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Taiwan Semiconductor Corporation SK85CHM6G
- Part No.:
- SK85CHM6G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK85CHM6G.pdf
- Description:
- DIODE SCHOTTKY 50V 8A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,077
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Product details
Overview
SK85CHM6G 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 10,000 V/µs dV/dt rating-used in high-efficiency AC/DC adapters and DC-DC converters.
For engineers reviewing the SK85CHM6G datasheet, SK85CHM6G pinout, SK85CHM6G application, or SK85CHM6G equivalent, key selection criteria include repetitive peak reverse voltage (50V), thermal resistance (20°C/W), junction temperature range (–55°C to +150°C), moisture sensitivity level (J-STD-020 Level 1), and RoHS/halogen-free compliance.
Technical Context
This Schottky rectifier employs a single-die construction with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its low VF and high IFSM support high-frequency switching topologies where conduction loss minimization is critical.
Thermal performance is defined by a junction-to-ambient RθJA of 20°C/W under standard PCB mounting conditions. Reverse leakage remains ≤10 mA at 100°C and rated VR, enabling stable operation in thermally constrained power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum non-repetitive reverse blocking voltage; defines safe operating limit in flyback or boost diode positions |
| IF | 8 A - Continuous average forward current; determines heatsink sizing and trace width in 200–500 kHz SMPS designs |
| VF @ 8A, 25°C | 0.75 V - Forward voltage drop directly impacts conduction loss (Pcond ≈ 6 W at full load) |
| IFSM | 150 A - Peak non-repetitive surge current handling; supports cold-start inrush in offline adapters |
| dV/dt | 10,000 V/µs - Critical rate-of-rise immunity prevents false turn-on in high-dV/dt gate-drive or snubber circuits |
| TJ max | +150 °C - Maximum junction temperature; enables operation in sealed enclosures without active cooling |
| RθJA | 20 °C/W - Thermal resistance from junction to ambient on standard 1-in² copper pad; used for thermal margin calculation |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, polarity indicated by cathode band. Weight: 0.210 g. Molding compound meets UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter or secondary winding in flyback) |
| Cathode | Forward current exit point | Connected to output rail or filter capacitor; marked by visible band on body |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents edge breakdown at high reverse bias, improving reliability in transient-prone AC/DC front-ends |
| Moisture sensitivity level 1 | No floor life limitation or baking required before reflow-enables direct use from tape-and-reel |
| Halogen-free per IEC 61249-2-21 | Complies with environmental regulations for industrial and consumer end-equipment |
| JESD 201 Class 2 whisker resistance | Ensures long-term solder joint integrity under thermal cycling in automotive-grade power modules |
Applications
| AC/DC Adapters | LED Drivers |
|---|---|
Use Scenario: Secondary-side rectification in 12–24 V, 30–60 W wall adapters with <500 kHz switching frequency. IC Role / Device Role / Timing Role: Output rectifier replacing fast recovery diodes to reduce conduction loss and improve efficiency >90%. Use Value: 0.75 V VF at 8A lowers power dissipation by ~0.4 W vs. comparable 100V Si diode, reducing thermal stress on PCB. | Use Scenario: Constant-current output stage in isolated LED drivers for commercial lighting fixtures. IC Role / Device Role / Timing Role: Synchronous rectification element in flyback-derived topology delivering 350 mA–1 A output. Use Value: 150 A IFSM withstands LED string short-circuit transients without failure during factory test or field fault events. |
| DC-DC Converters | Industrial Power Supplies |
Use Scenario: Output rectification in 48 V input, 12 V/8 A telecom DC-DC modules operating at 300 kHz. IC Role / Device Role / Timing Role: Low-loss freewheeling path in synchronous buck or half-bridge LLC secondary. Use Value: 20°C/W RθJA allows operation at full load with ≤45°C case rise on 1-in² copper, eliminating need for thermal vias. | Use Scenario: Input rectification in 24 V/48 V industrial SMPS with wide ambient range (–40°C to +85°C). IC Role / Device Role / Timing Role: Primary-side clamp or auxiliary supply rectifier in multi-rail power distribution units. Use Value: –55°C to +150°C TJ range ensures functionality across extended temperature profiles without derating. |
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-85WQ05FN-M3/45 | Same 50 V VRRM, 8 A IF, but TO-277 package (lower RθJA = 15°C/W); VF = 0.72 V @ 8A | Requires different footprint and stencil; better thermal performance in space-constrained layouts | Select when board-level thermal management is prioritized over footprint compatibility |
| ON Semiconductor SB850 | 50 V VRRM, 8 A IF, DO-214AB package, VF = 0.78 V @ 8A, IFSM = 120 A, RθJA = 22°C/W | Lower surge rating and higher thermal resistance; suitable for non-critical surge environments | Select when cost sensitivity outweighs peak surge margin and thermal headroom |
Compared with VS-85WQ05FN-M3/45 and SB850, SK85CHM6G offers balanced surge robustness (150 A), industry-standard DO-214AB footprint, and verified halogen-free compliance-making it optimal for volume production of certified power supplies where layout reuse and regulatory alignment are essential.
Availability
SK85CHM6G is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and industrial DC-DC converters requiring stable component supply, J-STD-020 Level 1 handling, and RoHS-compliant sourcing.
Supply support for SK85CHM6G 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 and protection markets since 1979.
The SK8xC series targets high-efficiency, surface-mount power rectification in cost-sensitive, high-volume power conversion systems-including consumer adapters, lighting, and industrial SMPS-emphasizing reliability, thermal robustness, and regulatory compliance.
FAQ
What is the maximum junction temperature rating for SK85CHM6G?
The SK85CHM6G has a maximum junction temperature (TJ) of +150°C, validated per absolute maximum ratings in the official TSC datasheet. This rating allows uninterrupted operation in sealed enclosures or high-ambient environments up to +85°C case temperature when properly mounted on ≥1-in² copper. The SK85CHM6G maintains stable reverse leakage (<10 mA) at this limit, supporting long-term reliability in industrial power supplies.
Does SK85CHM6G meet RoHS and halogen-free requirements?
Yes, SK85CHM6G is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the TSC product documentation. The molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. These certifications are verified for all production lots and support compliance in EU CE-marked and Japan J-Moss–regulated end equipment.
What is the forward voltage of SK85CHM6G at 8A and 100°C junction temperature?
The forward voltage of SK85CHM6G is not specified at 100°C in the official TSC datasheet. At 25°C and 8A, VF is 0.75 V (max). While typical VF decreases slightly with rising temperature in Schottky devices, the datasheet only guarantees VF ≤ 0.75 V at 25°C and does not provide a derated value at 100°C. Designers should use the 25°C value with appropriate thermal margin or consult TSC's application engineering for characterization data.
Is SK85CHM6G pin-compatible with other SK8xC family members?
Yes, SK85CHM6G shares identical DO-214AB (SMC) package dimensions, anode/cathode terminal layout, and polarity marking (cathode band) with all SK8xC variants (SK82C–SK810C). This enables direct substitution within the same voltage grade group-e.g., SK84C (40V) or SK86C (60V)-provided the VRRM requirement is met. No PCB redesign is needed when swapping within the SK8xC family.
What is the moisture sensitivity level (MSL) and reflow profile guidance for SK85CHM6G?
SK85CHM6G is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow. It is qualified for standard Pb-free reflow profiles with peak temperature ≤260°C and time above 217°C of 60–150 seconds. The matte tin-plated leads ensure solderability per J-STD-002, and the UL 94V-0 molding compound withstands repeated thermal cycles without delamination.
SK85CHM6G 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK85CHM6G FAQ
1.How can I place an order for SK85CHM6G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK85CHM6G 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 SK85CHM6G reliable?
The price and inventory of SK85CHM6G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK85CHM6G is usually 5 days.
3.What payment methods are accepted for SK85CHM6G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK85CHM6G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK85CHM6G?
SK85CHM6G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK85CHM6G 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 SK85CHM6G?
For technical support, including SK85CHM6G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK85CHM6G requirements.
6.How does Aetrix verify that SK85CHM6G is sourced from the original manufacturer or authorized distributors?
All SK85CHM6G 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 SK85CHM6G meets industry standards.
7.What is the process for return or replacement of SK85CHM6G?
All SK85CHM6G units undergo pre-shipment inspection (PSI). If there is an issue with SK85CHM6G, 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 SK85CHM6G part is unused and in its original packaging.
Return procedure for SK85CHM6G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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