S3D Equivalent & Substitute Parts Reference

Part Overview

The S3D is a general-purpose rectifier diode rated for 200 V DC reverse voltage and 3 A average rectified current in a surface mount SMC (DO-214AB) package. This component is classified as obsolete and is no longer recommended for new designs. The product status necessitates identification of equivalent and substitute parts to support ongoing maintenance, repair, and legacy system requirements. Substitute parts are selected based on matching electrical performance parameters and mechanical compatibility within the DO-214AB and SMB package families.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 3 A	V
Current - Reverse Leakage @ Vr	10	µA @ 200 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Speed Classification	Standard Recovery >500ns	—

Substitute Part Grouping Explanation

Substitution of the S3D rectifier diode is determined by the following critical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): 200 V minimum
Current - Average Rectified (Io): 3 A minimum
Voltage - Forward (Vf) (Max): ≤ 1.3 V at rated current
Current - Reverse Leakage @ Vr: ≤ 10 µA @ 200 V
Operating Temperature Range: -55°C to 150°C minimum

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount
Package / Case: DO-214AB (SMC) or DO-214AA (SMB)
Moisture Sensitivity Level: 1 (Unlimited)

Compliance Requirements:

RoHS Status: ROHS3 Compliant preferred for new inventory
REACH Status: REACH Unaffected

Substitute parts are grouped into three categories: direct equivalents (identical electrical and package specifications), Vishay alternatives (fast recovery variants with active product status), and package upgrades (SMB package option with enhanced thermal characteristics).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) V	Ir @ Vr (µA)	Speed	Package	Product Status	RoHS
S3D	Micro Commercial Co	200	3	1.2 @ 3A	10 @ 200V	Standard >500ns	DO-214AB, SMC	Obsolete	Non-compliant
S3D-TP	Micro Commercial Co	200	3	1.2 @ 3A	10 @ 200V	Standard >500ns	DO-214AB, SMC	Not For New Designs	ROHS3 Compliant
S3D-E3/57T	Vishay General Semiconductor	200	3	1.15 @ 2.5A	10 @ 200V	Standard >500ns	DO-214AB, SMC	Active	ROHS3 Compliant
S3D-E3/9AT	Vishay General Semiconductor	200	3	1.15 @ 2.5A	10 @ 200V	Standard >500ns	DO-214AB, SMC	Active	ROHS3 Compliant
RS3D-E3/57T	Vishay General Semiconductor	200	3	1.3 @ 2.5A	10 @ 200V	Fast ≤500ns	DO-214AB, SMC	Active	ROHS3 Compliant
RS3D-E3/9AT	Vishay General Semiconductor	200	3	1.3 @ 2.5A	10 @ 200V	Fast ≤500ns	DO-214AB, SMC	Active	ROHS3 Compliant
RS3D-M3/57T	Vishay General Semiconductor	200	3	1.3 @ 2.5A	10 @ 200V	Fast ≤500ns	DO-214AB, SMC	Active	ROHS3 Compliant
RS3D-M3/9AT	Vishay General Semiconductor	200	3	1.3 @ 2.5A	10 @ 100V	Fast ≤500ns	DO-214AB, SMC	Active	ROHS3 Compliant
S3DB-13-F	Diodes Incorporated	200	3	1.15 @ 3A	10 @ 200V	Standard >500ns	DO-214AA, SMB	Active	ROHS3 Compliant
CMR3-02 BK PBFREE	Central Semiconductor Corp	200	3	1.2 @ 3A	5 @ 200V	Standard >500ns	DO-214AB, SMC	Active	ROHS3 Compliant
CMR3-02 TR13 PBFREE	Central Semiconductor Corp	200	3	1.2 @ 3A	5 @ 200V	Standard >500ns	DO-214AB, SMC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Tape & Reel Packaging): S3D-TP from Micro Commercial Co is the direct equivalent to the S3D, maintaining identical electrical specifications and SMC package configuration. S3D-TP carries ROHS3 compliance and is classified as "Not For New Designs," making it suitable for replacement in existing applications where the original part is no longer available.

Vishay Standard Recovery Alternatives: S3D-E3/57T and S3D-E3/9AT from Vishay General Semiconductor provide standard recovery performance matching the original S3D specification. Both parts are active products with ROHS3 compliance. S3D-E3/57T is supplied in cut tape format, while S3D-E3/9AT is supplied in tape and reel format. Forward voltage is slightly lower (1.15 V @ 2.5 A) compared to the S3D specification.

Vishay Fast Recovery Alternatives: RS3D-E3/57T, RS3D-E3/9AT, RS3D-M3/57T, and RS3D-M3/9AT from Vishay General Semiconductor offer fast recovery performance (≤500 ns) with active product status and ROHS3 compliance. These parts are suitable for applications where faster switching characteristics are beneficial. Forward voltage is 1.3 V @ 2.5 A. RS3D-M3/57T and RS3D-M3/9AT are mechanically equivalent variants with identical electrical performance.

Package Upgrade Option: S3DB-13-F from Diodes Incorporated provides a package upgrade to the larger SMB (DO-214AA) format while maintaining 200 V / 3 A electrical specifications. This option offers improved thermal dissipation characteristics and is an active product with ROHS3 compliance. The SMB package is mechanically larger and requires PCB layout modification.

Central Semiconductor Alternative: CMR3-02 BK PBFREE and CMR3-02 TR13 PBFREE from Central Semiconductor Corp are active products with identical electrical specifications to the S3D. Both carry ROHS3 compliance. CMR3-02 BK PBFREE is supplied in bulk packaging, while CMR3-02 TR13 PBFREE is supplied in tape and reel format. Reverse leakage current is lower at 5 µA @ 200 V.

Frequently Asked Questions (FAQ)

Q: Can S3D-TP be used as a direct replacement for S3D? A: Yes. S3D-TP is the direct equivalent, maintaining identical electrical specifications (200 V, 3 A, 1.2 V forward voltage) and SMC package configuration. The primary difference is packaging format (tape and reel versus bulk) and improved RoHS compliance status.

Q: What is the difference between standard recovery and fast recovery variants? A: Standard recovery diodes (S3D, S3D-E3/57T, S3D-E3/9AT) have recovery times greater than 500 ns. Fast recovery diodes (RS3D series) have recovery times of 150 ns or less. Fast recovery variants are suitable for higher frequency switching applications but are not required for standard rectification circuits.

Q: Are Vishay RS3D parts compatible with the original S3D circuit? A: Yes. RS3D parts meet or exceed the electrical requirements of the S3D (200 V reverse voltage, 3 A current rating, 10 µA reverse leakage). The faster recovery time is a performance enhancement that does not create compatibility issues in standard rectification applications.

Q: What is the advantage of the S3DB-13-F SMB package upgrade? A: The SMB (DO-214AA) package is physically larger than SMC (DO-214AB), providing improved thermal dissipation. This upgrade is beneficial in applications with high power dissipation or thermal constraints. PCB layout modification is required for package migration.

Q: Can Central Semiconductor CMR3-02 parts replace the S3D? A: Yes. CMR3-02 BK PBFREE and CMR3-02 TR13 PBFREE meet all electrical requirements of the S3D with identical 200 V / 3 A ratings and SMC package configuration. Both are active products with ROHS3 compliance. Reverse leakage current is lower at 5 µA, which is a performance improvement.

Q: What packaging formats are available for substitute parts? A: Substitute parts are available in three packaging formats: bulk (loose components), cut tape (CT), and tape and reel (TR). Tape and reel format is standard for automated assembly. Cut tape format is suitable for manual assembly or small quantity requirements. Bulk packaging is used for specific applications.

Q: Are all substitute parts RoHS compliant? A: All substitute parts listed carry ROHS3 compliance. The original S3D is RoHS non-compliant. Compliance status is an important consideration for new designs and regulated applications.

Q: What is the operating temperature range for substitute parts? A: Most substitute parts operate from -55°C to 150°C, matching the original S3D specification. CMR3-02 parts from Central Semiconductor extend the upper temperature limit to 175°C, providing enhanced thermal performance in high-temperature environments.

Q: Can multiple substitute parts be used interchangeably in the same circuit? A: Yes, within the constraints of the electrical specifications. All listed substitute parts maintain the 200 V reverse voltage and 3 A current rating. Forward voltage variations (1.15 V to 1.3 V) are within acceptable tolerance for most rectification applications. Recovery time differences do not affect compatibility in standard circuits.

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