# ESD3B3CM

**MDD Microdiode Semiconductor** · ESD And Surge Protection (TVS/ESD) · SOD-323

ESD3B3CM from MDD Microdiode Semiconductor, 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 | 1 | passive | One terminal of the bidirectional TVS/ESD protection diode, which the datasheet rates for a 3.3 V reverse working voltage and ±30 kV IEC 61000-4-2 air and contact ESD; the datasheet does not name this pin or assign it a separate function. |
| 2 | 2 | passive | The other terminal of the bidirectional TVS/ESD protection diode, which the datasheet rates for a 3.3 V reverse working voltage and ±30 kV IEC 61000-4-2 air and contact ESD; the datasheet does not name this pin or assign it a separate function. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MDD Microdiode Semiconductor |
| Package | SOD-323 |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| ESD per IEC 61000-4-2 (Air) | VESD | -30 |  | 30 | kV | IEC 61000-4-2 (Air) | 1 |
| ESD per IEC 61000-4-2 (Contact) | VESD | -30 |  | 30 | kV | IEC 61000-4-2 (Contact) | 1 |
| Peak Pulse Power | PPP |  |  | 500 | W | 8/20us | 1 |
| Operating Temperature | TOPT | -55 |  | 150 | °C |  | 1 |
| Storage Temperature | TSTG | -55 |  | 150 | °C |  | 1 |
| Reverse Breakdown Voltage | VBR | 4 |  | 6 | V | IT = 1mA | 2 |
| Reverse Leakage Current | IR |  |  | 1 | μA | VRWM = 3.3V | 2 |
| Clamping Voltage | VC |  |  | 6.5 | V | IPP = 1A, tp = 8/20μs | 2 |
| Clamping Voltage | VC |  | 13 | 18 | V | IPP = 28A, tp = 8/20μs | 2 |
| Junction Capacitance | CJ |  | 30 | 45 | pF | VR = 0V, f = 1MHz | 2 |
| Reverse Working Voltage | VRWM |  |  | 3.3 | V |  | 2 |

## CAD (KiCad official)

- Symbol: `ESD3B3CM`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `esd3b3cm-etched.step` / `esd3b3cm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd3b3cm.step` / `esd3b3cm.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/8588941109104160768) (4 pp, sha256 `30e624c707be2e14`, retrieved 2026-11-03, tier: lcsc)
- **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/esd3b3cm-datasheet.pdf)