CS3M-E3/H Equivalent & Substitute Parts

Part Overview

The CS3M-E3/H is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 1000 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The diode operates across a junction temperature range of -55°C to 150°C and exhibits standard recovery characteristics with a reverse recovery time of 2.8 µs.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	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 @ 1000 V
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the CS3M-E3/H is determined by strict equivalence across the following critical parameters:

Voltage Rating: All substitute parts must maintain 1000 V DC reverse voltage (Vr) maximum
Current Rating: All substitute parts must support 3 A average rectified current (Io)
Package: All substitute parts must use DO-214AB (SMC) surface mount package for mechanical and thermal compatibility
Mounting Type: Surface mount configuration required for PCB assembly compatibility
Operating Temperature Range: Minimum -55°C to 150°C junction temperature range required

Secondary parameters including forward voltage (Vf), reverse recovery time (trr), reverse leakage current, and capacitance are provided for performance comparison but do not disqualify substitution when primary parameters align. All identified substitute parts meet the mandatory primary parameter requirements.

Parameter Comparison

Parameter	CS3M-E3/H (Vishay)	S3M-E3/57T (Vishay)	S3M (Diotec)	S3M-TP (MCC)	S3M_R1_00001 (Panjit)
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V	1000 V	1000 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 @ 1000 V	10 µA @ 1000 V	5 µA @ 1000 V	10 µA @ 1000 V	1 µA @ 1000 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
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Recommendation: S3M-E3/57T (Vishay General Semiconductor - Diodes Division)

The S3M-E3/57T is the direct manufacturer equivalent from Vishay, the original manufacturer of the CS3M-E3/H. This part maintains identical voltage and current ratings, operates across the same temperature range, and is classified as active product status. The S3M-E3/57T is RoHS3 compliant and REACH unaffected, providing regulatory continuity. Packaging is available in Cut Tape (CT) format with 34,200 units in stock, ensuring procurement availability.

Secondary Recommendation: S3M-TP (Micro Commercial Co)

The S3M-TP provides parametric equivalence with identical voltage, current, and temperature specifications. This part is RoHS3 compliant and REACH unaffected. Packaging is available in Tape & Reel (TR) format with 321,300 units in stock, offering the highest inventory availability. Forward voltage and reverse leakage characteristics match the original CS3M-E3/H specification.

Tertiary Recommendation: S3M_R1_00001 (Panjit International Inc.)

The S3M_R1_00001 meets all primary electrical and mechanical requirements with identical voltage, current, and temperature ratings. This part is RoHS3 compliant and REACH unaffected. Reverse leakage current is superior at 1 µA compared to the original 10 µA specification. Packaging is available in Tape & Reel (TR) format with 1,945 units in stock.

Alternative Consideration: S3M (Diotec Semiconductor)

The S3M from Diotec meets voltage and current requirements with improved reverse recovery time (1.5 µs versus 2.8 µs) and lower reverse leakage current (5 µA). Operating temperature range is -50°C to 150°C, which covers the original -55°C lower limit with a 5°C reduction. RoHS status is not applicable. Packaging is available in Cut Tape (CT) and Digi-Reel® formats with 9,293 units in stock.

Frequently Asked Questions (FAQ)

Q: Can the S3M-E3/57T directly replace the CS3M-E3/H without circuit modification?

A: Yes. The S3M-E3/57T maintains identical voltage rating (1000 V), current rating (3 A), forward voltage characteristics (1.15 V @ 2.5 A versus 1.2 V @ 3 A), and operating temperature range (-55°C to 150°C). Both parts use the DO-214AB (SMC) package. No circuit modification is required.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape (CT) packaging provides individual component strips suitable for manual assembly or small-volume production. Tape & Reel (TR) packaging provides continuous reels suitable for automated pick-and-place assembly equipment. Both formats contain the same diode in the DO-214AB (SMC) package. Selection depends on assembly process requirements.

Q: Why does the S3M from Diotec have a lower operating temperature minimum (-50°C versus -55°C)?

A: The Diotec S3M is specified with a -50°C to 150°C junction temperature range, which is 5°C higher at the lower limit compared to the original CS3M-E3/H (-55°C to 150°C). Applications requiring operation below -50°C must use alternative parts that maintain the -55°C minimum specification.

Q: Is the S3M-TP suitable for high-volume automated assembly?

A: Yes. The S3M-TP is available in Tape & Reel (TR) packaging with 321,300 units in stock, making it suitable for automated pick-and-place assembly. The DO-214AB (SMC) package is standard for surface mount equipment.

Q: What is the significance of RoHS3 compliance for these substitute parts?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. The S3M-E3/57T, S3M-TP, and S3M_R1_00001 are all RoHS3 compliant, ensuring regulatory alignment with modern manufacturing standards.

Q: Can the S3M_R1_00001 be used in applications requiring minimal reverse leakage current?

A: Yes. The S3M_R1_00001 exhibits 1 µA reverse leakage current at 1000 V, which is superior to the original CS3M-E3/H specification of 10 µA. This characteristic makes it suitable for applications sensitive to leakage current performance.

Q: Are all substitute parts REACH compliant?

A: The S3M-E3/57T, S3M-TP, and S3M_R1_00001 are all REACH unaffected. The Diotec S3M lists REACH status as vendor undefined. Applications requiring confirmed REACH compliance should prioritize the Vishay, Micro Commercial Co, or Panjit alternatives.

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