# BAT120C

**Nexperia** · Schottky Barrier Diodes (SBD) · SOT-223-4

BAT120C from Nexperia, in a SOT-223-4. 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 | A1 | passive | Anode of diode 1; each diode is rated for a reverse voltage of 25 V maximum and a forward current of 1 A maximum. |
| 2 | n.c. | unconnected | Not connected. |
| 3 | A2 | passive | Anode of diode 2; each diode is rated for a reverse voltage of 25 V maximum and a forward current of 1 A maximum. |
| 4 | K1, K2 | passive | Common cathode of diode 1 and diode 2; each diode is rated for a reverse voltage of 25 V maximum and a forward current of 1 A maximum. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-223-4 |
| Category | Diodes |
| Pins | 4 |

## 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 |  |  | 25 | V |  | 2 |
| Forward current | IF |  |  | 1 | A |  | 2 |
| Non-repetitive peak forward current | IFSM |  |  | 10 | A | half sine-wave pulse; tp ≤ 10 ms; JEDEC method; Tj(init) = 25 °C | 2 |
| Non-repetitive peak reverse current | IRSM |  |  | 0.5 | A | tp = 100 µs | 2 |
| Junction temperature | Tj |  |  | 125 | °C |  | 2 |
| Ambient temperature | Tamb | -65 |  | 125 | °C |  | 2 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 2 |
| Thermal resistance from junction to ambient | Rth(j-a) |  |  | 100 | K/W | in free air [1] [2] | 2 |
| Forward voltage | VF |  | 260 | 300 | mV | IF = 100 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.02; Tamb = 25 °C | 3 |
| Forward voltage | VF |  | 400 | 450 | mV | IF = 1 A; pulsed; tp ≤ 300 µs; δ ≤ 0.02; Tamb = 25 °C | 3 |
| Reverse current | IR |  | 80 | 500 | µA | VR = 20 V; pulsed; tp ≤ 300 µs; δ ≤ 0.02; Tamb = 25 °C | 3 |
| Reverse current | IR |  |  | 1 | mA | VR = 25 V; pulsed; tp ≤ 300 µs; δ ≤ 0.02; Tamb = 25 °C | 3 |
| Reverse current | IR |  |  | 10 | mA | VR = 20 V; pulsed; tp ≤ 300 µs; δ ≤ 0.02; Tj = 100 °C | 3 |

## CAD (KiCad official)

- Symbol: `BAT120C`
- Footprint: `Package_TO_SOT_SMD:SOT-223`
- 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files: `bat120c-etched.step` / `bat120c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bat120c.step` / `bat120c.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/BAT120C.pdf) (8 pp, sha256 `9b0ebca2807471da`, retrieved 2026-10-30, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/bat120c-datasheet.pdf)