CS3M-E3/I Equivalent & Substitute Parts

Part Overview

The CS3M-E3/I is a general-purpose rectifier diode rated for 1000 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 suitable substitute parts necessary for ongoing design support and procurement continuity. The part is manufactured by Vishay General Semiconductor - Diodes Division and complies with ROHS3 and REACH requirements.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max)	1.15 V @ 3 A
Reverse Recovery Time (trr)	2.8 µs
Current - Reverse Leakage @ Vr	5 µA @ 1000 V
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the CS3M-E3/I is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 1000 V
Package / Case: Must be DO-214AB, SMC (identical footprint and mounting)
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must encompass -55°C ~ 150°C

Current Rating Consideration: The substitute part S3M-E3/9AT carries a higher average rectified current rating of 3 A, compared to the original 2 A specification. This represents an uprated component that maintains all voltage and package requirements while providing increased current capacity. The higher current rating does not restrict its use in applications designed for the original 2 A part, as it remains backward compatible within the same voltage class and package footprint.

Compliance Requirements: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

Parameter Comparison

Parameter	CS3M-E3/I (Main Part)	S3M-E3/9AT (Substitute)
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Category	Diodes, Rectifiers	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V
Current - Average Rectified (Io)	2 A	3 A
Voltage - Forward (Vf) (Max)	1.15 V @ 3 A	1.15 V @ 2.5 A
Reverse Recovery Time (trr)	2.8 µs	2.5 µs
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	10 µA @ 1000 V
Package / Case	DO-214AB, SMC	DO-214AB, SMC
Mounting Type	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The S3M-E3/9AT is a direct substitute for the obsolete CS3M-E3/I based on the following criteria:

Voltage and Package Compatibility: Both parts share identical 1000 V reverse voltage ratings and DO-214AB surface mount packaging, ensuring electrical and mechanical interchangeability at the circuit board level.

Current Rating: The S3M-E3/9AT provides 3 A average rectified current capacity, exceeding the original 2 A specification. This uprated current capability maintains full backward compatibility with designs specified for the CS3M-E3/I, as the substitute operates within the same voltage class and thermal envelope.

Regulatory Compliance: The S3M-E3/9AT maintains ROHS3 compliance and REACH unaffected status, matching the environmental and regulatory requirements of the original part.

Product Status: The S3M-E3/9AT is classified as active, ensuring ongoing availability and supply chain continuity compared to the obsolete CS3M-E3/I.

Recovery Characteristics: The S3M-E3/9AT exhibits a slightly faster reverse recovery time (2.5 µs versus 2.8 µs), representing an incremental performance improvement within the standard recovery classification.

Frequently Asked Questions (FAQ)

Q: Can the S3M-E3/9AT be used as a direct replacement for the CS3M-E3/I in existing designs?

A: Yes. Both parts share identical voltage ratings (1000 V), package types (DO-214AB, SMC), and operating temperature ranges (-55°C ~ 150°C). The S3M-E3/9AT is rated for higher current (3 A versus 2 A), making it suitable for applications originally designed for the 2 A part.

Q: What is the significance of the higher current rating on the S3M-E3/9AT?

A: The 3 A rating on the S3M-E3/9AT provides additional current capacity beyond the original 2 A specification. This does not restrict its use in 2 A applications; rather, it offers design flexibility for circuits requiring higher current handling without changing the package footprint or voltage class.

Q: Are there any thermal or mounting differences between these parts?

A: No. Both parts use identical surface mount DO-214AB (SMC) packaging and operate across the same junction temperature range (-55°C ~ 150°C). PCB layout and thermal management considerations remain unchanged.

Q: How do the reverse leakage characteristics compare?

A: The S3M-E3/9AT exhibits 10 µA reverse leakage at 1000 V, compared to 5 µA for the CS3M-E3/I. This difference is within standard rectifier diode specifications and does not impact circuit performance in typical general-purpose rectification applications.

Q: What is the availability status of each part?

A: The CS3M-E3/I is classified as obsolete. The S3M-E3/9AT is active and maintains substantial inventory (24,300 pieces), ensuring reliable procurement for new designs and production continuity.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the CS3M-E3/I and S3M-E3/9AT are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

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