# BC3134KT

**CBI** · MOSFETs · SOT-523

BC3134KT from CBI, in a SOT-523. 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 | GATE | input | Gate control input; gate-source voltage is rated ±12V with threshold of 0.35V min to 1.1V max at ID=250µA. |
| 2 | SOURCE | passive | Source terminal of the N-channel MOSFET; continuous drain current is rated 0.75A (1.5A pulsed). |
| 3 | DRAIN | passive | Drain terminal of the N-channel MOSFET; drain-source voltage is rated 20V with RDS(on) of 380 mΩ max at VGS=4.5V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | CBI |
| Package | SOT-523 |
| Category | Transistors/Thyristors |
| 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 voltage | VDSS |  |  | 20 | V |  | 1 |
| Gate-Source voltage | VGS | -12 |  | 12 | V |  | 1 |
| Drain Current-Continuous | ID |  |  | 0.75 | A |  | 1 |
| Drain Current-Pulsed | IDM |  |  | 1.5 | A | note 1: repetitive rating, pulse width limited by maximum junction temperature | 1 |
| Power Dissipation | PD |  |  | 200 | mW | note 2: no heat sink at Ta=25℃ | 1 |
| Storage Temperature (as printed) | Tj |  |  | 150 | ℃ |  | 1 |
| Junction Temperature (as printed) | Tstg | -55 |  | 150 | ℃ | -55 ~+150 as printed | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 625 | ℃/W |  | 1 |
| Drain-Source Breakdown Voltage | V(BR)DSS | 20 |  |  | V | VGS = 0V, ID =250µA | 2 |
| Gate-Threshold Voltage | VGS(th) | 0.35 |  | 1.1 | V | VDS =VGS, ID =250µA | 2 |
| Gate-Body Leakage Current | IGSS | -20 |  | 20 | µA | VDS =0V, VGS =±10V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | µA | VDS =20V, VGS =0V | 2 |
| Drain-Source On-State Resistance | RDS(on) |  |  | 380 | mΩ | VGS =4.5V, ID =650mA | 2 |
| Drain-Source On-State Resistance | RDS(on) |  |  | 450 | mΩ | VGS =2.5V, ID =550mA | 2 |
| Drain-Source On-State Resistance | RDS(on) |  |  | 800 | mΩ | VGS =1.8V, ID =450mA | 2 |
| Drain-Source Diode Forward Voltage | VSD |  |  | 1.2 | V | IS=0.15A, VGS = 0V | 2 |
| Forward Transconductance | gFS |  | 1 |  | S | VDS =10V, ID =800mA | 2 |
| Turn-On Delay Time | td(on) |  | 6.7 |  | ns | VDD=10V,ID=500mA, VGS=4.5V,RG=10Ω | 2 |
| Rise Time | tr |  | 4.8 |  | ns | VDD=10V,ID=500mA, VGS=4.5V,RG=10Ω | 2 |
| Turn-Off Delay Time | td(off) |  | 17.3 |  | ns | VDD=10V,ID=500mA, VGS=4.5V,RG=10Ω | 2 |
| Fall Time | tf |  | 7.4 |  | ns | VDD=10V,ID=500mA, VGS=4.5V,RG=10Ω | 2 |

## CAD (KiCad official)

- Symbol: `BC3134KT`
- Footprint: `Package_TO_SOT_SMD:SOT-523`
- 3D model: SOT-523, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.8 mm nominal SOT-523 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `bc3134kt-etched.step` / `bc3134kt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc3134kt.step` / `bc3134kt.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [CBI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603120025003966464) (4 pp, sha256 `c84267043bc4096d`, retrieved 2026-10-18, 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/bc3134kt-datasheet.pdf)