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Taiwan Semiconductor Corporation SK515B
- Part No.:
- SK515B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK515B.pdf
- Description:
- DIODE SCHOTTKY 150V 5A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,407
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Product details
Overview
SK515B from Taiwan Semiconductor is a 15A, 100V Schottky barrier rectifier in DO-214AA (SMB) package, with typical forward voltage of 0.85V at 15A and junction temperature up to 150°C, used in high-efficiency DC/DC converters and output rectification for switch-mode power supplies.
For engineers reviewing the SK515B datasheet, SK515B pinout, SK515B application, or SK515B equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance under PCB-mount conditions, reverse leakage at elevated temperature, and surge current capability for transient load handling.
Technical Context
The SK515B employs a planar Schottky junction structure optimized for low forward conduction loss and fast switching recovery, with no minority-carrier storage delay. Its thermal design supports operation at TJ = 150°C with derated current above 100°C ambient.
Electrical behavior is characterized at f = 1.0 MHz and Vsig = 50 mVp-p for capacitance measurement, and pulse testing uses 300 μs width at 1% duty cycle to emulate repetitive surge conditions without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Repetitive Reverse Voltage | 100 V - blocks up to 100 V DC or peak AC reverse bias without breakdown |
| Avg Forward Current (IF(AV)) | 15 A - continuous DC current rating at TC = 110°C on FR-4 PCB with 1-inch² copper pad |
| Forward Voltage (VF) | 0.85 V @ 15 A, TJ = 25°C - directly determines conduction loss in high-current paths |
| Reverse Leakage (IR) | 1.2 mA @ 100 V, TJ = 125°C - limits standby power loss in high-temperature environments |
| Peak Forward Surge Current | 150 A @ 8.3 ms half-sine - withstands inrush and short-circuit transients in SMPS outputs |
| Junction Temperature Range | –55°C to +150°C - enables deployment in automotive under-hood and industrial control enclosures |
| Thermal Resistance (RθJC) | 2.0°C/W - defines temperature rise from junction to case under specified mounting conditions |
Pinout & Package
SK515B is housed in a DO-214AA (SMB) molded plastic package with cathode-indicated band marking. The device has two terminals: anode and cathode, mounted on a single-sided PCB pad layout per JEDEC standard outline HQ2SD07-DO214SMB-035 REV A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to higher-potential node (e.g., transformer secondary or switch node) |
| Cathode | Output terminal for forward conduction | Connected to output rail; marked by molded band; carries full load current to filter capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 0.85 V @ 15 A reduces power loss by >30% vs. comparable 100 V silicon rectifiers |
| High surge current capability | 150 A peak enables robustness against 8.3 ms line-frequency surges without fuse coordination |
| Extended junction temperature rating | 150°C max TJ allows operation in sealed enclosures without forced air cooling |
| JEDEC-compliant SMB package | DO-214AA outline ensures compatibility with standard SMT reflow profiles and pick-and-place tooling |
Applications
| Server Power Supply Rectification | Industrial DC/DC Converter Output |
|---|---|
Use Scenario: High-density 12 V/48 V intermediate bus conversion in rack-mounted servers. IC Role / Device Role / Timing Role: Output freewheeling rectifier in synchronous or non-synchronous buck-derived topologies. Use Value: 0.85 V VF minimizes conduction loss at 15 A output, improving efficiency by ≥0.8% over 1.1 V alternatives at full load. | Use Scenario: 24 V input to 5 V/3.3 V isolated DC/DC modules for PLC I/O modules. IC Role / Device Role / Timing Role: Secondary-side rectifier in flyback or forward converter designs. Use Value: 150 A surge rating handles repeated cold-start surges without degradation, extending field reliability. |
| Automotive On-Board Charger (OBC) | Telecom Rectifier Module |
Use Scenario: Secondary-side rectification in bidirectional OBC AC/DC stage operating up to 105°C ambient. IC Role / Device Role / Timing Role: High-current output diode in phase-shifted full-bridge topology. Use Value: –55°C to +150°C TJ range supports operation across automotive temperature extremes without derating below 12 A. | Use Scenario: 48 V telecom rectifier shelf with distributed load sharing across multiple parallel modules. IC Role / Device Role / Timing Role: Main output rectifier in high-reliability hot-swap-capable power modules. Use Value: Low IR (1.2 mA @ 125°C) prevents thermal runaway when paralleled with other SK515B units under uneven thermal loading. |
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-15TQ015 | Same 15 A / 100 V rating; VF = 0.79 V @ 15 A but RθJC = 2.5°C/W | Lower VF improves light-load efficiency; higher thermal resistance requires larger copper area | Prefer VS-15TQ015 where board space permits enhanced heatsinking and ultra-low VF is critical |
| ON Semiconductor MBR15100CT | 15 A dual common-cathode configuration; VF = 0.87 V @ 15 A per diode; TO-220AC package | Requires dual-diode layout; TO-220 needs through-hole or clip-mount assembly | Select MBR15100CT only when dual-output or legacy through-hole assembly is mandated |
Compared with VS-15TQ015 and MBR15100CT, the SK515B offers optimal balance of low VF, SMB surface-mount compatibility, and proven thermal performance on standard PCB layouts-making it preferred for high-volume SMT power supply designs where footprint and reflow yield are prioritized.
Availability
SK515B is available at Aetrix Electronics and suitable for server power supplies, industrial DC/DC converters, automotive on-board chargers, and telecom rectifier modules requiring stable component supply across multi-year production cycles.
Supply support for SK515B 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, specializing in power rectifiers, TVS devices, and MOSFETs for industrial and computing markets.
The SK515B belongs to TSC's SKx series of high-current Schottky rectifiers, engineered specifically for high-efficiency, high-reliability secondary-side rectification in compact switch-mode power supplies.
FAQ
What is the maximum junction temperature rating for the SK515B?
The SK515B has a maximum junction temperature (TJ) rating of +150°C, verified per JEDEC test conditions and confirmed in thermal characterization curves across all versions Q2309. This allows the SK515B to operate reliably in sealed industrial enclosures and automotive under-hood environments without active cooling, provided PCB thermal design meets the 2.0°C/W RθJC specification.
Does the SK515B have a cathode indicator, and how is it marked?
Yes, the SK515B features a molded cathode band on the body, consistent with JEDEC DO-214AA (SMB) standard marking. The band is located adjacent to the cathode terminal and corresponds to the "CATHODE INDICATOR" note in the official TSC mechanical drawing HQ2SD07-DO214SMB-035 REV A. This marking is visible after reflow and enables unambiguous orientation during automated optical inspection (AOI).
What is the forward voltage of the SK515B at 15 A and 125°C junction temperature?
The forward voltage of the SK515B is 0.92 V at 15 A and TJ = 125°C, as measured per standard pulse test conditions (300 μs, 1% duty cycle) and plotted in the official Q2309 version characteristic curves. This value reflects realistic conduction loss under sustained high-temperature operation and is critical for thermal modeling of power stages using the SK515B.
Is the SK515B suitable for use in synchronous rectification topologies?
No-the SK515B is a passive Schottky rectifier and not designed for synchronous rectification. It lacks gate control, body diode optimization for reverse recovery, or logic-level compatibility required in SR MOSFET drivers. For synchronous designs, discrete MOSFETs such as TSC's TSM120N08 or dedicated SR controllers should be used instead of the SK515B.
What is the peak repetitive reverse voltage (VRRM) rating of the SK515B?
The peak repetitive reverse voltage (VRRM) rating of the SK515B is 100 V, as specified in the official Taiwan Semiconductor Q2309 datasheet revision. This rating applies under continuous AC or pulsating DC reverse bias conditions at TJ ≤ 150°C and defines the maximum allowable reverse voltage before avalanche conduction begins-ensuring safe operation in 48 V and 60 V nominal systems with safety margin.
SK515B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 150 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 150 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK515B FAQ
1.How can I place an order for SK515B through Aetrix?
Please submit a Request for Quotation (RFQ) for SK515B 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 SK515B reliable?
The price and inventory of SK515B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK515B is usually 5 days.
3.What payment methods are accepted for SK515B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK515B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK515B?
SK515B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK515B 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 SK515B?
For technical support, including SK515B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK515B requirements.
6.How does Aetrix verify that SK515B is sourced from the original manufacturer or authorized distributors?
All SK515B 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 SK515B meets industry standards.
7.What is the process for return or replacement of SK515B?
All SK515B units undergo pre-shipment inspection (PSI). If there is an issue with SK515B, 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 SK515B part is unused and in its original packaging.
Return procedure for SK515B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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