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S3KHM6G Equivalent & Substitute Parts
Part Overview
The S3KHM6G 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 component is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH requirements.
The S3KHM6G is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers with matching or superior electrical characteristics, enabling continued system design and production support.
Substiute Parts
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 |
| Reverse Recovery Time (trr) | 1.5 | µs |
| Current - Reverse Leakage @ Vr | 5 | µA @ 800 V |
| Package / Case | DO-214AB, SMC | — |
| Operating Temperature - Junction | -55 to 150 | °C |
| Grade | Automotive | — |
| Qualification | AEC-Q101 | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution of the S3KHM6G 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) @ If: 1.15 V or lower at rated current
- Reverse Recovery Time (trr): 1.5 µs or faster
- Current - Reverse Leakage @ Vr: 5 µA or lower at 800 V
Mechanical Compatibility Criteria:
- Package / Case: DO-214AB (SMC) or compatible surface mount package
- Mounting Type: Surface Mount
Compliance Criteria:
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
- REACH Status: REACH Unaffected
Substitute parts are grouped into two categories:
Direct Equivalents: Parts meeting all electrical parameters and maintaining identical package specifications (DO-214AB SMC).
Functional Equivalents: Parts meeting all electrical parameters with alternative surface mount packages (DO-214AA SMB) or from different manufacturers, suitable for applications where package footprint flexibility exists.
Parameter Comparison
| Part Number | Manufacturer | Vr (Max) [V] | Io [A] | Vf (Max) [V] | trr [µs] | Ir @ Vr [µA] | Package | Status | RoHS |
|---|---|---|---|---|---|---|---|---|---|
| S3KHM6G | Taiwan Semiconductor | 800 | 3 | 1.15 @ 3A | 1.5 | 5 @ 800V | DO-214AB (SMC) | Discontinued | ROHS3 |
| S3KH | Taiwan Semiconductor | 800 | 3 | 1.15 @ 3A | 1.5 | 10 @ 800V | DO-214AB (SMC) | Active | ROHS3 |
| S3K V7G | Taiwan Semiconductor | 800 | 3 | 1.15 @ 3A | 1.5 | 10 @ 800V | DO-214AB (SMC) | Discontinued | ROHS3 |
| S3K-13-F | Diodes Incorporated | 800 | 3 | 1.15 @ 3A | >500ns | 10 @ 800V | DO-214AB (SMC) | Active | ROHS3 |
| S3KB-13-F | Diodes Incorporated | 800 | 3 | 1.15 @ 3A | >500ns | 10 @ 800V | DO-214AA (SMB) | Active | ROHS3 |
| RS3K-13-F | Diodes Incorporated | 800 | 3 | 1.3 @ 3A | 0.5 | 5 @ 800V | DO-214AB (SMC) | Active | ROHS3 |
| RS3KB-13-F | Diodes Incorporated | 800 | 3 | 1.3 @ 3A | 0.5 | 5 @ 800V | DO-214AA (SMB) | Active | ROHS3 |
| S3K-TP | Micro Commercial Co | 800 | 3 | 1.2 @ 3A | >500ns | 10 @ 800V | DO-214AB (SMC) | Active | ROHS3 |
| CGRC506-G | Comchip Technology | 800 | 5 | 1.15 @ 5A | >500ns | 10 @ 800V | DO-214AB (SMC) | Active | ROHS3 |
| S5KC-13-F | Diodes Incorporated | 800 | 5 | 1.15 @ 5A | >500ns | 10 @ 800V | DO-214AB (SMC) | Active | ROHS3 |
Engineering Selection Recommendations
Primary Recommendation - Direct Equivalent (Same Manufacturer):
S3KH (Taiwan Semiconductor Corporation) is the primary equivalent for S3KHM6G. Both parts share identical electrical specifications (800 V, 3 A, 1.15 V forward voltage, 1.5 µs recovery time) and package configuration (DO-214AB SMC). S3KH is currently in active production status with 3,761 units in stock. Reverse leakage current is slightly higher (10 µA vs. 5 µA), which remains within acceptable limits for general-purpose rectification applications. Both parts maintain AEC-Q101 automotive qualification and ROHS3 compliance.
Secondary Recommendation - Active Equivalent (Same Manufacturer):
S3K V7G (Taiwan Semiconductor Corporation) provides parametric equivalence with identical electrical ratings and package type. Although currently discontinued at DiGi Electronics, this part maintains the same core specifications as S3KHM6G and is available in inventory (2,395 units). Selection of this part should be evaluated based on long-term supply chain requirements.
Alternative Equivalents (Multi-Source Options):
S3K-13-F (Diodes Incorporated) and S3K-TP (Micro Commercial Co) are functionally equivalent alternatives in active production. Both maintain 800 V, 3 A ratings with DO-214AB SMC packaging and ROHS3 compliance. These parts enable multi-source procurement strategies and reduce supply chain dependency on a single manufacturer.
Package-Compatible Alternative:
S3KB-13-F (Diodes Incorporated) provides electrical equivalence with a DO-214AA (SMB) package instead of DO-214AB (SMC). This part is suitable for applications where PCB layout accommodates the larger SMB footprint. Active production status and high inventory (26,200 units) support immediate availability.
Higher Current Alternatives:
CGRC506-G (Comchip Technology) and S5KC-13-F (Diodes Incorporated) are rated for 5 A average rectified current while maintaining 800 V reverse voltage and DO-214AB SMC packaging. These parts provide design margin for applications requiring higher current capacity and are in active production.
Fast Recovery Alternative:
RS3K-13-F (Diodes Incorporated) features fast recovery characteristics (500 ns vs. 1.5 µs) with identical voltage and current ratings. This part is suitable for applications requiring reduced switching losses or higher frequency operation. Active production status and high inventory (10,179 units) support immediate deployment.
Frequently Asked Questions (FAQ)
Q: Can S3KH directly replace S3KHM6G without circuit modification?
A: Yes. S3KH is a direct equivalent with identical electrical specifications (800 V, 3 A, 1.15 V forward voltage) and package configuration (DO-214AB SMC). The slightly higher reverse leakage current (10 µA vs. 5 µA) does not require circuit modification for general-purpose rectification applications.
Q: What is the difference between DO-214AB (SMC) and DO-214AA (SMB) packages?
A: DO-214AB (SMC) and DO-214AA (SMB) are both surface mount packages with different physical dimensions. SMC is smaller than SMB. Parts with SMB packaging (such as S3KB-13-F and RS3KB-13-F) require larger PCB footprints but are electrically equivalent. Package selection depends on available PCB layout space.
Q: Are all substitute parts AEC-Q101 qualified?
A: S3KHM6G and S3KH are explicitly qualified to AEC-Q101 automotive standards. Other substitute parts (S3K-13-F, S3KB-13-F, RS3K-13-F, RS3KB-13-F, S3K-TP) do not list explicit AEC-Q101 qualification in the provided specifications. For automotive applications requiring AEC-Q101 certification, S3KH is the recommended choice.
Q: What is the significance of reverse recovery time (trr)?
A: Reverse recovery time determines how quickly the diode transitions from conducting to blocking state. S3KHM6G specifies 1.5 µs recovery time. RS3K-13-F and RS3KB-13-F feature faster recovery (500 ns), reducing switching losses in high-frequency applications. Standard recovery parts (>500 ns) are suitable for line-frequency and low-frequency rectification.
Q: Can I use a 5 A rated diode (CGRC506-G or S5KC-13-F) in place of a 3 A rated diode (S3KHM6G)?
A: Yes. A 5 A rated diode can replace a 3 A rated diode in the same circuit. The higher current rating provides design margin and does not degrade performance. Both CGRC506-G and S5KC-13-F maintain 800 V reverse voltage and DO-214AB SMC packaging, ensuring mechanical and electrical compatibility.
Q: What does ROHS3 compliance mean?
A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All recommended substitute parts maintain ROHS3 compliance, ensuring environmental and regulatory conformance.
Q: Are there inventory considerations when selecting a substitute?
A: Yes. S3KH (3,761 units), S3K-13-F (87,200 units), S3KB-13-F (26,200 units), and S5KC-13-F (15,400 units) are in active production with substantial inventory. S3K V7G (2,395 units) is discontinued but available. Inventory levels support immediate procurement for production requirements.
Q: What is the operating temperature range for substitute parts?
A: S3KHM6G specifies -55°C to 150°C junction temperature. Most substitute parts (S3K-13-F, S3KB-13-F, RS3K-13-F, RS3KB-13-F, S5KC-13-F) extend the lower limit to -65°C, providing wider temperature margin. S3KH and S3K-TP maintain the -55°C to 150°C range. Temperature range selection depends on application requirements.
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