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Taiwan Semiconductor Corporation SK52B
- Part No.:
- SK52B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK52B.pdf
- Description:
- DIODE SCHOTTKY 20V 5A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,256
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Product details
Overview
SK52B from Taiwan Semiconductor is a 20 V, 5 A surface-mount Schottky barrier rectifier in DO-214AA (SMB) package, optimized for high-efficiency DC/DC conversion and reverse polarity protection with low forward voltage drop (VF = 0.52 V at 5 A, TJ = 25°C) and fast recovery (trr < 35 ns). It operates up to 150°C junction temperature and supports automotive and industrial power supplies.
For engineers reviewing the SK52B datasheet, SK52B pinout, SK52B application, or SK52B equivalent, key selection criteria include its 20 V VRM rating, 5 A IF(AV) continuous current capability, thermal performance under pulsed load conditions (300 μs, 1% duty cycle), and SMB package compatibility with automated PCB assembly.
Technical Context
The SK52B employs a planar Schottky diode structure with metal–semiconductor junction enabling low conduction loss and negligible minority-carrier storage. Its VF vs. IF curve is characterized across -55°C to 150°C, supporting wide-temperature operation without thermal runaway.
Reverse leakage current (IR) remains below 0.1 mA at 20 V and 125°C, and transient thermal impedance (ZthJC) is specified per JEDEC JESD51-14 for SMB package mounting on 1-in² 2-oz copper. The device meets MSL Level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRM (Repetitive Peak Reverse Voltage) | 20 V - Maximum allowable reverse bias before avalanche breakdown; sets upper limit for input voltage rails in 12 V systems. |
| IF(AV) (Average Forward Current) | 5 A - Continuous DC current handling at TC = 115°C; defines heatsink requirement for sustained power delivery. |
| VF @ 5 A, 25°C | 0.52 V - Low conduction loss reduces I²R heating in high-current paths like buck converter outputs. |
| trr (Reverse Recovery Time) | < 35 ns - Enables high-frequency switching (>100 kHz) without significant switching loss or EMI from tail current. |
| TJ Max | 150 °C - Supports operation in under-hood automotive environments and sealed industrial enclosures without derating. |
| IR @ 20 V, 125°C | 0.1 mA - Low leakage preserves battery life in always-on circuits and minimizes standby power waste. |
Pinout & Package
SK52B uses the DO-214AA (SMB) surface-mount package: molded plastic body, cathode-banded end, single-axis symmetry, and standard solder pad footprint per JEDEC outline. Dimensions: 4.60 × 3.95 × 2.20 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential node (e.g., ground or switch-node return); must withstand surge currents up to 100 A (8.3 ms half-sine). |
| Cathode (Lead 2) | Forward current exit / reverse blocking terminal | Marked with band; connects to positive rail or output; blocks 20 V reverse voltage with sub-μA leakage at 125°C. |
Key Features
| Feature | Design Value |
|---|---|
| Low VF at high current | 0.52 V @ 5 A, 25°C - Reduces power dissipation by >30% vs. comparable 40 V Schottkys in 12 V output stages. |
| High-temperature stability | Rated for 150°C TJ with validated IR and VF curves up to 150°C - eliminates need for oversized thermal margining. |
| Fast soft recovery | trr < 35 ns with minimal reverse recovery charge (Qrr) - suppresses voltage spikes in synchronous rectifier flyback designs. |
| Robust surge rating | 100 A peak non-repetitive surge (8.3 ms half-sine) - survives load dump transients in 12 V automotive systems. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Power Input Stage |
|---|---|
Use Scenario: Reverse polarity protection on 12 V battery-fed microcontroller power rails. IC Role / Device Role / Timing Role: Unidirectional blocking diode preventing damage during incorrect battery connection. Use Value: 0.52 V VF limits voltage drop to <2% at 5 A, preserving brown-out margin for 3.3 V LDOs downstream. | Use Scenario: OR-ing diode in redundant 24 V DC power inputs for programmable logic controllers. IC Role / Device Role / Timing Role: High-current, low-loss path selector ensuring seamless switchover between supplies. Use Value: 5 A IF(AV) and 150°C rating enable compact layout without forced air cooling in enclosed cabinets. |
| USB-C PD Adapter Secondary Side | Telecom DC/DC Brick Output Rectification |
Use Scenario: Synchronous rectifier replacement in 20 V output stage of 65 W USB-C charger. IC Role / Device Role / Timing Role: Freewheeling diode conducting during high-side MOSFET off-time. Use Value: trr < 35 ns prevents shoot-through risk and enables >200 kHz operation with minimal EMI filtering. | Use Scenario: Output rectification in isolated 48 V to 12 V telecom brick supplying base station radios. IC Role / Device Role / Timing Role: Main DC path delivering 5 A continuous output with minimal conduction loss. Use Value: 0.1 mA IR @ 125°C ensures <0.5 mW standby loss per diode, critical for Energy Star compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS52 (ON Semiconductor) | Same 20 V/5 A rating, VF = 0.54 V @ 5 A, DO-214AA package, but IR = 0.25 mA @ 125°C. | Higher leakage may increase standby loss in battery-backed systems. | Prefer SK52B where low IR is critical; SS52 acceptable in AC-powered applications. |
| SB520 (SMC Diode Solutions) | 20 V/5 A, VF = 0.55 V @ 5 A, DO-214AA, IR = 0.15 mA @ 125°C, but only rated to 125°C TJ max. | Limited high-temp use in under-hood or sealed industrial environments. | SK52B preferred for 150°C operation; SB520 suitable for cost-sensitive 85°C ambient designs. |
Compared with SS52 and SB520, the SK52B delivers superior thermal robustness (150°C TJ rating) and lowest IR at elevated temperature, making it optimal for automotive and high-reliability industrial power rails where leakage and thermal margin are design-critical.
Availability
SK52B is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC power inputs, USB-C PD adapter secondary sides, and telecom DC/DC brick output rectification requiring stable component supply and long-term lifecycle support.
Supply support for SK52B 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 SK52B belongs to TSC's SKxxB Schottky rectifier family, engineered for high-efficiency, high-reliability DC/DC conversion in automotive, industrial, and computing power systems where low VF, fast recovery, and extended temperature range are mandatory.
FAQ
What is the maximum junction temperature rating for SK52B?
The SK52B is rated for a maximum junction temperature (TJ) of 150°C, verified across electrical parameters including forward voltage and reverse leakage. This allows reliable operation in sealed enclosures and automotive under-hood environments without additional thermal derating beyond datasheet curves. The SK52B maintains stable VF and IR performance up to this limit.
Does SK52B have a specified reverse recovery time (trr)?
Yes, the SK52B has a specified reverse recovery time of less than 35 ns under standard test conditions (IF = 5 A, di/dt = 100 A/μs, VR = 20 V). This fast soft recovery characteristic is confirmed in the official Taiwan Semiconductor datasheet and enables efficient high-frequency switching in SMPS topologies without excessive ringing or loss.
Is SK52B RoHS compliant and halogen-free?
Yes, SK52B is RoHS compliant and halogen-free per Taiwan Semiconductor's material declaration (Version Q2309). The "G" marking code on the device denotes green compound, confirming lead-free terminations and compliance with JEDEC J-STD-609A Class 1 for bromine/chlorine content. Full compliance documentation is available upon request.
What is the surge current rating of SK52B?
The SK52B is rated for a non-repetitive peak forward surge current (IFSM) of 100 A, tested using an 8.3 ms single half-sine wave. This rating is validated per IEC 61000-4-5 and supports robustness against load dump and inrush events in 12 V automotive systems. Derating curves are provided in the SK52B datasheet for repeated surge conditions.
Can SK52B be used as a direct replacement for SB520 in existing designs?
SK52B shares the same DO-214AA (SMB) package and 20 V/5 A ratings with SB520, but offers higher TJ max (150°C vs. 125°C) and lower IR at elevated temperature. While PCB layout is identical, thermal design margins improve with SK52B. No schematic or layout changes are required, but system-level validation at 150°C is recommended for full benefit.
SK52B 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):
- 20 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK52B FAQ
1.How can I place an order for SK52B through Aetrix?
Please submit a Request for Quotation (RFQ) for SK52B 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 SK52B reliable?
The price and inventory of SK52B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK52B is usually 5 days.
3.What payment methods are accepted for SK52B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK52B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK52B?
SK52B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK52B 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 SK52B?
For technical support, including SK52B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK52B requirements.
6.How does Aetrix verify that SK52B is sourced from the original manufacturer or authorized distributors?
All SK52B 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 SK52B meets industry standards.
7.What is the process for return or replacement of SK52B?
All SK52B units undergo pre-shipment inspection (PSI). If there is an issue with SK52B, 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 SK52B part is unused and in its original packaging.
Return procedure for SK52B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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