AO3400A

@@ -0,0 +1,47 @@+# AO3400A++**Alpha & Omega Semiconductor** · N-channel logic-level MOSFET · SOT-23++A 30 V N-channel logic-level MOSFET in SOT-23, one of the most-used surface-mount switching FETs in modern designs. Its very low on-resistance (about 28 milliohm at VGS=10 V, and still low at 4.5 V) and 5.7 A rating let it switch power loads, act as a low-side gate for LEDs, motors, and relays, or serve as a load switch, all while turning fully on from 3.3 V or 5 V logic. In the tiny SOT-23 it replaces bulkier through-hole MOSFETs on space-constrained boards. Pinout is G, S, D. It is a near drop-in for the 2N7002 at much higher current.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | G | input | Gate. Controls conduction between drain and source. Gate threshold voltage VGS(th) typ 1.05V (0.65V-1.45V). Absolute maximum VGS = ±12V. Input capacitance Ciss ≈ 630 pF. |+| 2 | S | passive | Source. Current return terminal for the N-channel MOSFET. Body diode anode (body-diode forward voltage typ 0.7V, max 1V at IS=1A). |+| 3 | D | passive | Drain. High-side terminal of the N-channel MOSFET. Absolute maximum VDS = 30V. Continuous drain current ID = 5.7A at TA=25°C, pulsed IDM = 30A. Body diode cathode. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | N-channel MOSFET (logic-level) |+| Drain-source (VDS) | 30 V |+| RDS(on) | ~28 mΩ at VGS=10 V (~50 mΩ at 4.5 V) |+| Continuous drain current | 5.7 A |+| Gate threshold | 1-1.7 V (logic-level) |+| Power dissipation | 1.4 W |+| Pinout | G-S-D |+| Package | SOT-23 |++## Ordering variants++- `AO3400A (SOT-23)`+- `AO3400 (SOT-23, prior rev)`++## CAD (KiCad official)++- Symbol: `Transistor_FET:AO3400A`+- Footprint: `Package_TO_SOT_SMD:SOT-23`+- 3D model: SOT-23 (KiCad packages3D)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Alpha & Omega Semiconductor datasheet](https://www.aosmd.com/sites/default/files/res/datasheets/AO3400A.pdf) (5 pp, sha256 `9c60d0b6c1ddc760`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ao3400-datasheet.pdf)

@@ -0,0 +1,36 @@+{+  "slug": "ao3400",+  "version": "0.1.0",+  "type": "component",+  "description": "AOS 30 V N-channel logic-level MOSFET, SOT-23. ~28 mohm RDS(on), 5.7 A. The default SMD load switch. Datasheet-verified.",+  "tags": [+    "component",+    "transistor",+    "mosfet",+    "n-channel",+    "logic-level",+    "sot-23",+    "alpha-omega"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "ao3400.kicad_sym",+    "ao3400.kicad_mod",+    "ao3400.glb",+    "docs/hero.png",+    "docs/ao3400-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file