S3M M6G Equivalent & Substitute Parts

Part Overview

The S3M M6G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 1000 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 functionally equivalent alternatives from active manufacturers. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating different package formats and recovery characteristics.

Key Parameters

Parameter	S3M M6G Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.15 @ 3 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution logic is based on the following critical parameters:

Voltage Rating: All substitute parts must maintain 1000 V DC reverse voltage specification to ensure dielectric integrity in the application circuit.

Current Rating: Substitute parts are grouped into two categories: (1) 3 A rated parts providing direct current capacity match, and (2) 5 A rated parts providing higher current capacity for applications with margin requirements.

Package Format: The main part uses DO-214AB (SMC) package. Substitutes include identical SMC packages, SMB packages (DO-214AA), and different tape formats (Tape & Reel versus Cut Tape).

Recovery Characteristics: The main part specifies standard recovery (>500 ns). Substitute parts include both standard recovery and fast recovery (≤500 ns) variants. Fast recovery types are electrically compatible but exhibit different switching behavior.

Forward Voltage: Substitute parts range from 1.15 V to 1.3 V at rated current, all within acceptable rectifier diode specifications for general-purpose applications.

Temperature Range: Operating temperature ranges vary from -55°C to -65°C minimum and 150°C maximum, all compatible with the main part's -55°C to 150°C specification.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max)	Speed	Package	Temp Range	Status
S3M M6G	Taiwan Semiconductor Corporation	1000 V	3 A	1.15 V @ 3 A	Standard >500ns	DO-214AB (SMC)	-55 to 150°C	Discontinued
CGRC507-G	Comchip Technology	1000 V	5 A	1.15 V @ 5 A	Standard >500ns	DO-214AB (SMC)	–55 to 150°C	Active
RS3M-13-F	Diodes Incorporated	1000 V	3 A	1.3 V @ 3 A	Fast ≤500ns	DO-214AB (SMC)	-65 to 150°C	Active
RS3MB-13-F	Diodes Incorporated	1000 V	3 A	1.3 V @ 3 A	Fast ≤500ns	DO-214AA (SMB)	-65 to 150°C	Active
S3M-13-F	Diodes Incorporated	1000 V	3 A	1.15 V @ 3 A	Standard >500ns	DO-214AB (SMC)	-65 to 150°C	Active
S3M-TP	Micro Commercial Co	1000 V	3 A	1.2 V @ 3 A	Standard >500ns	DO-214AB (SMC)	-55 to 150°C	Active
S3MB-13-F	Diodes Incorporated	1000 V	3 A	1.15 V @ 3 A	Standard >500ns	DO-214AA (SMB)	-65 to 150°C	Active
S3MHE3_A/H	Vishay General Semiconductor - Diodes Division	1000 V	3 A	1.15 V @ 2.5 A	Standard >500ns	DO-214AB (SMC)	-55 to 150°C	Active
S3MHE3_A/I	Vishay General Semiconductor - Diodes Division	1000 V	3 A	1.15 V @ 2.5 A	Standard >500ns	DO-214AB (SMC)	-55 to 150°C	Active
S5MC-13-F	Diodes Incorporated	1000 V	5 A	1.15 V @ 5 A	Standard >500ns	DO-214AB (SMC)	-65 to 150°C	Active
S5MHE3_A/H	Vishay General Semiconductor - Diodes Division	1000 V	5 A	1.15 V @ 5 A	Standard >500ns	DO-214AB (SMC)	-55 to 150°C	Active

Engineering Selection Recommendations

Direct Replacement (Same Package, Same Current Rating):

S3M-13-F (Diodes Incorporated) and S3M-TP (Micro Commercial Co) provide direct electrical and mechanical compatibility with the S3M M6G. Both maintain 1000 V / 3 A specifications in DO-214AB (SMC) packages with standard recovery characteristics. S3M-13-F offers extended temperature range (-65°C minimum) and higher inventory availability (15,100 units). S3M-TP provides equivalent performance with largest inventory stock (321,300 units).

Automotive-Grade Alternative (Same Package, Same Current Rating):

S3MHE3_A/H and S3MHE3_A/I (Vishay General Semiconductor - Diodes Division) are AEC-Q101 qualified automotive-grade parts with identical electrical specifications. These parts are suitable for applications requiring automotive qualification or enhanced reliability screening. Both are active products with adequate inventory.

Higher Current Capacity (Same Package, Increased Current Rating):

S5MC-13-F (Diodes Incorporated) and S5MHE3_A/H (Vishay General Semiconductor - Diodes Division) provide 5 A current rating in the same DO-214AB (SMC) package. These parts are electrically compatible and suitable for applications requiring current margin or future design scaling. S5MHE3_A/H includes automotive qualification.

Alternative Package Format (Same Current Rating):

S3MB-13-F (Diodes Incorporated) provides identical 1000 V / 3 A specifications in DO-214AA (SMB) package format. This option accommodates PCB layout constraints or design requirements for larger package footprint.

Fast Recovery Alternative (Same Package, Same Current Rating):

RS3M-13-F (Diodes Incorporated) maintains 1000 V / 3 A specifications with fast recovery characteristics (≤500 ns) in DO-214AB (SMC) package. This part is suitable for applications requiring reduced switching losses or higher frequency operation.

All recommended substitutes are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification matching the original part.

Frequently Asked Questions (FAQ)

Q: Can S3M-13-F directly replace S3M M6G without PCB modification?

A: Yes. S3M-13-F maintains identical voltage (1000 V), current (3 A), and package (DO-214AB/SMC) specifications. No PCB layout changes are required. Forward voltage differs by 0.15 V maximum, which is within acceptable tolerance for general-purpose rectifier applications.

Q: What is the difference between standard recovery and fast recovery diodes in this product category?

A: Standard recovery diodes (>500 ns) exhibit longer reverse recovery time, generating higher switching losses at high frequencies. Fast recovery diodes (≤500 ns) reduce switching losses and are suitable for higher frequency applications. Both types are electrically compatible at DC and low-frequency operation. Selection depends on application switching frequency requirements.

Q: Can I use a 5 A rated diode (S5MC-13-F) in place of the 3 A rated S3M M6G?

A: Yes. A 5 A rated diode is electrically compatible with a 3 A application circuit. The higher current rating provides design margin and thermal headroom. No circuit modification is required. This substitution is suitable for applications where future current scaling or thermal performance improvement is desired.

Q: What is the significance of the DO-214AB versus DO-214AA package designation?

A: DO-214AB (SMC) and DO-214AA (SMB) are different surface mount package formats with different footprints and thermal characteristics. SMC packages are smaller; SMB packages are larger. Substitution between these packages requires PCB layout modification. Verify PCB footprint compatibility before selecting SMB alternatives.

Q: Are automotive-grade parts (S3MHE3_A/H) required for non-automotive applications?

A: No. Automotive-grade parts with AEC-Q101 qualification are not required for general-purpose applications. These parts are suitable for applications requiring enhanced reliability screening or automotive compliance. Standard commercial-grade parts (S3M-13-F, S3M-TP) are adequate for general-purpose rectifier applications.

Q: What inventory considerations apply to substitute part selection?

A: S3M-TP (Micro Commercial Co) offers the largest inventory (321,300 units), followed by S3MB-13-F (155,200 units) and S3M-13-F (15,100 units). Inventory levels support different procurement timelines and volume requirements. Verify current inventory status with suppliers before final part selection.

Q: Do all substitute parts meet the same compliance standards as S3M M6G?

A: Yes. All listed substitute parts are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification. All parts are rated for -55°C to 150°C or -65°C to 150°C operating temperature range, meeting or exceeding the original part specification.

Q: Can forward voltage differences between substitute parts affect circuit performance?

A: Forward voltage differences (1.15 V to 1.3 V) are within acceptable tolerance for general-purpose rectifier applications. These differences affect power dissipation and voltage drop across the diode. For precision applications with tight voltage regulation requirements, verify forward voltage specifications against circuit design margins.

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