# ESD0502TL

**MDD Microdiode Semiconductor** · ESD And Surge Protection (TVS/ESD) · SOT-23

ESD0502TL from MDD Microdiode Semiconductor, 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 | I/O1 | passive | ESD-protected high-speed data line 1 (I/O), with 0.2pF typical I/O-to-I/O capacitance and 5.0V max reverse working voltage to GND. |
| 2 | I/O2 | passive | ESD-protected high-speed data line 2 (I/O), with 0.2pF typical I/O-to-I/O capacitance and 5.0V max reverse working voltage to GND. |
| 3 | GND | power_in | Ground reference of the TVS/ESD protection circuit; I/O-to-GND reverse working voltage is 5.0V max and breakdown is 6.0V min at 1mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MDD Microdiode Semiconductor |
| 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 |
|---|---|---|---|---|---|---|---|
| ESD per IEC 61000-4-2 (Air) VESD | VESD | -20 |  | 20 | kV | ESD per IEC 61000-4-2 (Air) | 1 |
| ESD per IEC 61000-4-2 (Contact) VESD | VESD | -20 |  | 20 | kV | ESD per IEC 61000-4-2 (Contact) | 1 |
| Peak Pulse Power | PPP |  |  | 60 | W | 8/20us | 1 |
| Operating Temperature | TOPT | -55 |  | 125 | °C |  | 1 |
| Storage Temperature | TSTG | -55 |  | 150 | °C |  | 1 |
| Lead Solder Temperature (maximum, 10 second duration) | TL |  |  | 260 | °C | 10 sec. | 1 |
| Reverse Leakage Current | IR |  |  | 100 | nA |  | 2 |
| Clamping Voltage | VC |  |  | 10 | V | IPP 1A, tp 8/20us, between I/O and GND | 2 |
| Forward Voltage | VF |  |  | 1.2 | V | IT 10mA, between I/O and GND | 2 |
| Reverse Breakdown Voltage | VBR | 5 | 6 | 15 | V | IT 1mA, between I/O and GND | 2 |
| Total Capacitance (I/O to I/O) | CT |  | 0.2 |  | pF | VR 0V, f 1MHz, between I/O and I/O | 2 |
| Total Capacitance (I/O to GND) | CT |  | 0.4 |  | pF | VR 0V, f 1MHz, between I/O and GND | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin |  Terminal: Matte tin plated. Ultra Low Capacitance TVS/ESD Protection Diodes | 1 |

## CAD (KiCad official)

- Symbol: `ESD0502TL`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `esd0502tl-etched.step` / `esd0502tl-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd0502tl.step` / `esd0502tl.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MDD Microdiode Semiconductor datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590164579688226816) (5 pp, sha256 `3f94cc378f2215aa`, 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/esd0502tl-datasheet.pdf)