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Taiwan Semiconductor Corporation SK55C M6G
- Part No.:
- SK55C M6G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK55C M6G.pdf
- Description:
- DIODE SCHOTTKY 50V 5A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,568
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Product details
Overview
SK55C M6G from Taiwan Semiconductor is a 5A, 50V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, featuring 0.75V forward voltage at 5A/25°C, 120A surge current capability, and junction temperature range of –55°C to +150°C. It serves as a high-efficiency output rectifier in DC-DC converters and offline SMPS secondary-side circuits.
For engineers reviewing the SK55C M6G datasheet, SK55C M6G pinout, SK55C M6G application, or SK55C M6G equivalent, key selection criteria include its 50V repetitive peak reverse voltage, low VF for reduced conduction loss, thermal resistance (RθJL = 13°C/W), RoHS/halogen-free compliance, and suitability for automated SMT assembly with moisture sensitivity level 1.
Technical Context
The SK55C M6G is a single-die, unidirectional Schottky rectifier optimized for high-frequency switching applications. Its guard ring structure provides overvoltage protection, and its matte tin-plated leads ensure solderability per J-STD-002.
With a critical rate of rise of off-state voltage (dV/dt) of 10,000 V/µs and junction-to-lead thermal resistance of 13°C/W, it supports fast transient response and efficient heat transfer to PCB copper pads under continuous 5A operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or forward converter output stages. |
| IF | 5 A - Continuous forward current rating; supports sustained load delivery without derating up to 110°C ambient on standard PCB layout. |
| VF | 0.75 V @ 5A, 25°C - Low conduction loss enables >92% efficiency in 12V-output SMPS designs at full load. |
| IFSM | 120 A - Peak non-repetitive surge current (8.3ms half-sine); withstands inrush and fault transients in adapter and lighting applications. |
| RθJL | 13 °C/W - Junction-to-lead thermal resistance; enables direct thermal path to PCB copper, reducing thermal stress during high-duty-cycle operation. |
| TJ max | +150 °C - Maximum junction temperature; allows reliable operation in enclosed industrial power supplies with limited airflow. |
| IR | 0.5 mA @ 50V, 25°C - Low reverse leakage preserves standby efficiency and minimizes no-load power draw. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by molded band. Case meets UL 94V-0; weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current terminal | Connected to transformer secondary or switch node; accepts forward current flow into device. |
| Cathode | Output current terminal | Connected to output capacitor and load; polarity marked by visible cathode band on body. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against transient overvoltage events without external snubbers in cost-sensitive adapters. |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cycle time and PCB handling risk. |
| High surge current capability (120A) | Supports robust startup behavior in LED drivers and AC/DC adapters subject to cold-circuit surges. |
| RoHS and halogen-free compliance | Meets global environmental regulations including EU RoHS 2011/65/EU and JEDEC JS709E. |
Applications
| AC/DC Adapters | LED Lighting Drivers |
|---|---|
Use Scenario: Secondary-side rectification in 12–24V, 30–60W wall adapters for consumer electronics. IC Role / Device Role / Timing Role: Schottky rectifier replacing conventional PN diodes to minimize conduction loss and improve light-load efficiency. Use Value: 0.75V VF reduces power dissipation by ~35% vs. 1.1V Si diode, lowering thermal design burden and enabling smaller heatsinks. |
Use Scenario: Output rectification in constant-current LED drivers for commercial downlights and street lighting. IC Role / Device Role / Timing Role: High-reliability freewheeling and output rectification element in buck and flyback topologies. Use Value: 120A IFSM withstands LED string short-circuit transients; 150°C TJ max ensures stable operation in thermally constrained enclosures. |
| Industrial SMPS | DC-DC Converters |
Use Scenario: Output stage rectification in 24V/48V industrial power supplies with wide ambient temperature range (–40°C to +85°C). IC Role / Device Role / Timing Role: Primary output rectifier delivering regulated DC bus to PLC I/O modules and sensors. Use Value: RθJL = 13°C/W enables direct thermal coupling to 16 mm × 16 mm Cu pad, maintaining TJ < 135°C at full load. |
Use Scenario: Synchronous rectifier replacement in isolated 5V/3.3V point-of-load converters for FPGA and microcontroller power rails. IC Role / Device Role / Timing Role: Low-VF passive rectifier in compact, low-noise DC-DC modules where gate drive complexity is avoided. Use Value: 0.75V VF at 5A yields <1.9W conduction loss-critical for maintaining <15°C temperature rise in space-constrained modules. |
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-50SQ030 | 30V VRRM, 0.42V VF @ 5A - lower voltage rating but significantly lower forward drop. | Best suited for ≤24V output rails where ultra-low conduction loss outweighs voltage margin needs. | Select when optimizing for efficiency below 30V output; not suitable for 48V systems or 50V-rated designs. |
| ON Semiconductor SB550 | 50V VRRM, 0.72V VF @ 5A, DO-214AA (SMB) package - same voltage rating, slightly lower VF, smaller footprint. | Preferred in space-constrained layouts; lower thermal mass requires tighter layout control for thermal management. | Choose for compact PCBs where SMC-to-SMB footprint reduction is acceptable and RθJA budget permits. |
Compared with VS-50SQ030 and SB550, the SK55C M6G offers balanced 50V rating and proven thermal robustness in DO-214AB, making it optimal for industrial adapters and lighting where reliability across temperature extremes and surge immunity are prioritized over minimal VF.
Availability
SK55C M6G is available at Aetrix Electronics and suitable for AC/DC adapters, LED lighting drivers, and industrial SMPS requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SK55C M6G 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 power electronics markets since 1979.
The SK55C M6G belongs to TSC's SK5xC Schottky rectifier family, engineered specifically for high-efficiency, high-reliability secondary-side rectification in cost-sensitive yet thermally demanding power conversion systems.
FAQ
What is the maximum junction temperature rating for the SK55C M6G?
The SK55C M6G has a maximum junction temperature (TJ) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet revision S2311. This rating allows continuous operation in enclosed industrial power supplies where ambient temperatures reach +85°C and PCB copper area is optimized for thermal conduction. The SK55C M6G must be mounted on a minimum 16 mm × 16 mm copper pad to maintain safe junction temperatures under full 5A load.
Does the SK55C M6G have a specified moisture sensitivity level (MSL)?
Yes, the SK55C M6G is rated at Moisture Sensitivity Level 1 (MSL-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 eliminates moisture-related popcorning risk and simplifies SMT line integration. The SK55C M6G's MSL-1 classification is confirmed in the "Features" section of the Taiwan Semiconductor SK52C–SK520C datasheet (S2311).
What is the forward voltage (VF) of the SK55C M6G at 5A and 125°C?
The SK55C M6G exhibits a typical forward voltage of 0.75V at 5A and 25°C, and increases to approximately 0.65V at 125°C due to the negative temperature coefficient of Schottky diodes. This value is derived from the "Typical Forward Characteristics" curves (Fig.4 and Fig.6) in the SK52C–SK520C datasheet (S2311), which show VF decreasing with rising junction temperature under constant current. The SK55C M6G's behavior remains consistent across its rated temperature range.
Is the SK55C M6G pin-compatible with other devices in the SK5xC series?
Yes, all SK5xC variants-including SK52C through SK520C-share identical DO-214AB (SMC) packaging, anode/cathode terminal configuration, and mechanical dimensions. The SK55C M6G uses the same two-terminal layout and cathode-band polarity marking as SK53C, SK54C, and SK56C, enabling direct substitution within the same voltage class when thermal and electrical margins permit. No PCB layout change is required when swapping within the SK5xC family.
What is the reverse leakage current (IR) of the SK55C M6G at 50V and 125°C?
At 50V reverse bias and 125°C junction temperature, the SK55C M6G has a maximum reverse leakage current of 10 mA, as specified in the "Electrical Specifications" table of the Taiwan Semiconductor SK52C–SK520C datasheet (S2311). This value reflects worst-case behavior under elevated thermal stress and is critical for evaluating standby power loss in energy-efficient adapters. The SK55C M6G maintains this performance without degradation across its qualified operating life.
SK55C M6G 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK55C M6G FAQ
1.How can I place an order for SK55C M6G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK55C M6G 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 SK55C M6G reliable?
The price and inventory of SK55C M6G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK55C M6G is usually 5 days.
3.What payment methods are accepted for SK55C M6G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK55C M6G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK55C M6G?
SK55C M6G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK55C M6G 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 SK55C M6G?
For technical support, including SK55C M6G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK55C M6G requirements.
6.How does Aetrix verify that SK55C M6G is sourced from the original manufacturer or authorized distributors?
All SK55C M6G 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 SK55C M6G meets industry standards.
7.What is the process for return or replacement of SK55C M6G?
All SK55C M6G units undergo pre-shipment inspection (PSI). If there is an issue with SK55C M6G, 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 SK55C M6G part is unused and in its original packaging.
Return procedure for SK55C M6G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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