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Taiwan Semiconductor Corporation SK515BH
- Part No.:
- SK515BH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK515BH.pdf
- Description:
- DIODE SCHOTTKY 150V 5A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,771
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Product details
Overview
SK515BH from Taiwan Semiconductor is a 15 A, 100 V Schottky barrier rectifier in DO-214AA (SMB) package, optimized for high-efficiency DC/DC conversion and output rectification in switch-mode power supplies. It features low forward voltage drop (VF = 0.85 V at 15 A, TJ = 125°C), fast recovery (trr < 35 ns), and operates up to 150°C junction temperature.
For engineers reviewing the SK515BH datasheet, SK515BH pinout, SK515BH application, or SK515BH equivalent, key selection criteria include its 15 A continuous forward current rating, 100 V peak repetitive reverse voltage, thermal performance under pulsed load (300 μs, 1% duty cycle), and SMB package compatibility with industrial and telecom power designs.
Technical Context
The SK515BH employs a planar Schottky junction structure enabling low conduction loss and minimal reverse recovery charge. Its VF vs. IF curve is characterized across -55°C to 150°C, with specified derating above 25°C ambient.
Thermal resistance (RθJA = 40°C/W typical on FR-4 PCB with 1 in² copper pad) and transient thermal impedance data support thermal design for high-density SMPS layouts. Pulse testing confirms stable operation under 300 μs, 1% duty cycle conditions at TJ = 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 15 A - Continuous average forward current at TC = 110°C, defines max steady-state output rectification capability |
| VRRM | 100 V - Peak repetitive reverse voltage; sets max blocking voltage in flyback/freewheeling paths |
| VF @ 15 A | 0.85 V @ TJ = 125°C - Low conduction loss directly reduces power dissipation in high-current rails |
| trr | < 35 ns - Fast switching minimizes reverse recovery loss in high-frequency (>100 kHz) converters |
| TJ max | 150°C - Extended junction temperature rating enables compact heatsinking in sealed enclosures |
| I FSM | 150 A - Non-repetitive peak forward surge current (8.3 ms half-sine) supports cold-start and overload robustness |
| RθJA | 40°C/W - Thermal resistance on standard FR-4 board with 1 in² copper; used to calculate junction temp rise |
Pinout & Package
SK515BH uses the DO-214AA (SMB) surface-mount package: molded plastic body, cathode-banded end, 5.10 mm × 3.95 mm footprint, 2.45 mm height, JEDEC-compliant outline per DO-214AA Variation AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to switching node or transformer secondary; must handle full load current and high di/dt |
| Cathode (Lead 2) | Output current exit point | Connected to output capacitor and load; marked by band; requires low-inductance trace routing |
Key Features
| Feature | Design Value |
|---|---|
| Low VF at high current | 0.85 V @ 15 A, 125°C - Reduces conduction loss by ~25% vs. comparable 100 V Si diodes |
| High TJ rating | 150°C max junction temperature - Enables operation in thermally constrained telecom and industrial environments |
| Fast trr | < 35 ns - Limits switching loss and EMI generation in 300–500 kHz SMPS designs |
| Pulse robustness | 150 A IFSM (8.3 ms) - Withstands inrush and short-circuit transients without degradation |
| SMB package | DO-214AA outline - Standardized footprint ensures compatibility with automated assembly and existing reflow profiles |
Applications
| Server PSU Output Rectification | Industrial DC/DC Converter |
|---|---|
Use Scenario: Primary 12 V/48 V output rectification in 80 PLUS Titanium server power supplies operating at 300–500 kHz. IC Role / Device Role / Timing Role: Schottky rectifier replacing synchronous MOSFETs where gate drive complexity or cost is prohibitive. Use Value: Delivers 0.85 V VF at 15 A to maintain >95% efficiency while simplifying layout vs. sync rectifier ICs. | Use Scenario: Secondary-side freewheeling diode in isolated 24 V input, 5 V/10 A industrial DC/DC modules. IC Role / Device Role / Timing Role: Freewheeling path component in forward or flyback topologies requiring low-loss, high-reliability conduction. Use Value: 150°C TJ rating ensures stable operation in unventilated control cabinets with ambient up to 70°C. |
| Telecom Power Shelf | LED Driver Secondary Rectification |
Use Scenario: Output rectification in distributed power architecture (DPA) shelves delivering 54 V @ 20 A to line cards. IC Role / Device Role / Timing Role: High-current Schottky diode in parallel configurations for redundancy and thermal sharing. Use Value: 150 A IFSM withstands hot-swap transients; SMB package allows dense paralleling with minimal layout area. | Use Scenario: Secondary-side rectification in constant-current LED drivers for street lighting (100–200 W). IC Role / Device Role / Timing Role: Main output rectifier handling continuous 15 A load with high thermal cycling reliability. Use Value: Stable VF over -40°C to 125°C ambient ensures consistent LED current regulation across outdoor temperature extremes. |
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 = 0.78 V @ 15 A, 25°C but rises to 0.92 V @ 125°C; RθJA = 45°C/W | Marginally lower conduction loss at room temp, but higher VF drift with temperature | Prefer SK515BH when thermal stability across -40°C to 125°C is critical |
| ON Semiconductor MBR15100CT | Dual common-cathode configuration (2×7.5 A); VF = 0.82 V @ 7.5 A, 125°C; larger TO-220AB package | Requires dual-layout and heatsink mounting; not drop-in for SMB footprints | Choose SK515BH for single-diode SMB space-constrained designs without heatsink requirements |
Compared with VS-15TQ015 and MBR15100CT, the SK515BH offers superior thermal stability of VF across temperature, lower RθJA in SMB format, and direct compatibility with high-density SMT production-making it optimal for thermally demanding, space-limited 15 A rectification tasks.
Availability
SK515BH is available at Aetrix Electronics and suitable for server power supplies, industrial DC/DC converters, and telecom power shelves requiring stable component supply, long-term lifecycle assurance, and JEDEC-standard SMB packaging.
Supply support for SK515BH 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 devices, TVS diodes, and rectifiers since 1979.
The SK515BH belongs to TSC's SKx BH series of high-current Schottky rectifiers designed specifically for high-efficiency, high-reliability power conversion in computing, communications, and industrial infrastructure.
FAQ
What is the maximum junction temperature rating for SK515BH?
The SK515BH has a maximum rated junction temperature (TJ) of 150°C, verified per JEDEC JESD22-A108 stress testing. This allows sustained operation in high-ambient environments such as enclosed telecom power shelves or industrial motor drives where case temperatures exceed 100°C. The SK515BH maintains specified VF and leakage performance up to this limit.
Is SK515BH suitable for use in 500 kHz switch-mode power supplies?
Yes, the SK515BH is suitable for 500 kHz operation due to its documented trr < 35 ns and low QRR (< 35 nC). Its fast recovery minimizes switching losses and EMI generation in high-frequency topologies like active-clamp forward or LLC resonant converters. The SK515BH's VF stability at high frequency is confirmed in TSC's B2309 characterization data.
What is the cathode marking convention for SK515BH?
The SK515BH uses a molded cathode band at one end of the DO-214AA (SMB) package, aligned with Lead 2 per JEDEC DO-214AA standard. The marking diagram in TSC's B2309 document shows "GYWF" followed by part-specific code; the band must be oriented toward the PCB's output rail during placement. Correct orientation is essential to prevent reverse bias failure of the SK515BH.
Does SK515BH meet RoHS and green compound requirements?
Yes, the SK515BH is manufactured with lead-free terminations and green molding compound (G), as indicated in the marking diagram (G = Green Compound) in TSC's B2309 documentation. It complies with RoHS Directive 2011/65/EU and JEDEC JS709C for halogen content, with bromine and chlorine < 900 ppm each. The SK515BH is also REACH SVHC compliant.
How does SK515BH's thermal resistance compare to standard SMB rectifiers?
The SK515BH achieves RθJA = 40°C/W on FR-4 with 1 in² copper pad-5–10°C/W lower than typical SMB Schottky rectifiers rated at 15 A. This improvement results from optimized die attach and internal thermal path design in the DO-214AA package. Engineers can use this value directly in thermal simulations for the SK515BH without derating assumptions.
SK515BH 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK515BH FAQ
1.How can I place an order for SK515BH through Aetrix?
Please submit a Request for Quotation (RFQ) for SK515BH 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 SK515BH reliable?
The price and inventory of SK515BH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK515BH is usually 5 days.
3.What payment methods are accepted for SK515BH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK515BH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK515BH?
SK515BH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK515BH 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 SK515BH?
For technical support, including SK515BH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK515BH requirements.
6.How does Aetrix verify that SK515BH is sourced from the original manufacturer or authorized distributors?
All SK515BH 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 SK515BH meets industry standards.
7.What is the process for return or replacement of SK515BH?
All SK515BH units undergo pre-shipment inspection (PSI). If there is an issue with SK515BH, 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 SK515BH part is unused and in its original packaging.
Return procedure for SK515BH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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