# Taiwan Semiconductor BZT52B15 RHG

Zener diode, 15 V, 2 %, 500 mW, SOD-123 (pad 1 = cathode).

| | |
|---|---|
| Manufacturer | Taiwan Semiconductor |
| MPN | BZT52B15 RHG |
| Category | diode (Zener diode) |
| Package | SOD-123 |
| DigiKey | [BZT52B15RHGTR-ND](https://www.digikey.com/en/products/detail/taiwan-semiconductor-corporation/BZT52B15-RHG/7357308) |
| Mouser | [821-BZT52B15RHG](https://www.mouser.com/ProductDetail/821-BZT52B15RHG) |

Distributor numbers and stock from the LEDster-TI BOM, checked 2026-11-02: DigiKey BZT52B15RHGTR-ND (stock 7428), Mouser 821-BZT52B15RHG (stock 10272), LCSC none (stock n/a).

## Files

- `bzt52b15-rhg.kicad_mod` footprint (KiCad)
- `bzt52b15-rhg.kicad_sym` symbol (KiCad)
- `bzt52b15-rhg.step` 3D model (STEP, Z-up, seated on z = 0, centred on the footprint origin)
- `bzt52b15-rhg.lbr` Fusion / EAGLE library part (adom-lbr from the files above with this page's metadata; no embedded 3D, bind the STEP)

## Provenance

- `bzt52b15-rhg.kicad_mod`: KiCad `Diode_SMD:D_SOD-123` footprint (https://gitlab.com/kicad/libraries/kicad-footprints/-/raw/master/Diode_SMD.pretty/D_SOD-123.kicad_mod), unmodified except the 3D model path (now `bzt52b15-rhg.step`). sha256/16 of the original: fd16785935b01254.
- `bzt52b15-rhg.step`: KiCad `Diode_SMD.3dshapes/D_SOD-123.step` (packages3D), byte-identical copy (sha256/16 b3dc4065573abc72). The footprint's (model (offset 0 0 0) (rotate 0 0 0)), so the STEP is already in the footprint frame and no transform was applied. Checked with OpenCascade (step2glb features): Z-up, seated on the board plane, origin = footprint origin.
- Upstream terms: KiCad official library (gitlab.com/kicad/libraries/kicad-footprints, kicad-packages3D and kicad-symbols, master, fetched 2026-11-02). License: CC-BY-SA 4.0 with the KiCad libraries exception (using these files in a design, and distributing the design or its manufacturing output, does not require the design to be licensed under CC-BY-SA). The STEP is KiCad's generic body for this package, not a manufacturer model.
- `bzt52b15-rhg.kicad_sym`: KiCad `Device:D_Zener` (https://gitlab.com/kicad/libraries/kicad-symbols/-/raw/master/Device.kicad_symdir/D_Zener.kicad_sym), renamed to `BZT52B15_RHG`. Pin 1 (cathode) renamed from `K` to `C` to match the LEDster-TI netlist (pins `A`, `C`); pin 2 stays `A`. Pin numbers 1/2 match footprint pads 1 (cathode) / 2 (anode).

## Notes

- Pin NAMES are C (pin 1, cathode) and A (pin 2, anode); pin NUMBERS stay 1/2 to match the KiCad pads. A netlist that addresses the part as D.A / D.C binds by pin name.

## License

Adom-authored content CC-BY-4.0; third-party files keep their upstream terms (see `LICENSE`).