NCE65N1K9K
650 V / 2.5 A NCE Power Super Junction MOSFET, TO-252 for auxiliary supplies, LED drivers and small adapters.
The NCE65N1K9K is a 650 V / 2.5 A NCE Power N-channel Super Junction MOSFET in the surface-mount TO-252 package, with a typical on-resistance of 1650 milliohm at a 10 V gate drive. It brings the charge-balance advantage of the Super Junction structure to a small, low-current package, so a high-voltage auxiliary rail or a low-power offline converter can switch with much less loss than a conventional planar device. The 650 V class gives the margin a rectified 220 to 240 V line needs, and the small TO-252 footprint suits a compact, densely packed board where the thermal path runs through the PCB copper. The device is a fit for auxiliary power supplies, standby rails, LED lighting drivers and small adapters, where board space and efficiency both matter. A Super Junction MOSFET turns on with a simple voltage drive, and the intrinsic body diode allows the switch to freewheel cleanly in a bridge. Every device is factory-traceable and ships with import declaration, certificate of origin and RoHS documentation. Designers should confirm the gate drive, the switching loop and the hot on-resistance for the thermal design. BeiLuo holds this class in stock and our FAE team supports gate drive, layout and thermal validation.
FAE Professional Review
The NCE65N1K9K is the small, low-current 650 V Super Junction part in a surface-mount TO-252. It suits auxiliary and standby rails and small adapters where board space is tight. The on-resistance is high because of the low current, so the thermal design is straightforward, but confirm the copper area under the drain pad.
| Parameter | Value |
|---|---|
| VDSS (V) | 650 V |
| ID (A) | 2.5 A |
| RDS(on)@10V typ (mOhm) | 1650 |
| Package | TO-252 |
| Series | SJ-IV |
Application Circuits
Auxiliary and standby supplies
Reference circuits and application schematics for Auxiliary and standby supplies are available from our FAE team.
LED lighting drivers
Reference circuits and application schematics for LED lighting drivers are available from our FAE team.
Small adapters
Reference circuits and application schematics for Small adapters are available from our FAE team.
Need a reference schematic or design review? Our FAE engineers can share verified circuits and layout guidance for this part.
Related Documents
Alternative Part Numbers
| Model | Package | Note | Action |
|---|---|---|---|
| NCE60NF080F | TO-220F | Higher-current 600 V Super Junction option | View |
Complementary Part Numbers
| Model | Package | Note | Action |
|---|---|---|---|
| NCE60NF080F | TO-220F | 600 V Super Junction MOSFET for the main power stage | View |
| NCEP055N30GU | DFN5x6 | Low-voltage SGT MOSFET for the secondary side | View |
Recommended Complementary Products
Frequently Asked Questions
What projects suit the NCE65N1K9K?
It fits high-voltage, low-current rails such as auxiliary and standby supplies, LED lighting drivers and small adapters that run from a rectified 220 V line. The small TO-252 package suits a densely packed board.
For the main power stage, the NCE60NF080F carries more current.
How do I handle the thermal path in TO-252?
A surface-mount TO-252 conducts heat through the PCB, so the copper area under the drain pad and the board's thermal plane matter. Provide generous copper and confirm the case temperature under load.
Our FAE team can review your layout.
Is the device genuine and in stock?
BeiLuo supplies factory-traceable NCE65N1K9K devices through NCE Power's authorized channel, with import declaration, certificate of origin and RoHS files on every order. Stock is normally available.
Request a sample for bench validation.