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Taiwan Semiconductor Corporation SK54CH
- Part No.:
- SK54CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK54CH.pdf
- Description:
- DIODE SCHOTTKY 40V 5A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,421
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Product details
Overview
SK54CH from Taiwan Semiconductor is a 5A, 40V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, qualified to AEC-Q101, with 0.55V forward voltage at 5A/25°C, 120A surge capability, and 150°C maximum junction temperature - used for freewheeling and reverse battery protection in automotive lighting systems.
For engineers reviewing the SK54CH datasheet, SK54CH pinout, SK54CH application, or SK54CH equivalent, key selection factors include its 40V VRRM, low VF at high current, AEC-Q101 qualification, thermal resistance (RθJL = 13°C/W), and DO-214AB mechanical compatibility in space-constrained DC/DC converters.
Technical Context
The SK54CH is a single-die Schottky rectifier optimized for low-loss, high-frequency operation in automotive and industrial power supplies. Its guard ring structure provides overvoltage protection, and it meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Designed for surface-mount assembly, the device delivers stable performance across –55°C to +150°C junction temperature range. With 10,000 V/µs critical dV/dt rating and 0.5 mA max reverse leakage at 25°C, it supports reliable switching in noisy 12V/24V vehicle electrical environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage; defines safe blocking capability in 24V automotive systems with transient margin. |
| IF | 5 A - Continuous forward current rating; supports sustained conduction in compact DC/DC output stages. |
| VF @ 5A, 25°C | 0.55 V - Low forward drop reduces power loss (2.75 W) and thermal stress in high-current paths. |
| IFSM | 120 A - Peak non-repetitive surge current; handles load dump and cranking transients without failure. |
| RθJL | 13 °C/W - Junction-to-lead thermal resistance; enables efficient heat transfer to PCB copper when mounted per JEDEC layout. |
| TJ max | 150 °C - Maximum operating junction temperature; allows use in under-hood environments with minimal derating. |
| IR @ 40V, 25°C | 0.5 mA - Low reverse leakage ensures minimal standby power loss in battery-critical applications like reverse polarity protection. |
Pinout & Package
Package: DO-214AB (SMC), molded plastic case with matte tin-plated leads, cathode indicated by band, weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or switch node) in freewheeling or reverse protection configurations. |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to positive rail in reverse battery protection or inductor return path in buck converter freewheeling. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood deployment. |
| Guard ring structure | Enhances ruggedness against voltage transients and edge breakdown, improving long-term stability in 12V/24V battery systems. |
| Level 1 moisture sensitivity | Enables standard SMT reflow without baking; eliminates production delays and moisture-related delamination risk. |
| Halogen-free & RoHS compliant | Meets global environmental compliance requirements for automotive OEMs and industrial equipment manufacturers. |
| High dV/dt rating (10,000 V/µs) | Prevents false turn-on during fast-switching events in synchronous rectifier or boost converter topologies. |
Applications
| Automotive Lighting Power Supply | 12V/24V Reverse Battery Protection |
|---|---|
Use Scenario: LED headlamp driver with buck regulator and input filtering. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectified buck stage. Use Value: 0.55V VF minimizes conduction loss and thermal rise, enabling smaller heatsinking in sealed lamp housings. |
Use Scenario: Input protection circuit for infotainment head unit powered from vehicle battery. IC Role / Device Role / Timing Role: Series-connected reverse polarity blocking diode. Use Value: Low 0.5 mA IR prevents battery drain during vehicle off-state; AEC-Q101 ensures longevity across temperature cycles. |
| DC/DC Converter Output Stage | Industrial 24V PLC Power Module |
Use Scenario: Secondary-side rectification in isolated 24V-to-5V flyback supply. IC Role / Device Role / Timing Role: Output rectifier handling continuous 5A load current. Use Value: RθJL = 13°C/W enables direct thermal coupling to PCB copper, reducing need for external heatsinks. |
Use Scenario: Input-stage protection and freewheeling in DIN-rail mounted 24V power module. IC Role / Device Role / Timing Role: Dual-role device: reverse polarity clamp and inductive kick suppression. Use Value: 120A IFSM withstands relay coil de-energization spikes; DO-214AB footprint fits dense industrial PCB layouts. |
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-50SQ040 | Same 40V VRRM, 5A IF, but VF = 0.57V @ 5A; TO-277 package (smaller footprint than DO-214AB). | TO-277 lacks AEC-Q101 certification; not approved for automotive safety-critical modules. | Select if board space is constrained and automotive qualification is not required. |
| ON Semiconductor SB540 | 40V VRRM, 5A IF, VF = 0.54V @ 5A; DO-214AA (SMB) package - 1.5mm shorter than DO-214AB. | Lower surge rating (IFSM = 100A vs. 120A); no AEC-Q101 qualification documented. | Acceptable for cost-sensitive industrial DC/DC where transient robustness is secondary. |
Compared with VS-50SQ040 and SB540, the SK54CH offers verified AEC-Q101 qualification, higher surge tolerance, and thermal performance optimized for DO-214AB mounting - making it the preferred choice for automotive-grade 40V Schottky rectification where reliability and transient immunity are mandatory.
Availability
SK54CH is available at Aetrix Electronics and suitable for automotive lighting power supplies, 12V/24V reverse battery protection circuits, and industrial DC/DC converter output stages requiring stable component supply and long-lifecycle support.
Supply support for SK54CH 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 semiconductor manufacturer specializing in discrete power devices, with global distribution and ISO/TS 16949-certified automotive production lines.
The SK54CH belongs to TSC's AEC-Q101-qualified SK5xCH Schottky rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in automotive and industrial 12V–24V systems.
FAQ
What is the peak repetitive reverse voltage rating of the SK54CH?
The SK54CH has a peak repetitive reverse voltage (VRRM) rating of 40 V. This value is specified in the Absolute Maximum Ratings table and confirmed across all electrical test conditions in the datasheet. The 40 V rating ensures reliable blocking in nominal 24V automotive systems with typical load-dump transients up to 35V, providing necessary design margin for SK54CH applications.
Is the SK54CH qualified for automotive use?
Yes, the SK54CH is explicitly qualified to AEC-Q101 standards, as stated in the FEATURES section and verified in the qualification report referenced in Version C2311. This includes stress tests for temperature cycling, high-temperature reverse bias, and mechanical shock - confirming SK54CH suitability for under-hood and dashboard-mounted automotive electronics.
What is the forward voltage of the SK54CH at rated current?
The SK54CH exhibits a typical forward voltage (VF) of 0.55 V at 5 A and 25°C junction temperature, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the conduction loss baseline for thermal and efficiency calculations in SK54CH-based designs.
Does the SK54CH have a defined moisture sensitivity level?
Yes, the SK54CH has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and subjected to standard reflow profiles without pre-baking. This MSL rating is documented in the FEATURES list and confirmed in the Mechanical Data section for SK54CH.
What package type does the SK54CH use?
The SK54CH uses the DO-214AB (SMC) surface-mount package, as specified in the MECHANICAL DATA, ORDERING INFORMATION, and PACKAGE OUTLINE DIMENSIONS sections. Its dimensions (7.75 mm × 6.25 mm × 2.45 mm) and pad layout recommendations are fully detailed in the datasheet for SK54CH.
SK54CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 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 @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK54CH FAQ
1.How can I place an order for SK54CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SK54CH 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 SK54CH reliable?
The price and inventory of SK54CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK54CH is usually 5 days.
3.What payment methods are accepted for SK54CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK54CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK54CH?
SK54CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK54CH 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 SK54CH?
For technical support, including SK54CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK54CH requirements.
6.How does Aetrix verify that SK54CH is sourced from the original manufacturer or authorized distributors?
All SK54CH 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 SK54CH meets industry standards.
7.What is the process for return or replacement of SK54CH?
All SK54CH units undergo pre-shipment inspection (PSI). If there is an issue with SK54CH, 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 SK54CH part is unused and in its original packaging.
Return procedure for SK54CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SK54CH Tags
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