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TF2123G-E5-AQ3-R
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UTC Unisonic Tech JFETs, SOT-723. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+39@@ -0,0 +1,39 @@+# TF2123G-E5-AQ3-R++**UTC Unisonic Tech** · JFETs · SOT-723++TF2123G-E5-AQ3-R from UTC Unisonic Tech, in a SOT-723. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | S | passive | Source terminal; typically connected to ground or bias return; provides return path for drain current. |+| 2 | D | output | Drain terminal connected to load resistor and power supply; maximum drain current 10 mA; output signal is extracted from this node. |+| 3 | G | input | Gate input terminal for signal control; gate-source cutoff voltage VGS(OFF) is -0.38 V maximum; gate-drain voltage must not exceed -20 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UTC Unisonic Tech |+| Package | SOT-723 |+| Category | Transistors/Thyristors |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `TF2123G-E5-AQ3-R`+- Footprint: `Package_TO_SOT_SMD:SOT-723`+- 3D model: SOT-723, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.5 mm nominal SOT-723 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)+- 3D model files: `tf2123g-e5-aq3-r-etched.step` / `tf2123g-e5-aq3-r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tf2123g-e5-aq3-r.step` / `tf2123g-e5-aq3-r.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [UTC Unisonic Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586203135669121024) (4 pp, sha256 `eae046d5ee04c7f4`, retrieved 2026-10-01, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/tf2123g-e5-aq3-r-datasheet.pdf)
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