# BAS21H

**LGE** · Switching Diodes · SOD-323

BAS21H from LGE, in a SOD-323. 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 | CATHODE | passive | Cathode of the switching diode; withstands VR 250 V continuous and VRRM 250 V, with forward continuous current IF 200 mA. |
| 2 | ANODE | passive | Anode of the switching diode; forward voltage max 1000 mV at IF=100 mA and 1250 mV at IF=200 mA, peak forward surge current 625 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| Package | SOD-323 |
| 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 Breakdown Voltage | V(BR)R | 250 |  |  | V | IR=100μA | 1 |
| Forward Voltage | VF |  |  | 1000 | mV | IF=100mA | 1 |
| Forward Voltage | VF |  |  | 1250 | mV | IF=200mA | 1 |
| Reverse Current | IR |  |  | 0.1 | μA | VR=200V | 1 |
| Reverse Current | IR |  |  | 100 | μA | VR=200V,TJ=150℃ | 1 |
| Diode Capacitance | CD |  |  | 5 | pF | VR=0,f=1.0MHz | 1 |
| Reverse Recovery Time | trr |  |  | 50 | ns | IF=IR=30mA,RL=100Ω | 1 |
| Continuous Reverse Voltage | VR |  |  | 250 | V |  | 1 |
| Repetitive Peak Reverse Voltage | VRRM |  |  | 250 | V |  | 1 |
| Forward Continuous Current | IF |  |  | 200 | mA |  | 1 |
| Peak Forward Surge Current | IFSM |  |  | 625 | mA |  | 1 |
| Power Dissipation | Pd |  |  | 200 | mW |  | 1 |
| Thermal Resistance Junction to Ambient | RθJA |  |  | 635 | ℃/W |  | 1 |
| Junction and Storage Temperature Range | Tj,TSTG | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `BAS21H`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `bas21h-etched.step` / `bas21h-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bas21h.step` / `bas21h.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LGE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590454979820752896) (2 pp, sha256 `c57475e6c992f55e`, retrieved 2026-10-23, 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/bas21h-datasheet.pdf)