RS3M M6G Equivalent & Substitute Parts

Part Overview

The RS3M M6G is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 3 A average rectified current, packaged in the DO-214AB (SMC) surface mount configuration. Manufactured by Taiwan Semiconductor Corporation, this component is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. The RS3M M6G features fast recovery characteristics with a reverse recovery time of 500 ns, making it suitable for applications requiring rapid switching performance in power conversion and rectification circuits.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A
Speed Classification	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Reverse Recovery Time (trr)	500 ns
Current - Reverse Leakage @ Vr	10 µA @ 1000 V
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RS3M M6G is determined by strict electrical and mechanical parameter matching within the rectifier diode category. The primary substitution criteria are:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB (SMC) or compatible surface mount package
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

Forward voltage (Vf) at rated current must not exceed application requirements
Recovery speed classification (Fast Recovery ≤ 500 ns or Standard Recovery > 500 ns) determines switching performance suitability
Operating temperature range must encompass application requirements
Reverse leakage current specifications must meet circuit design constraints

Substitute parts are grouped into two categories: Direct Electrical Equivalents (matching all primary parameters including recovery speed) and Functional Equivalents (matching voltage and current ratings with alternative recovery characteristics or package variants). Parts with higher current ratings (5 A) are listed as reference alternatives but do not constitute direct substitutes due to current rating mismatch.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ If	Speed	trr	Package	Temp Range	Status
RS3M M6G	Taiwan Semiconductor Corporation	1000 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500 ns	500 ns	DO-214AB (SMC)	-55°C ~ 150°C	Discontinued
S3M-TP	Micro Commercial Co	1000 V	3 A	1.2 V @ 3 A	Standard Recovery > 500 ns	—	DO-214AB (SMC)	-55°C ~ 150°C	Active
CFRC307-G	Comchip Technology	1000 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500 ns	500 ns	DO-214AB (SMC)	-55°C ~ 150°C	Active
RS3M-13-F	Diodes Incorporated	1000 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500 ns	500 ns	DO-214AB (SMC)	-65°C ~ 150°C	Active
RS3MB-13-F	Diodes Incorporated	1000 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500 ns	500 ns	DO-214AA (SMB)	-65°C ~ 150°C	Active
S3M-13-F	Diodes Incorporated	1000 V	3 A	1.15 V @ 3 A	Standard Recovery > 500 ns	—	DO-214AB (SMC)	-65°C ~ 150°C	Active
S3MB-13-F	Diodes Incorporated	1000 V	3 A	1.15 V @ 3 A	Standard Recovery > 500 ns	—	DO-214AA (SMB)	-65°C ~ 150°C	Active
S3MHE3_A/H	Vishay General Semiconductor - Diodes Division	1000 V	3 A	1.15 V @ 2.5 A	Standard Recovery > 500 ns	2.5 µs	DO-214AB (SMC)	-55°C ~ 150°C	Active
S3MHE3_A/I	Vishay General Semiconductor - Diodes Division	1000 V	3 A	1.15 V @ 2.5 A	Standard Recovery > 500 ns	2.5 µs	DO-214AB (SMC)	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (Fast Recovery, 1000 V, 3 A, DO-214AB SMC):

The CFRC307-G (Comchip Technology) and RS3M-13-F (Diodes Incorporated) are direct electrical equivalents to the RS3M M6G. Both parts match the fast recovery speed classification (≤ 500 ns), forward voltage specification (1.3 V @ 3 A), and reverse recovery time (500 ns). These parts are currently in active production status with substantial inventory availability. The RS3M-13-F offers an extended operating temperature range (-65°C ~ 150°C) compared to the original part (-55°C ~ 150°C), providing additional thermal margin for demanding applications.

Functional Equivalents (Standard Recovery, 1000 V, 3 A, DO-214AB SMC):

The S3M-TP (Micro Commercial Co) and S3M-13-F (Diodes Incorporated) provide functional equivalence with standard recovery characteristics (> 500 ns). These parts maintain identical voltage and current ratings but exhibit slower switching performance. The S3M-13-F includes an extended temperature range (-65°C ~ 150°C) and lower forward voltage (1.15 V @ 3 A), offering improved efficiency in applications where switching speed is not critical.

Package Variant Alternatives (Fast Recovery, 1000 V, 3 A, DO-214AA SMB):

The RS3MB-13-F and S3MB-13-F (Diodes Incorporated) provide equivalent electrical performance in the larger DO-214AA (SMB) package. These parts are suitable for applications where PCB layout accommodates the larger footprint. The RS3MB-13-F maintains fast recovery characteristics identical to the original part, while the S3MB-13-F offers standard recovery performance with lower forward voltage.

Automotive-Grade Alternative:

The S3MHE3_A/H and S3MHE3_A/I (Vishay General Semiconductor - Diodes Division) are automotive-qualified alternatives (AEC-Q101) suitable for applications requiring automotive-grade components. These parts feature standard recovery characteristics and lower forward voltage (1.15 V @ 2.5 A) with extended reverse recovery time (2.5 µs).

All recommended substitutes maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring compatibility with modern manufacturing processes and environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can the S3M-TP substitute for the RS3M M6G in all applications?

A: The S3M-TP matches the voltage (1000 V), current (3 A), and package (DO-214AB SMC) specifications of the RS3M M6G. However, it features standard recovery characteristics (> 500 ns) compared to the fast recovery (≤ 500 ns) of the original part. Substitution is valid only in applications where switching speed is not a critical performance parameter. Applications requiring fast switching performance, such as high-frequency power supplies or fast-switching rectifier circuits, require a fast recovery equivalent such as CFRC307-G or RS3M-13-F.

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. The SMC package is smaller than the SMB package. Parts specified for DO-214AB (SMC) cannot be directly substituted with DO-214AA (SMB) variants without PCB redesign. The RS3MB-13-F and S3MB-13-F are SMB package alternatives suitable only for designs that accommodate the larger footprint.

Q: Does the RS3M-13-F offer any advantages over the original RS3M M6G?

A: The RS3M-13-F provides three advantages: (1) active production status with high inventory availability, (2) extended operating temperature range (-65°C ~ 150°C versus -55°C ~ 150°C), and (3) identical fast recovery characteristics (500 ns) and forward voltage specification (1.3 V @ 3 A). The extended temperature range provides additional thermal margin for applications operating at temperature extremes.

Q: Are automotive-qualified parts (S3MHE3_A/H, S3MHE3_A/I) suitable for non-automotive applications?

A: Automotive-qualified parts meeting AEC-Q101 standards are suitable for non-automotive applications. These parts undergo more rigorous qualification testing than standard industrial-grade components, resulting in higher reliability margins. However, automotive-grade parts typically feature standard recovery characteristics (> 500 ns) rather than fast recovery, which may not be suitable for applications requiring rapid switching performance.

Q: What inventory considerations apply to substitute part selection?

A: Inventory availability varies significantly among substitute options. The S3MB-13-F (Diodes Incorporated) offers the highest inventory level (155,200 pcs), followed by S3M-TP (Micro Commercial Co, 321,300 pcs). For applications requiring immediate component availability, these high-inventory options provide supply chain advantages. The CFRC307-G (Comchip Technology, 864 pcs) and S3MHE3_A/H (Vishay, 21,650 pcs) offer moderate inventory levels suitable for standard production volumes.

Q: Can a 5 A rated diode (CGRC507-G, S5MC-13-F) substitute for the 3 A RS3M M6G?

A: A 5 A rated diode does not constitute a direct substitute for a 3 A rated diode. While a higher-rated component can handle the current load, it introduces unnecessary cost and PCB footprint considerations. Substitution should maintain the specified current rating (3 A) unless application requirements explicitly demand higher current capacity. The 5 A alternatives are listed for reference only in applications requiring higher current handling capability.

Q: What compliance certifications are relevant for substitute part selection?

A: All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the environmental and regulatory compliance of the original RS3M M6G. The S3MHE3_A/H and S3MHE3_A/I variants include AEC-Q101 automotive qualification, which is relevant only for applications requiring automotive-grade component certification. Standard industrial applications do not require automotive qualification.

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