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FST6340M Equivalent & Substitute Parts Reference (Diode, Rectifier)
Part Overview
The FST6340M from GeneSiC Semiconductor is a Schottky diode module configured as a 1 Pair Common Cathode rectifier, rated for 40 V reverse voltage and 30 A average forward current, with a fast recovery time and low reverse leakage. It is chassis-mountable in D61-3M packaging. The part is currently categorized as obsolete. Finding alternative diode rectifier models is necessary for maintaining product designs, supporting legacy systems, and ensuring inventory continuity where the FST6340M is specified.
Substiute Parts
Key Parameters
| Parameter | FST6340M |
|---|---|
| Manufacturer | GeneSiC Semiconductor |
| Category | Diodes, Rectifiers |
| Diode Configuration | 1 Pair Common Cathode |
| Technology | Schottky |
| Voltage - DC Reverse (Vr) (Max) | 40 V |
| Current - Average Rectified (Io) (per Diode) | 30A |
| Voltage - Forward (Vf) (Max) @ If | 700 mV @ 30 A |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) |
| Current - Reverse Leakage @ Vr | 1 mA @ 40 V |
| Operating Temperature - Junction | -55°C ~ 150°C |
| Mounting Type | Chassis Mount |
| Package / Case | D61-3M |
| Supplier Device Package | D61-3M |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| ECCN | EAR99 |
| HTSUS | 8541.10.0080 |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for diode rectifiers such as the FST6340M is made only when the following parameters are matched: diode configuration, Schottky technology, voltage rating, average rectified current, maximum forward voltage, reverse leakage, recovery speed, operating temperature, mounting type, and package or form factor. The alternative part 80CNQ040 from SMC Diode Solutions meets the strict requirements for these key parameters.
Parameter Comparison
| Parameter | FST6340M | 80CNQ040 |
|---|---|---|
| Manufacturer | GeneSiC Semiconductor | SMC Diode Solutions |
| Category | Diodes, Rectifiers | Diodes, Rectifiers |
| Diode Configuration | 1 Pair Common Cathode | 1 Pair Common Cathode |
| Technology | Schottky | Schottky |
| Voltage - DC Reverse (Vr) (Max) | 40 V | 40 V |
| Current - Average Rectified (Io) (per Diode) | 30A | 40A |
| Voltage - Forward (Vf) (Max) @ If | 700 mV @ 30 A | 660 mV @ 40 A |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) | Fast Recovery =< 500ns, > 200mA (Io) |
| Current - Reverse Leakage @ Vr | 1 mA @ 40 V | 5 mA @ 40 V |
| Operating Temperature - Junction | -55°C ~ 150°C | -55°C ~ 150°C |
| Mounting Type | Chassis Mount | Chassis Mount |
| Package / Case | D61-3M | PRM2 |
| Supplier Device Package | D61-3M | PRM2 |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| ECCN | EAR99 | EAR99 |
| HTSUS | 8541.10.0080 | 8541.10.0080 |
| Product Status | Obsolete | Active |
Engineering Selection Recommendations
The FST6340M diode, part of the Diodes, Rectifiers category, is obsolete. The listed substitute, 80CNQ040, is active and RoHS3 compliant with the same ECCN and HTS code, and the same MSL level. Selection can be made directly based on product status and compliance information as detailed above.
Frequently Asked Questions (FAQ)
Q: What parameters must strictly match to substitute FST6340M in a design?
A: The substitute must match diode configuration, technology (Schottky), reverse voltage rating, average rectified current, maximum forward voltage, reverse leakage at specified voltage, switching speed, operating temperature range, mounting type, package or case, and moisture sensitivity level.
Q: Is the package identical between FST6340M and 80CNQ040?
A: FST6340M uses the D61-3M package; 80CNQ040 uses PRM2. Engineering verification against chassis mounting and footprint is required.
Q: Can 80CNQ040 be used for direct replacement in applications using FST6340M?
A: Substitution is based on strict matching of the key parameters shown; differences in package or current and leakage specifications must align with system requirements.
Q: Do both parts have the same regulatory and export classifications?
A: Yes, both diodes are classified under ECCN EAR99 and HTSUS 8541.10.0080.
Q: What is the product status difference between FST6340M and 80CNQ040?
A: FST6340M is obsolete. 80CNQ040 is active.
Q: What about RoHS compliance and MSL ratings?
A: 80CNQ040 is RoHS3 compliant and MSL 1 (Unlimited). FST6340M is MSL 1 (Unlimited); no RoHS data was provided.
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