Equivalent & Substitute Parts for RS3G R7G

Part Overview

The RS3G R7G 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, which necessitates identification of equivalent and substitute components for ongoing production and maintenance applications. The diode features fast recovery characteristics with a reverse recovery time of 150 ns and operates across a junction temperature range of -55°C to 150°C. Equivalent alternatives are available from multiple manufacturers with matching or superior electrical specifications and the same package footprint.

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 @ 3 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	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	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the RS3G R7G is determined by strict equivalence in the following critical parameters:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 3 A
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C minimum

Secondary Compatibility Parameters:

Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr): 150 ns or lower
Current - Reverse Leakage @ Vr: 10 µA @ 400 V or lower
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parts are grouped into three categories:

Parametric Equivalents: Parts from Taiwan Semiconductor Corporation (ES3G V7G, HS3G R7G, HS3G V7G) that match all primary criteria with identical electrical performance and package specifications.

Direct Manufacturer Equivalent: RS3GH from Taiwan Semiconductor Corporation, which maintains identical electrical specifications and adds automotive-grade qualification (AEC-Q101), representing an active product status alternative.

Direct Substitute: S3G-TP from Micro Commercial Co, which meets primary voltage, current, and package requirements with standard recovery speed classification.

Similar Alternatives: CFRC304-G (Comchip Technology), CGRC504-G (Comchip Technology), MURS340S variants (Vishay), and RS3G-13-F (Diodes Incorporated) provide functional equivalence with variations in current rating, recovery speed, or reverse leakage characteristics.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
RS3G R7G	Taiwan Semiconductor	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	10 @ 400 V	DO-214AB, SMC	-55 to 150	Discontinued
ES3G V7G	Taiwan Semiconductor	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	35	10 @ 400 V	DO-214AB, SMC	-55 to 150	Discontinued
HS3G R7G	Taiwan Semiconductor	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	50	10 @ 400 V	DO-214AB, SMC	-55 to 150	Discontinued
HS3G V7G	Taiwan Semiconductor	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	50	10 @ 400 V	DO-214AB, SMC	-55 to 150	Discontinued
RS3GH	Taiwan Semiconductor	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	10 @ 400 V	DO-214AB, SMC	-55 to 150	Active
S3G-TP	Micro Commercial Co	400	3	1.2 @ 3 A	Standard Recovery >500ns	—	10 @ 400 V	DO-214AB, SMC	-55 to 150	Not For New Designs
CFRC304-G	Comchip Technology	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	5 @ 400 V	DO-214AB, SMC	—	Active
CGRC504-G	Comchip Technology	400	5	1.15 @ 5 A	Standard Recovery >500ns	—	10 @ 400 V	DO-214AB, SMC	—	Active
MURS340S-E3/52T	Vishay General Semiconductor	400	1.5	1.45 @ 3 A	Fast Recovery ≤ 500ns	75	5 @ 400 V	DO-214AB, SMC	-65 to 175	Active
MURS340S-E3/5BT	Vishay General Semiconductor	400	1.5	1.45 @ 3 A	Fast Recovery ≤ 500ns	75	5 @ 400 V	DO-214AB, SMC	-65 to 175	Active
RS3G-13-F	Diodes Incorporated	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	5 @ 400 V	DO-214AB, SMC	-65 to 150	Active

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement:

RS3GH from Taiwan Semiconductor Corporation is the optimal substitute for the discontinued RS3G R7G. This part maintains identical electrical specifications (400 V, 3 A, 1.3 V forward voltage, 150 ns reverse recovery time) and package configuration (DO-214AB, SMC). RS3GH holds active product status and includes automotive-grade qualification per AEC-Q101, providing enhanced reliability for applications requiring automotive-level component assurance. Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Secondary Recommendation for Parametric Equivalence:

RS3G-13-F from Diodes Incorporated provides full parametric equivalence with active product status. This part matches the 400 V, 3 A, 1.3 V specifications and fast recovery characteristics. RS3G-13-F offers an extended lower operating temperature limit (-65°C versus -55°C) and reduced reverse leakage current (5 µA versus 10 µA at 400 V), representing improved performance margins. The part is available in Cut Tape and Digi-Reel packaging formats.

Alternative Parametric Equivalents:

ES3G V7G and HS3G variants (R7G and V7G) from Taiwan Semiconductor Corporation provide full electrical equivalence with improved reverse recovery time characteristics (35 ns and 50 ns respectively, compared to 150 ns). These parts are discontinued at DiGi Electronics but maintain identical voltage, current, and package specifications. Selection of these alternatives is appropriate when faster switching performance is required within the same thermal and electrical envelope.

Functional Alternatives with Current Rating Variations:

CFRC304-G from Comchip Technology matches the 400 V, 3 A, 1.3 V specifications with active product status and reduced reverse leakage (5 µA). This part is suitable for direct substitution in applications where the lower leakage current provides performance benefits.

CGRC504-G from Comchip Technology provides 400 V rated voltage with increased current capacity (5 A) and is appropriate for applications requiring higher current handling with the same voltage rating. This part uses standard recovery speed classification and reduced forward voltage (1.15 V @ 5 A).

Not Recommended for New Designs:

S3G-TP from Micro Commercial Co is classified as "Not For New Designs" and exhibits standard recovery speed (>500ns) versus the fast recovery specification of the original part. This alternative is suitable only for legacy system maintenance where recovery speed is not a critical parameter.

Current-Limited Alternatives:

MURS340S variants from Vishay General Semiconductor (both -E3/52T and -E3/5BT) are rated for 1.5 A average rectified current, representing a 50% reduction from the 3 A specification. These parts are appropriate only for applications where the lower current rating is acceptable and where the extended operating temperature range (-65°C to 175°C) provides system benefits.

Frequently Asked Questions (FAQ)

Q: Can ES3G V7G be used as a direct replacement for RS3G R7G?

A: Yes. ES3G V7G meets all primary equivalence criteria: 400 V reverse voltage, 3 A average rectified current, 1.3 V forward voltage at 3 A, and DO-214AB SMC package. The reverse recovery time of 35 ns is superior to the original 150 ns specification, indicating faster switching performance within the same electrical and thermal envelope. Both parts are ROHS3 compliant with MSL 1 rating.

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

A: Fast recovery diodes exhibit reverse recovery time ≤ 500 ns at currents > 200 mA. Standard recovery diodes have reverse recovery time > 500 ns. The RS3G R7G specifies fast recovery with 150 ns trr. Substitutes must maintain this classification unless the application circuit design has been verified to tolerate slower switching characteristics. S3G-TP uses standard recovery speed and is not recommended as a direct replacement without circuit analysis.

Q: Is RS3GH suitable for automotive applications?

A: Yes. RS3GH carries automotive-grade qualification per AEC-Q101 and maintains identical electrical specifications to RS3G R7G (400 V, 3 A, 1.3 V, 150 ns trr). The AEC-Q101 qualification indicates compliance with automotive reliability and quality standards. RS3GH is the recommended substitute for applications requiring automotive-level component assurance.

Q: Why is reverse leakage current important in diode selection?

A: Reverse leakage current (Ir) determines the magnitude of current flowing through the diode when reverse biased. Lower reverse leakage reduces power dissipation and heat generation in the reverse-biased state. RS3G R7G specifies 10 µA @ 400 V. Substitutes with lower leakage (such as RS3G-13-F at 5 µA or CFRC304-G at 5 µA) provide improved efficiency margins. Higher leakage alternatives are not recommended unless the application circuit has been designed to accommodate increased reverse current.

Q: Can CGRC504-G replace RS3G R7G in a 3 A application?

A: CGRC504-G is rated for 5 A average rectified current at 400 V, which exceeds the 3 A requirement. However, this part uses standard recovery speed (>500ns) versus the fast recovery specification of RS3G R7G. CGRC504-G is suitable only if the application circuit has been verified to tolerate standard recovery speed characteristics. The forward voltage is lower (1.15 V @ 5 A), which may affect circuit performance if the design depends on the 1.3 V specification.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean?

A: MSL 1 (Unlimited) indicates that the component has no moisture sensitivity limitations and does not require special handling, storage, or baking procedures prior to soldering. All recommended substitutes carry MSL 1 rating, ensuring compatibility with standard manufacturing and storage practices.

Q: Are there packaging format differences between substitute parts?

A: Yes. The original RS3G R7G does not specify packaging format. Substitute parts are available in multiple formats: Cut Tape (CT), Tape & Reel (TR), and unspecified formats. ES3G V7G, HS3G R7G, and HS3G V7G are available in Cut Tape. RS3GH is supplied in Tape & Reel. S3G-TP, CFRC304-G, CGRC504-G, and MURS340S variants are supplied in Tape & Reel. RS3G-13-F is available in Cut Tape and Digi-Reel format. Packaging selection should match manufacturing equipment and inventory management requirements.

Q: What is the significance of the operating temperature range difference between RS3G R7G (-55°C to 150°C) and RS3G-13-F (-65°C to 150°C)?

A: RS3G-13-F extends the lower operating temperature limit by 10°C, providing a wider usable temperature range. This is beneficial for applications operating in cold environments or where thermal margin is critical. The upper temperature limit remains identical at 150°C. The extended range does not affect substitution suitability; it represents an improvement in operational flexibility.

Q: Why is MURS340S not recommended as a direct replacement?

A: MURS340S variants are rated for 1.5 A average rectified current, which is 50% below the 3 A specification of RS3G R7G. Direct substitution would result in insufficient current capacity and potential component failure or thermal stress. MURS340S is suitable only for applications where the lower current rating has been verified as acceptable through circuit analysis and thermal modeling.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message