# CEM3139

**CET(Chino-Excel Tech)** · MOSFETs · SOP-8

CEM3139 from CET(Chino-Excel Tech), in a SOP-8. 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 | S1 | passive | Source terminal of channel 1 of the dual MOSFET; the absolute maximum ratings for this device are 20V drain-source (N-channel) and -30V (P-channel). |
| 2 | G1 | input | Gate of channel 1; gate-source voltage is rated ±12V per the absolute maximum ratings. |
| 3 | S2 | passive | Source terminal of channel 2 of the dual MOSFET; the absolute maximum ratings for this device are 20V drain-source (N-channel) and -30V (P-channel). |
| 4 | G2 | input | Gate of channel 2; gate-source voltage is rated ±12V per the absolute maximum ratings. |
| 5 | D2 | passive | Drain terminal of channel 2, tied internally to pin 6; drain current is rated 9A (N-channel) and -6A (P-channel) per the absolute maximum ratings. |
| 6 | D2 | passive | Drain terminal of channel 2, tied internally to pin 5; drain current is rated 9A (N-channel) and -6A (P-channel) per the absolute maximum ratings. |
| 7 | D1 | passive | Drain terminal of channel 1, tied internally to pin 8; drain current is rated 9A (N-channel) and -6A (P-channel) per the absolute maximum ratings. |
| 8 | D1 | passive | Drain terminal of channel 1, tied internally to pin 7; drain current is rated 9A (N-channel) and -6A (P-channel) per the absolute maximum ratings. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | CET(Chino-Excel Tech) |
| Package | SOP-8 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 8 |

## 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 Voltage | VDS |  |  | 20 | V | N-Channel | 1 |
| Drain-Source Voltage | VDS |  |  | -30 | V | P-Channel | 1 |
| Gate-Source Voltage | VGS | -12 |  | 12 | V |  | 1 |
| Drain Current-Continuous | ID |  |  | 9 | A | N-Channel | 1 |
| Drain Current-Continuous | ID |  |  | -6 | A | P-Channel | 1 |
| Drain Current-Pulsed | IDM |  |  | 36 | A | N-Channel | 1 |
| Drain Current-Pulsed | IDM |  |  | -24 | A | P-Channel | 1 |
| Maximum Power Dissipation | PD |  |  | 2 | W |  | 1 |
| Operating and Store Temperature Range | TJ,Tstg | -55 |  | 150 | C |  | 1 |
| Thermal Resistance, Junction-to-Ambient | RθJA |  |  | 62.5 | C/W |  | 1 |
| Drain-Source Breakdown Voltage | BVDSS | 20 |  |  | V | VGS = 0V, ID = 250µA | 2 |
| Gate Threshold Voltage | VGS(th) | 0.4 |  | 1 | V | VGS = VDS, ID = 250µA | 2 |
| Static Drain-Source On-Resistance | RDS(on) |  | 12 | 16 | mΩ | VGS = 4.5V, ID = 6.4A | 2 |
| Static Drain-Source On-Resistance | RDS(on) |  | 15 | 20 | mΩ | VGS = 2.5V, ID = 4.5A | 2 |
| Gate Body Leakage Current, Forward | IGSSF |  |  | 100 | nA | VGS = 12V, VDS = 0V | 2 |
| Gate Body Leakage Current, Reverse | IGSSR | -100 |  |  | nA | VGS = -12V, VDS = 0V | 2 |
| Drain-Source Breakdown Voltage | BVDSS | -30 |  |  | V | VGS = 0V, ID = -250µA | 3 |
| Gate Threshold Voltage | VGS(th) | -1 |  | -3 | V | VGS = VDS, ID = -250µA | 3 |
| Static Drain-Source On-Resistance | RDS(on) |  |  | 34 | mΩ | VGS = -10V, ID = -6A | 3 |
| Static Drain-Source On-Resistance | RDS(on) |  |  | 52 | mΩ | VGS = -4.5V, ID = -5A | 3 |
| Gate Body Leakage Current, Forward | IGSSF |  |  | 100 | nA | VGS = 12V, VDS = 0V | 3 |
| Gate Body Leakage Current, Reverse | IGSSR | -100 |  |  | nA | VGS = -12V, VDS = 0V | 3 |

## CAD (KiCad official)

- Symbol: `CEM3139`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cem3139-etched.step` / `cem3139-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cem3139.step` / `cem3139.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [CET(Chino-Excel Tech) datasheet](docs/cem3139-datasheet.pdf) (7 pp, sha256 `4ba8177654a2147f`, retrieved 2026-10-30, 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/cem3139-datasheet.pdf)