CS50N065A8 CR Micro 65V 50A N-Channel MOSFET TO-220
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- 65 V / 50 A continuous drain current, TO-220 package
- Rds(on) 12.8 mΩ typ, 17 mΩ max at VGS = 10 V
- Qg 33.9 nC and Ciss 1668.6 pF
- N-channel, Trench process
The CR Micro CS50N065A8 is a 65 V 50 A N-channel MOSFET in a TO-220 package, built on the Trench process. On-resistance is 12.8 mΩ typical and 17 mΩ maximum at a 10 V gate drive; 17.3 mΩ typical at 4.5 V, so it also works from a logic-level driver; gate charge is 33.9 nC with 1668.6 pF input capacitance; threshold voltage spans 1 to 2.5 V.
Key Specifications
| Drain-Source Voltage (VDS) | 65 V |
| Continuous Drain Current (ID) | 50 A |
| Rds(on) @ VGS = 10 V, typ. | 12.8 mΩ |
| Rds(on) @ VGS = 10 V, max. | 17 mΩ |
| Rds(on) @ VGS = 4.5 V, typ. | 17.3 mΩ |
| Rds(on) @ VGS = 4.5 V, max. | 22 mΩ |
| Gate Threshold Voltage (VGS(th)) | 1 – 2.5 V |
| Total Gate Charge (Qg) | 33.9 nC |
| Input Capacitance (Ciss) | 1668.6 pF |
| Channel Polarity | N-channel |
| Process Family | Trench |
| Package | TO-220 |
Process Technology
Trench — the gate is etched vertically into the drift region, multiplying channel width per unit area. Lowest Rds(on) in the sub-200 V range; the trade-off is higher Qg and a more fragile body diode under hard commutation.
Applications
Synchronous rectification in 12–48 V rails, point-of-load converters, and hot-swap circuits.
Selection Notes
- Rds(on) rises with junction temperature. Size the heatsink against the hot value given in the datasheet, not the 25 °C number in the table above.
- If the gate is driven below 10 V, check the 4.5 V Rds(on) line — parts without that rating are not characterised for logic-level drive.
- For high-frequency stages compare Qg and Ciss against the Rds(on) gain. A part one bin lower in Rds(on) often costs more switching loss than it saves in conduction.
- The body diode recovery of low-Rds(on) parts can be severe in bridge topologies. Verify dv/dt and dead time against the datasheet before dropping it into a half bridge.
Common Questions
Is the CS50N065A8 an N-channel or P-channel device?
It is N-channel. The drain-source rating is 65 V.
Can the CS50N065A8 be driven from a 4.5 V logic-level gate signal?
Yes. The datasheet characterises Rds(on) at 4.5 V: 17.3 mΩ typical and 22 mΩ maximum.
What is the gate threshold voltage of the CS50N065A8?
VGS(th) is specified between 1 and 2.5 V. Below the lower figure the part is off; above the upper figure it is fully on at the rated current.
How much gate charge does the CS50N065A8 need?
Qg is 33.9 nC. Size the driver against that figure at your switching frequency, and add the gate loop loss to the total dissipation budget.
What package does the CS50N065A8 come in?
TO-220. Check the datasheet mechanical drawing for lead spacing and thermal pad dimensions before laying out the footprint.
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