FS2B-LTP Equivalent & Substitute Parts

Part Overview

The FS2B-LTP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 2 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design requirements and procurement needs. The FS2B-LTP operates across a junction temperature range of -50°C to 150°C and features fast recovery characteristics with a reverse recovery time of 150 ns.

Substiute Parts

FS2B-LTP

Micro Commercial CoIn Stock: 916FS2B-LTP Datasheet

Current PartRFQ

UH1BHE3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1111UH1BHE3_A/H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FS2B-LTP is determined by electrical and mechanical compatibility within the following parameters:

Voltage Rating: The substitute part must maintain a DC reverse voltage rating of 100 V or greater to ensure safe operation in the original circuit application.

Package and Mounting: The substitute must use the DO-214AC (SMA) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Speed Classification: The substitute must maintain fast recovery characteristics (≤ 500 ns for currents > 200 mA) to preserve circuit performance and switching behavior.

Current Rating: While the FS2B-LTP is rated for 2 A average rectified current, substitute parts with equal or greater current ratings are acceptable. Parts with lower current ratings do not qualify as direct substitutes.

Temperature Range: The substitute must support the operating junction temperature range or a range that encompasses the original specification.

Compliance Standards: The substitute must maintain RoHS3 compliance and REACH unaffected status to satisfy regulatory and environmental requirements.

Parameter Comparison

Engineering Selection Recommendations

The UH1BHE3_A/H from Vishay General Semiconductor qualifies as a substitute for the obsolete FS2B-LTP based on the following engineering criteria:

Voltage and Package Compatibility: Both parts share identical 100 V DC reverse voltage ratings and DO-214AC (SMA) surface mount packages, ensuring direct mechanical and electrical compatibility at the board level.

Active Product Status: The UH1BHE3_A/H maintains active production status, providing supply chain continuity and long-term availability compared to the obsolete FS2B-LTP.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements without modification to design documentation.

Enhanced Performance Characteristics: The UH1BHE3_A/H demonstrates superior performance in reverse recovery time (25 ns versus 150 ns), lower reverse leakage current (1 µA versus 5 µA), and reduced junction capacitance (17 pF versus 50 pF). These characteristics provide improved switching performance and reduced parasitic effects.

Extended Temperature Range: The substitute operates across -55°C to 175°C, exceeding the original -50°C to 150°C range and providing additional thermal margin for demanding applications.

Current Rating Consideration: The UH1BHE3_A/H is rated for 1 A average rectified current, which is lower than the FS2B-LTP 2 A rating. Circuit designs operating at or near the 2 A maximum must be evaluated to confirm that the 1 A rating of the substitute is sufficient for the intended application.

Automotive Grade Qualification: The UH1BHE3_A/H carries automotive grade designation and AEC-Q101 qualification, indicating compliance with automotive reliability and quality standards. This qualification is not present in the FS2B-LTP specification.

Frequently Asked Questions (FAQ)

Q: Can the UH1BHE3_A/H directly replace the FS2B-LTP in all applications?

A: Direct replacement is possible from a package and voltage perspective. However, the current rating difference (1 A versus 2 A) requires circuit evaluation. Applications operating below 1 A average rectified current can use the substitute without modification. Applications requiring the full 2 A rating must be redesigned or alternative parts identified.

Q: What is the significance of the faster reverse recovery time in the UH1BHE3_A/H?

A: The UH1BHE3_A/H exhibits a reverse recovery time of 25 ns compared to 150 ns in the FS2B-LTP. Faster recovery reduces switching losses and improves efficiency in high-frequency switching applications. This characteristic is beneficial and does not create compatibility issues.

Q: Are there packaging differences between the FS2B-LTP and UH1BHE3_A/H?

A: Both parts use the DO-214AC (SMA) surface mount package. The FS2B-LTP is supplied in standard packaging, while the UH1BHE3_A/H is supplied in Tape & Reel (TR) format. This difference affects procurement and assembly processes but does not affect electrical or mechanical compatibility on the PCB.

Q: Does the automotive grade designation of the UH1BHE3_A/H affect its use in non-automotive applications?

A: No. Automotive grade components meet or exceed the reliability and quality standards of standard-grade components. The AEC-Q101 qualification of the UH1BHE3_A/H indicates enhanced reliability and is compatible with all application categories.

Q: What is the impact of the lower reverse leakage current in the UH1BHE3_A/H?

A: Lower reverse leakage current (1 µA versus 5 µA) reduces parasitic current paths and improves circuit efficiency. This characteristic is beneficial and does not create compatibility issues.

Q: How should the extended temperature range of the UH1BHE3_A/H be considered?

A: The UH1BHE3_A/H operates from -55°C to 175°C, compared to -50°C to 150°C for the FS2B-LTP. The extended range provides additional thermal margin and is compatible with applications designed for the original temperature specification.

Q: Is the reduced capacitance of the UH1BHE3_A/H significant for circuit design?

A: The UH1BHE3_A/H exhibits lower junction capacitance (17 pF versus 50 pF at 4 V, 1 MHz). In high-frequency applications, lower capacitance reduces parasitic effects and improves performance. In low-frequency applications, this difference is negligible.