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

Taiwan Semiconductor Corporation SK115B

Name: SK115B
Brand: Taiwan Semiconductor Corporation
SKU: SK115B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SK115B

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: SK115B.pdf

Description:: DIODE SCHOTTKY 150V 1A DO214AA

Quantity:: RFQ Add To RFQ list

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Inventory:8,399

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Product details

Overview

SK115B from Taiwan Semiconductor is a 1 A, 150 V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring 0.95 V forward voltage at 1 A and 100 µA reverse leakage at 25°C, designed for high-efficiency DC/DC conversion in compact power supplies.

For engineers reviewing the SK115B datasheet, SK115B pinout, SK115B application, or SK115B equivalent, key selection criteria include peak reverse voltage rating, thermal resistance (25°C/W), surge current capability (30 A), junction temperature range (–55°C to +150°C), and RoHS/halogen-free compliance for industrial and lighting power designs.

Technical Context

The SK115B operates as a single-die Schottky rectifier with guard ring structure for overvoltage protection and JESD201 Class 2 whisker resistance. Its 150 V V_RRM and 10,000 V/µs dV/dt support fast-switching topologies in offline and isolated converters.

Thermal performance is defined by 25°C/W junction-to-lead resistance and a maximum junction temperature of +150°C, enabling sustained 1 A conduction under elevated ambient conditions when mounted on standard PCB copper areas.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	150 V - supports input rectification up to 100 V_RMS in universal AC-DC front-ends
I_F	1 A continuous - suitable for low-to-mid power SMPS output stages and auxiliary rails
V_F @ 1 A, 25°C	0.95 V - reduces conduction loss vs. silicon diodes, improving efficiency in 12–48 V systems
I_FSM	30 A (8.3 ms half-sine) - withstands startup surges and transient load spikes without failure
R_θJL	25°C/W - enables direct thermal path to PCB copper, simplifying heatsinking in space-constrained layouts
I_R @ V_R, 25°C	100 µA - low leakage preserves standby power budget in energy-sensitive adapters
T_J max	+150°C - extends operational margin in enclosed or thermally stressed environments

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode-indicated band; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to lower-potential node (e.g., transformer secondary center-tap or switch node)
Cathode	Current exit point during forward conduction; marked by band	Connected to output rail or filter capacitor positive terminal; polarity critical for correct rectification

Key Features

Feature	Design Value
Guard ring overvoltage protection	Enhances ruggedness against voltage transients without external snubbers in flyback or boost converters
Moisture sensitivity level 1	Eliminates bake requirements before reflow, reducing manufacturing cost and cycle time
RoHS and halogen-free compliance	Meets IEC 61249-2-21 and global environmental regulations for consumer and industrial end equipment
High surge current capability (30 A)	Supports repeated cold-start events in LED drivers and AC adapters without degradation

Applications

LED Lighting Driver	USB-C PD Adapter Output
Use Scenario: Secondary-side rectification in constant-current LED drivers operating from 36–72 V DC bus. IC Role / Device Role / Timing Role: Schottky rectifier replacing synchronous MOSFETs where simplicity and cost outweigh marginal efficiency gains. Use Value: 0.95 V V_F minimizes heat generation in sealed luminaires, while 150 V rating accommodates line transients up to ±50 V.	Use Scenario: Output rectification in 65 W USB-C PD adapters with dual-output (5 V/20 V) flyback topology. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectified secondary stage, handling 1 A average load at 20 V. Use Value: 100 µA reverse leakage at 25°C ensures <1 mW standby loss; DO-214AA footprint fits tight layout constraints near transformer.
Industrial DC/DC Converter	Smart Home Power Module
Use Scenario: Input rectification for 24 V input, 5 V/3.3 V isolated DC/DC modules used in PLC I/O cards. IC Role / Device Role / Timing Role: Bridge rectifier leg in full-wave configuration feeding bulk capacitor for downstream buck regulators. Use Value: 30 A I_FSM tolerates 120 Hz ripple surges from unregulated 24 VAC sources; +150°C T_J rating ensures reliability in cabinet-mounted enclosures.	Use Scenario: Auxiliary supply rectification in battery-backed smart thermostats and Zigbee gateways. IC Role / Device Role / Timing Role: Low-leakage rectifier for charging supercapacitor backup circuits from 5 V USB input. Use Value: 2 mA I_R at 125°C prevents excessive self-discharge during high-temperature storage; halogen-free compound meets UL 94V-0 flammability.

LED Lighting Driver

USB-C PD Adapter Output

Use Scenario: Secondary-side rectification in constant-current LED drivers operating from 36–72 V DC bus.

IC Role / Device Role / Timing Role: Schottky rectifier replacing synchronous MOSFETs where simplicity and cost outweigh marginal efficiency gains.

Use Value: 0.95 V V_F minimizes heat generation in sealed luminaires, while 150 V rating accommodates line transients up to ±50 V.

Use Scenario: Output rectification in 65 W USB-C PD adapters with dual-output (5 V/20 V) flyback topology.

IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectified secondary stage, handling 1 A average load at 20 V.

Use Value: 100 µA reverse leakage at 25°C ensures <1 mW standby loss; DO-214AA footprint fits tight layout constraints near transformer.

Industrial DC/DC Converter

Smart Home Power Module

Use Scenario: Input rectification for 24 V input, 5 V/3.3 V isolated DC/DC modules used in PLC I/O cards.

IC Role / Device Role / Timing Role: Bridge rectifier leg in full-wave configuration feeding bulk capacitor for downstream buck regulators.

Use Value: 30 A I_FSM tolerates 120 Hz ripple surges from unregulated 24 VAC sources; +150°C T_J rating ensures reliability in cabinet-mounted enclosures.

Use Scenario: Auxiliary supply rectification in battery-backed smart thermostats and Zigbee gateways.

IC Role / Device Role / Timing Role: Low-leakage rectifier for charging supercapacitor backup circuits from 5 V USB input.

Use Value: 2 mA I_R at 125°C prevents excessive self-discharge during high-temperature storage; halogen-free compound meets UL 94V-0 flammability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS115H (ON Semiconductor)	Same 150 V V_RRM, 1 A I_F, but VF = 0.87 V @ 1 A; DO-214AA package; no guard ring	Slightly lower conduction loss, but reduced transient robustness in noisy industrial environments	Prefer SS115H where efficiency dominates and EMI filtering is already present
SB1150 (Vishay)	150 V V_RRM, 1 A I_F, VF = 0.92 V @ 1 A; DO-214AA; TJ max = +125°C	Limited thermal margin in high-ambient applications; higher IR (200 µA @ 25°C)	Select SB1150 only for cost-sensitive, low-power consumer designs with adequate derating

Compared with SS115H and SB1150, the SK115B offers superior thermal endurance (+150°C), lower leakage (100 µA), and integrated guard ring protection-making it optimal for industrial and lighting applications demanding long-term reliability under thermal and electrical stress.

Availability

SK115B is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and USB-C PD adapters requiring stable component supply and consistent parametric performance across production lots.

Supply support for SK115B 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 SK115B belongs to TSC's SKx series of Schottky rectifiers, engineered specifically for high-reliability, surface-mount power conversion in cost-sensitive yet thermally demanding applications such as lighting, adapters, and industrial DC/DC modules.

FAQ

What is the maximum junction temperature rating for the SK115B?

The SK115B has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet (Version M2212). This allows operation in high-ambient environments like enclosed LED drivers or industrial control cabinets. The SK115B must be derated above +125°C ambient per its forward current derating curve, and thermal design should account for its 25°C/W junction-to-lead resistance to maintain safe T_J.

Does the SK115B have a guard ring structure, and what benefit does it provide?

Yes, the SK115B incorporates a guard ring for overvoltage protection, explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. This structure improves edge termination robustness, raising the device's critical rate of rise of off-state voltage (dV/dt) to 10,000 V/µs. In practice, this enhances immunity to voltage spikes in flyback and boost converters, reducing risk of premature breakdown without requiring external snubber networks.

What is the forward voltage drop of the SK115B at rated current and temperature?

The SK115B exhibits a typical forward voltage (V_F) of 0.95 V at 1 A and 25°C, as confirmed in the ELECTRICAL SPECIFICATIONS table (page 2, Version M2212). At 100°C junction temperature, V_F decreases slightly due to Schottky physics, remaining below 0.85 V. This low V_F directly reduces conduction losses compared to standard PN diodes, supporting higher efficiency in 12–48 V output power stages.

Is the SK115B RoHS and halogen-free compliant?

Yes, the SK115B is RoHS compliant and halogen-free per IEC 61249-2-21, as documented in the FEATURES section of the Taiwan Semiconductor datasheet. Its molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated per J-STD-002. These attributes make the SK115B suitable for export to EU, China, and other regulated markets requiring strict environmental compliance.

What is the reverse leakage current of the SK115B at 150 V and 125°C?

At rated reverse voltage (150 V) and junction temperature of 125°C, the SK115B specifies a maximum reverse current (I_R) of 2 mA, per the ELECTRICAL SPECIFICATIONS table (page 2, Version M2212). This value is measured using a 30 ms pulse test. Designers must account for this leakage in ultra-low-power standby circuits, though it remains significantly lower than equivalent silicon rectifiers at the same temperature.

SK115B Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 150 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 950 mV @ 3 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 100 µA @ 150 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMB)

Operating Temperature - Junction:: -55°C ~ 150°C

SK115B FAQ

1.How can I place an order for SK115B through Aetrix?

Please submit a Request for Quotation (RFQ) for SK115B 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 SK115B reliable?

The price and inventory of SK115B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK115B is usually 5 days.

3.What payment methods are accepted for SK115B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK115B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SK115B?

SK115B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SK115B 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 SK115B?

For technical support, including SK115B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK115B requirements.

6.How does Aetrix verify that SK115B is sourced from the original manufacturer or authorized distributors?

All SK115B 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 SK115B meets industry standards.

7.What is the process for return or replacement of SK115B?

All SK115B units undergo pre-shipment inspection (PSI). If there is an issue with SK115B, 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 SK115B part is unused and in its original packaging.

Return procedure for SK115B:

1.Submit a request within 90 days.

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

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