail (e.g., transformer secondary or switch-node); requires adequate copper area for thermal dissipation |
| Cathode | Output current exit point | Marked by band; ties to output filter capacitor and load; polarity reversal causes catastrophic failure |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against transient overvoltage events without derating VRRM |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; supports standard SMT assembly lines |
| Matte tin plating | Ensures consistent wetting and void-free solder joints per J-STD-002 |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU directives for environmentally regulated end equipment |
Applications
| AC-DC Adapters | LED Driver Secondary Rectification |
|---|---|
Use Scenario: 12 V/1 A wall adapter for IoT sensors with space-constrained PCB layout. IC Role / Device Role / Timing Role: Output rectifier in flyback secondary stage, replacing slower PN diodes. Use Value: 0.75 V VF reduces conduction loss by ~40% vs. 1N5819, improving light-load efficiency and easing thermal management. | Use Scenario: Constant-current LED driver powering 3–5 white LEDs in commercial downlights. IC Role / Device Role / Timing Role: Freewheeling diode in buck-derived constant-current topology. Use Value: 30 A IFSM handles LED string turn-on surges; 150°C TJ rating sustains reliability in enclosed thermal environments. |
| USB-C PD Power Delivery Modules | Industrial DC-DC Converter Outputs |
Use Scenario: 20 V/3.25 A USB-C PD 65 W adapter secondary side. IC Role / Device Role / Timing Role: Synchronous rectifier companion or standalone output rectifier in quasi-resonant flyback. Use Value: Low VF and fast switching minimize output ripple and improve cross-regulation across multiple outputs. | Use Scenario: 24 V industrial PLC power module with 1 A auxiliary bias supply. IC Role / Device Role / Timing Role: Primary output rectifier in isolated forward converter. Use Value: UL 94V-0 package and 25°C/W RθJL support long-term operation under continuous 60°C ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS15H | Same DO-214AA package, 50 V VRRM, but VF = 0.52 V @ 1A (25°C); lower IR (100 µA @ 25°C) | Better efficiency at light loads; tighter IR spec suits battery-powered standby circuits | Select SS15H when lowest possible standby leakage is critical and layout allows same SMB footprint |
| SB150 | DO-214AA, 50 V VRRM, VF = 0.85 V @ 1A (25°C); higher IR (500 µA @ 25°C) | Higher conduction loss increases thermal stress in high-duty-cycle converters | Choose SB150 only if cost sensitivity outweighs efficiency and thermal margin requirements |
Compared with SS15H and SB150, the SK15B R5G offers balanced performance: lower VF than SB150 for improved full-load efficiency, and higher temperature-rated IR stability than SS15H-making it optimal for industrial adapters requiring robustness across -40°C to +85°C ambient.
Availability
SK15B R5G is available at Aetrix Electronics and suitable for AC-DC adapters, LED drivers, USB-C PD modules, and industrial DC-DC converters requiring stable component supply, RoHS compliance, and extended temperature operation.
Supply support for SK15B R5G 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 management and industrial markets since 1979.
The SK1xB series targets cost-sensitive, high-volume power conversion applications where reliability, thermal robustness, and JEDEC-standard packaging are essential-especially in consumer adapters, lighting, and embedded power supplies.
FAQ
What is the maximum junction temperature rating for the SK15B R5G?
The SK15B R5G has a maximum junction temperature (TJ max) of +150°C, confirmed in the Absolute Maximum Ratings table. This rating enables reliable operation in enclosed or high-ambient-temperature environments such as sealed LED drivers or industrial power modules. The SK15B R5G maintains specified electrical performance up to this limit when thermal design adheres to the 25°C/W RθJL specification.
Does the SK15B R5G have a cathode marking, and how is polarity identified?
Yes, the SK15B R5G uses a cathode band for polarity identification, as stated in the Mechanical Data section. The band is located on the molded plastic body and aligns with the cathode terminal. This marking is consistent across all SK1xB family devices and must be oriented toward the positive output node during PCB placement. The SK15B R5G's polarity is non-reversible-reverse bias beyond VRRM risks immediate failure.
Is the SK15B R5G suitable for use in RoHS-compliant and halogen-free designs?
Yes, the SK15B R5G is explicitly certified RoHS compliant and halogen-free per IEC 61249-2-21, as documented in the FEATURES section. Its matte tin-plated leads and UL 94V-0 molding compound meet environmental and safety standards required for CE-marked consumer electronics and industrial equipment. The SK15B R5G's compliance documentation is maintained by Taiwan Semiconductor and verified through third-party material declarations.
What is the forward voltage of the SK15B R5G at 1 A and 100°C junction temperature?
The forward voltage (VF) of the SK15B R5G is not specified at 100°C in the Electrical Specifications table; only VF at 25°C (0.75 V) is provided. However, the Forward Characteristics curves (Fig.8) show VF increases to approximately 0.65 V at 100°C and 1 A. This temperature-dependent behavior is typical for Schottky diodes and must be accounted for in thermal design. The SK15B R5G's VF drift remains within predictable bounds across its full operating range.
Can the SK15B R5G replace the SK14B in an existing design?
Yes, the SK15B R5G can directly replace the SK14B because both share identical DO-214AA (SMB) package, pinout, and thermal characteristics-but with higher VRRM (50 V vs. 40 V). The SK15B R5G's 0.75 V VF matches SK14B's spec, and both are rated for 150°C TJ. No PCB changes are needed; the upgrade improves reverse voltage margin in applications exposed to line transients or ringing, such as offline flyback converters.
SK15B R5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 750 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK15B R5G FAQ
1.How can I place an order for SK15B R5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK15B R5G 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 SK15B R5G reliable?
The price and inventory of SK15B R5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK15B R5G is usually 5 days.
3.What payment methods are accepted for SK15B R5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK15B R5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK15B R5G?
SK15B R5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK15B R5G 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 SK15B R5G?
For technical support, including SK15B R5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK15B R5G requirements.
6.How does Aetrix verify that SK15B R5G is sourced from the original manufacturer or authorized distributors?
All SK15B R5G 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 SK15B R5G meets industry standards.
7.What is the process for return or replacement of SK15B R5G?
All SK15B R5G units undergo pre-shipment inspection (PSI). If there is an issue with SK15B R5G, 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 SK15B R5G part is unused and in its original packaging.
Return procedure for SK15B R5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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