S3J Equivalent & Substitute Parts Reference

Part Overview

The S3J is a general-purpose rectifier diode rated for 600 V DC reverse voltage and 3 A average rectified current in a surface mount SMC (DO-214AB) package. Manufactured by Micro Commercial Co, this component is classified as obsolete product status. Due to its obsolete designation, equivalent and substitute parts from active product lines are necessary for ongoing design support, procurement continuity, and new production requirements. Substitute parts maintain the core electrical specifications while offering improved availability, compliance certifications, and in some cases enhanced performance characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 3 A	V
Current - Reverse Leakage @ Vr	10	µA @ 600 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55°C ~ 150°C	°C
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitute parts for the S3J are grouped into two categories based on substitution logic:

Direct Substitutes (Same Base Specifications)

Direct substitutes maintain identical electrical ratings: 600 V reverse voltage, 3 A average rectified current, and compatible DO-214AB SMC package footprint. These parts are selected based on matching voltage and current specifications, which are the primary parameters determining functional equivalence in rectifier diode applications. Direct substitutes include packaging variants (Tape & Reel, Cut Tape) of the same base part numbers from Micro Commercial Co and Vishay General Semiconductor.

Upgrade Substitutes (Enhanced Performance)

Upgrade substitutes meet or exceed the core electrical specifications while offering improved characteristics such as faster recovery time, lower forward voltage, or extended temperature range. These parts are suitable for applications where the original S3J specifications are met and additional performance benefits are acceptable. Upgrade substitutes include the MURS360 series and RS3JB-13-F, which provide faster switching characteristics or alternative package options while maintaining voltage and current ratings.

Key Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 3 A
Mounting Type: Surface Mount
Package / Case: DO-214AB, SMC (or compatible SMB for package variants)
Operating Temperature Range: -55°C minimum to 150°C minimum

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max)	Speed	Package	Product Status	RoHS Status
S3J	Micro Commercial Co	600 V	3 A	1.2 V @ 3 A	Standard Recovery >500ns	DO-214AB, SMC	Obsolete	Non-compliant
S3J-TP	Micro Commercial Co	600 V	3 A	1.2 V @ 3 A	Standard Recovery >500ns	DO-214AB, SMC	Active	ROHS3 Compliant
RS3J-E3/57T	Vishay General Semiconductor	600 V	3 A	1.3 V @ 2.5 A	Fast Recovery ≤500ns	DO-214AB, SMC	Active	ROHS3 Compliant
RS3J-E3/9AT	Vishay General Semiconductor	600 V	3 A	1.3 V @ 2.5 A	Fast Recovery ≤500ns	DO-214AB, SMC	Active	ROHS3 Compliant
RS3J-M3/57T	Vishay General Semiconductor	600 V	3 A	1.3 V @ 2.5 A	Fast Recovery ≤500ns	DO-214AB, SMC	Active	ROHS3 Compliant
RS3J-M3/9AT	Vishay General Semiconductor	600 V	3 A	1.3 V @ 2.5 A	Fast Recovery ≤500ns	DO-214AB, SMC	Active	ROHS3 Compliant
S3J-E3/57T	Vishay General Semiconductor	600 V	3 A	1.15 V @ 2.5 A	Standard Recovery >500ns	DO-214AB, SMC	Active	ROHS3 Compliant
S3J-E3/9AT	Vishay General Semiconductor	600 V	3 A	1.15 V @ 2.5 A	Standard Recovery >500ns	DO-214AB, SMC	Active	ROHS3 Compliant
MURS360-E3/57T	Vishay General Semiconductor	600 V	3 A	1.28 V @ 3 A	Fast Recovery ≤500ns	DO-214AB, SMC	Active	ROHS3 Compliant
MURS360-E3/9AT	Vishay General Semiconductor	600 V	3 A	1.28 V @ 3 A	Fast Recovery ≤500ns	DO-214AB, SMC	Active	ROHS3 Compliant
RS3JB-13-F	Diodes Incorporated	600 V	3 A	1.3 V @ 3 A	Fast Recovery ≤500ns	DO-214AA, SMB	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement with Compliance Upgrade:

The S3J-TP from Micro Commercial Co provides direct electrical and mechanical compatibility with the obsolete S3J while offering active product status and ROHS3 compliance. This part is the primary recommendation for applications requiring minimal design changes and maximum form-factor compatibility.

For Active Product Line with Vishay Sourcing:

The S3J-E3/57T and S3J-E3/9AT from Vishay General Semiconductor maintain the standard recovery speed characteristic of the original S3J while providing active product status and ROHS3 compliance. These parts are available in Cut Tape and Tape & Reel packaging options. The S3J-E3 variants offer slightly lower forward voltage (1.15 V @ 2.5 A) compared to the original specification.

For Enhanced Performance with Faster Recovery:

The RS3J series (RS3J-E3/57T, RS3J-E3/9AT, RS3J-M3/57T, RS3J-M3/9AT) from Vishay General Semiconductor provides fast recovery characteristics (≤500ns) with 250 ns reverse recovery time. These parts are suitable for applications where improved switching performance is beneficial within the same voltage and current ratings.

For Extended Temperature Range Operation:

The MURS360-E3/57T and MURS360-E3/9AT from Vishay General Semiconductor extend the operating temperature range to -65°C ~ 175°C and provide fast recovery characteristics with 75 ns reverse recovery time. These upgrade substitutes are appropriate for applications requiring enhanced thermal performance.

For Alternative Package Consideration:

The RS3JB-13-F from Diodes Incorporated provides a DO-214AA SMB package alternative while maintaining 600 V / 3 A specifications and fast recovery characteristics. This part is suitable for applications where SMB package footprint is acceptable or preferred.

Compliance Consideration:

All substitute parts listed are ROHS3 compliant and REACH unaffected, addressing the non-compliance status of the original S3J. Selection should prioritize active product status parts to ensure long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can S3J-TP be used as a direct replacement for S3J?

A: Yes. The S3J-TP maintains identical electrical specifications (600 V, 3 A) and package format (DO-214AB SMC). The primary differences are active product status and ROHS3 compliance. Packaging options differ (Tape & Reel for S3J-TP versus bulk for original S3J), but the component itself is electrically and mechanically equivalent.

Q: What is the difference between standard recovery and fast recovery diodes in these substitutes?

A: Recovery speed refers to the time required for the diode to transition from conducting to blocking state. Standard recovery diodes (S3J, S3J-E3 variants) have recovery times >500ns, while fast recovery diodes (RS3J series, MURS360 series) have recovery times ≤500ns. Fast recovery diodes are beneficial in high-frequency switching applications but are not required for all applications. Both types meet the 600 V / 3 A specifications.

Q: Are the Vishay S3J-E3 parts identical to the original Micro Commercial Co S3J?

A: The Vishay S3J-E3/57T and S3J-E3/9AT maintain the same base part number (S3J) and electrical ratings (600 V, 3 A, standard recovery). Minor differences exist in forward voltage specification (1.15 V @ 2.5 A versus 1.2 V @ 3 A) and capacitance (60pF @ 4V, 1MHz). These differences are within acceptable tolerance for general-purpose rectifier applications.

Q: What is the significance of the packaging suffix (TP, E3/57T, E3/9AT, M3/57T, M3/9AT)?

A: Packaging suffixes indicate the tape format and reel configuration for automated assembly. TP indicates Tape & Reel packaging. E3/57T indicates Cut Tape format. E3/9AT and M3/9AT indicate Tape & Reel format with different reel specifications. The electrical performance of the diode is identical across these packaging variants; selection depends on assembly equipment compatibility and procurement requirements.

Q: Can RS3JB-13-F be used in place of S3J despite the different package (SMB versus SMC)?

A: RS3JB-13-F uses a DO-214AA SMB package instead of the DO-214AB SMC package of the original S3J. While both are surface mount packages with similar footprints, they are not identical. PCB layout and assembly equipment must be compatible with the SMB package. Electrical specifications (600 V, 3 A, fast recovery) are maintained. This substitution requires PCB design verification.

Q: Why do some substitutes show different forward voltage specifications at different current levels?

A: Forward voltage varies with current level due to the semiconductor junction characteristics. The original S3J specifies 1.2 V @ 3 A, while some substitutes specify 1.3 V @ 2.5 A or 1.15 V @ 2.5 A. These variations are within normal manufacturing tolerance for general-purpose rectifier diodes and do not affect functional compatibility in most applications. Circuit design should account for the specified forward voltage drop at the intended operating current.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All substitute parts listed (S3J-TP, RS3J series, S3J-E3 series, MURS360 series, RS3JB-13-F) are ROHS3 compliant. The original S3J is RoHS non-compliant. This compliance upgrade is a key advantage of transitioning to substitute parts for new production and design updates.

Q: What inventory levels should be considered when selecting between substitute options?

A: Inventory availability is provided for reference. S3J-TP shows 39,720 pieces in stock, S3J-E3/57T shows 15,200 pieces, and MURS360-E3/57T shows 18,300 pieces. Higher inventory levels may indicate better long-term availability. However, component selection should be based primarily on electrical specifications, package compatibility, and compliance requirements rather than inventory levels alone.

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