CS2K-E3/I Equivalent & Substitute Parts

Part Overview

The CS2K-E3/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 800 V DC reverse voltage and 1.6 A average rectified current in a surface mount DO-214AA (SMB) package. This part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. The substitute part S2K-E3/5BT provides functional equivalence with improved electrical characteristics and active product status.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	1.6	A
Voltage - Forward (Vf) (Max) @ If	1.15 @ 2 A	V
Reverse Recovery Time (trr)	2.1	µs
Current - Reverse Leakage @ Vr	5	µA @ 800 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the CS2K-E3/I is determined by equivalence in the following critical parameters:

Voltage Rating: Reverse voltage must equal or exceed 800 V DC
Current Rating: Average rectified current must support minimum 1.6 A operation
Package Type: Surface mount DO-214AA (SMB) package required for mechanical and thermal compatibility
Mounting Technology: Surface mount configuration for PCB assembly compatibility
Temperature Range: Operating junction temperature range of -55°C to 150°C
Regulatory Compliance: RoHS3 compliance and REACH unaffected status

The S2K-E3/5BT meets all substitution criteria with identical voltage and package specifications, while maintaining compatible forward voltage and recovery characteristics within the same product family.

Parameter Comparison

Parameter	CS2K-E3/I (Main Part)	S2K-E3/5BT (Substitute)	Compatibility
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	Equivalent
Current - Average Rectified (Io)	1.6 A	1.5 A	Substitute rated lower; suitable for applications ≤1.5 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 2 A	1.15 V @ 1.5 A	Equivalent at rated current
Reverse Recovery Time (trr)	2.1 µs	2 µs	Equivalent; substitute slightly faster
Current - Reverse Leakage @ Vr	5 µA @ 800 V	1 µA @ 800 V	Substitute superior; lower leakage
Package / Case	DO-214AA, SMB	DO-214AA, SMB	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Product Status	Obsolete	Active	Substitute actively manufactured

Engineering Selection Recommendations

The S2K-E3/5BT is the direct substitute for the obsolete CS2K-E3/I based on electrical and mechanical parameter equivalence. Selection of this substitute is supported by the following factors:

Identical Voltage Rating: Both parts rated for 800 V DC reverse voltage, ensuring equivalent circuit protection and voltage margin
Compatible Package: DO-214AA (SMB) surface mount package provides identical PCB footprint and thermal characteristics
Active Product Status: S2K-E3/5BT is actively manufactured, ensuring long-term availability and supply chain continuity
Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements
Current Rating Consideration: The substitute is rated for 1.5 A average rectified current, which is 0.1 A lower than the main part. Applications requiring the full 1.6 A rating must evaluate whether the 1.5 A rating is acceptable for the specific circuit design

The substitute part exhibits improved reverse leakage characteristics (1 µA versus 5 µA) and marginally faster recovery time (2 µs versus 2.1 µs), both favorable for circuit performance.

Frequently Asked Questions (FAQ)

Q: Can the S2K-E3/5BT directly replace the CS2K-E3/I in all applications?

A: The S2K-E3/5BT is mechanically and electrically compatible for applications requiring up to 1.5 A average rectified current. Applications specifically designed for the full 1.6 A rating of the CS2K-E3/I must confirm that the 1.5 A rating of the substitute is acceptable for the circuit design.

Q: Are the package dimensions identical between these parts?

A: Both parts use the DO-214AA (SMB) surface mount package. Mechanical compatibility is confirmed for PCB assembly and thermal management.

Q: What is the significance of the lower reverse leakage current in the substitute?

A: The S2K-E3/5BT exhibits 1 µA reverse leakage at 800 V compared to 5 µA for the CS2K-E3/I. Lower reverse leakage reduces standby power dissipation and improves circuit efficiency, particularly in high-impedance applications.

Q: Does the substitute meet the same regulatory requirements?

A: Both parts are ROHS3 compliant and REACH unaffected. Regulatory compliance is equivalent.

Q: Why is the main part classified as obsolete?

A: The CS2K-E3/I is obsolete due to product lifecycle management by the manufacturer. The S2K-E3/5BT represents the active equivalent within the Vishay General Semiconductor product family.

Q: What is the difference in recovery time between these parts?

A: The S2K-E3/5BT has a reverse recovery time of 2 µs compared to 2.1 µs for the CS2K-E3/I. This 0.1 µs difference is negligible for most standard recovery applications and represents a marginal improvement in the substitute.

Q: Are there packaging format differences between these parts?

A: The main part is supplied in Cut Tape (CT) and Digi-Reel® format. The substitute is supplied in Tape & Reel (TR) format. Both formats are standard surface mount packaging suitable for automated assembly.

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