CS3G-E3/H Equivalent & Substitute Parts

Part Overview

The CS3G-E3/H is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 400 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing production support, design updates, and inventory management. Equivalent parts maintain the same electrical and mechanical specifications, while substitute parts provide functional alternatives within the allowed parameter ranges for this diode category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 3 A	V
Reverse Recovery Time (trr)	2.8	µs
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the CS3G-E3/H is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a maximum DC reverse voltage (Vr) of 400 V or greater
Current Rating: All substitute parts must support an average rectified current (Io) of 3 A or greater
Package Type: All substitute parts must use the DO-214AB (SMC) surface mount package
Mounting Technology: All substitute parts must be surface mount compatible
Operating Temperature Range: All substitute parts must support the junction temperature range of -55°C to 150°C or a subset thereof
Forward Voltage: Forward voltage drop (Vf) variations within standard rectifier diode tolerances are acceptable
Reverse Recovery Time: Variations in reverse recovery time (trr) are acceptable provided the part operates within standard recovery specifications (>500 ns, >200 mA)
Reverse Leakage Current: Variations in reverse leakage current are acceptable within standard diode specifications

The substitute parts listed below meet all mandatory substitution criteria and are available from active or alternative sources.

Parameter Comparison

Parameter	CS3G-E3/H (Vishay)	S3G-E3/57T (Vishay)	S3G (Diotec)	S3G-TP (MCC)	S3G_R1_00001 (Panjit)
Manufacturer	Vishay	Vishay	Diotec	Micro Commercial Co	Panjit International
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 3 A	1.15 V @ 2.5 A	1.15 V @ 3 A	1.2 V @ 3 A	1.2 V @ 3 A
Reverse Recovery Time (trr)	2.8 µs	2.5 µs	1.5 µs	Not specified	Not specified
Current - Reverse Leakage @ Vr	10 µA @ 400 V	10 µA @ 400 V	5 µA @ 1700 V	10 µA @ 400 V	1 µA @ 400 V
Package / Case	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-50 to 150°C	-55 to 150°C	-55 to 150°C
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tape & Reel (TR)
Product Status	Obsolete	Active	Active	Not For New Designs	Active
RoHS Status	REACH Unaffected	ROHS3 Compliant	Not applicable	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: S3G-E3/57T (Vishay)

The S3G-E3/57T is the direct manufacturer equivalent from Vishay General Semiconductor - Diodes Division. This part maintains identical electrical specifications (400 V, 3 A) and package format (DO-214AB, SMC) as the CS3G-E3/H. The S3G-E3/57T carries Active product status and ROHS3 compliance, making it suitable for new designs and ongoing production. The primary difference is packaging format (Cut Tape versus Tape & Reel), which does not affect electrical performance. Inventory availability is significantly higher (30,400 units) compared to the original part.

Secondary Recommendation: S3G_R1_00001 (Panjit International)

The S3G_R1_00001 is an active, ROHS3-compliant substitute from Panjit International Inc. This part meets all mandatory electrical and mechanical parameters with identical voltage and current ratings. The reverse leakage current specification (1 µA @ 400 V) is superior to the original part. Operating temperature range matches the original specification (-55 to 150°C). This part is suitable for applications where Vishay sourcing is constrained.

Tertiary Recommendation: S3G (Diotec Semiconductor)

The S3G from Diotec Semiconductor is an active substitute meeting all critical electrical parameters. This part features improved reverse recovery time (1.5 µs versus 2.8 µs) and lower reverse leakage current (5 µA @ 1700 V). The operating temperature range is -50 to 150°C, which covers the original specification range. This part is suitable for applications where faster switching characteristics are beneficial.

Not Recommended for New Designs: S3G-TP (Micro Commercial Co)

The S3G-TP carries a "Not For New Designs" product status classification. While this part meets all electrical and mechanical substitution criteria, its obsolescence trajectory makes it unsuitable for new product development. This part may be used for legacy system support or repair applications only.

Frequently Asked Questions (FAQ)

Q: Can the S3G-E3/57T be used as a direct replacement for the CS3G-E3/H?

A: Yes. The S3G-E3/57T is electrically and mechanically equivalent to the CS3G-E3/H. Both parts are rated for 400 V, 3 A, and use the DO-214AB (SMC) surface mount package. The only difference is the packaging format (Cut Tape versus Tape & Reel), which does not affect circuit performance. The S3G-E3/57T is the recommended substitute due to its Active product status and higher inventory availability.

Q: What is the difference between the packaging formats (Tape & Reel versus Cut Tape)?

A: Tape & Reel (TR) and Cut Tape (CT) are different supply formats for surface mount components. Tape & Reel packaging is continuous and suitable for high-volume automated assembly. Cut Tape is pre-cut into smaller quantities and is suitable for lower-volume or manual assembly operations. Both formats contain identical components; the difference is in handling and dispensing method only.

Q: Are all substitute parts RoHS compliant?

A: The S3G-E3/57T, S3G-TP, and S3G_R1_00001 are ROHS3 compliant. The S3G from Diotec Semiconductor lists RoHS status as "Not applicable." For applications requiring RoHS compliance certification, use S3G-E3/57T, S3G-TP, or S3G_R1_00001.

Q: What is the significance of the reverse recovery time (trr) differences?

A: Reverse recovery time is the interval required for a diode to stop conducting in the reverse direction after the forward current is removed. The S3G from Diotec (1.5 µs) has faster recovery than the original CS3G-E3/H (2.8 µs). Faster recovery reduces switching losses and electromagnetic interference in high-frequency applications. For standard rectification applications, this difference is not critical.

Q: Can I use the S3G (Diotec) in place of the CS3G-E3/H?

A: Yes. The S3G meets all mandatory electrical parameters (400 V, 3 A, DO-214AB package) and operating temperature range (-50 to 150°C covers the original -55 to 150°C specification). The S3G is an active product from an alternative manufacturer and is suitable for substitution. Note that the operating temperature minimum is -50°C rather than -55°C; verify this meets your application requirements.

Q: Why is the S3G-TP marked "Not For New Designs"?

A: The "Not For New Designs" classification indicates that the manufacturer (Micro Commercial Co) has discontinued active development and support for this part. While the part remains available and functional, it is intended for legacy system support and repair only. For new product development, use S3G-E3/57T, S3G_R1_00001, or S3G instead.

Q: What is the difference in reverse leakage current specifications?

A: Reverse leakage current is the small current that flows through a diode when reverse biased. The original CS3G-E3/H specifies 10 µA @ 400 V. The S3G_R1_00001 specifies 1 µA @ 400 V (lower leakage), while the S3G from Diotec specifies 5 µA @ 1700 V (tested at higher voltage). Lower reverse leakage is generally beneficial for high-impedance circuits and reduces power dissipation. All values are within acceptable ranges for standard rectifier diodes.

Q: Are there any moisture sensitivity considerations for these parts?

A: The S3G-E3/57T, S3G-TP, and S3G_R1_00001 specify Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions. The S3G from Diotec lists MSL as "Not Applicable." All parts are suitable for standard PCB assembly and storage conditions without special moisture control requirements.

Q: What inventory levels are available for each substitute?

A: Current inventory levels are: S3G-E3/57T (30,400 units), S3G from Diotec (14,614 units), S3G-TP (6,327 units), and S3G_R1_00001 (4,230 units). Inventory levels are subject to change. Contact your supplier for current availability and lead time information.

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