LM3404B

@@ -0,0 +1,44 @@+# LM3404B++**Leiditech** · MOSFETs · SOT-23++LM3404B from Leiditech, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | G | input | Gate. Control terminal for the N-channel enhancement mode MOSFET. VGS(th) typ 1.5V (1.2V min / 2.5V max at VDS=VGS, ID=250μA). Absolute maximum VGSS = ±20V. Rated for full enhancement at VGS=10V (RDS(on) typ 29mΩ) and logic-level operation at VGS=4.5V (RDS(on) typ 45mΩ). |+| 2 | S | passive | Source. Reference terminal for gate drive and current return for the drain-source channel. Continuous drain-to-source diode forward current IS = 4A max; body diode VSD = 1.2V max at IS=4A, VGS=0V. |+| 3 | D | passive | Drain. Switched high-side terminal of the N-channel MOSFET. VDSS = 30V max (V(BR)DSS typ 32V at VGS=0V, ID=250μA). Continuous drain current ID = 4.2A at TA=25℃ (2.6A at TA=70℃); pulsed IDM = 16A. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Leiditech |+| Package | SOT-23 |+| Category | Transistors/Thyristors |+| Pins | 3 |++## Ordering variants++Same part, different packaging or reel option.++- `LM3404B`++## CAD (KiCad official)++- Symbol: `LM3404B`+- Footprint: `Package_TO_SOT_SMD:SOT-23`+- 3D model: SOT-23 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Leiditech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603039826593656832) (None pp, sha256 `2db1e81a6605a692`, retrieved 2026-08-17, tier: lcsc)+- **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/lm3404b-datasheet.pdf)

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