S8KCHR7G Equivalent & Substitute Parts

Part Overview

The S8KCHR7G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 800 V DC reverse voltage and 8 A average rectified current in a DO-214AB (SMC) surface mount package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The part carries automotive-grade qualification (AEC-Q101) and is RoHS3 compliant.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	985 mV @ 8 A	mV
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	10	µA @ 800 V
Capacitance @ Vr, F	48	pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the S8KCHR7G is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 800 V minimum
Current - Average Rectified (Io): 8 A minimum
Package / Case: DO-214AB (SMC) surface mount
Mounting Type: Surface Mount
Operating Temperature Range: Must encompass -55°C to 150°C junction temperature

Secondary Compatibility Factors:

Forward voltage (Vf) characteristics at rated current
Recovery speed classification (Standard or Fast Recovery)
Reverse leakage current specifications
Capacitance at rated voltage and frequency

Parametric Equivalent: The S8KC V7G from Taiwan Semiconductor Corporation meets all primary criteria with identical electrical specifications and packaging, differing only in packaging format (Cut Tape & Digi-Reel versus standard packaging).

Similar Substitutes: Parts with reduced current ratings (3 A to 5 A) or alternative package types (SMB) are listed as similar substitutes. These parts maintain the 800 V reverse voltage rating and surface mount configuration but operate at lower current levels or in different package geometries. Selection of these parts requires circuit-level current analysis to confirm adequacy for the application.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [mV]	Package	Speed	Temp Range [°C]	Status
S8KCHR7G	Taiwan Semiconductor Corporation	800	8	985 @ 8A	DO-214AB (SMC)	Standard >500ns	-55 to 150	Discontinued
S8KC V7G	Taiwan Semiconductor Corporation	800	8	985 @ 8A	DO-214AB (SMC)	Standard >500ns	-55 to 150	Discontinued
CGRC506-G	Comchip Technology	800	5	1150 @ 5A	DO-214AB (SMC)	Standard >500ns	-40 to 150	Active
CURC306-G	Comchip Technology	800	3	1700 @ 3A	DO-214AB (SMC)	Fast ≤500ns	-40 to 150	Active
ER3K-TP	Micro Commercial Co	800	3	1700 @ 3A	DO-214AB (SMC)	Fast ≤500ns	-55 to 175	Active
RS3K-13-F	Diodes Incorporated	800	3	1300 @ 3A	DO-214AB (SMC)	Fast ≤500ns	-65 to 150	Active
RS3KB-13-F	Diodes Incorporated	800	3	1300 @ 3A	DO-214AA (SMB)	Fast ≤500ns	-65 to 150	Active
RS3KHE3_A/H	Vishay General Semiconductor	800	3	1300 @ 2.5A	DO-214AB (SMC)	Fast ≤500ns	-55 to 150	Active
RS3KHE3_A/I	Vishay General Semiconductor	800	3	1300 @ 2.5A	DO-214AB (SMC)	Fast ≤500ns	-55 to 150	Active
S3K	Diotec Semiconductor	800	3	1150 @ 3A	DO-214AB (SMC)	Standard >500ns	-50 to 150	Active
S3K-13-F	Diodes Incorporated	800	3	1150 @ 3A	DO-214AB (SMC)	Standard >500ns	-65 to 150	Active

Engineering Selection Recommendations

Direct Parametric Equivalent:

The S8KC V7G from Taiwan Semiconductor Corporation is the direct parametric equivalent to the S8KCHR7G. Both parts share identical electrical specifications (800 V, 8 A, 985 mV forward voltage) and the same DO-214AB surface mount package. The S8KC V7G is currently active in inventory and represents the primary replacement option for applications requiring the full 8 A current rating.

Active Substitutes for Reduced Current Applications:

For applications where circuit analysis confirms that current requirements do not exceed 5 A, the CGRC506-G (Comchip Technology, 5 A rated) provides an active alternative with the same 800 V rating and DO-214AB package.

For applications where current requirements do not exceed 3 A, multiple active alternatives are available:

RS3KHE3_A/H and RS3KHE3_A/I (Vishay General Semiconductor): These parts carry automotive-grade qualification (AEC-Q101) and match the original part's automotive certification status. Operating temperature range is -55°C to 150°C, identical to the S8KCHR7G. Both are RoHS3 compliant.
S3K-13-F (Diodes Incorporated): Offers extended operating temperature range (-65°C to 150°C) and standard recovery speed characteristics. RoHS3 compliant with high inventory availability.
ER3K-TP (Micro Commercial Co): Provides extended upper operating temperature limit (175°C) with fast recovery speed characteristics. RoHS3 compliant.

Package Consideration:

The RS3KB-13-F (Diodes Incorporated) uses the DO-214AA (SMB) package instead of DO-214AB (SMC). This part is suitable only for applications where SMB package footprints are acceptable and where the 3 A current rating is adequate.

Compliance Status:

All recommended substitutes maintain RoHS3 compliance and REACH unaffected status. The automotive-qualified variants (RS3KHE3_A/H, RS3KHE3_A/I) preserve AEC-Q101 certification for applications requiring automotive-grade components.

Frequently Asked Questions (FAQ)

Q: Can the S8KC V7G directly replace the S8KCHR7G in all applications?

A: Yes. The S8KC V7G is a parametric equivalent with identical electrical specifications (800 V, 8 A, 985 mV forward voltage) and the same DO-214AB surface mount package. The only difference is packaging format (Cut Tape & Digi-Reel). No circuit modifications are required.

Q: What is the minimum current rating required for a substitute part?

A: The substitute part must have a current rating equal to or greater than the application's maximum operating current. The S8KCHR7G is rated for 8 A average rectified current. Parts rated below 8 A (such as 3 A or 5 A variants) are suitable only if circuit analysis confirms that the application's actual current demand does not exceed the substitute part's rating.

Q: Are the 3 A rated parts (RS3K-13-F, S3K-13-F, ER3K-TP) suitable replacements?

A: These parts are suitable only if the application's maximum current requirement does not exceed 3 A. All three maintain the 800 V reverse voltage rating and DO-214AB surface mount package. However, they cannot be used in applications requiring the full 8 A capability of the original part.

Q: What is the difference between Standard Recovery and Fast Recovery speed classifications?

A: The S8KCHR7G uses Standard Recovery (>500 ns). Some substitute parts (RS3K-13-F, ER3K-TP, RS3KHE3_A/H, RS3KHE3_A/I) use Fast Recovery (≤500 ns). Fast recovery diodes switch off more quickly, which may affect circuit behavior in high-frequency applications. Verify compatibility with circuit design requirements before substitution.

Q: Does the RS3KB-13-F SMB package substitute work in place of the DO-214AB package?

A: The RS3KB-13-F uses the DO-214AA (SMB) package, which has a different physical footprint than the DO-214AB (SMC) package of the original part. This part is suitable only if the PCB layout accommodates SMB package dimensions. Verify footprint compatibility before selection.

Q: Are automotive-qualified substitutes available?

A: Yes. The RS3KHE3_A/H and RS3KHE3_A/I (Vishay General Semiconductor) carry AEC-Q101 automotive qualification, matching the original part's automotive-grade status. Both are rated for 3 A and maintain the -55°C to 150°C operating temperature range.

Q: What is the inventory status of available substitutes?

A: The S8KC V7G (parametric equivalent) has 1073 pieces in stock. For 3 A rated alternatives, S3K-13-F has the highest inventory (87,200 pieces), followed by RS3KHE3_A/H (95,200 pieces). The CGRC506-G (5 A rated) has 1137 pieces available.

Q: Can I use a substitute part with a higher voltage rating?

A: Yes. A diode rated for higher reverse voltage (Vr) than required can be used as a substitute, provided all other parameters (current rating, package, temperature range) are met or exceeded. However, no substitute parts with voltage ratings higher than 800 V are listed in this reference.

Q: What compliance certifications should I verify for my application?

A: All listed substitute parts are RoHS3 compliant and REACH unaffected. If your application requires automotive-grade components, select only RS3KHE3_A/H or RS3KHE3_A/I, which carry AEC-Q101 qualification. For non-automotive applications, all listed parts meet standard compliance requirements.

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