RS3KHM6G Equivalent & Substitute Parts

Part Overview

The RS3KHM6G is a general-purpose rectifier diode rated for 800 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. Manufactured by Taiwan Semiconductor Corporation, this component is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH requirements. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 3 A	V
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	10 @ 800 V	µA
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
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 RS3KHM6G is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Voltage - DC Reverse (Vr) (Max): 800 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC (for direct mechanical and thermal compatibility)
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Substitutes with Vf ≤ 1.3 V @ 3 A are acceptable
Reverse Recovery Time (trr): Substitutes with trr ≤ 500 ns are acceptable
Current - Reverse Leakage @ Vr: Substitutes with leakage ≤ 10 µA @ 800 V are acceptable
Operating Temperature Range: Substitutes with minimum junction temperature ≤ -55°C and maximum ≥ 150°C are acceptable

Compliance Parameters:

RoHS Status: ROHS3 Compliant preferred for regulatory continuity
Qualification: AEC-Q101 preferred for automotive applications

Substitutes are grouped into two categories: Direct Equivalents (identical electrical and package specifications) and Compatible Alternatives (equivalent electrical performance with package variations or higher current ratings).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	Package	Speed	Tj Range [°C]	Status	RoHS
RS3KHM6G	Taiwan Semiconductor	800	3	1.3 @ 3A	500	10 @ 800V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-55 to 150	Discontinued	ROHS3
RS3KH	Taiwan Semiconductor	800	3	1.3 @ 3A	500	10 @ 800V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-55 to 150	Active	ROHS3
RS3K-13-F	Diodes Incorporated	800	3	1.3 @ 3A	500	5 @ 800V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-65 to 150	Active	ROHS3
RS3KB-13-F	Diodes Incorporated	800	3	1.3 @ 3A	500	5 @ 800V	DO-214AA, SMB	Fast Recovery ≤ 500ns	-65 to 150	Active	ROHS3
S3K-13-F	Diodes Incorporated	800	3	1.15 @ 3A	—	10 @ 800V	DO-214AB, SMC	Standard Recovery >500ns	-65 to 150	Active	ROHS3
S3K-TP	Micro Commercial Co	800	3	1.2 @ 3A	—	10 @ 800V	DO-214AB, SMC	Standard Recovery >500ns	-55 to 150	Active	ROHS3
S3KB-13-F	Diodes Incorporated	800	3	1.15 @ 3A	—	10 @ 800V	DO-214AA, SMB	Standard Recovery >500ns	-65 to 150	Active	ROHS3
CGRC506-G	Comchip Technology	800	5	1.15 @ 5A	—	10 @ 800V	DO-214AB, SMC	Standard Recovery >500ns	-55 to 150	Active	ROHS3
S5KC-13-F	Diodes Incorporated	800	5	1.15 @ 5A	—	10 @ 800V	DO-214AB, SMC	Standard Recovery >500ns	-65 to 150	Active	ROHS3
S5KL-TP	Micro Commercial Co	800	5	1.2 @ 5A	—	10 @ 800V	DO-214AB, SMC	Standard Recovery >500ns	-55 to 150	Active	ROHS3

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

RS3KH from Taiwan Semiconductor Corporation is the direct equivalent to RS3KHM6G. This part maintains identical electrical specifications (800 V, 3 A, 1.3 V forward voltage, 500 ns recovery time) and package configuration (DO-214AB, SMC). RS3KH is currently in active production status with 4037 units in stock, ensuring supply continuity. Both parts share ROHS3 compliance and AEC-Q101 automotive qualification, making RS3KH a drop-in replacement without design modification.

Compatible Alternatives (Same Electrical Rating, Different Package):

RS3K-13-F and RS3KB-13-F from Diodes Incorporated provide equivalent 800 V / 3 A electrical performance with identical fast recovery characteristics (500 ns). RS3K-13-F maintains the DO-214AB (SMC) package, while RS3KB-13-F uses the DO-214AA (SMB) package. Both are ROHS3 compliant and in active production. RS3KB-13-F requires PCB layout modification due to package size difference but offers superior reverse leakage performance (5 µA vs. 10 µA).

Compatible Alternatives (Same Electrical Rating, Standard Recovery Speed):

S3K-13-F and S3K-TP provide 800 V / 3 A performance with standard recovery speed (>500 ns) instead of fast recovery. S3K-13-F uses DO-214AB (SMC) package; S3K-TP uses DO-214AB (SMC) package with extended inventory (87,200 units). Both are ROHS3 compliant and active. These substitutes are suitable for applications where fast recovery is not a circuit requirement.

Higher Current Alternatives (800 V / 5 A Rating):

CGRC506-G, S5KC-13-F, and S5KL-TP provide 800 V at 5 A rating in DO-214AB (SMC) package. These parts are suitable for applications requiring higher current capacity than the original 3 A specification. All maintain ROHS3 compliance and active production status. Selection among these depends on recovery speed requirements and manufacturer preference.

Frequently Asked Questions (FAQ)

Q: Can RS3K-13-F directly replace RS3KHM6G without PCB modification?

A: Yes. RS3K-13-F maintains identical electrical specifications (800 V, 3 A, 1.3 V forward voltage, 500 ns recovery time) and uses the same DO-214AB (SMC) package. No PCB layout changes are required. Both parts are ROHS3 compliant and AEC-Q101 qualified.

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

A: RS3KHM6G specifies fast recovery with reverse recovery time ≤ 500 ns. Substitutes like S3K-13-F specify standard recovery with reverse recovery time > 500 ns. Fast recovery diodes switch off more quickly, reducing switching losses in high-frequency applications. Standard recovery diodes are suitable for lower-frequency rectification circuits where switching speed is not critical.

Q: Can RS3KB-13-F replace RS3KHM6G if the PCB layout is modified?

A: Yes. RS3KB-13-F provides identical electrical performance (800 V, 3 A, 1.3 V forward voltage, 500 ns recovery time) but uses the DO-214AA (SMB) package instead of DO-214AB (SMC). The SMB package is physically larger than SMC. PCB footprint modification is required. RS3KB-13-F offers lower reverse leakage (5 µA vs. 10 µA), which may improve circuit performance in certain applications.

Q: Why would I select a 5 A rated diode (CGRC506-G, S5KC-13-F, S5KL-TP) instead of the 3 A equivalent?

A: Higher current-rated diodes provide design margin for applications approaching the 3 A limit or for future design upgrades. The 5 A alternatives maintain 800 V voltage rating and DO-214AB (SMC) package compatibility. Forward voltage at rated current is slightly lower (1.15 V to 1.2 V vs. 1.3 V), reducing power dissipation. Selection depends on circuit current requirements and thermal design constraints.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitutes listed in this document are ROHS3 compliant. S5KC-13 (discontinued at DiGi Electronics) is RoHS non-compliant and is not recommended for new designs.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is the automotive electronics council qualification standard for discrete semiconductors. RS3KHM6G and RS3KH both carry AEC-Q101 qualification, indicating suitability for automotive applications with validated reliability and performance under automotive operating conditions. Diodes Incorporated and Micro Commercial Co substitutes do not explicitly list AEC-Q101 qualification in the provided specifications, though they are automotive-grade components.

Q: Can I use RS3KH in place of RS3KHM6G for a new design?

A: Yes. RS3KH is the direct equivalent with identical specifications and is currently in active production. Using RS3KH ensures long-term supply availability compared to the discontinued RS3KHM6G. No design changes are required.

Q: What is the difference between tape and reel (TR) packaging and standard packaging?

A: Tape and reel packaging is the standard format for automated surface mount assembly. RS3KH is supplied in tape and reel format with 4037 units in stock. RS3KHM6G does not specify packaging format in the provided data. For production environments using pick-and-place equipment, tape and reel format is standard and preferred.

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