# 23BA05UL

**UMW** · ESD And Surge Protection (TVS/ESD) · SOT-23

23BA05UL from UMW, in a SOT-23. 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 | 1 | passive | Anode of the first uni-directional TVS diode in the pinning schematic, shown as the lower terminal of the diode with pin 3 as the common cathode. |
| 2 | 2 | passive | Anode of the second uni-directional TVS diode in the pinning schematic, shown as the lower terminal of the diode with pin 3 as the common cathode. |
| 3 | 3 | passive | Common cathode of the two TVS diodes in the pinning schematic, rated for 5V reverse working voltage (VRWM max 6V) with 8/20µs peak pulse current of 5A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |

## 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 Working Voltage | VRWM |  |  | 5 | V |  | 2 |
| Breakdown Voltage | VBR | 6 |  |  | V | IT=1mA | 2 |
| Reverse Leakage Current | IR |  |  | 0.5 | µA | VRWM=5V | 2 |
| Clamping Voltage | VC |  |  | 9 | V | IPP=1A(8/20µs) | 2 |
| Clamping Voltage | VC |  |  | 16 | V | IPP=5A(8/20µs) | 2 |
| Junction Capacitance | CJ |  | 0.8 |  | pF | VR=0V, f=1MHz | 2 |
| Peak Pulse Power (8/20µs) | PPP |  |  | 80 | W | 8/20µs | 2 |
| Peak Pulse Current (8/20µs) | IPP |  |  | 5 | A | 8/20µs | 2 |
| ESD per IEC 61000-4-2 (Air) | VESD | -25 |  | 25 | kV | IEC 61000-4-2 air discharge | 2 |
| ESD per IEC 61000-4-2 (Contact) | VESD | -20 |  | 20 | kV | IEC 61000-4-2 contact discharge | 2 |
| Ambient Temperature Range | TA | -55 |  | 125 | °C |  | 2 |
| Storage Temperature Range | TSTG | -55 |  | 150 | °C |  | 2 |

## CAD (KiCad official)

- Symbol: `23BA05UL`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `23ba05ul-etched.step` / `23ba05ul-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `23ba05ul.step` / `23ba05ul.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755874076383043584) (7 pp, sha256 `05ecad5e000a398d`, retrieved 2026-10-17, 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/23ba05ul-datasheet.pdf)