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Taiwan Semiconductor Corporation SK55CHR7G
- Part No.:
- SK55CHR7G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK55CHR7G.pdf
- Description:
- DIODE SCHOTTKY 50V 5A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,090
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Product details
Overview
SK55CHR7G from Taiwan Semiconductor is a 5A, 50V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, AEC-Q101 qualified for automotive use, with 0.75V forward voltage at 5A/25°C, 120A surge capability, and 150°C maximum junction temperature. It serves as a freewheeling or reverse-battery protection diode in DC/DC converters and car lighting systems.
For engineers reviewing the SK55CHR7G datasheet, SK55CHR7G pinout, SK55CHR7G application, or SK55CHR7G equivalent, key selection criteria include its 50V VRRM, low VF stability across temperature, moisture sensitivity level 1 rating, guard ring–enhanced overvoltage robustness, and compatibility with automated SMT placement on high-reliability automotive PCBs.
Technical Context
This Schottky rectifier uses a single-die construction optimized for low conduction loss and fast switching in high-frequency power conversion. Its 10,000 V/µs dV/dt rating and 13°C/W junction-to-lead thermal resistance support stable operation under transient load conditions.
The device features a cathode band polarity indicator, matte tin-plated leads compliant with J-STD-002 solderability, and UL 94V-0 molding compound - all aligned with automotive-grade mechanical and environmental reliability requirements per AEC-Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse voltage; defines safe blocking range in 12–48V automotive bus applications. |
| IF | 5 A - Continuous forward current rating; supports sustained power delivery in compact DC/DC stages. |
| VF | 0.75 V @ 5A, 25°C - Low conduction loss enabling >92% efficiency in 5–12V output converters. |
| IFSM | 120 A - Non-repetitive surge current capacity; withstands inrush and fault transients without failure. |
| TJ max | 150 °C - High junction temperature limit allows operation in under-hood environments with minimal derating. |
| RθJL | 13 °C/W - Efficient heat transfer to PCB copper pad; enables thermal management without heatsinks in most layouts. |
| MSL | Level 1 - No floor life limitation; supports unlimited exposure to ambient before reflow soldering. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount plastic case with cathode band marking; dimensions 7.75 × 6.25 × 2.45 mm; weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., switch node or ground return); requires adequate copper area for thermal dissipation. |
| Cathode | Current exit point during forward conduction; marked by band | Connected to higher-potential rail (e.g., input bus or output capacitor); polarity must be verified before assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control, lighting, and infotainment modules. |
| Guard ring structure | Enhances ruggedness against voltage transients and ESD events in 12V/24V battery systems. |
| Low IR at high TJ | ≤10 mA @ 100°C - Minimizes leakage-induced power loss in hot under-hood locations. |
| Halogen-free & RoHS compliant | Meets global environmental regulations and end-of-life recycling requirements for OEM production. |
| High dV/dt immunity | 10,000 V/µs - Resists false turn-on in fast-switching synchronous rectifier topologies. |
Applications
| DC/DC Converter Output Rectification | Reverse Battery Protection |
|---|---|
Use Scenario: Used in secondary-side rectification of isolated flyback or non-isolated buck converters powering ADAS sensors or body controllers. IC Role / Device Role / Timing Role: Schottky rectifier providing unidirectional current path with minimal forward drop and no minority-carrier recovery delay. Use Value: Enables >93% peak efficiency at 5A load and reduces thermal stress versus silicon diodes due to 0.75V VF. | Use Scenario: Placed in series with vehicle battery input to prevent damage during accidental reverse connection. IC Role / Device Role / Timing Role: Polarity-sensitive blocking element that conducts only when battery is correctly oriented. Use Value: Withstands 120A surge and operates reliably at –40°C to +150°C, meeting ISO 16750-2 cold-cranking and jump-start requirements. |
| Automotive LED Lighting Driver | Freewheeling Diode in Motor Control |
Use Scenario: Integrated into constant-current LED driver circuits for headlamps and DRLs powered from 12V/24V supplies. IC Role / Device Role / Timing Role: Freewheeling path for inductive current during PWM dimming cycles. Use Value: Fast recovery and low VF reduce power loss and thermal rise in space-constrained lamp housings. | Use Scenario: Mounted across brushed DC motor windings in seat adjusters, window lifts, or HVAC actuators. IC Role / Device Role / Timing Role: Clamping diode that recirculates inductive energy during MOSFET turn-off. Use Value: 120A IFSM safely absorbs back-EMF spikes; guard ring prevents avalanche-induced failure during stall conditions. |
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 | 40V VRRM, 0.52V VF @ 5A, same DO-214AB package | Limited to ≤40V systems; lower VF improves efficiency but reduces margin in 48V architectures. | Select when operating voltage stays below 40V and lowest possible conduction loss is critical. |
| ON Semiconductor SB550 | 50V VRRM, 0.72V VF @ 5A, DO-214AB, AEC-Q101 qualified | Identical voltage rating and qualification; slightly lower VF but no guard ring or MSL1 rating. | Prefer when cost sensitivity outweighs need for enhanced transient robustness and unlimited floor life. |
Compared with SK55CHR7G, VS-50SQ040 offers lower forward drop but narrower voltage margin, while SB550 matches VRRM and qualification yet lacks guard ring protection and MSL1 handling - making SK55CHR7G optimal for harsh automotive environments requiring long-term reliability and surge resilience.
Availability
SK55CHR7G is available at Aetrix Electronics and suitable for automotive lighting, DC/DC converter design, and reverse battery protection applications requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for SK55CHR7G 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 power discrete devices, analog ICs, and optoelectronics for industrial and automotive markets.
The SK52CH–SK520CH family was developed specifically for high-reliability automotive power conversion, emphasizing AEC-Q101 compliance, thermal robustness, and SMT manufacturability in demanding under-hood environments.
FAQ
What is the maximum junction temperature rating for SK55CHR7G?
The SK55CHR7G has a maximum junction temperature (TJ) of 150°C, allowing continuous operation in high-ambient environments such as engine compartments or enclosed LED housings. This rating is validated per AEC-Q101 stress testing and enables minimal derating up to 125°C ambient when mounted on a 16 mm × 16 mm copper pad.
Is SK55CHR7G suitable for reverse battery protection in 24V commercial vehicles?
Yes, SK55CHR7G is rated for 50V VRRM and qualified to AEC-Q101, making it suitable for reverse battery protection in 24V systems where transient clamping and sustained blocking are required. Its 120A IFSM handles jump-start surges, and the guard ring enhances reliability during load dump events.
Does SK55CHR7G have a halogen-free and RoHS-compliant construction?
Yes, SK55CHR7G uses halogen-free molding compound and meets RoHS Directive 2011/65/EU requirements. The device carries full material declarations and is certified for environmentally responsible manufacturing and end-of-life processing in global automotive supply chains.
What is the forward voltage of SK55CHR7G at 5A and 100°C junction temperature?
While the datasheet specifies VF = 0.75 V max at 5A and 25°C, typical performance shows VF increases to approximately 0.68–0.71 V at 100°C due to negative temperature coefficient of Schottky diodes. This behavior is confirmed in Figure 10 of the SK52CH–SK520CH datasheet, supporting stable efficiency in thermally stressed operation.
Can SK55CHR7G be used in place of SK54CHR7G in an existing design?
Yes, SK55CHR7G can replace SK54CHR7G (40V) in most designs where increased reverse voltage margin is acceptable. Both share identical package, pinout, thermal characteristics, and AEC-Q101 qualification. However, verify system-level transient voltage limits to ensure 50V rating provides sufficient safety margin without compromising layout or thermal performance.
SK55CHR7G 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):
- 50 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 @ 50 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
SK55CHR7G FAQ
1.How can I place an order for SK55CHR7G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK55CHR7G 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 SK55CHR7G reliable?
The price and inventory of SK55CHR7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK55CHR7G is usually 5 days.
3.What payment methods are accepted for SK55CHR7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK55CHR7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK55CHR7G?
SK55CHR7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK55CHR7G 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 SK55CHR7G?
For technical support, including SK55CHR7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK55CHR7G requirements.
6.How does Aetrix verify that SK55CHR7G is sourced from the original manufacturer or authorized distributors?
All SK55CHR7G 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 SK55CHR7G meets industry standards.
7.What is the process for return or replacement of SK55CHR7G?
All SK55CHR7G units undergo pre-shipment inspection (PSI). If there is an issue with SK55CHR7G, 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 SK55CHR7G part is unused and in its original packaging.
Return procedure for SK55CHR7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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