S4M M6G Equivalent & Substitute Parts

Part Overview

The S4M M6G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 1000 V DC reverse voltage and 4 A average rectified current in a DO-214AB (SMC) surface mount package. This component is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 4 A
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Technology	Standard
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the S4M M6G is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 1000 V
Current - Average Rectified (Io): Must equal or exceed 4 A
Package / Case: Must be DO-214AB (SMC) or compatible surface mount package
Mounting Type: Surface Mount required
RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

Forward voltage characteristics within acceptable operating range
Operating temperature range compatibility
Reverse recovery time and leakage current specifications

Substitute parts are grouped into two categories:

Category A - Direct Package Match (DO-214AB SMC): Parts maintaining identical package geometry and footprint compatibility, enabling direct PCB substitution without layout modification.

Category B - Alternative Package (DO-214AA SMB): Parts with equivalent electrical ratings but different surface mount package, requiring PCB layout adjustment.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	Package	Product Status	Operating Temp (°C)
S4M M6G	Taiwan Semiconductor Corporation	1000 V	4	1.15 V @ 4 A	DO-214AB, SMC	Discontinued	-55 ~ 150
CGRC507-G	Comchip Technology	1000 V	5	1.15 V @ 5 A	DO-214AB, SMC	Active	-55 ~ 150
S3M-13-F	Diodes Incorporated	1000 V	3	1.15 V @ 3 A	DO-214AB, SMC	Active	-65 ~ 150
S3M-TP	Micro Commercial Co	1000 V	3	1.2 V @ 3 A	DO-214AB, SMC	Active	-55 ~ 150
S3MB-13-F	Diodes Incorporated	1000 V	3	1.15 V @ 3 A	DO-214AA, SMB	Active	-65 ~ 150
RS3M-13-F	Diodes Incorporated	1000 V	3	1.3 V @ 3 A	DO-214AB, SMC	Active	-65 ~ 150
RS3MB-13-F	Diodes Incorporated	1000 V	3	1.3 V @ 3 A	DO-214AA, SMB	Active	-65 ~ 150
S3MHE3_A/H	Vishay General Semiconductor - Diodes Division	1000 V	3	1.15 V @ 2.5 A	DO-214AB, SMC	Active	-55 ~ 150
S3MHE3_A/I	Vishay General Semiconductor - Diodes Division	1000 V	3	1.15 V @ 2.5 A	DO-214AB, SMC	Active	-55 ~ 150
S5MC-13-F	Diodes Incorporated	1000 V	5	1.15 V @ 5 A	DO-214AB, SMC	Active	-65 ~ 150
S5MHE3_A/H	Vishay General Semiconductor - Diodes Division	1000 V	5	1.15 V @ 5 A	DO-214AB, SMC	Active	-55 ~ 150

Engineering Selection Recommendations

Direct Replacement (DO-214AB SMC Package):

The CGRC507-G from Comchip Technology provides the closest functional match to the S4M M6G. This part maintains identical voltage rating (1000 V), exceeds current rating (5 A versus 4 A), and preserves the DO-214AB SMC package for direct PCB substitution. The part is currently in active production status with 978 units in stock inventory. Forward voltage characteristics (1.15 V @ 5 A) align with the original specification.

The S5MC-13-F from Diodes Incorporated and S5MHE3_A/H from Vishay General Semiconductor - Diodes Division both provide 5 A current rating in the DO-214AB SMC package with 1000 V voltage rating. Both parts are in active production. The S5MHE3_A/H carries AEC-Q101 automotive qualification and is suitable for applications requiring automotive-grade components.

Current-Limited Substitutes (DO-214AB SMC Package):

For applications where 4 A current capacity is not critical and 3 A rating is acceptable, the S3M-13-F from Diodes Incorporated, S3M-TP from Micro Commercial Co, and S3MHE3_A/H or S3MHE3_A/I from Vishay General Semiconductor - Diodes Division are available. All maintain 1000 V voltage rating and DO-214AB SMC package compatibility. The Vishay parts include AEC-Q101 automotive qualification.

Alternative Package Substitutes (DO-214AA SMB Package):

The S3MB-13-F from Diodes Incorporated and RS3MB-13-F from Diodes Incorporated provide 1000 V, 3 A ratings in the DO-214AA SMB package. These parts require PCB layout modification due to different package footprint but maintain surface mount mounting type and ROHS3 compliance.

Compliance Verification:

All substitute parts listed maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating, matching the original S4M M6G specifications.

Frequently Asked Questions (FAQ)

Q: Can the CGRC507-G directly replace the S4M M6G without PCB modification?

A: Yes. The CGRC507-G maintains the DO-214AB SMC package geometry, enabling direct PCB substitution. The 5 A current rating exceeds the original 4 A specification, providing design margin. Voltage rating (1000 V) and forward voltage characteristics (1.15 V @ 5 A) are equivalent.

Q: What is the difference between DO-214AB (SMC) and DO-214AA (SMB) packages?

A: DO-214AB (SMC) and DO-214AA (SMB) are distinct surface mount package outlines with different physical dimensions and PCB footprints. Parts specified for DO-214AB SMC cannot be directly substituted with DO-214AA SMB packages without PCB layout redesign. The S3MB-13-F and RS3MB-13-F use DO-214AA SMB packages and require layout modification.

Q: Are 3 A rated diodes acceptable substitutes for the 4 A S4M M6G?

A: Substitution of 3 A rated parts for a 4 A application depends on circuit current requirements. If the actual circuit current does not exceed 3 A, parts such as S3M-13-F, S3M-TP, S3MHE3_A/H, and S3MHE3_A/I are functionally acceptable. If circuit current approaches or exceeds 3 A, 5 A rated alternatives (CGRC507-G, S5MC-13-F, S5MHE3_A/H) are recommended to maintain design margin.

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

A: AEC-Q101 qualification indicates the part meets automotive industry reliability and quality standards. Parts such as S3MHE3_A/H, S3MHE3_A/I, and S5MHE3_A/H carry this qualification and are suitable for automotive applications. Non-qualified parts (S3M-13-F, S3M-TP, S5MC-13-F) are suitable for industrial and consumer applications.

Q: How do reverse recovery time specifications affect substitution?

A: The S4M M6G specifies 1.5 µs reverse recovery time (Standard Recovery >500ns). Substitute parts with equivalent or faster recovery times maintain circuit performance. Parts with Standard Recovery classification (>500ns) such as S3M-13-F, S3M-TP, S3MB-13-F, S5MC-13-F, and S5MHE3_A/H are compatible. Parts with Fast Recovery classification (≤500ns) such as RS3M-13-F and RS3MB-13-F provide improved switching characteristics.

Q: What inventory considerations apply to substitute selection?

A: CGRC507-G (978 units), S3M-TP (321,300 units), S3MB-13-F (155,200 units), and S5MC-13-F (15,400 units) maintain substantial inventory levels. S3MHE3_A/H (21,650 units) and S5MHE3_A/H (7,200 units) provide automotive-qualified alternatives with adequate stock. Selection should consider both immediate availability and long-term supply continuity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, matching the original S4M M6G specification. REACH status is unaffected for all parts, and moisture sensitivity level is MSL 1 (Unlimited) across all alternatives.

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