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Taiwan Semiconductor Corporation SK84CHM6G
- Part No.:
- SK84CHM6G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK84CHM6G.pdf
- Description:
- DIODE SCHOTTKY 40V 8A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,498
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Product details
Overview
SK84CHM6G from Taiwan Semiconductor is an 8A, 40V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, featuring low forward voltage (0.55 V at 8 A, 25°C), high surge current capability (150 A), and junction temperature rating up to +125°C. It serves as a primary output rectifier in high-efficiency AC/DC adapters and DC/DC converters.
For engineers reviewing the SK84CHM6G datasheet, SK84CHM6G pinout, SK84CHM6G application, or SK84CHM6G equivalent, key selection criteria include repetitive peak reverse voltage (40 V), forward voltage drop under load, thermal resistance (20 °C/W), surge robustness, and RoHS/halogen-free compliance for industrial power supply designs.
Technical Context
This Schottky rectifier uses a single-die construction with guard ring structure to enhance overvoltage ruggedness and suppress leakage under high-temperature bias. Its low VF and high IFSM support high-frequency switching topologies where conduction loss and transient reliability are critical.
The device operates across –55°C to +125°C junction range, with moisture sensitivity level 1 (per J-STD-020), matte tin-plated leads compliant with J-STD-002, and UL 94V-0 molding compound - enabling direct use in automated SMT lines without baking or special handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or forward converter secondary side |
| IF | 8 A continuous - Rated average forward current at TC = 75°C; determines heatsink sizing in 25–100 kHz SMPS designs |
| VF @ 8A, 25°C | 0.55 V - Low conduction loss enables >92% efficiency in 12 V/5 A adapter outputs |
| IFSM | 150 A - Peak non-repetitive surge current (8.3 ms half-sine); withstands inrush and fault transients without failure |
| RθJA | 20 °C/W - Junction-to-ambient thermal resistance on standard 1-in² copper pad; supports derating to 5.5 A at 100°C ambient |
| TJ max | +125 °C - Maximum junction temperature; sets upper limit for thermal design margin in enclosed power supplies |
| IR @ 40 V, 100°C | 15 mA - Reverse leakage at elevated temperature; impacts standby power in energy-efficient designs |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode-indicated by band. Weight: 0.210 g. Molding compound: UL 94V-0 rated. Leads: Matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current terminal | Connected to transformer secondary or switch node; must handle full 8 A RMS and 150 A surge |
| Cathode | Output current terminal | Feeds output capacitor and load; polarity marked by visible band; low-inductance layout required |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Improves dv/dt immunity (10,000 V/µs) and prevents premature avalanche breakdown during voltage transients |
| Low VF at high IF | 0.55 V at 8 A reduces conduction losses by ~30% vs. comparable 45 V Si diodes, lowering thermal stress |
| MSL Level 1 | Zero bake requirement before reflow; compatible with standard JEDEC J-STD-020 profile for high-yield SMT assembly |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive; suitable for consumer and industrial end-equipment certification |
Applications
| AC/DC Adapters | LED Drivers |
|---|---|
Use Scenario: 12 V / 5 A wall-mounted power adapter for networking equipment. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback topology, conducting during transformer reset phase. Use Value: 0.55 V VF minimizes heat generation in compact enclosure; 150 A IFSM absorbs line surge events without degradation. | Use Scenario: Constant-current LED driver for commercial downlights (24 V input, 350 mA × 12 strings). IC Role / Device Role / Timing Role: Secondary-side synchronous rectification replacement in isolated buck-boost stage. Use Value: Low forward drop maintains >90% system efficiency at full load; DO-214AB footprint allows direct PCB reuse from prior Si diode designs. |
| Industrial DC/DC Converters | USB PD Power Delivery Modules |
Use Scenario: 48 V input to 12 V/10 A isolated converter for factory automation I/O modules. IC Role / Device Role / Timing Role: Main output rectifier in active-clamp forward converter, switching at 200 kHz. Use Value: 20 °C/W RθJA enables operation at 75°C ambient without forced air; guard ring ensures reliability under bus voltage transients. | Use Scenario: 20 V PPS output stage in 65 W USB-C PD charger with dual-port negotiation. IC Role / Device Role / Timing Role: Secondary-side freewheeling rectifier in synchronous rectified LLC resonant converter. Use Value: 15 mA IR at 100°C limits no-load power draw below 30 mW, supporting Energy Star Tier 2 compliance. |
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-8EWH04FN-M3/45 | Same 40 V VRRM, 8 A IF, but TO-277 package (lower RθJA = 15 °C/W); VF = 0.54 V @ 8 A | Requires different pad layout; better thermal performance but larger footprint | Select when board space permits and junction temperature must stay below 110°C at full load |
| ON Semiconductor SB840-E3/45 | 40 V VRRM, 8 A IF, DO-214AB package, VF = 0.57 V @ 8 A, IR = 20 mA @ 100°C | Identical footprint and mounting; slightly higher VF and leakage than SK84CHM6G | Use as drop-in alternative where minor efficiency trade-off is acceptable and second-source qualification is required |
Compared with VS-8EWH04FN-M3/45 and SB840-E3/45, the SK84CHM6G offers optimal balance of low VF (0.55 V), industry-standard DO-214AB compatibility, and proven surge robustness - making it preferred for cost-sensitive, high-volume adapter and converter designs where thermal headroom and layout continuity are prioritized.
Availability
SK84CHM6G is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and industrial DC/DC converters requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for SK84CHM6G 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, specializing in power rectifiers, TVS devices, and MOSFETs for industrial and consumer markets.
The SK82C–SK810C series was developed specifically for high-efficiency, high-reliability secondary-side rectification in compact switching power supplies - emphasizing low VF, surge tolerance, and automated assembly readiness.
FAQ
What is the maximum junction temperature rating for SK84CHM6G?
The SK84CHM6G has a maximum junction temperature (TJ max) of +125°C, verified per absolute maximum ratings table in the official TSC datasheet L2102. This rating applies under continuous DC or PWM forward conduction conditions with proper PCB thermal relief. Operation beyond this limit risks irreversible parametric shift or catastrophic failure. Derating curves in Figure 1 confirm usable current drops to ~5.5 A at 100°C ambient on standard FR4 with 1-in² copper.
Is SK84CHM6G RoHS and halogen-free compliant?
Yes, SK84CHM6G is fully RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the "Features" section of the TSC SK82C–SK810C datasheet (Version L2102). The molding compound contains no brominated flame retardants, and lead content is below 1000 ppm. Certificate of Compliance is available upon request from Aetrix Electronics.
What does the 'HM6G' suffix in SK84CHM6G indicate?
The 'HM6G' suffix in SK84CHM6G denotes Taiwan Semiconductor's internal packaging and environmental coding: 'H' = halogen-free compound, 'M6' = DO-214AB (SMC) package with matte tin leads, and 'G' = green compound (RoHS-compliant). This matches TSC's standardized ordering nomenclature documented in the "Ordering Information" section of the L2102 datasheet.
Can SK84CHM6G replace SK84C in existing designs?
Yes, SK84CHM6G is a direct replacement for SK84C - both share identical electrical specifications (40 V VRRM, 8 A IF, 0.55 V VF), DO-214AB package dimensions, and marking layout. The 'HM6G' variant adds halogen-free and enhanced MSL Level 1 compliance, with no change to thermal or electrical behavior. No PCB or firmware modifications are required for migration.
What is the reverse leakage current of SK84CHM6G at 100°C?
At rated reverse voltage (40 V) and junction temperature of 100°C, the SK84CHM6G exhibits a maximum reverse leakage current (IR) of 15 mA, as specified in the "Electrical Specifications" table of the L2102 datasheet. This value is measured using a 30 ms pulse test and reflects worst-case behavior under sustained high-temperature operation in enclosed power supplies.
SK84CHM6G 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):
- 40 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SK84CHM6G FAQ
1.How can I place an order for SK84CHM6G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK84CHM6G 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 SK84CHM6G reliable?
The price and inventory of SK84CHM6G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK84CHM6G is usually 5 days.
3.What payment methods are accepted for SK84CHM6G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK84CHM6G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK84CHM6G?
SK84CHM6G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK84CHM6G 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 SK84CHM6G?
For technical support, including SK84CHM6G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK84CHM6G requirements.
6.How does Aetrix verify that SK84CHM6G is sourced from the original manufacturer or authorized distributors?
All SK84CHM6G 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 SK84CHM6G meets industry standards.
7.What is the process for return or replacement of SK84CHM6G?
All SK84CHM6G units undergo pre-shipment inspection (PSI). If there is an issue with SK84CHM6G, 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 SK84CHM6G part is unused and in its original packaging.
Return procedure for SK84CHM6G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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