CS3G-E3/I Equivalent & Substitute Parts

Part Overview

The CS3G-E3/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 400 V DC reverse voltage and 2 A average rectified current in a surface mount DO-214AB (SMC) package. This component is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. The part operates across a junction temperature range of -55°C to 150°C and complies with ROHS3 and REACH standards.

Substiute Parts

CS3G-E3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1185CS3G-E3/I Datasheet

Current PartRFQ

S3G-E3/9AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 12329S3G-E3/9AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS3G-E3/I is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must maintain a DC reverse voltage rating of 400 V or higher to ensure equivalent or superior reverse bias protection.

Current Rating: The substitute part must support an average rectified current of 2 A or greater. Higher current ratings provide design margin and extended operational capability.

Package Compatibility: The substitute part must use the DO-214AB (SMC) surface mount package to ensure mechanical and thermal compatibility with existing PCB layouts and assembly processes.

Forward Voltage Characteristics: Forward voltage drop at specified current levels must be comparable to ensure circuit performance consistency.

Reverse Recovery Time: Recovery time characteristics must be within acceptable ranges for the application's switching frequency and circuit topology.

Compliance Standards: The substitute part must maintain ROHS3 compliance and REACH unaffected status to satisfy regulatory and supply chain requirements.

The identified substitute part S3G-E3/9AT meets all these criteria while offering enhanced current capacity and improved reverse recovery characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: S3G-E3/9AT is the direct substitute for CS3G-E3/I. Both components share identical voltage ratings, package geometry, and thermal operating range. The substitute part is manufactured by the same supplier (Vishay General Semiconductor - Diodes Division) and maintains equivalent forward voltage characteristics.

Product Status Advantage: The S3G-E3/9AT holds active product status, ensuring continued availability and supply chain stability compared to the obsolete CS3G-E3/I. This substitution addresses the primary concern of component obsolescence.

Current Capacity: The S3G-E3/9AT is rated for 3 A average rectified current, exceeding the 2 A requirement of the original part. This provides operational margin and allows for potential future design enhancements without package or thermal changes.

Reverse Recovery Performance: The S3G-E3/9AT exhibits improved reverse recovery time (2.5 µs versus 2.8 µs), resulting in reduced switching losses and improved efficiency in rectification circuits.

Compliance Continuity: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment and supply chain compatibility.

Packaging Consideration: The substitute part is supplied in Tape & Reel (TR) format, compared to the original Cut Tape (CT) & Digi-Reel® packaging. This difference affects procurement and handling but does not impact electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can S3G-E3/9AT be used as a direct replacement for CS3G-E3/I in existing designs?

A: Yes. Both parts share identical voltage ratings (400 V), package geometry (DO-214AB, SMC), mounting type (surface mount), and operating temperature range (-55°C to 150°C). The substitute part meets or exceeds all electrical specifications of the original component.

Q: What is the significance of the higher current rating on the S3G-E3/9AT?

A: The S3G-E3/9AT is rated for 3 A average rectified current compared to 2 A for the CS3G-E3/I. This higher rating provides design margin and allows the component to operate with reduced thermal stress in applications requiring the original 2 A specification.

Q: How does the reverse recovery time difference affect circuit performance?

A: The S3G-E3/9AT exhibits a reverse recovery time of 2.5 µs compared to 2.8 µs for the CS3G-E3/I. This 0.3 µs improvement reduces switching losses and improves efficiency, particularly in high-frequency rectification applications. The difference is not significant for standard-speed recovery applications.

Q: Are there compliance or regulatory differences between the two parts?

A: No. Both CS3G-E3/I and S3G-E3/9AT maintain ROHS3 compliance and REACH unaffected status. Regulatory and environmental requirements are equivalent.

Q: What is the impact of the packaging format change from Cut Tape to Tape & Reel?

A: Packaging format affects procurement, storage, and assembly handling but does not impact electrical performance or PCB compatibility. Tape & Reel format is standard for high-volume production and offers improved handling efficiency.

Q: Why is the reverse leakage current higher on the S3G-E3/9AT?

A: The S3G-E3/9AT exhibits 10 µA reverse leakage at 400 V compared to 5 µA for the CS3G-E3/I. This difference is within acceptable ranges for general-purpose rectifier applications and does not compromise circuit performance in standard designs.

Q: Is the CS3G-E3/I still available for purchase?

A: The CS3G-E3/I is classified as obsolete. The S3G-E3/9AT is the active equivalent and is the recommended selection for new designs and ongoing production requirements.