S3A M6G Equivalent & Substitute Parts

Part Overview

The S3A M6G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design and procurement requirements. Equivalent parts maintain identical electrical specifications and package compatibility, while substitute parts offer functional alternatives with variations in secondary parameters such as recovery time or capacitance characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 3 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the S3A M6G is determined by the following critical parameters:

Primary Electrical Specifications:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 3 A
Mounting Type: Surface Mount
Package / Case: DO-214AB (SMC)

Secondary Electrical Characteristics:

Voltage - Forward (Vf) (Max) @ If
Reverse Recovery Time (trr)
Current - Reverse Leakage @ Vr
Operating Temperature Range

Parts are classified into two categories:

Parametric Equivalents: Parts with identical primary electrical specifications (50 V, 3 A, DO-214AB SMC) and matching forward voltage characteristics. These parts are direct functional replacements.

Similar Parts: Parts with identical voltage and current ratings but variations in recovery time, forward voltage, or capacitance. These parts are functionally compatible but exhibit different switching or leakage characteristics. Additionally, parts with higher current ratings (5 A) are included as similar alternatives suitable for applications with current margin requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Ir @ Vr	Package	Product Status
S3A M6G	Taiwan Semiconductor Corporation	50 V	3 A	1.15 V @ 3 A	1.5 µs	5 µA @ 50 V	DO-214AB (SMC)	Discontinued
S3A	Diodes Incorporated	50 V	3 A	1.15 V @ 3 A	2 µs	10 µA @ 50 V	DO-214AB (SMC)	Obsolete
S3AH	Taiwan Semiconductor Corporation	50 V	3 A	1.15 V @ 3 A	1.5 µs	10 µA @ 50 V	DO-214AB (SMC)	Active
CGRC501-G	Comchip Technology	50 V	5 A	1.15 V @ 5 A	—	10 µA @ 50 V	DO-214AB (SMC)	Active
ES3A-13-F	Diodes Incorporated	50 V	3 A	900 mV @ 3 A	25 ns	10 µA @ 50 V	DO-214AB (SMC)	Active
ES3AB-13-F	Diodes Incorporated	50 V	3 A	900 mV @ 3 A	25 ns	10 µA @ 50 V	DO-214AA (SMB)	Active
RS3A-13-F	Diodes Incorporated	50 V	3 A	1.3 V @ 3 A	150 ns	5 µA @ 50 V	DO-214AB (SMC)	Active
RS3A-E3/57T	Vishay General Semiconductor - Diodes Division	50 V	3 A	1.3 V @ 2.5 A	150 ns	10 µA @ 50 V	DO-214AB (SMC)	Active
RS3A-E3/9AT	Vishay General Semiconductor - Diodes Division	50 V	3 A	1.3 V @ 2.5 A	150 ns	10 µA @ 50 V	DO-214AB (SMC)	Active
RS3A-M3/57T	Vishay General Semiconductor - Diodes Division	50 V	3 A	1.3 V @ 2.5 A	150 ns	10 µA @ 50 V	DO-214AB (SMC)	Active
RS3A-M3/9AT	Vishay General Semiconductor - Diodes Division	50 V	3 A	1.3 V @ 2.5 A	150 ns	10 µA @ 50 V	DO-214AB (SMC)	Active

Engineering Selection Recommendations

Parametric Equivalent - Recommended Primary Choice:

The S3AH (Taiwan Semiconductor Corporation) is the parametric equivalent with active product status. This part maintains identical voltage and current ratings, matching forward voltage characteristics at 1.15 V @ 3 A, and identical reverse recovery time of 1.5 µs. The S3AH is AEC-Q101 qualified for automotive applications and carries ROHS3 compliance. This part is suitable for direct replacement in applications where the original S3A M6G specifications are required.

Active Substitutes - Standard Recovery Technology:

The S3A (Diodes Incorporated) is an obsolete parametric equivalent with identical electrical specifications except for reverse recovery time (2 µs versus 1.5 µs). This part is functionally compatible but exhibits slightly slower recovery characteristics.

Active Substitutes - Fast Recovery Technology:

The ES3A-13-F and ES3AB-13-F (Diodes Incorporated) are fast recovery variants with 25 ns reverse recovery time, significantly faster than the original part. These parts feature reduced forward voltage (900 mV @ 3 A) and are suitable for applications requiring improved switching performance. The ES3AB-13-F uses DO-214AA (SMB) packaging and is not compatible with DO-214AB (SMC) footprints.

The RS3A series (Vishay General Semiconductor - Diodes Division) comprises fast recovery variants with 150 ns reverse recovery time and 1.3 V forward voltage. Multiple packaging options are available: RS3A-13-F, RS3A-E3/57T, RS3A-E3/9AT, RS3A-M3/57T, and RS3A-M3/9AT. All maintain DO-214AB (SMC) package compatibility.

Higher Current Alternative:

The CGRC501-G (Comchip Technology) is rated for 5 A average rectified current at 50 V reverse voltage, providing current margin for applications with higher load requirements. This part maintains DO-214AB (SMC) package compatibility and is suitable for designs requiring increased current capacity.

Compliance and Availability:

All recommended substitute parts are ROHS3 compliant and REACH unaffected. All parts carry MSL 1 (Unlimited) moisture sensitivity rating. Active product status ensures ongoing availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the S3AH directly replace the S3A M6G?

A: Yes. The S3AH is a parametric equivalent with identical voltage (50 V), current (3 A), forward voltage (1.15 V @ 3 A), and reverse recovery time (1.5 µs) specifications. Both parts use DO-214AB (SMC) packaging. The S3AH is active and AEC-Q101 qualified.

Q: What is the difference between standard recovery and fast recovery variants?

A: Standard recovery diodes (S3A M6G, S3AH) exhibit reverse recovery times of 1.5 to 2 µs. Fast recovery diodes (ES3A-13-F, RS3A series) exhibit reverse recovery times of 25 to 150 ns. Fast recovery variants reduce switching losses and are suitable for high-frequency applications. Forward voltage characteristics may differ.

Q: Are ES3A-13-F and ES3AB-13-F interchangeable?

A: No. ES3A-13-F uses DO-214AB (SMC) packaging, while ES3AB-13-F uses DO-214AA (SMB) packaging. These packages have different footprints and are not mechanically compatible. Verify PCB layout requirements before selection.

Q: Can I use the CGRC501-G (5 A) in place of the S3A M6G (3 A)?

A: Yes, for applications where the circuit design permits higher current capacity. The CGRC501-G maintains 50 V reverse voltage rating and DO-214AB (SMC) packaging. The higher current rating provides design margin but does not reduce the maximum voltage or change package compatibility.

Q: What is the significance of forward voltage differences between parts?

A: Forward voltage affects power dissipation and voltage drop across the diode during conduction. The S3A M6G and S3AH specify 1.15 V @ 3 A, while ES3A variants specify 900 mV @ 3 A and RS3A variants specify 1.3 V @ 2.5 A. Lower forward voltage reduces heat generation; higher forward voltage increases heat generation. Verify thermal design compatibility when selecting alternatives.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in this reference are ROHS3 compliant and REACH unaffected. All parts carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special moisture handling requirements.

Q: What packaging options are available for 50 V, 3 A rectifier diodes?

A: The primary package for this specification is DO-214AB (SMC). The ES3AB-13-F variant is available in DO-214AA (SMB) packaging. Verify PCB footprint compatibility before selection, as these packages are not interchangeable.

Q: Which substitute part has the lowest reverse leakage current?

A: The S3A M6G and RS3A-13-F both specify 5 µA @ 50 V reverse leakage current. Other parts specify 10 µA @ 50 V. Lower reverse leakage is beneficial in high-impedance circuits and low-power applications.

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