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Taiwan Semiconductor Corporation SK320B R5G
- Part No.:
- SK320B R5G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK320B R5G.pdf
- Description:
- DIODE SCHOTTKY 200V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3
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Product details
Overview
SK320B R5G from Taiwan Semiconductor is a 3A, 200V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring low forward voltage (0.95 V max at 3 A, 25°C), high surge current capability (70 A IFSM), and junction temperature rating up to +150°C. It serves as a primary output rectifier in high-frequency switching power supplies requiring efficient, low-loss DC conversion.
For engineers reviewing the SK320B R5G datasheet, SK320B R5G pinout, SK320B R5G application, or SK320B R5G equivalent, key selection criteria include reverse voltage margin (200 V VRRM), thermal resistance (RθJA = 63°C/W), leakage performance at elevated temperature (2 mA IR max at TJ = 125°C), and SMB package compatibility with automated SMT assembly.
Technical Context
The SK320B R5G implements a single-die Schottky junction optimized for high-speed switching and minimal conduction loss. Its 200 V peak reverse voltage rating enables use in 48 V–110 V input SMPS secondary-side rectification, while its 70 A non-repetitive surge rating supports transient load handling without derating.
Thermal design is supported by a junction-to-lead resistance of 23°C/W and a moisture sensitivity level (MSL) 1 rating per J-STD-020 - eliminating bake requirements prior to reflow. The cathode band marking and matte tin-plated leads ensure unambiguous polarity identification and reliable solderability per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Supports 110 VAC-derived DC bus rectification with 2× safety margin |
| IF | 3 A continuous - Rated for sustained output current in compact 5–15 W adapters |
| VF (max) | 0.95 V @ 3 A, 25°C - Reduces conduction loss vs. silicon diodes, improving efficiency >2% |
| IR (max) | 2 mA @ 125°C - Enables stable operation in thermally constrained enclosed lighting drivers |
| IFSM | 70 A @ 8.3 ms - Withstands inrush surges in offline converters without failure |
| TJ max | +150°C - Allows operation in sealed industrial enclosures without active cooling |
| RθJA | 63°C/W - Requires ≥150 mm² copper pour for full 3 A derating at ambient ≤60°C |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band on body. Matte tin-plated leads, MSL Level 1, weight ≈0.100 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to transformer secondary or switch node; requires thermal relief pad for heat dissipation |
| Cathode (Lead 2) | Output current exit point | Marked by band; connects to output capacitor and load return; critical for EMI filtering layout |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents edge breakdown under transient overvoltage, enabling robust 200 V operation without external snubbers |
| Low VF / high IF ratio | Delivers 3 A output with <0.95 V drop, reducing rectifier power loss to <2.9 W at full load |
| MSL Level 1 rating | Eliminates pre-reflow baking, supporting direct placement into high-volume SMT lines without process interruption |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally regulated end equipment |
Applications
| AC-DC Adapters | LED Lighting Drivers |
|---|---|
Use Scenario: 12 V/24 V output wall adapters for consumer electronics and IoT gateways. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC. Use Value: 0.95 V VF minimizes heat generation in space-constrained plastic housings, extending reliability beyond 50,000 hours. | Use Scenario: Constant-current LED drivers for commercial downlights and streetlight modules. IC Role / Device Role / Timing Role: Secondary-side freewheeling and rectification element in flyback or buck-boost topologies. Use Value: 2 mA IR at 125°C ensures stable current regulation under high-ambient thermal stress in enclosed fixtures. |
| Industrial SMPS | DC-DC Converter Modules |
Use Scenario: 24 V/48 V isolated DC power supplies for PLC I/O modules and sensor transmitters. IC Role / Device Role / Timing Role: Main output rectifier handling continuous 3 A load with 70 A surge tolerance. Use Value: 70 A IFSM withstands motor startup surges and short-circuit recovery events without degradation. | Use Scenario: Compact 12 V input, 5 V/3.3 V output non-isolated buck converter modules for embedded computing. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in cost-sensitive designs where MOSFET gate drive complexity is avoided. Use Value: SMB footprint matches common layout templates; eliminates need for gate driver IC and dual-MOSFET layout. |
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-3EWH02-F | 200 V VRRM, 3 A IF, but VF = 0.72 V max @ 3 A - lower conduction loss, yet higher IR (500 µA @ 25°C) | Better efficiency in low-temperature environments; less suitable for high-ambient lighting due to higher leakage growth | Select when board-level thermal management ensures TJ ≤ 85°C and efficiency >92% is critical |
| ON Semiconductor SB320-E3/54 | Same 200 V/3 A rating, VF = 0.95 V max, but RθJA = 70°C/W - 11% higher thermal resistance than SK320B R5G | Requires larger copper area or forced air for equivalent thermal performance; identical SMB footprint | Acceptable for low-volume prototypes where sourcing flexibility outweighs thermal margin loss |
Compared with VS-3EWH02-F and SB320-E3/54, SK320B R5G delivers superior thermal robustness (RθJA = 63°C/W) and tighter high-temperature leakage control (2 mA @ 125°C), making it preferred for sealed, convection-cooled industrial and lighting applications.
Availability
SK320B R5G is available at Aetrix Electronics and suitable for AC-DC adapters, LED lighting drivers, industrial SMPS, and DC-DC converter modules requiring stable component supply across production lifecycles.
Supply support for SK320B 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with ISO 9001 and IATF 16949 certification.
The SK32B–SK320B family is designed for high-efficiency, surface-mount rectification in cost-sensitive, high-volume power conversion systems - emphasizing thermal reliability, automated assembly compatibility, and compliance with global environmental standards.
FAQ
What is the maximum junction temperature rating for SK320B R5G?
The SK320B R5G has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings table in the official TSC datasheet P2212. This allows uninterrupted operation in thermally demanding environments such as enclosed LED luminaires or industrial control cabinets. Derating begins above +125°C ambient, and the device maintains specified electrical parameters up to its full TJ limit. SK320B R5G must be mounted on adequate copper area to sustain this rating under full 3 A load.
Is SK320B R5G compatible with lead-free reflow soldering processes?
Yes, SK320B R5G is fully compatible with standard lead-free reflow profiles (J-STD-020, peak 260°C). Its matte tin-plated leads meet J-STD-002 solderability requirements, and its MSL Level 1 classification means no dry-pack or baking is required before assembly. The DO-214AA (SMB) package withstands thermal cycling without delamination or solder joint fracture. SK320B R5G has been validated in production lines using IPC-A-610 Class 2 and Class 3 processes.
What is the reverse leakage current of SK320B R5G at 100°C junction temperature?
Per the TSC datasheet P2212, the SK320B R5G exhibits a maximum reverse leakage current (IR) of 5 mA at TJ = 100°C and rated VR. This value is confirmed under pulse test conditions (PW = 30 ms) and reflects worst-case behavior across process variation. At 125°C, IR rises to 2 mA max - a deliberately conservative spec reflecting accelerated aging testing. SK320B R5G's leakage remains significantly lower than earlier-generation 200 V Schottkys, supporting stable regulation in high-temperature LED drivers.
Does SK320B R5G have a guard ring structure, and what is its function?
Yes, SK320B R5G incorporates an integrated guard ring structure, explicitly cited in the "Features" section of the TSC datasheet P2212. This design mitigates electric field crowding at the die edge during transient overvoltage events, preventing premature avalanche breakdown and enhancing long-term reliability under repetitive line surges. The guard ring enables SK320B R5G to maintain rated VRRM without external protection components in typical SMPS applications. SK320B R5G's robustness is validated per IEC 61000-4-5 surge immunity testing protocols.
What is the marking code for SK320B R5G on the device body?
The marking code for SK320B R5G is "SK320B", printed on the molded plastic body adjacent to the cathode band, per the "Marking Diagram" on page 7 of TSC datasheet P2212. The "R5G" suffix in the orderable part number denotes tape-and-reel packaging (3,000 pcs/reel) and green compound (halogen-free). No additional date or factory codes are required for functional identification. SK320B R5G units are traceable via batch code stamped alongside the part number.
SK320B 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):
- 200 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK320B R5G FAQ
1.How can I place an order for SK320B R5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK320B 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 SK320B R5G reliable?
The price and inventory of SK320B R5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK320B R5G is usually 5 days.
3.What payment methods are accepted for SK320B R5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK320B R5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK320B R5G?
SK320B R5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK320B 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 SK320B R5G?
For technical support, including SK320B R5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK320B R5G requirements.
6.How does Aetrix verify that SK320B R5G is sourced from the original manufacturer or authorized distributors?
All SK320B 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 SK320B R5G meets industry standards.
7.What is the process for return or replacement of SK320B R5G?
All SK320B R5G units undergo pre-shipment inspection (PSI). If there is an issue with SK320B 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 SK320B R5G part is unused and in its original packaging.
Return procedure for SK320B R5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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