# BAW101S

**Nexperia** · Diodes - General Purpose · SOT-363

BAW101S from Nexperia, in a SOT-363. 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; the two diodes are electrically insulated from each other, and per-diode limits are VR 300 V and IF 250 mA (single diode loaded). |
| 2 | n.c. | unconnected | Not connected. |
| 3 | K2 | passive | Cathode of diode 2; the two diodes are electrically insulated from each other, and per-diode limits are VR 300 V and IF 250 mA (single diode loaded). |
| 4 | A2 | passive | Anode of diode 2; the two diodes are electrically insulated from each other, and per-diode limits are VR 300 V and IF 250 mA (single diode loaded). |
| 5 | n.c. | unconnected | No connection. |
| 6 | K1 | passive | Cathode of diode 1; the two diodes are electrically insulated from each other, and per-diode limits are VR 300 V and IF 250 mA (single diode loaded). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-363 |
| Category | Diodes |
| Pins | 6 |

## 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 (300 V rating) | VR |  |  | 300 | V |  | 2 |
| repetitive peak reverse voltage (300 V rating) | VRRM |  |  | 300 | V |  | 2 |
| forward current | IF |  |  | 250 | mA | single diode loaded [1] | 2 |
| forward current | IF |  |  | 140 | mA | double diode loaded [1] | 2 |
| repetitive peak forward current | IFRM |  |  | 625 | mA |  | 2 |
| non-repetitive peak forward current | IFSM |  |  | 4.5 | A | tp = 1 µs; square wave; Tj(init) = 25 °C | 2 |
| total power dissipation | Ptot |  |  | 350 | mW | Tamb ≤ 25 °C [1] | 2 |
| junction temperature | Tj |  |  | 150 | °C |  | 2 |
| ambient temperature | Tamb | -65 |  | 150 | °C |  | 2 |
| storage temperature | Tstg | -65 |  | 150 | °C |  | 2 |
| thermal resistance from junction to ambient | Rth(j-a) |  |  | 357 | K/W | in free air [1] | 3 |
| thermal resistance from junction to solder point | Rth(j-sp) |  |  | 255 | K/W | one or more diodes loaded [2] | 3 |
| reverse breakdown voltage | V(BR)R | 300 |  |  | V | IR = 100 µA; Tj = 25 °C | 3 |
| forward voltage | VF |  |  | 1.1 | V | IF = 100 mA; tp = 300 µs; δ = 0.02; pulsed; Tj = 25 °C | 3 |
| reverse current | IR |  |  | 150 | nA | VR = 250 V; Tj = 25 °C | 3 |
| reverse current | IR |  |  | 50 | µA | VR = 250 V; Tamb = 150 °C | 3 |
| diode capacitance | Cd |  |  | 2 | pF | VR = 0 V; f = 1 MHz; Tj = 25 °C | 3 |
| reverse recovery time | trr |  |  | 50 | ns | IF = 30 mA; IR = 30 mA; RL = 100 Ω; Tj = 25 °C; measured at IR = 3 mA | 3 |

## CAD (KiCad official)

- Symbol: `BAW101S`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `baw101s-etched.step` / `baw101s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `baw101s.step` / `baw101s.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/BAW101S.pdf) (9 pp, sha256 `d6d837ed73755d60`, retrieved 2026-10-17, 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/baw101s-datasheet.pdf)