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Taiwan Semiconductor Corporation SK35B M4G
- Part No.:
- SK35B M4G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK35B M4G.pdf
- Description:
- DIODE SCHOTTKY 50V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,930
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Product details
Overview
SK35B M4G from Taiwan Semiconductor is a 3A, 50V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring 0.75V max forward voltage at 3A and 100µA max reverse current at 25°C, optimized for high-efficiency switching mode power supplies and DC-DC converters.
For engineers reviewing the SK35B M4G datasheet, SK35B M4G pinout, SK35B M4G application, or SK35B M4G equivalent, key selection criteria include its 50V VRRM, 70A IFSM, 150°C max junction temperature, thermal resistance (RθJL = 23°C/W), and SMB package compatibility with automated SMT assembly.
Technical Context
The SK35B M4G is a single-die, unidirectional Schottky rectifier designed for low-loss DC output rectification in medium-power switching applications. Its guard ring structure provides overvoltage protection, and it meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 requirements.
It operates across -55°C to +150°C junction temperature range with 10,000 V/µs critical dV/dt rating, enabling robust performance in fast-switching topologies. The device uses matte tin-plated leads compliant with J-STD-002 solderability standards and UL 94V-0 molded compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in rectifier circuits. |
| IF | 3 A - Continuous average forward current; supports stable operation in 3A-output SMPS designs. |
| VF (max) | 0.75 V @ 3A, 25°C - Low conduction loss enables >92% efficiency in 5–12V output stages. |
| IFSM | 70 A - Non-repetitive surge capability; withstands inrush and transient overloads without failure. |
| RθJL | 23 °C/W - Junction-to-lead thermal resistance; enables direct PCB copper pour heatsinking in compact layouts. |
| TJ (max) | +150 °C - Extended junction temperature rating allows use in thermally constrained industrial enclosures. |
| IR (max) | 100 µA @ 50V, 25°C - Low leakage preserves standby power budget in energy-sensitive adapters. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount plastic case with cathode band polarity indicator; dimensions 4.60 × 3.95 × 2.00 mm (L × W × H); weight ≈ 0.100 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/switching node side of rectifier; requires low-inductance trace routing. |
| Cathode | Forward current exit point | Connected to output filter capacitor; marked by visible band; carries full load current to output rail. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against transient overvoltage events without derating VRRM. |
| Low VF (0.75 V) | Reduces conduction losses by ~40% vs. comparable 50V silicon diodes, lowering thermal stress. |
| MSL Level 1 | Enables unlimited floor life and reflow compatibility without baking prior to assembly. |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing compliance. |
Applications
| AC-DC Adapters | Industrial DC-DC Converters |
|---|---|
Use Scenario: 12V/3A wall adapter for IoT gateways and network equipment. IC Role / Device Role / Timing Role: Output rectifier in flyback secondary-side synchronous or Schottky configuration. Use Value: 0.75V VF minimizes heat generation in sealed plastic housings, extending reliability beyond 50,000 hours MTBF. | Use Scenario: 24V intermediate bus converter in programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: Primary output rectifier handling continuous 3A load with 150°C ambient tolerance. Use Value: 150°C TJ rating and 23°C/W RθJL allow operation without forced air cooling in DIN-rail mounted enclosures. |
| Led Driver Power Supplies | Automotive Aftermarket Electronics |
Use Scenario: Constant-current LED driver for commercial signage with 50V string voltage. IC Role / Device Role / Timing Role: Secondary-side freewheeling/rectifying diode in buck-derived topology. Use Value: 100µA IR at 25°C ensures minimal standby current drain during dimming-off states. | Use Scenario: 12V auxiliary power supply in vehicle-mounted infotainment display units. IC Role / Device Role / Timing Role: Input rectifier in isolated DC-DC module accepting wide-range automotive input (9–16V). Use Value: 70A IFSM withstands cold-crank transients (up to 60V/10ms) 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 |
|---|---|---|---|
| SS35H (ON Semiconductor) | Same 50V VRRM, 3A IF, but VF = 0.72V typ (vs. 0.75V max for SK35B M4G); SMB package, MSL Level 1. | Slightly lower conduction loss; identical thermal and surge ratings; validated in automotive-grade reference designs. | Preferred where <0.73V typical VF is required for ultra-low-loss optimization. |
| SB350 (Vishay) | 50V VRRM, 3A IF, VF = 0.72V max, but TJ max = 125°C (vs. 150°C for SK35B M4G); same SMB footprint. | Limited to lower ambient temperature environments; not rated for 150°C continuous operation. | Select when board-level thermal management ensures TJ ≤ 125°C and cost sensitivity outweighs extended temperature margin. |
Compared with SS35H and SB350, the SK35B M4G offers the highest junction temperature rating (+150°C) and guaranteed VF ≤ 0.75V - making it optimal for thermally aggressive industrial and enclosed adapter applications where long-term reliability under sustained load is critical.
Availability
SK35B M4G is available at Aetrix Electronics and suitable for AC-DC adapters, industrial DC-DC converters, LED driver power supplies, and automotive aftermarket electronics requiring stable component supply and full RoHS/halogen-free compliance.
Supply support for SK35B M4G 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q200 qualified product lines.
The SK32B–SK320B family was developed specifically for high-efficiency, surface-mount rectification in cost-sensitive yet thermally demanding power conversion systems - emphasizing low VF, rugged surge capability, and automated assembly readiness.
FAQ
What is the maximum junction temperature rating for the SK35B M4G?
The SK35B M4G has a maximum junction temperature (TJ) rating of +150°C, verified per TSC's P2212 datasheet revision. This allows reliable operation in high-ambient environments such as enclosed power adapters or industrial control cabinets without active cooling. The SK35B M4G maintains specified electrical parameters up to this limit when thermal design respects its RθJL = 23°C/W rating.
Does the SK35B M4G have a halogen-free construction?
Yes, the SK35B M4G conforms to IEC 61249-2-21 for halogen-free materials and is RoHS compliant per EU Directive 2011/65/EU. The molding compound contains no brominated flame retardants or chlorine-based additives, and all plating meets JEDEC J-STD-002 solderability requirements. This makes the SK35B M4G suitable for green manufacturing programs and export to regulated markets.
What is the forward voltage specification for the SK35B M4G at rated current?
The SK35B M4G specifies a maximum forward voltage (VF) of 0.75 V at IF = 3 A and TJ = 25°C, per the "ELECTRICAL SPECIFICATIONS" table in the official TSC P2212 datasheet. This value is measured under pulse conditions (PW = 0.3 ms), ensuring repeatability. At higher junction temperatures (e.g., 100°C), VF decreases slightly, improving conduction efficiency in warm operating conditions.
Is the SK35B M4G compatible with lead-free reflow soldering processes?
Yes, the SK35B M4G is qualified for lead-free reflow soldering per J-STD-020, with Moisture Sensitivity Level (MSL) 1 - meaning unlimited floor life and no baking required before assembly. Its matte tin-plated leads meet J-STD-002 requirements, and the UL 94V-0 package withstands peak reflow temperatures up to 260°C for 10 seconds. The SK35B M4G is fully compatible with standard Pb-free SAC305 profiles.
What does the "M4G" suffix indicate in SK35B M4G?
The "M4G" suffix in SK35B M4G denotes Taiwan Semiconductor's standardized packaging and environmental coding: "M" indicates tape-and-reel packaging (3,000 pcs/reel), "4" specifies DO-214AA (SMB) package variant, and "G" confirms halogen-free and RoHS-compliant construction. This coding aligns with TSC's internal ordering nomenclature documented in the "ORDERING INFORMATION" section of the SK32B–SK320B datasheet (P2212).
SK35B M4G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 750 mV @ 3 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-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK35B M4G FAQ
1.How can I place an order for SK35B M4G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK35B M4G 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 SK35B M4G reliable?
The price and inventory of SK35B M4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK35B M4G is usually 5 days.
3.What payment methods are accepted for SK35B M4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK35B M4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK35B M4G?
SK35B M4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK35B M4G 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 SK35B M4G?
For technical support, including SK35B M4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK35B M4G requirements.
6.How does Aetrix verify that SK35B M4G is sourced from the original manufacturer or authorized distributors?
All SK35B M4G 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 SK35B M4G meets industry standards.
7.What is the process for return or replacement of SK35B M4G?
All SK35B M4G units undergo pre-shipment inspection (PSI). If there is an issue with SK35B M4G, 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 SK35B M4G part is unused and in its original packaging.
Return procedure for SK35B M4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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