STPS340B-TR Equivalent & Substitute Parts

Part Overview

The STPS340B-TR is a Schottky rectifier diode manufactured by STMicroelectronics, rated for 40 V DC reverse voltage and 3 A average rectified current in a Surface Mount DPAK package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with modified performance parameters within acceptable application ranges.

Substiute Parts

STPS340B-TR

STMicroelectronicsIn Stock: 3333STPS340B-TR Datasheet

Current PartRFQ

STPS5H100B-TR

STMicroelectronicsIn Stock: 25291STPS5H100B-TR Datasheet

MFR RecommendedRFQ

CSHD3-40 TR13 PBFREE

Central Semiconductor CorpIn Stock: 6759CSHD3-40 TR13 PBFREE Datasheet

SimilarRFQ

RB075BM40STL

Rohm SemiconductorIn Stock: 2331RB075BM40STL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS340B-TR is determined by the following critical parameters: reverse voltage rating (Vr), average rectified current (Io), forward voltage drop (Vf), reverse leakage current, package type, and thermal characteristics. All substitute parts listed maintain the same Schottky technology classification and Surface Mount DPAK packaging, ensuring mechanical and thermal compatibility.

Substitutes are grouped into two categories:

Category 1: Electrical Equivalents (Identical Voltage and Current Ratings) Parts maintaining 40 V reverse voltage and 3 A current specifications provide direct functional replacement with minimal circuit redesign.

Category 2: Electrical Upgrades (Enhanced Voltage or Current Ratings) Parts with higher voltage or current ratings provide enhanced performance margins while maintaining backward compatibility in applications where the original specifications are not fully utilized.

Parameter Comparison

Engineering Selection Recommendations

CSHD3-40 TR13 PBFREE (Central Semiconductor Corp)

This part provides electrical equivalence to the STPS340B-TR with identical 40 V reverse voltage and 3 A current ratings. The component is active in production status, ensuring long-term availability. Forward voltage drop is 650 mV at 3 A, representing a 20 mV increase over the original specification. Reverse leakage current is specified at 100 µA at 40 V, which is elevated compared to the original 20 µA specification. This part is suitable for applications where the original STPS340B-TR specifications are required and minor increases in leakage current are acceptable. ROHS3 compliance and MSL 1 rating match the original component.

RB075BM40STL (Rohm Semiconductor)

This part maintains the 40 V reverse voltage rating while providing enhanced current capacity at 5 A, compared to the original 3 A specification. The component is active in production status. Forward voltage drop is 730 mV at 5 A. Reverse leakage current is 5 µA at 40 V, which is lower than the original specification. The enhanced current rating provides design margin for applications operating near the original 3 A limit. ROHS3 compliance and MSL 1 rating match the original component. Operating temperature maximum remains at 150°C.

STPS5H100B-TR (STMicroelectronics)

This part provides enhanced voltage and current ratings at 100 V reverse voltage and 5 A average rectified current. The component is active in production status and manufactured by the original equipment supplier. Forward voltage drop is 730 mV at 5 A. Reverse leakage current is 3.5 µA at 100 V, representing superior leakage performance. Operating temperature maximum is elevated to 175°C, providing enhanced thermal margin. This part is suitable for applications requiring higher voltage or current capacity than the original specification, or where enhanced thermal performance is beneficial. ROHS3 compliance and MSL 1 rating match the original component.

Frequently Asked Questions (FAQ)

Q: Can CSHD3-40 TR13 PBFREE be used as a direct replacement for STPS340B-TR?

A: Yes. Both parts share identical voltage (40 V) and current (3 A) ratings, identical package type (TO-252-3 DPAK), and identical mounting configuration. The forward voltage drop difference of 20 mV and elevated reverse leakage current of 100 µA are within acceptable tolerances for most applications. Both parts are ROHS3 compliant with MSL 1 rating.

Q: What is the advantage of using RB075BM40STL over STPS340B-TR?

A: RB075BM40STL provides the same 40 V reverse voltage rating while offering enhanced current capacity at 5 A versus the original 3 A. This provides design margin for applications operating near maximum current limits. Reverse leakage current is also lower at 5 µA compared to the original 20 µA. Package and mounting type are identical.

Q: When should STPS5H100B-TR be selected instead of direct equivalents?

A: STPS5H100B-TR should be selected when applications require voltage ratings exceeding 40 V or current capacity exceeding 5 A. The enhanced 100 V rating provides protection against voltage transients. The elevated operating temperature maximum of 175°C versus 150°C offers thermal design margin. This part is manufactured by STMicroelectronics, the original supplier.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts listed use the TO-252-3 DPAK package with 2 leads plus tab configuration (SC-63). This ensures mechanical compatibility with existing PCB layouts and assembly processes.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All substitute parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating. All parts share the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications as the original STPS340B-TR.

Q: What is the difference in reverse leakage current between the substitute parts?

A: STPS340B-TR specifies 20 µA at 40 V. CSHD3-40 TR13 PBFREE specifies 100 µA at 40 V. RB075BM40STL specifies 5 µA at 40 V. STPS5H100B-TR specifies 3.5 µA at 100 V. Lower leakage current reduces power dissipation in standby conditions and improves circuit efficiency.

Q: Can forward voltage drop differences affect circuit performance?

A: Forward voltage drop differences are minor across all substitute parts. STPS340B-TR specifies 630 mV at 3 A. Substitutes range from 650 mV to 750 mV at their respective current ratings. These differences typically result in less than 5% variation in power dissipation and are acceptable in most rectifier applications.