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Taiwan Semiconductor Corporation SK14B R5G
- Part No.:
- SK14B R5G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK14B R5G.pdf
- Description:
- DIODE SCHOTTKY 40V 1A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,298
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Product details
Overview
SK14B R5G from Taiwan Semiconductor is a 1A, 40V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring 0.50V forward voltage at 1A and 500µA reverse leakage at 25°C, designed for high-efficiency DC/DC conversion in compact power supplies.
For engineers reviewing the SK14B R5G datasheet, SK14B R5G pinout, SK14B R5G application, or SK14B R5G equivalent, key selection criteria include low VF for thermal efficiency, 30A surge rating for transient robustness, DO-214AA mechanical compatibility, and 125°C junction temperature capability in space-constrained SMPS designs.
Technical Context
The SK14B R5G implements a single-die Schottky junction optimized for low forward conduction loss and fast switching recovery, with guard ring structure enhancing overvoltage ruggedness. Its 10,000 V/µs dV/dt rating supports stable operation in high-frequency switching environments.
Thermal performance is defined by 25°C/W junction-to-lead resistance and a maximum junction temperature of 125°C, enabling reliable operation under continuous 1A DC load without forced cooling in SMB footprint layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF | 1 A continuous forward current - supports full-rated output in 5–24V DC/DC converters |
| VRRM | 40 V peak reverse voltage - suitable for 24V input rails with 60% safety margin |
| VF @ 1A, 25°C | 0.50 V - reduces conduction loss to ≤0.5W at full load, minimizing heatsink need |
| IR @ 40V, 25°C | 500 µA - ensures low standby power loss in always-on adapter circuits |
| IFSM (8.3ms) | 30 A non-repetitive surge - withstands inrush currents during cold-start of LED drivers |
| TJ max | 125 °C - enables operation in sealed enclosures up to 85°C ambient with derating |
| RθJL | 25 °C/W - allows direct PCB copper pour thermal path without thermal vias |
Pinout & Package
Package: DO-214AA (SMB), surface-mount plastic case with matte tin-plated leads, cathode indicated by band, weight 0.093g, UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side; requires adequate copper area for thermal dissipation |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to output/load ground or return path; critical for polarity-sensitive layout |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring overvoltage protection | Enhances reliability against line transients in unregulated AC/DC front-ends without added TVS |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow, reducing manufacturing cost and cycle time |
| High surge current capability (30A) | Supports repeated cold-start events in battery-powered lighting systems |
| RoHS and halogen-free compliance | Meets IEC 61249-2-21 and global environmental regulations for consumer and industrial shipments |
| Automated placement compatibility | DO-214AA geometry and lead coplanarity meet J-STD-002 solderability standards |
Applications
| LED Lighting Driver | USB-C Power Adapter |
|---|---|
Use Scenario: Secondary-side rectification in 12–24V constant-current LED drivers operating at 100–500kHz. IC Role / Device Role / Timing Role: Output rectifier replacing conventional PN diodes to reduce conduction loss and improve efficiency. Use Value: 0.50V VF cuts rectifier loss by >40% vs. 0.7V Si diode, enabling >92% system efficiency at 1A load. | Use Scenario: Synchronous rectification in compact 30W USB-C PD adapters with 5–20V output range. IC Role / Device Role / Timing Role: Freewheeling diode in flyback secondary stage, handling discontinuous conduction mode transitions. Use Value: 30A IFSM sustains repeated plug-in surges; DO-214AA footprint fits tight transformer-primary spacing constraints. |
| Industrial 24V DC/DC Converter | Smart Home Power Supply |
Use Scenario: Input rectification in isolated 24V-to-5V/3.3V buck-derived converters for PLC I/O modules. IC Role / Device Role / Timing Role: Bridge or half-wave rectifier in offline auxiliary supply feeding control logic. Use Value: 125°C TJ rating permits operation in 70°C cabinet environments with no derating below 1A. | Use Scenario: Standby power rectification in Wi-Fi/Zigbee gateway power supplies requiring <100mW no-load consumption. IC Role / Device Role / Timing Role: Primary-side rectifier in quasi-resonant flyback supplying 3.3V always-on rail. Use Value: 500µA IR at 25°C minimizes quiescent loss, supporting Energy Star Level VI standby compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS14 (Diotec) | Same 1A/40V rating, VF = 0.55V (max), IR = 500µA (max) at 25°C, DO-214AA package | Slightly higher VF increases conduction loss by ~100mW at 1A; identical thermal and surge specs | Preferred where second-source qualification is required and 0.05V VF penalty is acceptable |
| SB140 (ON Semiconductor) | 1A/40V, VF = 0.55V (typ), IR = 500µA (max) at 25°C, same DO-214AA footprint | Lower dV/dt (5,000 V/µs) limits use in >300kHz designs; otherwise functionally aligned | Valid alternative for lower-frequency (<200kHz) flyback or forward converters |
Compared with SS14 and SB140, the SK14B R5G delivers the lowest typ. VF (0.50V) among 40V 1A Schottkys, yielding superior thermal performance in thermally constrained layouts, while maintaining full compatibility with standard SMB reflow profiles and JEDEC-compliant board assembly.
Availability
SK14B R5G is available at Aetrix Electronics and suitable for LED lighting drivers, USB-C power adapters, and industrial 24V DC/DC converters requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SK14B 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 SK12B–SK115B family was developed specifically for high-reliability, cost-optimized surface-mount rectification in consumer and industrial power supplies, emphasizing low VF, robust surge handling, and automated assembly readiness.
FAQ
What is the maximum junction temperature rating for the SK14B R5G?
The SK14B R5G has a maximum junction temperature (TJ max) of 125°C, verified per absolute maximum ratings in the official TSC datasheet Version M2212. This allows continuous 1A operation in ambient temperatures up to 85°C when mounted on standard 1-inch² 1oz copper with minimal thermal relief. Exceeding 125°C risks irreversible parametric shift and premature failure of the SK14B R5G.
Does the SK14B R5G have a specified moisture sensitivity level (MSL)?
Yes, the SK14B R5G is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to reflow soldering. This eliminates pre-conditioning steps in high-volume SMT lines and ensures consistent solder joint integrity for the SK14B R5G during standard Pb-free reflow profiles.
What is the forward voltage of the SK14B R5G at 1A and 100°C junction temperature?
The SK14B R5G forward voltage increases with temperature: while VF is 0.50V (typ) at 25°C and 1A, the datasheet does not specify VF at 100°C. However, typical Schottky behavior shows ~10–15% VF reduction at elevated temperature; actual measurement at 100°C would be required for precise design. The SK14B R5G remains fully functional within its 125°C TJ limit.
Is the SK14B R5G halogen-free and RoHS compliant?
Yes, the SK14B R5G meets both RoHS Directive 2011/65/EU and IEC 61249-2-21 halogen-free requirements, confirmed in the "Features" section of the TSC datasheet. The molding compound contains no brominated flame retardants or chlorine-based additives, making the SK14B R5G suitable for environmentally regulated markets including EU, Japan, and China.
What packaging format is used for the SK14B R5G?
The SK14B R5G is supplied in tape-and-reel packaging: 3,000 units per reel, compatible with standard pick-and-place equipment. The DO-214AA (SMB) body dimensions and lead coplanarity comply with J-STD-002, ensuring reliable automated placement. Reel specifications follow EIA-481-D standards, and the SK14B R5G marking code appears as "SK14B" on the cathode band.
SK14B 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):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SK14B R5G FAQ
1.How can I place an order for SK14B R5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK14B 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 SK14B R5G reliable?
The price and inventory of SK14B R5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK14B R5G is usually 5 days.
3.What payment methods are accepted for SK14B R5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK14B R5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK14B R5G?
SK14B R5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK14B 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 SK14B R5G?
For technical support, including SK14B R5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK14B R5G requirements.
6.How does Aetrix verify that SK14B R5G is sourced from the original manufacturer or authorized distributors?
All SK14B 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 SK14B R5G meets industry standards.
7.What is the process for return or replacement of SK14B R5G?
All SK14B R5G units undergo pre-shipment inspection (PSI). If there is an issue with SK14B 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 SK14B R5G part is unused and in its original packaging.
Return procedure for SK14B R5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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