# 1SV323

**TOSHIBA** · Diodes - Variable Capacitance · SOD-523

1SV323 from TOSHIBA, in a SOD-523. 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 | K | passive | Cathode, marked with the cathode bar on the package; the varactor is reverse-biased (VR max 10 V, IR 3 nA max at 10 V) with this terminal positive relative to the anode. |
| 2 | A | passive | Anode terminal of the varactor diode, opposite the cathode mark; C1V = 26.5 to 29.5 pF at VR = 1 V, f = 1 MHz. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TOSHIBA |
| Package | SOD-523 |
| Category | Diodes |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse voltage | VR | 10 |  |  | V | IR = 1 μA | 1 |
| Reverse current | IR |  |  | 3 | nA | VR = 10 V | 1 |
| Capacitance | C1V | 26.5 |  | 29.5 | pF | VR = 1 V, f = 1 MHz | 1 |
| Capacitance | C4V | 6 |  | 7.1 | pF | VR = 4 V, f = 1 MHz | 1 |
| Capacitance ratio | C1V / C4V | 4 | 4.3 |  |  |  | 1 |
| Series resistance | rs |  | 0.4 | 0.8 | Ω | VR = 4 V, f = 100 MHz | 1 |
| Reverse voltage (absolute maximum rating) | VR |  |  | 10 | V |  | 1 |
| Junction temperature | Tj |  |  | 125 | °C |  | 1 |
| Storage temperature range | Tstg | -55 |  | 125 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `1SV323`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `1sv323-etched.step` / `1sv323-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1sv323.step` / `1sv323.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [TOSHIBA datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589838557675491329) (3 pp, sha256 `81981112900a69ce`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (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/1sv323-datasheet.pdf)