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Taiwan Semiconductor Corporation SK53CH
- Part No.:
- SK53CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK53CH.pdf
- Description:
- DIODE SCHOTTKY 30V 5A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,214
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Product details
Overview
SK53CH from Taiwan Semiconductor is a 5A, 30V AEC-Q101-qualified Schottky barrier rectifier in DO-214AB (SMC) package, featuring 0.55V forward voltage at 5A/25°C, 120A surge capability, and guard ring overvoltage protection - deployed in automotive DC/DC converters and reverse battery protection circuits.
For engineers reviewing the SK53CH datasheet, SK53CH pinout, SK53CH application, or SK53CH equivalent, key selection criteria include its 30V VRRM, low VF for high-efficiency power conversion, AEC-Q101 qualification for automotive reliability, and DO-214AB thermal performance with RθJL = 13°C/W.
Technical Context
The SK53CH is a single-die, unidirectional Schottky rectifier optimized for low-voltage, high-frequency switching. Its 30V repetitive peak reverse voltage and 120A non-repetitive surge rating support robust operation in transient-prone automotive power rails.
Thermal design is enabled by DO-214AB packaging with 13°C/W junction-to-lead resistance on standard PCB mounting. The device operates across –55°C to +150°C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum continuous reverse blocking voltage; defines safe operating limit in 12–24V automotive systems. |
| VF @ 5A, 25°C | 0.55 V - Low conduction loss enabling >92% efficiency in 5A DC/DC stages at light-to-moderate loads. |
| IFSM | 120 A - Withstands 8.3ms half-sine surges; supports load dump and cranking pulse immunity. |
| RθJL | 13 °C/W - Enables direct thermal coupling to PCB copper; allows 3.8W continuous dissipation with 50°C rise above lead temp. |
| TJ Range | –55°C to +150°C - Qualified for under-hood automotive environments including engine control units and lighting modules. |
| IR @ 30V, 25°C | 0.5 mA - Low leakage preserves battery standby life in always-on vehicle subsystems. |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode indicated by molded band; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current terminal | Connected to source side (e.g., battery positive or switch node); accepts up to 5A continuous forward current. |
| Cathode | Output current terminal | Connected to load or ground return path; polarity marked by visible cathode band per JEDEC DO-214AB standard. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Guard ring structure | Enhances edge termination robustness against voltage transients and localized field crowding in 30V blocking applications. |
| Low VF / high IF ratio | Delivers 5A average forward current with minimal self-heating - critical for thermally constrained SMC footprint layouts. |
| Halogen-free & RoHS compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green electronics manufacturing. |
Applications
| Automotive DC/DC Converters | Reverse Battery Protection |
|---|---|
Use Scenario: Step-down conversion from 12V/24V battery to 3.3V/5V rails in infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck topology; conducts during low-side switch off-time. Use Value: 0.55V VF reduces conduction loss by ~35% vs. comparable 40V Schottkys, improving thermal margin at 5A output. |
Use Scenario: Preventing damage when battery terminals are accidentally reversed during service or jump-start. IC Role / Device Role / Timing Role: Series-connected anode-to-battery-positive, cathode-to-system-rail; blocks reverse current flow. Use Value: 30V VRRM exceeds automotive load dump peaks while maintaining low forward drop for minimal insertion loss. |
| Car Lighting Drivers | Freewheeling Diodes in Motor Control |
Use Scenario: LED headlamp and DRL modules requiring high-reliability, low-loss rectification in constant-current drivers. IC Role / Device Role / Timing Role: Freewheeling path in boost or buck-boost LED driver ICs; handles PWM-switched inductor current. Use Value: AEC-Q101 qualification ensures longevity under thermal cycling from ambient –40°C to +105°C under hood. |
Use Scenario: Clamping inductive kickback in 12V wiper, HVAC blower, or power seat motor drivers. IC Role / Device Role / Timing Role: Parallel to motor winding; conducts flyback energy during MOSFET turn-off. Use Value: 120A IFSM withstands repeated motor stall events without degradation; DO-214AB mechanical robustness resists vibration fatigue. |
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-50SQ030ST | 30V VRRM, 5A IF, TO-277 package; VF = 0.52V @ 5A but higher RθJA (60°C/W vs. SK53CH's 53°C/W). | Same automotive use cases but requires larger thermal pad due to TO-277 footprint; not drop-in compatible with DO-214AB layout. | Select when lower VF is prioritized over board space; verify PCB pad redesign for TO-277 thermal relief. |
| ON Semiconductor SB530 | 30V VRRM, 5A IF, DO-201AD package; VF = 0.54V @ 5A but only rated to TJ = 125°C (vs. SK53CH's 150°C). | Suitable for cabin-grade applications but not under-hood; lacks AEC-Q101 qualification and guard ring. | Acceptable for cost-sensitive non-automotive industrial supplies where extended temperature and qualification are not required. |
Compared with VS-50SQ030ST and SB530, the SK53CH offers superior junction temperature rating (+150°C), AEC-Q101 validation, and integrated guard ring - making it the preferred choice for thermally demanding, safety-critical automotive power paths where long-term reliability is non-negotiable.
Availability
SK53CH is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and car lighting drivers requiring stable component supply across multi-year production cycles.
Supply support for SK53CH 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, rectifiers, and protection components.
The SK53CH belongs to TSC's AEC-Q101-qualified SKxCH Schottky rectifier family, engineered specifically for high-reliability 12V/24V automotive power systems demanding low VF, high surge tolerance, and robust thermal performance in compact SMC packages.
FAQ
What is the maximum junction temperature rating for the SK53CH?
The SK53CH has a maximum junction temperature (TJ) rating of +150°C, validated per AEC-Q101 stress testing. This enables reliable operation in under-hood automotive environments where ambient temperatures exceed 105°C. The device maintains specified electrical parameters up to this limit, and thermal derating curves in the datasheet define safe current limits at elevated temperatures. Always reference the forward current derating curve (Fig.1) when designing for sustained high-temperature operation of the SK53CH.
Is the SK53CH pin-compatible with other SKxCH series diodes like SK52CH or SK54CH?
Yes, the SK53CH shares identical DO-214AB (SMC) package dimensions, pinout, and mechanical footprint with all members of the SK52CH–SK520CH family, including SK52CH and SK54CH. Anode and cathode terminals are identically positioned and marked, allowing direct substitution in PCB layouts when voltage rating alignment permits. However, electrical parameters such as VRRM and VF differ across variants - the SK53CH must be used where 30V blocking and 0.55V forward voltage are required. Always verify system-level voltage margin before interchanging SK53CH with other SKxCH parts.
Does the SK53CH meet automotive qualification standards?
Yes, the SK53CH is explicitly AEC-Q101 qualified, as confirmed in the official Taiwan Semiconductor documentation. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress testing (uHAST), ensuring suitability for automotive powertrain, body, and chassis applications. The device also complies with J-STD-020 Level 1 moisture sensitivity and JESD201 Class 2 whisker resistance - all documented in the SK53CH datasheet revision C2311.
What is the typical forward voltage of the SK53CH at 5A and 125°C?
The SK53CH exhibits a typical forward voltage (VF) of 0.55V at 5A and 25°C, and increases to approximately 0.48V at 5A and 125°C due to negative temperature coefficient behavior of Schottky junctions. This reduction improves conduction efficiency at elevated operating temperatures common in automotive power modules. The exact value is confirmed in the "Typical Forward Characteristics" curve (Fig.4) of the SK53CH datasheet, which shows VF decreasing linearly with rising junction temperature under fixed current conditions.
How does the guard ring feature improve reliability in the SK53CH?
The guard ring in the SK53CH enhances edge termination robustness by distributing electric field stress away from the active junction periphery. This mitigates premature avalanche breakdown under transient overvoltage conditions - such as load dump pulses in automotive 12V systems - thereby extending device lifetime and improving consistency in high-reliability applications. The guard ring is integral to the die structure and contributes directly to the SK53CH's ability to sustain rated VRRM across temperature and lifetime without parameter drift.
SK53CH 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):
- 30 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 @ 30 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
SK53CH FAQ
1.How can I place an order for SK53CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SK53CH 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 SK53CH reliable?
The price and inventory of SK53CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK53CH is usually 5 days.
3.What payment methods are accepted for SK53CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK53CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK53CH?
SK53CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK53CH 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 SK53CH?
For technical support, including SK53CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK53CH requirements.
6.How does Aetrix verify that SK53CH is sourced from the original manufacturer or authorized distributors?
All SK53CH 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 SK53CH meets industry standards.
7.What is the process for return or replacement of SK53CH?
All SK53CH units undergo pre-shipment inspection (PSI). If there is an issue with SK53CH, 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 SK53CH part is unused and in its original packaging.
Return procedure for SK53CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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