JCS12N65FT N-Channel Enhancement Mode Field Effect Transistor TO-220MF
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JCS12N65FT N-Channel MOSFET - The Optimal Choice for Efficient Power Switch Management
Introducing the JCS12N65FT N-Channel MOSFET, the perfect solution to enhance the efficiency and performance of your device's power switch management. Manufactured using advanced trench technology, this MOSFET is specifically designed for high-efficiency switch mode power supplies, electronic lamp ballasts based on a half-bridge, LED power supplies, and more.
Advanced Trench Technology for High-Efficiency Power Applications
The JCS12N65FT N-Channel MOSFET is engineered to deliver exceptional performance with its low gate charge, low Crss (typ. 23pF), and fast switching speeds. These features are crucial for minimizing power losses and optimizing power transfer efficiency in various applications. The MOSFET is avalanche tested, ensuring reliable operation even under demanding conditions.
JCS12N65FT Features Table:
| Feature | Specification |
|---|---|
| Product Category | Discrete Semiconductor Products |
| Transistors | FETs - Single |
| Transistor Type | N-Channel |
| Drain-Source Current (ID) @ 25℃ | 12A |
| Drain-Source Current (ID) @ 100℃ | 7.6A |
| Breakdown Voltage (BVdss) | 650V |
| Drain-Source On-Resistance (Rds(on)) | 0.78Ω |
| Gate Charge (Qg-typ) | 39nC |
| Improved dv/dt Capability | Yes |
| Compliance | RoHS |
Compatibility
Use the JCS12N65FT as a candidate replacement wherever the original schematic calls for a 650V / ~10-12A class TO-220 N-channel power MOSFET on the primary side of a high-efficiency SMPS. Confirm Rds(on), Qg and package outline against the original markings before fitting.
Common failure symptoms
- PSU dead with no standby voltage on the +12V/+15V auxiliary rail
- Smoke or charring around the small TO-220 device next to the bulk capacitor
- PSU input fuse blown on AC connection — primary MOSFET shorted drain-to-source
- Loud crack at startup followed by lockout, then no second start
- Gate-source short measured between G and S on the suspected MOSFET
Frequently asked questions
Is the JCS12N65FT suitable for the main bridge MOSFETs of a 3000W ASIC PSU?
For main bridge or LLC primary switches in 3000-5000W PSUs, a lower Rds(on) part such as STW48N60DM2, WMJ53N65F2 or SVS47N60PN is generally a closer match. The JCS12N65FT is best suited to lower-current auxiliary and standby supplies.
Can I cross from another 650V TO-220 MOSFET?
Treat as a candidate replacement, not a guaranteed drop-in. Check Rds(on), Qg, Coss, package outline and lead pitch against the original device marking.
Is the package fully insulated?
TO-220MF is the full-mold isolated tab variant — no separate insulator is required when mounting to a grounded heatsink. Always re-verify with the datasheet for the specific batch.
Do you stock it for bulk repair work?
Yes. Contact us for tray quantities or matched same-batch parts for production-line PSU repair.
Related products
- STW48N60DM2 600V N-Channel Power MOSFET
- WMJ53N65F2 650V N-Channel MOSFET
- NCE65TF130D 650V 28A Super Junction Power MOSFET
- GBJ2508 800V 25A Bridge Rectifier for PSU Repair
Contact contact@lys-sz.com for volume pricing or compatibility questions.
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