HS3G M6G Equivalent & Substitute Parts

Part Overview

The HS3G M6G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. This part is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing production and maintenance applications. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer functional alternatives within acceptable parameter tolerances for the same application category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the HS3G M6G is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V (exact match required)
Current - Average Rectified (Io): 3 A (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Mounting Type: Surface Mount (exact match required)
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io) (exact match required)
Reverse Recovery Time (trr): 50 ns (exact match required)

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 3 A (tolerance range acceptable)
Current - Reverse Leakage @ Vr: 10 µA @ 400 V (tolerance range acceptable)
Operating Temperature - Junction: -55°C to 150°C (exact match required)
RoHS Status: ROHS3 Compliant (compliance requirement)

Parts are grouped into three categories: parametric equivalents (identical specifications across all parameters), direct manufacturers (alternative sources with matching specifications), and similar parts (matching core electrical ratings with acceptable variations in secondary parameters).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Status
HS3G M6G	Taiwan Semiconductor	400	3	1.3 @ 3A	Fast Recovery ≤ 500ns	50	10 @ 400V	DO-214AB	Discontinued
ES3G V7G	Taiwan Semiconductor	400	3	1.3 @ 3A	Fast Recovery ≤ 500ns	35	10 @ 400V	DO-214AB	Discontinued
HS3G R7G	Taiwan Semiconductor	400	3	1.3 @ 3A	Fast Recovery ≤ 500ns	50	10 @ 400V	DO-214AB	Discontinued
HS3G V7G	Taiwan Semiconductor	400	3	1.3 @ 3A	Fast Recovery ≤ 500ns	50	10 @ 400V	DO-214AB	Discontinued
HS3G-K M6G	Taiwan Semiconductor	400	3	1.3 @ 3A	Fast Recovery ≤ 500ns	50	10 @ 400V	DO-214AB	Active
S3G-TP	Micro Commercial Co	400	3	1.2 @ 3A	Standard Recovery >500ns	—	10 @ 400V	DO-214AB	Not For New Designs
CGRC504-G	Comchip Technology	400	5	1.15 @ 5A	Standard Recovery >500ns	—	10 @ 400V	DO-214AB	Active
CURC304-G	Comchip Technology	400	3	1.3 @ 3A	Fast Recovery ≤ 500ns	50	5 @ 400V	DO-214AB	Active
ES3G-E3/57T	Vishay General Semiconductor	400	3	1.1 @ 3A	Fast Recovery ≤ 500ns	50	10 @ 400V	DO-214AB	Active
ES3G-E3/9AT	Vishay General Semiconductor	400	3	1.1 @ 3A	Fast Recovery ≤ 500ns	50	10 @ 400V	DO-214AB	Active
MURS340S-E3/52T	Vishay General Semiconductor	400	1.5	1.45 @ 3A	Fast Recovery ≤ 500ns	75	5 @ 400V	DO-214AB	Active

Engineering Selection Recommendations

Recommended Primary Substitutes (Parametric Equivalents):

The HS3G-K M6G is the preferred substitute for the discontinued HS3G M6G. This part is manufactured by Taiwan Semiconductor Corporation and maintains identical electrical specifications across all critical parameters: 400 V reverse voltage, 3 A average rectified current, 1.3 V forward voltage at 3 A, 50 ns reverse recovery time, and fast recovery speed classification. The HS3G-K M6G is currently in active product status and available in Tape & Reel (TR) packaging with 1126 pieces in stock. Both parts are ROHS3 compliant and operate across the identical temperature range of -55°C to 150°C.

The ES3G-E3/57T and ES3G-E3/9AT from Vishay General Semiconductor are functionally equivalent alternatives. Both maintain the required 400 V / 3 A specifications, fast recovery speed, and 50 ns reverse recovery time. These parts feature a lower forward voltage specification of 1.1 V at 3 A compared to the 1.3 V maximum of the HS3G M6G, representing an improvement in forward conduction characteristics. Both are ROHS3 compliant and active in production status. ES3G-E3/9AT is available in higher quantity (287,100 pieces) in Tape & Reel packaging.

Secondary Substitutes (Functional Alternatives):

The CURC304-G from Comchip Technology meets all primary electrical specifications: 400 V reverse voltage, 3 A average rectified current, 1.3 V forward voltage at 3 A, fast recovery speed, and 50 ns reverse recovery time. This part is currently active in production status with 3,896 pieces in stock. The reverse leakage current is specified at 5 µA at 400 V, which is lower than the 10 µA specification of the HS3G M6G, representing an improvement in leakage characteristics.

Not Recommended for Direct Substitution:

The S3G-TP from Micro Commercial Co does not meet the speed classification requirement. Although it maintains the 400 V / 3 A electrical ratings and DO-214AB package, it is classified as Standard Recovery (>500ns) rather than Fast Recovery (≤500ns). This part is marked as Not For New Designs and does not qualify as a direct substitute.

The MURS340S-E3/52T from Vishay General Semiconductor is rated for only 1.5 A average rectified current, which is insufficient for applications requiring the full 3 A capability of the HS3G M6G.

The CGRC504-G from Comchip Technology is rated for 5 A average rectified current, exceeding the 3 A specification of the HS3G M6G. While this part maintains the 400 V reverse voltage and DO-214AB package, the higher current rating and Standard Recovery speed classification make it unsuitable as a direct substitute.

Frequently Asked Questions (FAQ)

Q: Can the HS3G-K M6G be used as a direct replacement for the HS3G M6G?

A: Yes. The HS3G-K M6G is a parametric equivalent with identical electrical specifications across all critical parameters: 400 V reverse voltage, 3 A average rectified current, 1.3 V forward voltage at 3 A, 50 ns reverse recovery time, and fast recovery speed classification. The primary difference is product status (active versus discontinued) and packaging format (Tape & Reel versus unspecified). Both parts are ROHS3 compliant and operate across -55°C to 150°C.

Q: What is the difference between the ES3G-E3/57T and ES3G-E3/9AT?

A: Both parts are functionally identical in electrical specifications. The primary difference is packaging format: ES3G-E3/57T is supplied in Cut Tape (CT) packaging with 80,850 pieces in stock, while ES3G-E3/9AT is supplied in Tape & Reel (TR) packaging with 287,100 pieces in stock. Selection between these variants depends on assembly process requirements and volume needs.

Q: Why is the S3G-TP not recommended as a substitute?

A: The S3G-TP does not meet the speed classification requirement. It is specified as Standard Recovery (>500ns) rather than Fast Recovery (≤500ns), which is a primary substitution criterion. Additionally, this part is marked as Not For New Designs, indicating it is being phased out.

Q: Can a higher-current rated diode like the CGRC504-G (5 A) be used in place of the HS3G M6G (3 A)?

A: No. The CGRC504-G is not a suitable substitute. Although it maintains the 400 V reverse voltage and DO-214AB package, it exceeds the 3 A current specification and is classified as Standard Recovery (>500ns) rather than Fast Recovery (≤500ns). Using an oversized component introduces unnecessary cost and may affect circuit performance characteristics.

Q: What does "Fast Recovery ≤ 500ns, > 200mA (Io)" mean?

A: This specification indicates the diode exhibits fast recovery characteristics with a reverse recovery time of 500 nanoseconds or less when conducting currents greater than 200 milliamps. This parameter is critical for high-frequency switching applications and power supply circuits where switching speed directly impacts efficiency and electromagnetic interference performance.

Q: Are all recommended substitutes ROHS3 compliant?

A: Yes. All recommended substitute parts—HS3G-K M6G, ES3G-E3/57T, ES3G-E3/9AT, and CURC304-G—are ROHS3 compliant. This compliance status matches the original HS3G M6G and ensures compatibility with environmental and regulatory requirements.

Q: What is the significance of the forward voltage difference between the HS3G M6G (1.3 V) and ES3G variants (1.1 V)?

A: The ES3G variants feature a lower maximum forward voltage specification of 1.1 V at 3 A compared to 1.3 V for the HS3G M6G. This represents an improvement in forward conduction efficiency, resulting in lower power dissipation during operation. This difference is acceptable for substitution purposes and may provide thermal benefits in power-sensitive applications.

Q: Does the reverse leakage current difference between parts affect substitution suitability?

A: The reverse leakage current specification is a secondary compatibility parameter. The HS3G M6G specifies 10 µA at 400 V, while the CURC304-G specifies 5 µA at 400 V. The lower leakage current of the CURC304-G represents an improvement and does not preclude substitution. Both values are within acceptable ranges for general-purpose rectifier applications.

Q: What packaging options are available for equivalent parts?

A: Equivalent parts are available in three packaging formats: Cut Tape (CT), Tape & Reel (TR), and unspecified packaging. Cut Tape is suitable for small-volume manual assembly or reel-to-reel feeding systems. Tape & Reel is standard for high-volume automated assembly processes. Selection depends on production volume, assembly equipment capabilities, and inventory management requirements.

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