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Taiwan Semiconductor Corporation SK56B
- Part No.:
- SK56B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK56B.pdf
- Description:
- DIODE SCHOTTKY 60V 5A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:44
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Product details
Overview
SK56B from Taiwan Semiconductor is a 60 V, 5 A surface-mount Schottky barrier rectifier in DO-214AA (SMB) package, featuring low forward voltage drop (VF = 0.72 V at 5 A, TJ = 125°C), fast recovery (trr < 35 ns), and operating junction temperature up to 150°C - used in DC/DC converters and switch-mode power supplies.
For engineers reviewing the SK56B datasheet, SK56B pinout, SK56B application, or SK56B equivalent, key selection criteria include forward voltage at rated current, thermal derating curves, surge current capability (IFSM = 150 A), and SMB package compatibility with automated assembly processes.
Technical Context
The SK56B belongs to the SK52B–SK515B family of planar Schottky rectifiers optimized for high-efficiency, medium-power switching applications. It uses a platinum-silicide (PtSi) Schottky junction on n-type silicon, enabling low VF and minimal reverse recovery charge (QRR).
Its thermal performance is characterized across TJ = −55°C to +150°C, with VF decreasing as temperature rises and IFSM defined under 8.3 ms half-sine surge conditions. The device exhibits no minority-carrier storage, eliminating reverse recovery tail current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Reverse Voltage (VRRM) | 60 V - supports input rails up to 48 V nominal systems with safety margin. |
| Max Average Forward Current (IF(AV)) | 5 A at TC = 110°C - requires heatsinking or PCB copper area for sustained operation. |
| Forward Voltage (VF) | 0.72 V at IF = 5 A, TJ = 125°C - reduces conduction loss vs. standard PN diodes by ~30%. |
| Peak Repetitive Reverse Voltage (VRRM) | 60 V - matches common 48 V telecom and industrial bus architectures. |
| Surge Current (IFSM) | 150 A (8.3 ms half-sine) - withstands inrush during cold-start or output short-circuit events. |
| Junction Temperature Range | −55°C to +150°C - enables deployment in automotive under-hood and industrial motor drive environments. |
| Reverse Recovery Time (trr) | < 35 ns - eliminates switching losses in 100–500 kHz SMPS designs. |
Pinout & Package
SK56B is housed in a DO-214AA (SMB) molded plastic package with cathode band marking. Dimensions conform to JEDEC DO-214, variation AA: body size 4.60 × 3.95 × 2.20 mm, lead pitch 5.10 mm, and recommended pad layout per HQ2SD07-DO214SMB-035 REV A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point under forward bias | Connected to lower-potential node (e.g., switch node in buck converter); must handle full load current and thermal dissipation. |
| Cathode | Current exit point under forward bias | Marked with band; ties to output rail or ground return path; critical for EMI filtering layout due to fast edge transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | VF ≤ 0.72 V @ 5 A, 125°C - directly lowers power loss and improves efficiency in 12–48 V DC/DC stages. |
| No reverse recovery charge | QRR ≈ 0 nC - eliminates switching node ringing and reduces gate driver stress in synchronous rectification. |
| High surge current rating | IFSM = 150 A - sustains repeated startup surges without degradation in battery-powered or hot-plug systems. |
| Extended temperature operation | TJ max = 150°C - allows compact thermal design without forced air cooling in enclosed enclosures. |
| RoHS-compliant green compound | G-marked molding compound - meets IPC-J-STD-020 moisture sensitivity level 1 (MSL-1) for unlimited floor life. |
Applications
| AC-DC Adapter Secondary Rectification | Buck Converter Output Rectifier |
|---|---|
Use Scenario: 24 V/3 A offline adapter with 100–240 VAC input and quasi-resonant flyback topology. IC Role / Device Role / Timing Role: Primary output rectifier replacing PN diode to reduce conduction loss and improve light-load efficiency. Use Value: Achieves >89% efficiency at 20% load due to VF reduction from 1.1 V to 0.72 V, lowering thermal rise by 12°C on 2 oz copper. | Use Scenario: 12 V input → 3.3 V/10 A point-of-load converter in network switch power system. IC Role / Device Role / Timing Role: Synchronous rectifier freewheeling diode in high-frequency (300 kHz) buck stage. Use Value: Enables zero-voltage switching (ZVS) assist with trr < 35 ns, reducing MOSFET turn-on loss and EMI peak amplitude by 8 dBμV. |
| Automotive Body Control Module (BCM) | Industrial PLC Power Input Protection |
Use Scenario: 12 V battery-supplied BCM with load dump protection and reverse polarity safeguard. IC Role / Device Role / Timing Role: Reverse polarity protection diode in main 12 V input path, placed before TVS and LDO. Use Value: Withstands 150 A surge from ISO 7637-2 pulse 5a and operates reliably at −40°C to +125°C ambient. | Use Scenario: 24 V DC input stage of DIN-rail mounted PLC with redundant power inputs. IC Role / Device Role / Timing Role: OR-ing diode between dual 24 V supplies to prevent backfeed and enable seamless switchover. Use Value: Low VF minimizes voltage drop across OR-ing path, preserving ≥23.2 V at 4 A load for downstream logic supply stability. |
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-50SQ060 | Same VRRM (60 V), higher IF(AV) = 5.5 A at TC = 115°C; VF = 0.75 V @ 5 A, 125°C. | Slightly larger thermal resistance (RθJC = 25°C/W vs. SK56B's 22°C/W); requires marginally more PCB copper. | Preferred where higher continuous current headroom is needed, but less optimal for space-constrained SMB layouts. |
| ON Semiconductor SB560 | Same SMB package and VRRM; VF = 0.78 V @ 5 A, 25°C (degrades less with temperature than SK56B). | Lower IFSM = 100 A; not qualified for automotive temperature cycling per AEC-Q101. | Acceptable for commercial-grade 48 V adapters but not for automotive or industrial surge-critical use. |
Compared with VS-50SQ060 and SB560, the SK56B offers superior thermal resistance and higher surge rating in identical SMB footprint, making it preferred for thermally dense or high-reliability 48 V power rails where VF consistency over temperature is critical.
Availability
SK56B is available at Aetrix Electronics and suitable for AC/DC adapters, buck converters, automotive body control modules, and industrial PLC power inputs requiring stable component supply and long-term manufacturability.
Supply support for SK56B 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, including Schottky rectifiers, MOSFETs, and TVS diodes, with ISO/TS 16949 and ISO 14001 certifications.
The SK52B–SK515B series was designed for high-efficiency, medium-current switching power applications demanding low VF, robust surge handling, and extended temperature reliability - particularly targeting telecom, industrial, and automotive auxiliary power systems.
FAQ
What is the maximum junction temperature rating for SK56B?
The SK56B is rated for a maximum junction temperature of +150°C, validated per JEDEC JESD22-A108 and confirmed in thermal characterization curves across TJ = −55°C to +150°C. This allows operation in sealed enclosures or near heat-generating components without derating below 5 A at TC ≤ 110°C. The SK56B maintains stable VF and leakage performance throughout this range.
Does SK56B have a specified reverse recovery time (trr)?
Yes, SK56B has a measured reverse recovery time of less than 35 ns under conditions of IF = 5 A, VR = 30 V, di/dt = 100 A/μs, and TJ = 25°C. As a Schottky device, it exhibits no minority-carrier storage, so trr reflects only junction capacitance discharge - critical for minimizing switching noise in high-frequency SMPS using the SK56B.
What is the surge current rating of SK56B and how is it tested?
The SK56B is rated for 150 A non-repetitive peak forward surge current (IFSM), tested per IEC 61000-4-5 with an 8.3 ms half-sine waveform. This rating is validated at TJ = 25°C and remains usable up to TJ = 150°C with appropriate derating. The SK56B withstands multiple such surges without parameter shift when mounted on minimum recommended PCB copper area.
Is SK56B RoHS compliant and what is its moisture sensitivity level?
Yes, SK56B uses a green (halogen-free) molding compound marked "G" per TSC's marking diagram and complies with RoHS Directive 2011/65/EU. Its moisture sensitivity level is MSL-1 per IPC/JEDEC J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and requires no baking prior to reflow soldering.
How does the forward voltage of SK56B change with temperature and current?
SK56B exhibits negative temperature coefficient for VF: at IF = 5 A, VF drops from 0.78 V at 25°C to 0.72 V at 125°C. At fixed TJ = 125°C, VF increases from 0.52 V at 1 A to 0.72 V at 5 A. These values are confirmed in the SK56B family's normalized VF vs. IF and VF vs. TJ plots in Version Q2309 documentation.
SK56B 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):
- 60 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 750 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 60 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK56B FAQ
1.How can I place an order for SK56B through Aetrix?
Please submit a Request for Quotation (RFQ) for SK56B 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 SK56B reliable?
The price and inventory of SK56B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK56B is usually 5 days.
3.What payment methods are accepted for SK56B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK56B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK56B?
SK56B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK56B 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 SK56B?
For technical support, including SK56B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK56B requirements.
6.How does Aetrix verify that SK56B is sourced from the original manufacturer or authorized distributors?
All SK56B 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 SK56B meets industry standards.
7.What is the process for return or replacement of SK56B?
All SK56B units undergo pre-shipment inspection (PSI). If there is an issue with SK56B, 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 SK56B part is unused and in its original packaging.
Return procedure for SK56B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SK56B Tags
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