SK515B Schottky Diode 150V 5A Equivalent & Substitute Parts

Part Overview

The SK515B is an active-status Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 150V DC reverse voltage and 5A average rectified current in a surface mount DO-214AA (SMB) package. This component is designed for fast recovery applications with switching speeds ≤500ns and operates across a junction temperature range of -55°C to 150°C. The SK515B is ROHS3 compliant and carries MSL 1 (unlimited moisture sensitivity level) classification, making it suitable for standard industrial and commercial applications requiring high-speed rectification at moderate voltage and current levels.

Equivalent and substitute parts are identified to address component availability, supply chain continuity, and design flexibility while maintaining electrical and mechanical compatibility within the specified parameter envelope.

Substiute Parts

SK515B

Taiwan Semiconductor CorporationIn Stock: 12292SK515B Datasheet

Current PartRFQ

SK515B

Taiwan Semiconductor CorporationIn Stock: 12292SK515B Datasheet

DirectRFQ

BR515L_R1_00001

Panjit International Inc.In Stock: 1748BR515L_R1_00001 Datasheet

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CDBB1150-HF

Comchip TechnologyIn Stock: 1064CDBB1150-HF Datasheet

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CDBB2150-HF

Comchip TechnologyIn Stock: 1028CDBB2150-HF Datasheet

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CDBB3150-HF

Comchip TechnologyIn Stock: 6375CDBB3150-HF Datasheet

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SBR3150SB-13

Diodes IncorporatedIn Stock: 9741SBR3150SB-13 Datasheet

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STPS3150U

STMicroelectronicsIn Stock: 18048STPS3150U Datasheet

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STPS3150UY

STMicroelectronicsIn Stock: 42824STPS3150UY Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the SK515B is based on strict electrical and mechanical parameter matching within the following criteria:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) Maximum: 150V (exact match required)
• Technology: Schottky (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Package / Case: DO-214AA or SMB (exact match required)
• Current - Average Rectified (Io): Equal to or greater than 5A
• Speed: Fast Recovery ≤500ns, >200mA (Io) (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)

Substitution Categories:

Direct Equivalent: Parts with identical electrical specifications (150V, 5A, 950mV forward voltage @ 5A).

Functional Equivalent - Higher Current Rating: Parts rated for 150V at 3A current capacity. These devices operate within the same voltage envelope and package but at reduced current ratings. Selection requires circuit analysis to confirm current demand does not exceed the substitute part's 3A maximum.

Functional Equivalent - Lower Current Rating: Parts rated for 150V at 1A or 2A current capacity. These devices are suitable only for applications where circuit current requirements are within the substitute part's rated capacity.

All substitute parts listed maintain DO-214AA (SMB) package compatibility, Schottky technology, fast recovery characteristics, and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Selection:

The BR515L_R1_00001 (Panjit International Inc.) is a direct electrical equivalent to the SK515B, matching the 150V, 5A specification with identical junction temperature maximum of 150°C. This part is ROHS3 compliant and maintains all required fast recovery characteristics. Selection of BR515L_R1_00001 is appropriate for direct substitution in applications where the SK515B is specified.

Functional Equivalent Selection - 3A Current Rating:

The CDBB3150-HF (Comchip Technology), SBR3150SB-13 (Diodes Incorporated), STPS3150U, and STPS3150UY (STMicroelectronics) are rated for 150V at 3A average rectified current. These parts are suitable for applications where circuit current demand does not exceed 3A. All maintain ROHS3 compliance and fast recovery specifications. The STPS3150UY variant includes automotive-grade qualification and extended junction temperature range (-40°C to 175°C).

Functional Equivalent Selection - 2A Current Rating:

The CDBB2150-HF (Comchip Technology) is rated for 150V at 2A average rectified current and is suitable for applications where circuit current demand does not exceed 2A. This part is ROHS3 compliant and maintains fast recovery characteristics.

Functional Equivalent Selection - 1A Current Rating:

The CDBB1150-HF (Comchip Technology) is rated for 150V at 1A average rectified current and is suitable for applications where circuit current demand does not exceed 1A. This part is ROHS3 compliant and maintains fast recovery characteristics.

All substitute parts listed carry ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the SK515B.

Frequently Asked Questions (FAQ)

Q: Can the BR515L_R1_00001 be used as a direct replacement for the SK515B?

A: Yes. The BR515L_R1_00001 is rated for 150V at 5A with identical junction temperature maximum (150°C) and maintains all required electrical characteristics including fast recovery speed and Schottky technology. Both parts are ROHS3 compliant and packaged in DO-214AA (SMB).

Q: What is the difference between the SK515B and the 3A-rated substitutes (CDBB3150-HF, SBR3150SB-13, STPS3150U, STPS3150UY)?

A: The primary difference is current rating. The SK515B is rated for 5A average rectified current, while these substitutes are rated for 3A. All maintain 150V reverse voltage rating, Schottky technology, fast recovery characteristics, and DO-214AA (SMB) packaging. Selection of a 3A-rated part requires verification that circuit current demand does not exceed 3A.

Q: Are the STPS3150U and STPS3150UY interchangeable?

A: Both parts are rated for 150V at 3A with identical electrical characteristics. The STPS3150UY includes automotive-grade qualification and extended junction temperature range (-40°C to 175°C) compared to the STPS3150U (maximum 175°C). Selection depends on application requirements and temperature operating envelope.

Q: Can lower-rated current parts (CDBB2150-HF, CDBB1150-HF) be used in place of the SK515B?

A: These parts can be used only in applications where circuit current demand is within their rated capacity (2A for CDBB2150-HF, 1A for CDBB1150-HF). Use of an undersized current-rated device in a circuit requiring 5A will result in component failure or thermal damage.

Q: Do all substitute parts maintain the same package footprint as the SK515B?

A: Yes. All listed substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and footprint compatibility with the SK515B.

Q: What is the significance of reverse leakage current differences among substitute parts?

A: Reverse leakage current (measured at rated reverse voltage) varies among manufacturers. The SK515B specifies 100µA @ 150V, while some substitutes specify lower values (STPS3150U and STPS3150UY at 2µA) or higher values (Comchip parts at 500µA). Lower reverse leakage reduces standby power dissipation; higher leakage increases standby current. Selection depends on circuit sensitivity to leakage current.

Q: Are all substitute parts suitable for high-temperature applications?

A: Most substitute parts support extended junction temperature ranges. The STPS3150U and STPS3150UY are rated to 175°C maximum junction temperature, compared to the SK515B at 150°C. The CDBB series (Comchip) also supports 175°C maximum. Selection for high-temperature applications should prioritize parts with higher temperature ratings.