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Taiwan Semiconductor Corporation SK84CHR7G
- Part No.:
- SK84CHR7G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK84CHR7G.pdf
- Description:
- DIODE SCHOTTKY 40V 8A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,157
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Product details
Overview
SK84CHR7G from Taiwan Semiconductor is a single-die, 40 V repetitive peak reverse voltage Schottky barrier rectifier in DO-214AB (SMC) package, rated for 8 A average forward current and 150 A non-repetitive surge current, with 0.55 V typical forward voltage at 8 A and 25°C - used in high-efficiency AC/DC adapters and DC/DC converters.
For engineers reviewing the SK84CHR7G datasheet, SK84CHR7G pinout, SK84CHR7G application, or SK84CHR7G equivalent, key selection criteria include VRRM = 40 V, IF = 8 A, VF ≤ 0.55 V @ 8 A, IR ≤ 0.5 mA @ 25°C, and DO-214AB thermal resistance RθJA = 20°C/W - critical for thermal design in compact power supplies.
Technical Context
This Schottky rectifier uses a planar junction structure 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 in SMPS designs where conduction loss minimization is essential.
Rated for TJ = –55°C to +125°C operation (with derating above 25°C), it features moisture sensitivity level 1 per J-STD-020 and meets UL 94V-0 flammability and IEC 61249-2-21 halogen-free requirements - suitable for industrial-grade power conversion modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - maximum reverse blocking voltage before breakdown; defines usable input range in 36 V nominal bus applications |
| IF(AV) | 8 A - continuous DC forward current rating; determines minimum heatsink sizing in 60–100 W adapter designs |
| IFSM | 150 A - peak non-repetitive surge current (8.3 ms half-sine); withstands inrush during cold-start of offline converters |
| VF @ 8 A, 25°C | 0.55 V typ - low conduction loss enables >92% efficiency in 12 V output buck converters at full load |
| IR @ 40 V, 25°C | 0.5 mA max - minimal leakage preserves standby power in energy-efficient adapters meeting Level VI standards |
| RθJA | 20 °C/W - junction-to-ambient thermal resistance on standard 1-in² copper pad; enables 2.5 W dissipation at ΔT = 50°C |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode-indicated by band, matte tin-plated leads, 0.210 g weight, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry node | Connected to input-side switch node (e.g., MOSFET drain) in synchronous rectification or freewheeling path |
| Cathode | Forward current exit node / reverse voltage reference | Connected to output rail; polarity band must align with PCB silkscreen to prevent reverse bias failure |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring overvoltage protection | Enhances ruggedness against transient voltage spikes in unregulated input stages without external clamping |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; supports standard SMT assembly without process modification |
| High surge current capability (150 A) | Survives repeated cold-start events in 100 W+ laptop adapters without degradation |
| Halogen-free & RoHS-compliant | Meets EU environmental directives and IPC-J-STD-020 material compliance for global OEM shipments |
Applications
| Laptop AC/DC Adapter | Industrial DC/DC Converter |
|---|---|
Use Scenario: 65 W universal-input offline flyback adapter powering 20 V USB-C PD devices. IC Role / Device Role / Timing Role: Output rectifier replacing fast recovery diode to reduce conduction loss and improve light-load efficiency. Use Value: 0.55 V VF cuts rectifier loss by ~40% vs. 1.1 V Si diode, enabling 91% peak efficiency and <150 mW no-load consumption. | Use Scenario: 48 V input to 12 V isolated half-bridge converter in factory automation I/O module. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in synchronous rectified LLC resonant topology. Use Value: 150 A IFSM handles startup surges from large output capacitors; DO-214AB footprint allows direct replacement of legacy SMC packages. |
| LED Driver Power Supply | Telecom PoE Midspan |
Use Scenario: Constant-current LED driver for outdoor signage operating from 24 V DC input with PWM dimming. IC Role / Device Role / Timing Role: Input rectifier in boost PFC stage feeding constant-current buck regulator. Use Value: Low IR (≤0.5 mA) prevents standby current drift; 40 V VRRM safely accommodates 24 V ±15% line transients. | Use Scenario: Auxiliary power supply in IEEE 802.3at PoE midspan delivering 30 W to remote IP cameras. IC Role / Device Role / Timing Role: Output rectifier in active clamp forward converter supplying 12 V control rail. Use Value: 20°C/W RθJA enables natural convection cooling in sealed enclosure; halogen-free construction meets telecom flame safety specs. |
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 | Same DO-214AB package, 40 V VRRM, 8 A IF, but VF = 0.57 V typ @ 8 A; slightly higher RθJA = 22°C/W | Identical use in adapters; marginally lower efficiency at full load due to higher VF | Preferred where Vishay supply chain alignment is required; verify thermal margin with layout |
| ON Semiconductor SB840 | DO-214AB, 40 V VRRM, 8 A IF, VF = 0.54 V typ @ 8 A, but IR = 1.0 mA max @ 25°C - double the leakage | Suitable for non-critical standby power; not recommended for Level VI-compliant designs | Select when lowest VF is priority and leakage tolerance >0.5 mA; confirm IR impact on no-load regulation |
Compared with VS-8EWH04FN-M3 and SB840, SK84CHR7G offers the best balance of low VF (0.55 V), low IR (0.5 mA), and industry-standard thermal resistance (20°C/W), making it optimal for space-constrained, high-efficiency 65–100 W power supplies requiring long-term reliability.
Availability
SK84CHR7G is available at Aetrix Electronics and suitable for laptop adapters, industrial DC/DC converters, LED drivers, and PoE midspan power supplies requiring stable component supply and full RoHS/halogen-free compliance.
Supply support for SK84CHR7G 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 management and industrial markets since 1979.
The SK8xC series was designed specifically for high-efficiency, surface-mount Schottky rectification in compact AC/DC and DC/DC power supplies - emphasizing low VF, robust surge handling, and JEDEC-compliant packaging for automated manufacturing.
FAQ
What is the maximum junction temperature rating for SK84CHR7G?
The SK84CHR7G has a maximum junction temperature (TJ) rating of +125°C under continuous operation. This limit applies across its full rated current range and requires appropriate PCB copper area to maintain thermal resistance at or below 20°C/W. Exceeding this temperature risks irreversible parametric shift and reduced long-term reliability. The device also supports storage up to +150°C, but operational derating begins above 25°C ambient.
Does SK84CHR7G meet RoHS and halogen-free requirements?
Yes, SK84CHR7G is fully RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. These specifications are verified per TSC's L2102 revision documentation and confirmed on official Taiwan Semiconductor product change notices and distributor datasheets.
What is the marking code printed on the SK84CHR7G device body?
The SK84CHR7G is marked with "SK84C" on the device body, followed by a green compound indicator ("G"), date code ("YW"), and factory code ("F"). The "R7G" suffix in the ordering code denotes tape-and-reel packaging (3,000 units per reel) and green compound - not a functional variant. The visible marking remains "SK84C" for identification during visual inspection and AOI.
Can SK84CHR7G replace SK83C or SK85C in an existing design?
SK84CHR7G can replace SK83C (30 V VRRM) only if the circuit's peak reverse voltage stays below 30 V - otherwise risk of avalanche failure. It cannot directly replace SK85C (50 V VRRM) in 48 V systems where 50 V headroom is required. While pin-compatible and same-package, VRRM mismatch makes substitution unsafe without circuit-level validation of worst-case reverse stress conditions.
What is the surge current rating of SK84CHR7G and how is it tested?
SK84CHR7G is rated for 150 A peak non-repetitive forward surge current (IFSM), tested per JEDEC standard using an 8.3 ms single half-sine waveform superimposed on rated DC load. This rating reflects capability to survive inrush currents during cold-start of offline power supplies with large bulk capacitors, provided the junction temperature remains within safe limits and surge duty cycle is infrequent.
SK84CHR7G 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
SK84CHR7G FAQ
1.How can I place an order for SK84CHR7G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK84CHR7G 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 SK84CHR7G reliable?
The price and inventory of SK84CHR7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK84CHR7G is usually 5 days.
3.What payment methods are accepted for SK84CHR7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK84CHR7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK84CHR7G?
SK84CHR7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK84CHR7G 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 SK84CHR7G?
For technical support, including SK84CHR7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK84CHR7G requirements.
6.How does Aetrix verify that SK84CHR7G is sourced from the original manufacturer or authorized distributors?
All SK84CHR7G 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 SK84CHR7G meets industry standards.
7.What is the process for return or replacement of SK84CHR7G?
All SK84CHR7G units undergo pre-shipment inspection (PSI). If there is an issue with SK84CHR7G, 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 SK84CHR7G part is unused and in its original packaging.
Return procedure for SK84CHR7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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