# BB910

**Shikues** · Varactor (variable-capacitance diode) · SOD-323

Shikues BB910 silicon variable-capacitance diode in SOD-323 for FM radio tuning and AFC: 35 to 45 pF at 0.5 V falling to 10 to 20 pF at 5 V (capacitance ratio 3.25 typical).

## Verification

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::adom-verified{src="/adom/bb910/render/verification.json"}

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode (the banded end). See the note below. |
| 2 | A | passive | Anode. |

**Note:** The Shikues sheet shows the outline but does not label the terminals. Pin 1 = cathode under the band is the standard BB910 pinning and what the KiCad footprint assumes; confirm the band on the first parts received.

## Key specifications

| Parameter | Value | Source |
|---|---|---|
| Reverse voltage (max) | 6 V | Datasheet p.1 |
| Capacitance C1 | 35 to 45 pF at VR = 0.5 V | Datasheet p.1 |
| Capacitance C2 | 10 to 20 pF at VR = 5 V | Datasheet p.1 |
| Capacitance ratio C1/C2 | 1.2 min, 3.25 typ | Datasheet p.1 |
| Series resistance | 0.8 ohm max at 470 MHz | Datasheet p.1 |
| Reverse current | 10 nA max at 6 V | Datasheet p.1 |
| Package | SOD-323 | Datasheet p.3 |

## Ordering

| Distributor | Part number | Note |
|---|---|---|
| LCSC / JLCPCB | [C475628](https://www.lcsc.com/product-detail/C475628.html) | JLC Extended part, 356 in stock on 2026-10-08 |
| Mouser | not listed | no listing for this manufacturer's part (searched 2026-10-08) |
| DigiKey | not listed | no listing for this manufacturer's part (searched 2026-10-08) |

## CAD

| File | What it is |
|---|---|
| `bb910.kicad_sym` | KiCad symbol, with MPN, manufacturer and distributor numbers as properties |
| `bb910.kicad_mod` | KiCad footprint: `Diode_SMD:D_SOD-323`, KiCad official, CC-BY-SA 4.0 |
| `bb910.step` / `bb910.glb` | 3D model, Z-up, seated on z = 0: KiCad packages3D (tag 10.0.6), D_SOD-323.step |
| `bb910-etched.step` / `bb910-etched.glb` | The same model with the part number laser-etched on top as a separate, toggleable `Adom.LaserEtch` group (a virtual identification aid, not the maker's real marking) |
| `bb910.lbr` | Fusion 360 / EAGLE library: one deviceset, each with its own MPN, manufacturer and LCSC / Mouser / DigiKey attributes |
| `altium/Adom_bb910.SchLib` / `.PcbLib` | Altium library pair (adom-lbr, no Altium needed): symbol and footprint with the 3D body, parameters carry the part numbers; `altium/*.adom-lbr.json` is the canonical hub each was built from |

## Provenance

- **Datasheet:** [docs/bb910-datasheet.pdf](docs/bb910-datasheet.pdf), sha256 `ae9de5e6b22ff691`, retrieved 2026-10-08 from LCSC
- **Specs:** each row names its source: the manufacturer datasheet (with page) or the LCSC parametric listing (retrieved 2026-10-08).
- **Distributor numbers:** looked up 2026-10-08 with adom-parts-search (Mouser, DigiKey, JLCPCB), exact part number and manufacturer only.
- **CAD:** footprint `Diode_SMD:D_SOD-323`; 3D: KiCad packages3D (tag 10.0.6), D_SOD-323.step.

## Related

- Used on the [AM/FM Receiver Molecule](https://wiki.adom.inc/adom/amfm-receiver-molecule).