CJ3400

CJ3400 is an N-channel MOSFET from CJ (Jiangsu Changjing) in SOT-23, verified against the Changjing datasheet. Verified figures: drain-source voltage of 30 V, continuous drain current of 5.8 A, gate-threshold voltage of 0.7 V minimum and 1.4 V maximum, on-state resistance of 29 mΩ typical and 35 mΩ maximum at 10 V gate drive, and input capacitance of 1050 pF typical. The selection point is current headroom in the small case: 5.8 A with a 35 mΩ ceiling suits load-switch and synchronous-rectifier positions that outgrow 2 A-class SOT-23 parts, provided the board copper carries the dissipation the headline current implies. Selection advice: the threshold ceiling of 1.4 V makes this a genuine logic-level part, but read the resistance row at your actual gate voltage rather than the 10 V row when the drive is 4.5 V or lower. Parameters verified against the Changjing CJ3400 datasheet.