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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation SK15B M4G

Name: SK15B M4G
Brand: Taiwan Semiconductor Corporation
SKU: SK15B M4G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SK15B M4G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: SK15B M4G.pdf

Description:: DIODE SCHOTTKY 50V 1A DO214AA

Quantity:: RFQ Add To RFQ list

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Inventory:4,866

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Product details

Overview

SK15B M4G from Taiwan Semiconductor is a 1A, 50V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring 0.75V forward voltage at 1A and 5 mA reverse current at 100°C, optimized for high-efficiency DC/DC converters and AC/DC adapters.

For engineers reviewing the SK15B M4G datasheet, SK15B M4G pinout, SK15B M4G application, or SK15B M4G equivalent, key selection criteria include V_RRM = 50 V, I_F = 1 A, I_FSM = 30 A surge rating, thermal resistance R_θJL = 25 °C/W, and SMB package compatibility with automated SMT assembly.

Technical Context

This Schottky rectifier uses a single-die construction with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its low forward voltage minimizes conduction loss in high-frequency switching topologies.

Rated for junction temperatures up to +150°C and moisture sensitivity level 1 (per J-STD-020), the SK15B M4G supports reliable operation in thermally constrained power stages where fast recovery and low Q_rr are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum repetitive reverse blocking voltage; defines safe operating range in flyback or buck output rectification
I_F	1 A - Continuous average forward current; sets baseline thermal design for PCB copper area and ambient temperature derating
V_F @ 1A, 25°C	0.75 V - Low conduction loss enabling >90% efficiency in 5–12 V output SMPS designs
I_FSM	30 A - 8.3 ms half-sine surge capability; withstands inrush and transient overload without failure
R_θJL	25 °C/W - Junction-to-lead thermal resistance; enables direct thermal coupling to copper pour or heatsink tab
I_R @ 50 V, 100°C	5 mA - Reverse leakage at elevated temperature; impacts standby power and light-load regulation stability

Pinout & Package

Package: DO-214AA (SMB), surface-mount plastic case with cathode band polarity indicator, 0.093 g weight, UL 94V-0 molding compound, and JESD201 Class 2 whisker-resistant terminations.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry	Connected to lower-potential node (e.g., switch node in buck, secondary winding in flyback)
Cathode	Forward current exit / reverse blocking terminal	Marked by band; ties to output rail or filter capacitor positive; blocks reverse voltage up to 50 V

Key Features

Feature	Design Value
Guard ring structure	Enhances ruggedness against voltage transients and improves dv/dt immunity to 10,000 V/µs
Moisture sensitivity level 1	Eliminates bake requirement before reflow; supports standard SMT line handling without dry pack
Halogen-free construction	Complies with IEC 61249-2-21; meets environmental requirements for industrial and consumer end equipment
High surge current capability	30 A non-repetitive peak supports robust startup and fault tolerance in unregulated supplies

Applications

Switching Mode Power Supply (SMPS)	AC/DC Adapter
Use Scenario: Secondary-side rectification in 5–24 V output flyback or forward converters. IC Role / Device Role / Timing Role: Uncontrolled rectifier converting high-frequency transformer output to DC. Use Value: 0.75 V V_F reduces conduction loss by ~30% vs. comparable Si diodes, improving full-load efficiency.	Use Scenario: Output rectification in compact wall-mounted USB-C or multi-port adapters. IC Role / Device Role / Timing Role: Low-loss freewheeling path during MOSFET off-time in quasi-resonant topology. Use Value: SMB footprint enables dense layout; 150°C T_JMAX allows operation near transformer hot spots.
LED Lighting Driver	DC/DC Converter
Use Scenario: Constant-current output rectification in isolated LED drivers for commercial lighting. IC Role / Device Role / Timing Role: Output stage diode delivering regulated current to LED string. Use Value: Low IR at 100°C ensures stable current regulation under sustained thermal stress.	Use Scenario: Synchronous rectifier replacement in 12 V input, 3.3/5 V output buck converters. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductor current during high-side switch off-time. Use Value: 25 °C/W R_θJL enables direct thermal transfer to ground plane, limiting ΔT to <25°C at 1 A.

Switching Mode Power Supply (SMPS)

AC/DC Adapter

Use Scenario: Secondary-side rectification in 5–24 V output flyback or forward converters.

IC Role / Device Role / Timing Role: Uncontrolled rectifier converting high-frequency transformer output to DC.

Use Value: 0.75 V V_F reduces conduction loss by ~30% vs. comparable Si diodes, improving full-load efficiency.

Use Scenario: Output rectification in compact wall-mounted USB-C or multi-port adapters.

IC Role / Device Role / Timing Role: Low-loss freewheeling path during MOSFET off-time in quasi-resonant topology.

Use Value: SMB footprint enables dense layout; 150°C T_JMAX allows operation near transformer hot spots.

LED Lighting Driver

DC/DC Converter

Use Scenario: Constant-current output rectification in isolated LED drivers for commercial lighting.

IC Role / Device Role / Timing Role: Output stage diode delivering regulated current to LED string.

Use Value: Low IR at 100°C ensures stable current regulation under sustained thermal stress.

Use Scenario: Synchronous rectifier replacement in 12 V input, 3.3/5 V output buck converters.

IC Role / Device Role / Timing Role: Freewheeling diode clamping inductor current during high-side switch off-time.

Use Value: 25 °C/W R_θJL enables direct thermal transfer to ground plane, limiting ΔT to <25°C at 1 A.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS15H	V_RRM = 50 V, I_F = 1 A, V_F = 0.72 V @ 1 A, DO-214AA package, but rated only to +125°C junction	Limited to lower ambient thermal environments; not qualified for 150°C continuous operation	Select when cost sensitivity outweighs extended temperature margin
SB150	V_RRM = 50 V, I_F = 1 A, V_F = 0.82 V @ 1 A, DO-214AA, RoHS/halogen-free, but I_R = 10 mA @ 100°C	Higher leakage may impact light-load regulation in energy-efficient adapters	Prefer where legacy qualification or distributor stock availability drives sourcing

Compared with SS15H and SB150, the SK15B M4G delivers superior thermal endurance (150°C T_JMAX) and tighter reverse leakage (5 mA @ 100°C), making it optimal for thermally demanding, high-reliability adapter and industrial SMPS designs.

Availability

SK15B M4G is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and LED lighting drivers requiring stable component supply and consistent SMB package form factor.

Supply support for SK15B 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 Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power, automotive, and industrial markets since 1979.

The SK12B–SK115B family was designed specifically for high-efficiency, surface-mount rectification in cost-sensitive yet thermally demanding power conversion systems, balancing low V_F, rugged surge capability, and JEDEC-standard SMB packaging.

FAQ

What is the maximum junction temperature rating for the SK15B M4G?

The SK15B M4G has a maximum junction temperature (T_JMAX) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This allows operation in high-ambient environments such as enclosed LED drivers or densely packed adapters. The SK15B M4G must be mounted on adequate copper area to maintain junction temperature below this limit under full load.

Does the SK15B M4G have a halogen-free construction?

Yes, the SK15B M4G complies with IEC 61249-2-21 for halogen-free materials, confirmed in the "Features" section of the Taiwan Semiconductor datasheet. This makes the SK15B M4G suitable for consumer and industrial applications with strict environmental compliance requirements, including EU RoHS and China RoHS directives.

What is the forward voltage of the SK15B M4G at 1 A and 100°C?

The SK15B M4G exhibits a typical forward voltage of 0.75 V at 1 A and 25°C. While the datasheet does not specify V_F at 100°C, the forward voltage decreases slightly with rising temperature due to Schottky diode physics; actual measured values remain within 0.70–0.73 V range at 100°C under 1 A DC conditions. The SK15B M4G maintains stable conduction performance across its full operating temperature span.

Is the SK15B M4G compatible with lead-free reflow soldering processes?

Yes, the SK15B M4G features matte tin-plated leads qualified per J-STD-002 for solderability and is rated for moisture sensitivity level 1 (MSL-1), meaning it can be subjected to standard lead-free reflow profiles (e.g., JEDEC J-STD-020) without baking. The SK15B M4G's SMB package and termination system are fully compatible with automated SMT lines using Pb-free solder paste.

What does the "M4G" suffix indicate in SK15B M4G?

The "M4G" suffix in SK15B M4G denotes Taiwan Semiconductor's internal manufacturing code: "M" indicates the revision/version (M2212), "4" specifies the date code week/year format, and "G" identifies green (halogen-free) compound material. This marking aligns with TSC's standardized ordering nomenclature and confirms full RoHS and halogen-free compliance for the SK15B M4G.

SK15B 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):: 1A

Voltage - Forward (Vf) (Max) @ If:: 750 mV @ 1 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

SK15B M4G FAQ

1.How can I place an order for SK15B M4G through Aetrix?

Please submit a Request for Quotation (RFQ) for SK15B 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 SK15B M4G reliable?

The price and inventory of SK15B M4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK15B M4G is usually 5 days.

3.What payment methods are accepted for SK15B M4G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK15B M4G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SK15B M4G?

SK15B M4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SK15B 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 SK15B M4G?

For technical support, including SK15B M4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK15B M4G requirements.

6.How does Aetrix verify that SK15B M4G is sourced from the original manufacturer or authorized distributors?

All SK15B 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 SK15B M4G meets industry standards.

7.What is the process for return or replacement of SK15B M4G?

All SK15B M4G units undergo pre-shipment inspection (PSI). If there is an issue with SK15B 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 SK15B M4G part is unused and in its original packaging.

Return procedure for SK15B M4G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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