S2K Diode Equivalent & Substitute Parts

Part Overview

The S2K is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 800V DC reverse voltage and 2A average rectified current in a surface mount DO-214AA (SMB) package. The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. This reference provides parametric equivalents and similar alternatives from active manufacturers that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.15	V @ 2 A
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	2	µs
Current - Reverse Leakage @ Vr	10	µA @ 800 V
Operating Temperature - Junction	-55 to 150	°C
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the S2K diode is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 800 V
Current - Average Rectified (Io): 2 A
Voltage - Forward (Vf) (Max) @ If: 1.15 V @ 2 A
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C minimum

Secondary Compatibility Parameters:

Speed: Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr): ≤ 2 µs
Current - Reverse Leakage @ Vr: ≤ 10 µA @ 800 V

Substitute parts are grouped into two categories:

Parametric Equivalents: Parts that match all primary equivalence criteria and maintain identical electrical performance specifications. These include S2K-LTP (Micro Commercial Co), S2KH (Taiwan Semiconductor Corporation), SB2K-M3/52T (Vishay), and SB2K-M3/5BT (Vishay).

Similar Alternatives: Parts that satisfy primary equivalence criteria with minor deviations in secondary parameters. The S2K from Diotec Semiconductor matches all primary criteria with improved reverse recovery time (1.5 µs). The S2K-13-F from Diodes Incorporated maintains voltage and package specifications but operates at 1.5A average rectified current, suitable for applications with lower current requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [µs]	Ir @ Vr [µA]	Tj (Min-Max) [°C]	Package	Product Status	RoHS Status
S2K	Micro Commercial Co	800	2	1.15 @ 2 A	2	10 @ 800 V	-55 to 150	DO-214AA (SMB)	Obsolete	RoHS non-compliant
S2K-LTP	Micro Commercial Co	800	2	1.15 @ 2 A	—	5 @ 800 V	-55 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
S2K	Diotec Semiconductor	800	2	1.15 @ 2 A	1.5	5 @ 800 V	-50 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
S2K-13-F	Diodes Incorporated	800	1.5	1.15 @ 1.5 A	—	5 @ 800 V	-65 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
S2KH	Taiwan Semiconductor Corporation	800	2	1.15 @ 2 A	1.5	1 @ 800 V	-55 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
SB2K-M3/52T	Vishay General Semiconductor - Diodes Division	800	2	1.15 @ 2 A	2	1 @ 800 V	-55 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant
SB2K-M3/5BT	Vishay General Semiconductor - Diodes Division	800	2	1.15 @ 2 A	2	1 @ 800 V	-55 to 150	DO-214AA (SMB)	Active	ROHS3 Compliant

Engineering Selection Recommendations

For RoHS3 Compliant Applications:

The S2K-LTP from Micro Commercial Co provides direct parametric equivalence to the original S2K while achieving ROHS3 compliance. This part maintains identical voltage, current, and temperature specifications and is recommended as the primary replacement for new designs and production continuity where RoHS compliance is required.

The S2KH from Taiwan Semiconductor Corporation offers parametric equivalence with AEC-Q101 automotive qualification and improved reverse leakage characteristics (1 µA vs. 10 µA). This part is suitable for automotive and high-reliability applications requiring enhanced quality assurance.

For Active Production with Enhanced Performance:

The S2K from Diotec Semiconductor provides full parametric equivalence with improved reverse recovery time (1.5 µs vs. 2 µs), resulting in faster switching characteristics. This part is actively produced and ROHS3 compliant.

The SB2K-M3/52T and SB2K-M3/5BT from Vishay maintain identical electrical specifications to the original S2K with improved reverse leakage (1 µA vs. 10 µA) and are actively produced with ROHS3 compliance.

For Current-Reduced Applications:

The S2K-13-F from Diodes Incorporated operates at 1.5A average rectified current with identical voltage ratings and forward voltage characteristics. This part is suitable for applications where the full 2A rating is not required, offering extended operating temperature range (-65°C to 150°C).

Compliance Considerations:

All recommended substitute parts are ROHS3 compliant, addressing the non-compliance status of the original S2K. All parts maintain DO-214AA (SMB) surface mount packaging, ensuring mechanical and thermal compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the S2K-13-F substitute for the S2K in all applications?

A: The S2K-13-F is electrically compatible for applications requiring 1.5A or less average rectified current. The 800V reverse voltage rating and forward voltage characteristics are identical. Applications requiring the full 2A rating must use parts rated for 2A, such as S2K-LTP, S2KH, SB2K-M3/52T, or SB2K-M3/5BT.

Q: What is the difference between S2KH and SB2K-M3/52T?

A: Both parts meet the primary equivalence criteria of 800V, 2A, and DO-214AA packaging. The S2KH includes AEC-Q101 automotive qualification and features lower reverse leakage (1 µA vs. 1 µA). The SB2K-M3/52T is a Vishay product with identical reverse leakage. Selection depends on application requirements and supplier availability.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes, all substitute parts listed are available in Tape & Reel (TR) packaging, suitable for automated assembly processes.

Q: Does the improved reverse recovery time in the Diotec S2K affect circuit performance?

A: The Diotec S2K features 1.5 µs reverse recovery time compared to 2 µs in the original S2K. This improvement results in faster switching characteristics and reduced switching losses, which may enhance efficiency in high-frequency applications. The part is fully compatible with designs specified for the original S2K.

Q: What is the significance of AEC-Q101 qualification on the S2KH?

A: AEC-Q101 is an automotive industry qualification standard. The S2KH meets this qualification, making it suitable for automotive and high-reliability applications requiring enhanced quality assurance and traceability.

Q: Can I use the S2K-LTP as a direct replacement in existing designs?

A: Yes, the S2K-LTP is a parametric equivalent with identical voltage, current, and temperature specifications. It maintains the same DO-214AA (SMB) package and surface mount configuration. The primary advantage is ROHS3 compliance, addressing regulatory requirements for new production.

Q: What packaging options are available for substitute parts?

A: All substitute parts are available in Tape & Reel (TR) packaging for automated assembly. The DO-214AA (SMB) package format is consistent across all alternatives, ensuring mechanical compatibility with existing PCB designs.

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