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Taiwan Semiconductor Corporation SK85C R7G
- Part No.:
- SK85C R7G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK85C R7G.pdf
- Description:
- DIODE SCHOTTKY 50V 8A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,840
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Product details
Overview
SK85C R7G from Taiwan Semiconductor is a 50V, 8A surface-mount Schottky barrier rectifier in DO-214AB (SMC) package, featuring 0.75V forward voltage at 8A/25°C, 150A surge capability, and 10mA reverse leakage at 100°C - used in high-efficiency AC/DC adapters and DC-DC converters.
For engineers reviewing the SK85C R7G datasheet, SK85C R7G pinout, SK85C R7G application, or SK85C R7G equivalent, key selection criteria include VRRM = 50V, IF = 8A continuous, thermal resistance RθJA = 20°C/W, junction temperature rating up to +150°C, and RoHS/halogen-free compliance for industrial power supply designs.
Technical Context
This Schottky rectifier uses a single-die construction with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its low VF enables high efficiency in high-frequency switching topologies where conduction loss dominates.
The device operates across -55°C to +150°C junction range, supports 8.3ms non-repetitive surge currents up to 150A, and exhibits dV/dt rating of 10,000 V/µs - enabling robust performance in flyback and boost converter secondary-side rectification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - maximum repetitive reverse voltage; defines safe blocking capability in 48V-output SMPS secondary circuits |
| IF | 8 A - continuous forward current; supports compact 65W–100W adapter designs without forced air cooling |
| VF @ 8A, 25°C | 0.75 V - low conduction loss; reduces power dissipation by ~25% vs. comparable 60V Si diodes |
| IFSM | 150 A - peak surge rating; withstands inrush and transient overloads in offline power supplies |
| RθJA | 20 °C/W - junction-to-ambient thermal resistance; enables 2.5W dissipation at 50°C ambient with standard PCB copper area |
| TJ max | +150 °C - maximum operating junction temperature; allows operation in sealed enclosures or high-ambient environments |
| IR @ 50V, 100°C | 10 mA - reverse leakage at elevated temperature; ensures stable regulation under thermal stress in LED drivers |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode-indicated by band, matte tin-plated leads, UL 94V-0 molding compound, weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to transformer secondary or switch node; requires low-inductance layout to minimize ringing |
| Cathode | Current exit point during forward conduction | Connected to output capacitor and load; polarity band must align with PCB silkscreen and schematic symbol |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against transient overvoltage events without external snubbers in flyback outputs |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; compatible with standard SMT assembly lines |
| High dV/dt rating (10,000 V/µs) | Prevents false turn-on during fast-switching transitions in 100+ kHz converters |
| Halogen-free per IEC 61249-2-21 | Meets environmental compliance for export to EU, Japan, and China without material declaration overhead |
Applications
| AC/DC Adapters | LED Constant-Current Drivers |
|---|---|
Use Scenario: 36W–65W universal-input wall adapters powering consumer electronics. IC Role / Device Role / Timing Role: Secondary-side synchronous rectification replacement; conducts output current during transformer demagnetization phase. Use Value: 0.75V VF reduces conduction loss by ≥1.2W vs. 1N5822, improving efficiency from 87% to 89.5% at full load. | Use Scenario: Isolated buck-boost LED drivers for street lighting with 36–56V output. IC Role / Device Role / Timing Role: Output rectifier in primary-side regulated flyback topology; handles 8A pulsed output current. Use Value: 150A IFSM accommodates 3× inrush surges during cold-start, preventing fuse blowout or MOSFET failure. |
| Industrial DC-DC Converters | USB PD Power Delivery Modules |
Use Scenario: 48V input, 12V/8A isolated DC-DC modules for factory automation controllers. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in forward converter; clamps transformer reset energy. Use Value: RθJA = 20°C/W enables 2.5W dissipation with ≤25°C rise on 1 oz. copper, avoiding heatsink cost. | Use Scenario: 100W USB PD 3.1 EPR power bricks with dual-output (28V/5A + 20V/5A). IC Role / Device Role / Timing Role: Output rectifier in asymmetrical half-bridge secondary; handles high-duty-cycle conduction. Use Value: 10mA IR at 100°C prevents output voltage drift in thermally constrained multi-rail 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-85CTH05-M3/45 | Same DO-214AB package, 50V/8A rating, but VF = 0.72V @ 8A and IR = 8mA @ 100°C | Slightly lower leakage improves light-load regulation in battery-powered systems | Preferred when <10µA standby leakage is critical; otherwise SK85C R7G offers better cost/performance balance |
| ON Semiconductor SB850 | DO-214AB, 50V/8A, VF = 0.78V @ 8A, IFSM = 120A, RθJA = 22°C/W | Lower surge rating limits use in high-inrush applications like motor drives | Select SK85C R7G for designs requiring 150A surge headroom or tighter thermal margin |
Compared with VS-85CTH05-M3/45 and SB850, SK85C R7G delivers optimal trade-off between forward loss (0.75V), thermal resistance (20°C/W), and surge robustness (150A), making it preferred for cost-sensitive, thermally constrained 50V-output SMPS where reliability under transient overload is essential.
Availability
SK85C R7G is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and industrial DC-DC converters requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SK85C R7G 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 SK8xC series is part of TSC's high-current Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in compact, thermally demanding power supplies.
FAQ
What is the maximum junction temperature rating for SK85C R7G?
The SK85C R7G has a maximum junction temperature (TJ) rating of +150°C, allowing reliable operation in enclosed or high-ambient-temperature environments such as sealed LED drivers or industrial power modules. This rating is confirmed in the Absolute Maximum Ratings table of the official TSC datasheet (Version L2102). The SK85C R7G maintains specified electrical performance up to this limit when thermal design respects RθJA = 20°C/W.
Does SK85C R7G have a halogen-free construction?
Yes, SK85C R7G is halogen-free in accordance with IEC 61249-2-21, as explicitly stated in the FEATURES section of the TSC datasheet. This ensures compliance with environmental regulations in the EU, Japan, and other major markets without requiring additional material declarations. The SK85C R7G uses halogen-free molding compound and lead finish, verified through standardized testing protocols.
What is the forward voltage of SK85C R7G at 8A and 100°C?
The forward voltage (VF) of SK85C R7G is not specified at 8A and 100°C in the official datasheet; only the 25°C value (0.75V) and 100°C reverse leakage (10mA) are provided. However, typical VF increases ~2 mV/°C - estimating ~0.85V at 100°C. For precise thermal modeling, engineers should consult the Fig.4 Typical Forward Characteristics curve in the SK85C R7G datasheet.
Is SK85C R7G suitable for automotive applications?
No, SK85C R7G is not qualified for automotive applications. The TSC datasheet explicitly states: "The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications." It lacks AEC-Q101 qualification, extended temperature validation beyond +150°C, and automotive-grade PPAP documentation. For automotive-grade alternatives, consider TSC's AEC-Q101-certified SKxxC-A series or equivalent qualified parts.
What does the 'R7G' suffix indicate in SK85C R7G?
The 'R7G' suffix in SK85C R7G denotes tape-and-reel packaging (R7 = 3,000 pcs/reel per TSC ordering code convention) and green (halogen-free) compound (G). This matches the ORDERING INFORMATION table in the datasheet, which specifies "SK8xC" as the base code and confirms DO-214AB packaging with 3,000-unit tape-and-reel delivery. The SK85C R7G marking also includes YW date code and F factory code per the Marking Diagram.
SK85C R7G 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):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 750 mV @ 8 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
SK85C R7G FAQ
1.How can I place an order for SK85C R7G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK85C R7G 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 SK85C R7G reliable?
The price and inventory of SK85C R7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK85C R7G is usually 5 days.
3.What payment methods are accepted for SK85C R7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK85C R7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK85C R7G?
SK85C R7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK85C R7G 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 SK85C R7G?
For technical support, including SK85C R7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK85C R7G requirements.
6.How does Aetrix verify that SK85C R7G is sourced from the original manufacturer or authorized distributors?
All SK85C R7G 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 SK85C R7G meets industry standards.
7.What is the process for return or replacement of SK85C R7G?
All SK85C R7G units undergo pre-shipment inspection (PSI). If there is an issue with SK85C R7G, 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 SK85C R7G part is unused and in its original packaging.
Return procedure for SK85C R7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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