S4G V7G Equivalent & Substitute Parts

Part Overview

The S4G V7G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 4 A average rectified current in a DO-214AB surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Substitute parts must maintain electrical compatibility within the specified voltage and current parameters while accommodating the DO-214AB package format.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	4	A
Voltage - Forward (Vf) (Max) @ If	1.15 @ 4 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Capacitance @ Vr, F	60	pF @ 4V, 1MHz
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 S4G V7G is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a DC reverse voltage rating of 400 V or greater to ensure safe operation in the original circuit application.

Current Rating: Substitute parts must support the 4 A average rectified current requirement. Parts with higher current ratings (5 A) are acceptable as they provide design margin and are electrically compatible.

Package Format: All substitute parts must use the DO-214AB (SMC) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Recovery Characteristics: Standard recovery diodes with reverse recovery times in the range of 1.5 µs to 2.5 µs are acceptable, as both fall within the standard recovery classification.

Temperature Range: Operating temperature range of -55°C to 150°C junction temperature is maintained across all substitute options.

Compliance: All substitute parts must maintain ROHS3 compliance and MSL 1 rating to meet regulatory and manufacturing requirements.

Parameter Comparison

Parameter	S4G V7G (Main)	S4G (Direct)	S5G-M3/57T (Similar)	S5GHE3_A/H (Similar)
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Vishay General Semiconductor	Vishay General Semiconductor
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	4 A	4 A	5 A	5 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 4 A	—	1.15 V @ 5 A	1.15 V @ 5 A
Reverse Recovery Time (trr)	1.5 µs	1.5 µs	2.5 µs	2.5 µs
Current - Reverse Leakage @ Vr	10 µA @ 400 V	100 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V
Capacitance @ Vr, F	60 pF @ 4V, 1MHz	60 pF @ 4V, 1MHz	40 pF @ 4V, 1MHz	40 pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C
Product Status	Discontinued	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT)

Engineering Selection Recommendations

Direct Equivalent (S4G): The S4G from Taiwan Semiconductor Corporation is the direct equivalent to the S4G V7G. Both parts share identical electrical specifications including 400 V reverse voltage, 4 A current rating, 1.5 µs reverse recovery time, and DO-214AB package format. The S4G maintains active product status with 2930 pieces in stock, providing immediate availability. The primary difference is packaging format (Tape & Reel versus Cut Tape & Digi-Reel). This part is the preferred direct replacement.

Higher Current Rating Substitutes (S5G-M3/57T and S5GHE3_A/H): Both Vishay General Semiconductor parts provide 5 A current rating with 400 V reverse voltage in the same DO-214AB package. These parts are electrically compatible with the S4G V7G application, as the higher current rating provides design margin. The S5GHE3_A/H includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components. Reverse recovery time increases to 2.5 µs, which remains within standard recovery classification. Reverse leakage current matches the original specification at 10 µA @ 400 V. Both parts maintain active status and ROHS3 compliance.

Packaging Considerations: The S4G is available in Tape & Reel format, suitable for high-volume automated assembly. The S5GHE3_A/H is available in Cut Tape format, appropriate for lower-volume or manual assembly operations. Selection between these formats depends on production volume and assembly methodology.

Compliance and Regulatory: All substitute parts maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status, ensuring compatibility with current regulatory requirements and manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the S4G directly replace the S4G V7G in all applications?

A: Yes. The S4G is the direct equivalent with identical electrical specifications (400 V, 4 A, 1.5 µs recovery time) and DO-214AB package. The only difference is packaging format (Tape & Reel versus Cut Tape & Digi-Reel). Selection depends on assembly process requirements.

Q: Are the Vishay S5G-M3/57T and S5GHE3_A/H suitable replacements for the S4G V7G?

A: Yes. Both parts maintain 400 V reverse voltage and DO-214AB package compatibility. The 5 A current rating exceeds the 4 A requirement, providing design margin. Reverse recovery time increases from 1.5 µs to 2.5 µs, remaining within standard recovery classification. Both are electrically compatible.

Q: What is the difference between S5G-M3/57T and S5GHE3_A/H?

A: Both parts share identical electrical specifications (400 V, 5 A, 2.5 µs recovery time, DO-214AB package). The S5GHE3_A/H includes AEC-Q101 automotive qualification and is available in Cut Tape format. The S5G-M3/57T is available in Tape & Reel format. Selection depends on application requirements and assembly methodology.

Q: Does the higher current rating of the S5G parts affect circuit operation?

A: No. Higher current rating provides design margin without affecting circuit operation. The diode will operate at the same forward voltage drop and recovery characteristics as the original part when conducting 4 A.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 rating, meeting current regulatory and manufacturing requirements.

Q: What is the impact of the 2.5 µs reverse recovery time in the Vishay parts compared to the 1.5 µs of the original?

A: Both recovery times fall within the standard recovery classification (>500 ns). The 2.5 µs recovery time is acceptable for general-purpose rectification applications. Applications with specific switching frequency or EMI requirements should evaluate circuit performance with the longer recovery time.

Q: Can I use the S5GHE3_A/H in non-automotive applications?

A: Yes. The S5GHE3_A/H is qualified to AEC-Q101 automotive standards but is suitable for any application requiring 400 V, 5 A rectification in DO-214AB package format. Automotive qualification indicates higher reliability and quality standards.

Q: What packaging format should I select for my application?

A: Tape & Reel format (S4G, S5G-M3/57T) is suitable for high-volume automated assembly. Cut Tape format (S5GHE3_A/H) is appropriate for lower-volume or manual assembly operations. Selection depends on production volume and assembly equipment capabilities.

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