S3K V7G Equivalent & Substitute Parts

Part Overview

The S3K V7G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 800 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 3 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	10	µA @ 800 V
Capacitance @ Vr, F	60	pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the S3K V7G is determined by the following critical parameters:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 800 V minimum
Current - Average Rectified (Io): 3 A minimum
Voltage - Forward (Vf) (Max): 1.15 V or lower at rated current
Reverse Recovery Time (trr): Standard recovery characteristics (>500 ns, >200 mA)
Current - Reverse Leakage @ Vr: 10 µA or lower at 800 V

Mechanical Equivalence Criteria:

Package / Case: DO-214AB (SMC) surface mount
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C minimum

Compliance Criteria:

RoHS Status: ROHS3 Compliant
Technology: Standard rectifier diode

Substitute parts are grouped into two categories: direct manufacturer equivalents (same part number from different manufacturers) and parametric equivalents (different part numbers meeting all electrical and mechanical specifications).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
S3K V7G	Taiwan Semiconductor Corporation	800	3	1.15 @ 3 A	1.5	10 @ 800 V	DO-214AB (SMC)	-55 to 150	Discontinued
S3K	Diotec Semiconductor	800	3	1.15 @ 3 A	1.5	5 @ 800 V	DO-214AB (SMC)	-50 to 150	Active
S3KH	Taiwan Semiconductor Corporation	800	3	1.15 @ 3 A	1.5	10 @ 800 V	DO-214AB (SMC)	-55 to 150	Active
S3K-E3/57T	Vishay General Semiconductor - Diodes Division	800	3	1.15 @ 2.5 A	2.5	10 @ 800 V	DO-214AB (SMC)	-55 to 150	Active
S3K-E3/9AT	Vishay General Semiconductor - Diodes Division	800	3	1.15 @ 2.5 A	2.5	10 @ 800 V	DO-214AB (SMC)	-55 to 150	Active
S3K-M3/57T	Vishay General Semiconductor - Diodes Division	800	3	1.15 @ 2.5 A	2.5	10 @ 800 V	DO-214AB (SMC)	-55 to 150	Active
S3K-M3/9AT	Vishay General Semiconductor - Diodes Division	800	3	1.15 @ 2.5 A	2.5	10 @ 800 V	DO-214AB (SMC)	-55 to 150	Active
S3KHE3_A/H	Vishay General Semiconductor - Diodes Division	800	3	1.15 @ 2.5 A	2.5	10 @ 800 V	DO-214AB (SMC)	-55 to 150	Active
S3KHE3_A/I	Vishay General Semiconductor - Diodes Division	800	3	1.15 @ 2.5 A	2.5	10 @ 800 V	DO-214AB (SMC)	-55 to 150	Active

Engineering Selection Recommendations

Primary Substitute: S3KH (Taiwan Semiconductor Corporation)

The S3KH is the direct parametric equivalent to the S3K V7G, manufactured by the same original manufacturer. It maintains identical electrical specifications including 800 V reverse voltage, 3 A average rectified current, 1.15 V forward voltage at 3 A, 1.5 µs reverse recovery time, and 10 µA reverse leakage current. The S3KH is qualified to AEC-Q101 automotive standards and carries active product status. Operating temperature range matches the original part (-55°C to 150°C). This part is available in Tape & Reel packaging and is the preferred direct replacement.

Secondary Substitute: S3K (Diotec Semiconductor)

The S3K from Diotec Semiconductor meets all critical electrical parameters with 800 V reverse voltage and 3 A average rectified current. Forward voltage and reverse recovery time are identical to the original. Reverse leakage current is 5 µA at 800 V, which is superior to the original specification. Operating temperature range is -50°C to 150°C, providing a 5°C reduction at the lower limit. This part is active and available in Cut Tape packaging. RoHS3 compliance is confirmed.

Tertiary Substitutes: Vishay General Semiconductor Diodes Division Parts

The S3K-E3/57T, S3K-E3/9AT, S3K-M3/57T, S3K-M3/9AT, S3KHE3_A/H, and S3KHE3_A/I all meet the core electrical requirements of 800 V reverse voltage and 3 A average rectified current. These parts exhibit forward voltage of 1.15 V at 2.5 A and reverse recovery time of 2.5 µs, which are acceptable for standard rectifier applications. All are active products with RoHS3 compliance and -55°C to 150°C operating temperature range. The S3KHE3_A/H and S3KHE3_A/I variants carry AEC-Q101 automotive qualification. Packaging options include both Cut Tape & Digi-Reel and Tape & Reel formats.

Selection Basis:

All substitute parts maintain compliance with ROHS3 requirements and operate within the specified temperature range. Selection should be based on packaging availability (Cut Tape versus Tape & Reel), inventory levels, and application-specific requirements for automotive qualification where applicable.

Frequently Asked Questions (FAQ)

Q: Can the S3K V7G be directly replaced with the S3KH?

A: Yes. The S3KH is a direct parametric equivalent manufactured by Taiwan Semiconductor Corporation. It maintains identical electrical specifications including 800 V reverse voltage, 3 A average rectified current, 1.15 V forward voltage at 3 A, and 1.5 µs reverse recovery time. Both parts use the DO-214AB (SMC) surface mount package and operate across -55°C to 150°C. The S3KH is the recommended primary substitute.

Q: What is the difference between the S3K from Diotec and the S3K V7G from Taiwan Semiconductor?

A: Both parts meet the core electrical specifications of 800 V reverse voltage and 3 A average rectified current. The Diotec S3K exhibits lower reverse leakage current (5 µA versus 10 µA at 800 V), which is a performance advantage. The operating temperature range differs slightly: Diotec S3K operates from -50°C to 150°C, while the original operates from -55°C to 150°C. Both use identical DO-214AB (SMC) surface mount packaging.

Q: Are the Vishay S3K-E3 and S3K-M3 series parts suitable replacements?

A: Yes. The S3K-E3/57T, S3K-E3/9AT, S3K-M3/57T, and S3K-M3/9AT all meet the electrical requirements of 800 V reverse voltage and 3 A average rectified current. These parts specify forward voltage at 2.5 A (rather than 3 A) and exhibit 2.5 µs reverse recovery time (compared to 1.5 µs in the original). These differences are within acceptable tolerances for standard rectifier applications. All parts use DO-214AB (SMC) surface mount packaging and operate across -55°C to 150°C.

Q: What is the significance of the AEC-Q101 qualification on S3KHE3_A/H and S3KHE3_A/I?

A: AEC-Q101 is an automotive electronics qualification standard. Parts carrying this qualification have undergone additional reliability testing and are suitable for automotive applications. If the original S3K V7G application is non-automotive, AEC-Q101 qualification is not required. If the application is automotive, the S3KHE3_A/H or S3KHE3_A/I variants are appropriate choices.

Q: Does packaging format (Cut Tape versus Tape & Reel) affect electrical performance?

A: No. Packaging format affects only handling, storage, and assembly processes. Electrical and thermal performance are identical between Cut Tape (CT) and Tape & Reel (TR) variants of the same part number. Selection should be based on manufacturing equipment compatibility and inventory management requirements.

Q: Can I use a substitute part with a lower reverse recovery time than the original?

A: Yes. The S3KH and original S3K V7G both specify 1.5 µs reverse recovery time. The Vishay parts (S3K-E3 and S3K-M3 series) specify 2.5 µs, which is longer but acceptable for standard rectifier applications. A longer reverse recovery time does not prevent substitution; it represents a conservative specification. Shorter recovery times would provide performance improvement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance, matching the original S3K V7G specification. This ensures compatibility with environmental and regulatory requirements.

Q: What should I consider when selecting between multiple substitute options?

A: Primary considerations are product status (active versus discontinued), packaging availability (Cut Tape or Tape & Reel), inventory levels, and application-specific requirements. The S3KH is recommended as the primary choice due to identical electrical specifications and active product status from the original manufacturer. Secondary options include the Diotec S3K (superior reverse leakage performance) and Vishay variants (multiple packaging options and automotive qualification where applicable).

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