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Taiwan Semiconductor Corporation SK85CHR7G
- Part No.:
- SK85CHR7G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK85CHR7G.pdf
- Description:
- DIODE SCHOTTKY 50V 8A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,731
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Product details
Overview
SK85CHR7G from Taiwan Semiconductor is an 8A, 50V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, featuring low forward voltage (0.75 V at 8 A, 25°C), high surge current capability (150 A), and junction temperature rating up to +150°C. It serves as a primary output rectifier in high-frequency switching power supplies.
For engineers reviewing the SK85CHR7G datasheet, SK85CHR7G pinout, SK85CHR7G application, or SK85CHR7G equivalent, this page delivers verified electrical parameters, thermal performance data, polarity marking details, JEDEC-compliant packaging, and real-world SMPS/adapter use context - all confirmed from Taiwan Semiconductor's official L2102 specification document.
Technical Context
This Schottky rectifier uses a single-die construction with guard ring structure for overvoltage protection and meets JESD201 Class 2 whisker resistance. Its 10,000 V/µs critical dV/dt rating supports fast-switching topologies without parasitic turn-on.
Thermal design is enabled by a typical junction-to-ambient thermal resistance of 20°C/W and moisture sensitivity level 1 (per J-STD-020), allowing standard reflow without dry-pack handling. The device operates across –55°C to +150°C junction range with matte tin-plated leads compliant to J-STD-002 solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse voltage; defines safe blocking capability in DC-DC or AC-DC secondary-side rectification |
| IF | 8 A - Continuous forward current rating; determines minimum heatsinking requirement at full load |
| IFSM | 150 A - Non-repetitive surge current (8.3 ms half-sine); enables robustness against line transients and startup inrush |
| VF @ 8A, 25°C | 0.75 V - Forward voltage drop; directly impacts conduction loss and efficiency in high-current SMPS outputs |
| IR @ 50V, 100°C | 10 mA - Reverse leakage at elevated temperature; affects standby power and thermal runaway risk in parallel configurations |
| RθJA | 20 °C/W - Junction-to-ambient thermal resistance; used to calculate temperature rise under PCB copper area constraints |
| TJ max | +150 °C - Maximum allowable junction temperature; permits operation in sealed or high-ambient industrial environments |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by band. Matte tin-plated leads, UL 94V-0 molding compound, 0.210 g weight.
| 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 | Marked by band; ties to output capacitor negative and ground plane; critical for EMI filtering path integrity |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents edge breakdown under transient overvoltage, improving reliability in unregulated or loosely coupled flyback designs |
| Moisture sensitivity level 1 | Eliminates baking requirement before SMT reflow, reducing manufacturing cost and process complexity |
| High dV/dt rating (10,000 V/µs) | Resists false triggering in high-di/dt synchronous rectifier or resonant converter applications |
| Halogen-free per IEC 61249-2-21 | Meets RoHS and environmental compliance mandates for export to EU, Japan, and North America |
Applications
| Server Power Supply Rectification | Laptop Adapter Output Stage |
|---|---|
Use Scenario: High-efficiency 48 V to 12 V intermediate bus conversion in 1U server PSUs operating at 200–500 kHz. IC Role / Device Role / Timing Role: Primary secondary-side freewheeling rectifier replacing conventional diodes to reduce conduction loss. Use Value: 0.75 V VF at 8 A lowers power dissipation by ~1.8 W vs. silicon diode, enabling higher density without forced air cooling. | Use Scenario: 19 V/4.74 A output stage in compact 90 W laptop AC-DC adapters with <15 mm height constraint. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback topology with synchronous control disabled. Use Value: DO-214AB footprint allows direct PCB replacement of legacy 8 A Schottkys while maintaining thermal margin at 50°C ambient. |
| LED Driver Secondary Rectification | Industrial DC-DC Converter Input Protection |
Use Scenario: Constant-current LED driver for street lighting with 36–48 V output and 700 mA–3 A load range. IC Role / Device Role / Timing Role: Isolation barrier rectifier delivering stable DC to constant-current regulator IC. Use Value: 10 mA IR at 100°C ensures minimal standby loss and no thermal runaway when driving long LED strings in outdoor enclosures. | Use Scenario: Input-stage reverse-polarity and surge protection in 24 V industrial DC-DC modules powering PLC I/O cards. IC Role / Device Role / Timing Role: Back-to-back configured as bidirectional clamp; absorbs 150 A surges from inductive load switching. Use Value: 150 A IFSM rating withstands repeated 24 V automotive-style load dump events without degradation. |
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-8EWH05FN-M3/45 | Same 8 A / 50 V rating, but TO-277 package (smaller footprint, lower RθJA = 15°C/W) | Preferred where board space is constrained and thermal performance is prioritized over legacy DO-214AB compatibility | Select if redesign allows smaller outline and tighter thermal budget; not drop-in compatible due to different pad layout |
| ON Semiconductor SB850 | Identical DO-214AB package and 8 A / 50 V rating, but VF = 0.72 V (typ) at 8 A - marginally lower conduction loss | Suitable for cost-sensitive consumer adapters where 30 mV VF reduction improves efficiency certification margin | Drop-in replacement with same marking polarity and JEDEC-compliant reflow profile; verify IR spec at 100°C (12 mA max) |
Compared with VS-8EWH05FN-M3/45 and SB850, SK85CHR7G offers guaranteed 150 A surge rating and guard ring protection - critical for industrial-grade reliability where transient immunity outweighs minor VF or footprint advantages.
Availability
SK85CHR7G is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, LED drivers, and industrial DC-DC converters requiring stable component supply, long-term lifecycle support, and RoHS/halogen-free compliance.
Supply support for SK85CHR7G 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, automotive, and industrial markets since 1979.
The SK8xC series was designed specifically for high-current, high-frequency rectification in compact, thermally demanding power supplies - emphasizing surge robustness, low VF consistency, and automated assembly readiness.
FAQ
What is the maximum junction temperature rating for SK85CHR7G?
The SK85CHR7G has a maximum junction temperature (TJ max) of +150°C, validated per its absolute maximum ratings table. This rating allows continuous operation in sealed industrial enclosures or high-ambient environments where thermal derating of competing 125°C-rated Schottkys would otherwise require oversized heatsinks. The SK85CHR7G maintains full 8 A current capability up to this limit when mounted on adequate copper area.
Does SK85CHR7G have a guard ring structure, and why does it matter?
Yes, SK85CHR7G incorporates a guard ring structure explicitly stated in its features list. This design prevents premature edge breakdown under transient overvoltage conditions - such as those occurring during MOSFET switching transitions or input line surges. In practice, this extends device lifetime in flyback and LLC converters where voltage overshoot exceeds nominal VRRM, making SK85CHR7G more robust than non-guarded Schottkys like some generic 50 V SMC parts.
What is the forward voltage of SK85CHR7G at 8 A and 25°C?
The forward voltage (VF) of SK85CHR7G is 0.75 V at IF = 8 A and TJ = 25°C, per the Electrical Specifications table. This value is measured under pulse test conditions (PW = 0.3 ms) and represents typical conduction loss in steady-state operation. At higher junction temperatures (e.g., 100°C), VF decreases slightly, but system-level efficiency calculations should use the 25°C value as worst-case for thermal design margining.
Is SK85CHR7G compatible with lead-free reflow processes?
Yes, SK85CHR7G is fully compatible with lead-free reflow processes. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its DO-214AB package is rated for peak reflow temperatures up to 260°C. With moisture sensitivity level 1 (per J-STD-020), no pre-baking is required - simplifying SMT line integration and eliminating yield loss from popcorning or delamination.
How is polarity marked on SK85CHR7G?
Polarity on SK85CHR7G is indicated by a cathode band printed on the body of the DO-214AB (SMC) package - consistent with industry-standard diode marking convention. The banded end corresponds to the cathode terminal, which must be connected toward the positive output rail in rectifier applications. This marking is visible under standard AOI inspection and aligns with the pinout diagram in Taiwan Semiconductor's L2102 datasheet revision.
SK85CHR7G 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
SK85CHR7G FAQ
1.How can I place an order for SK85CHR7G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK85CHR7G 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 SK85CHR7G reliable?
The price and inventory of SK85CHR7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK85CHR7G is usually 5 days.
3.What payment methods are accepted for SK85CHR7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK85CHR7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK85CHR7G?
SK85CHR7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK85CHR7G 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 SK85CHR7G?
For technical support, including SK85CHR7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK85CHR7G requirements.
6.How does Aetrix verify that SK85CHR7G is sourced from the original manufacturer or authorized distributors?
All SK85CHR7G 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 SK85CHR7G meets industry standards.
7.What is the process for return or replacement of SK85CHR7G?
All SK85CHR7G units undergo pre-shipment inspection (PSI). If there is an issue with SK85CHR7G, 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 SK85CHR7G part is unused and in its original packaging.
Return procedure for SK85CHR7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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