ORIGINAL COMPONENT

AO3402

Alpha & Omega Semiconductor · 30 V n-channel MOSFET · SOT-23

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Original component and up to three alternatives
Specification	OriginalAO3402Alpha & Omega Semiconductor	Alternative 1AO3400AAlpha & Omega Semiconductor	Alternative 2No verified match	Alternative 3No verified match
Supplier links	Search Mouser View on DigiKey Search LCSC	Search Mouser Search DigiKey Search LCSC	—	—
Review	Original part	Needs engineering review	—	—
Package	SOT-23	SOT-23	—	—
Channel	N-channel	N-channel	—	—
Drain-source voltage	30 V	30 V	—	—
Gate-source absolute limit	±12 V	±12 V	—	—
Drain current	4 A at VGS = 10 V; see pulse/thermal notes	5.7 A at VGS = 10 V; see pulse/thermal notes	—	—
On-resistance (max)	52 mΩ at VGS = 10 V	26.5 mΩ at VGS = 10 V	—	—
Pinout	1 gate · 2 source · 3 drain	1 gate · 2 source · 3 drain	—	—
Low-drive on-resistance	85 mΩ at VGS = 2.5 V	48 mΩ at VGS = 2.5 V	—	—
Details	Datasheets AO3402 datasheetManufacturer datasheet as linked · 1–2; notes and package pinout	Differences & datasheets AO3402 has higher on-resistance and a lower headline current rating. Recalculate conduction loss and junction temperature. Do not infer logic-level suitability from threshold voltage. Use a guaranteed on-resistance at the actual gate drive. Respect the candidate's lower limits where applicable and verify SOA, body diode, switching loss, and PCB thermal design. Gate charge, avalanche rating, switching timing, complete temperature curves, and assembly tolerances are not fully matched. AO3400A datasheetManufacturer datasheet as linked · 1–2; notes and package pinout	—	—

Original datasheet

AO3402 datasheetManufacturer datasheet as linked · 1–2; notes and package pinout

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