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BT139D-800E
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UMW Thyristors (SCR)/Modules, TO-252. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+44@@ -0,0 +1,44 @@+# BT139D-800E++**UMW** · Thyristors (SCR)/Modules · TO-252++BT139D-800E from UMW, in a TO-252. 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 | A1 | passive | Main terminal 1 (MT1 / Anode 1) of the triac. Carries the on-state RMS current up to 16 A (Tc=80/90 °C). Reference terminal for the gate trigger voltage VGT. |+| 2 | A2 | passive | Main terminal 2 (MT2 / Anode 2) of the triac, electrically connected to the drain-side tab. Off-state repetitive peak voltage VDRM = 800 V. Handles the bidirectional load current with A1. |+| 3 | G | input | Gate trigger input. Peak gate current IGM = 4 A (tp=20 us), average gate power PG(AV) = 1 W. Trigger threshold: IGT <= 50 mA (Q I/II/III) at VD=12 V, RL=100 ohm; VGT <= 1.5 V. Referenced to A1. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | TO-252 |+| Category | Transistors/Thyristors |+| Pins | 3 |++## Ordering variants++Same part, different packaging or reel option.++- `BT139D-800E`++## CAD (KiCad official)++- Symbol: `BT139D-800E`+- Footprint: `Package_TO_SOT_SMD:TO-252-2`+- 3D model: TO-252 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590922076033130496) (8 pp, sha256 `b92174bf9f2a0de3`, 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/bt139d-800e-datasheet.pdf)
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