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Taiwan Semiconductor Corporation SK54CHR7G
- Part No.:
- SK54CHR7G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK54CHR7G.pdf
- Description:
- DIODE SCHOTTKY 40V 5A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,071
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Product details
Overview
SK54CHR7G from Taiwan Semiconductor is a 5A, 40V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, AEC-Q101 qualified for automotive use, with 0.55V forward voltage at 5A/25°C, 120A surge capability, and guard-ring overvoltage protection. It serves as a freewheeling or reverse-battery protection diode in compact DC/DC converters.
For engineers reviewing the SK54CHR7G datasheet, SK54CHR7G pinout, SK54CHR7G application, or SK54CHR7G equivalent, key selection criteria include its 40V VRRM, low 0.55V VF at rated current, AEC-Q101 qualification, moisture sensitivity level 1 rating, and DO-214AB thermal performance (RθJL = 13°C/W).
Technical Context
This Schottky rectifier uses a single-die construction with guard-ring termination to enhance ruggedness against transient overvoltage events. Its low forward voltage and high surge current (120A IFSM) support high-efficiency operation in 25–150°C junction temperature range.
The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements. Polarity is marked by cathode band; terminals are matte tin-plated for reliable solderability per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage; defines safe blocking capability in 12–36V automotive bus applications |
| IF | 5 A - Continuous forward current; supports sustained power delivery in compact converter outputs |
| VF @ 5A, 25°C | 0.55 V - Low conduction loss enabling >92% efficiency in 5V–12V buck stages |
| IFSM | 120 A - Peak non-repetitive surge current; withstands load dump transients without failure |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood environments with minimal derating |
| RθJL | 13 °C/W - Junction-to-lead thermal resistance; allows direct PCB copper pad heat sinking for thermal management |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
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 | Current entry point | Connected to input/source side; accepts forward current up to 5A continuous |
| Cathode | Current exit point | Marked by band; connects to output/load side; blocks reverse voltage up to 40V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control units and lighting modules |
| Guard ring structure | Improves dv/dt immunity and prevents premature edge breakdown during voltage transients |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or dry-pack handling |
| Low VF at high current | Reduces conduction losses in high-frequency switching converters operating above 200 kHz |
| Halogen-free & RoHS compliant | Meets EU environmental directives and automotive OEM material declaration requirements |
Applications
| Automotive LED Lighting | 12V Automotive DC/DC Converters |
|---|---|
Use Scenario: Reverse polarity protection in headlamp and DRL driver circuits exposed to battery reversal during service. IC Role / Device Role / Timing Role: Discrete Schottky rectifier providing unidirectional current path with minimal voltage drop. Use Value: 0.55V VF limits power loss to <2.8W at 5A, preventing thermal runaway in sealed lamp housings. | Use Scenario: Freewheeling diode in synchronous buck converter secondary stage for infotainment power supply. IC Role / Device Role / Timing Role: Fast-recovery freewheeling path during high-side MOSFET off-time. Use Value: 120A IFSM handles peak inductor current surges during cold-crank conditions without degradation. |
| Reverse Battery Protection | Industrial 24V Power Supplies |
Use Scenario: Input protection for telematics control units connected directly to vehicle battery. IC Role / Device Role / Timing Role: Series-blocking diode preventing damage from accidental negative battery connection. Use Value: 40V VRRM provides 2× margin over 12V nominal systems, ensuring robustness during load dump events. | Use Scenario: Output rectification in isolated flyback supplies powering PLC I/O modules. IC Role / Device Role / Timing Role: Primary output rectifier delivering regulated 5V/3.3V rails with low conduction loss. Use Value: RθJL = 13°C/W enables direct thermal coupling to 16mm × 16mm Cu pad, maintaining TJ < 125°C at full load. |
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-50WQ04FN-M3/45 | Same 40V VRRM, 5A IF, but TO-220AC package; higher RθJA (40°C/W vs. 53°C/W) | Requires heatsink for same power dissipation; not surface-mount compatible | Select when through-hole mounting or higher surge tolerance (150A IFSM) is required |
| ON Semiconductor SB540-E3/54 | 40V VRRM, 5A IF, DO-214AA (SMA) package; lower IFSM (100A) and higher VF (0.58V) | Smaller footprint but reduced surge margin and thermal capability (RθJL = 18°C/W) | Select when board space is constrained and surge stress is below 100A |
Compared with SK54CHR7G, the VS-50WQ04FN-M3/45 offers higher surge rating but requires mechanical mounting and heatsinking, while the SB540-E3/54 saves area but sacrifices thermal performance and transient robustness-making SK54CHR7G optimal for AEC-Q101-compliant SMT designs needing balanced efficiency, ruggedness, and manufacturability.
Availability
SK54CHR7G is available at Aetrix Electronics and suitable for automotive LED lighting, 12V DC/DC converters, and reverse battery protection requiring stable component supply across production lifecycles.
Supply support for SK54CHR7G 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, serving global automotive, industrial, and consumer markets since 1979.
The SK5xCH series targets automotive-grade power rectification, emphasizing AEC-Q101 compliance, low-loss Schottky architecture, and robust packaging for under-hood and lighting applications.
FAQ
What is the maximum junction temperature rating for SK54CHR7G?
The SK54CHR7G has a maximum junction temperature (TJ) of +150°C, validated across its full operating range from –55°C to +150°C. This rating enables reliable deployment in under-hood automotive environments where ambient temperatures exceed 105°C. The device's RθJL of 13°C/W allows effective heat transfer to PCB copper pads, helping maintain SK54CHR7G junction temperature within specification under continuous 5A load.
Is SK54CHR7G suitable for reverse battery protection in 12V automotive systems?
Yes, SK54CHR7G is specifically designed for reverse battery protection in 12V automotive systems. With a 40V VRRM, it provides double the margin over nominal 12V bus voltage and withstands load dump transients. Its AEC-Q101 qualification, guard ring structure, and 120A IFSM ensure robustness against polarity reversal events-making SK54CHR7G a proven choice in telematics and body control modules.
What does the "R7G" suffix in SK54CHR7G indicate?
The "R7G" suffix in SK54CHR7G denotes tape-and-reel packaging: "R7" indicates 3,000 units per reel, and "G" signifies green (halogen-free) molding compound per JEDEC standards. This matches the ordering code SK5xCH in the DO-214AB (SMC) package with RoHS and halogen-free compliance confirmed in the official Taiwan Semiconductor documentation for SK54CHR7G.
How does SK54CHR7G compare to SK53CHR7G in forward voltage performance?
At 5A and 25°C, SK54CHR7G specifies a maximum forward voltage (VF) of 0.55V, identical to SK53CHR7G (30V version). Both share the same die process and thermal design, resulting in matched conduction loss characteristics. The primary distinction lies in VRRM: SK53CHR7G is rated for 30V, while SK54CHR7G is rated for 40V-making SK54CHR7G preferable in 24V auxiliary systems or 12V applications with elevated transient margins.
Does SK54CHR7G require special handling during reflow soldering?
No, SK54CHR7G does not require special handling during reflow soldering. It is rated at moisture sensitivity level (MSL) 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and subjected to standard lead-free reflow profiles without baking. Its matte tin-plated leads comply with J-STD-002 for solderability, and the DO-214AB package is optimized for automated placement-ensuring reliable SK54CHR7G assembly in high-volume SMT lines.
SK54CHR7G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
SK54CHR7G FAQ
1.How can I place an order for SK54CHR7G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK54CHR7G 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 SK54CHR7G reliable?
The price and inventory of SK54CHR7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK54CHR7G is usually 5 days.
3.What payment methods are accepted for SK54CHR7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK54CHR7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK54CHR7G?
SK54CHR7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK54CHR7G 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 SK54CHR7G?
For technical support, including SK54CHR7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK54CHR7G requirements.
6.How does Aetrix verify that SK54CHR7G is sourced from the original manufacturer or authorized distributors?
All SK54CHR7G 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 SK54CHR7G meets industry standards.
7.What is the process for return or replacement of SK54CHR7G?
All SK54CHR7G units undergo pre-shipment inspection (PSI). If there is an issue with SK54CHR7G, 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 SK54CHR7G part is unused and in its original packaging.
Return procedure for SK54CHR7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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