# CMB18N20A

**Cmos** · MOSFETs · TO-263

CMB18N20A from Cmos, in a TO-263. 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 | G | input | Gate; the pin-configuration picture labels the left lead G, with gate-source voltage limited to ±30 V absolute maximum. |
| 2 | D | passive | Drain; the picture labels the drain on the tab, and the middle lead is drawn between G and S. Drain-source voltage is 200 V maximum and continuous drain current is 18 A at Tc=25℃. |
| 3 | S | passive | Source; the picture labels the right lead S, and the body diode is rated 18 A continuous source current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Cmos |
| Package | TO-263 |
| Category | Triode/MOS Tube/Transistor |
| 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 |
|---|---|---|---|---|---|---|---|
| Drain-Source Breakdown Voltage | BVDSS | 200 |  |  | V | VGS=0V , ID=250uA | 2 |
| Gate Threshold Voltage | VGS(th) | 1 | 1.95 | 3 | V | VGS=VDS , ID =250uA | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 10 | uA | VDS=200V , VGS =0V | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 100 | uA | VDS=160V, VGS=0V | 2 |
| Gate-Source Leakage Current | IGSS | -100 |  | 100 | nA | VGS ±30V , VDS=0V | 2 |
| Continuous Source Current | IS |  |  | 18 | A |  | 2 |
| Pulsed Source Current | ISM |  |  | 54 | A | VG=VD=0V, Force Current | 2 |
| Diode Forward Voltage | VSD |  |  | 1.2 | V | VGS=0V , IS=1 A, TJ=25℃ | 2 |
| Drain-Source Voltage | VDS |  |  | 200 | V |  | 1 |
| Gate-Source Voltage | VGS | -30 |  | 30 | V |  | 1 |
| Continuous Drain Current | ID |  |  | 18 | A | Tc=25℃ | 1 |
| Continuous Drain Current | ID |  |  | 11 | A | Tc=100℃ | 1 |
| Pulsed Drain Current | IDM |  |  | 54 | A | Note 1: Repetitive rating; pulse width limited by maximum junction temperature | 1 |
| Single Pulse Avalanche Energy | EAS |  |  | 180 | mJ | Note 2: VDD=50V, VGS=10V, L=10 mH, IAS=6A | 1 |
| Total Power Dissipation | PD |  |  | 100 | W | Tc=25℃ | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 |  |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 |  |  | 1 |
| Thermal Resistance Junction-case | RθJC |  | 1.2 |  | ℃/W |  | 1 |
| Thermal Resistance Junction-ambient | RθJA |  | 62.5 |  | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `CMB18N20A`
- Footprint: `Package_TO_SOT_SMD:TO-263-2`
- 3D model: TO-263 (KiCad packages3D, STEP)
- 3D model files: `cmb18n20a-etched.step` / `cmb18n20a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cmb18n20a.step` / `cmb18n20a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Cmos datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590457553328111616) (3 pp, sha256 `fc1d2c4176b43768`, retrieved 2026-10-09, 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/cmb18n20a-datasheet.pdf)