# DTA143TUAT106

**ROHM Semicon** · Digital Transistors · SOT-323

DTA143TUAT106 from ROHM Semicon, in a SOT-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 | EMITTER | passive | Emitter of the built-in PNP transistor; VEBO limit is -5 V. |
| 2 | BASE | input | Base input through built-in R1 = 4.7 kΩ (3.29 to 6.11 kΩ), so no external input resistor is needed. |
| 3 | COLLECTOR | passive | Collector of the built-in PNP transistor; VCEO is -50 V and IC is -100 mA max. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ROHM Semicon |
| Package | SOT-323 |
| 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 |
|---|---|---|---|---|---|---|---|
| Collector-emitter breakdown voltage | BVCEO | -50 |  |  | V | IC = -1mA | 2 |
| Collector-base breakdown voltage | BVCBO | -50 |  |  | V | IC = -50μA | 2 |
| Emitter-base breakdown voltage | BVEBO | -5 |  |  | V | IE = -50μA | 2 |
| Collector cut-off current | ICBO |  |  | -500 | nA | VCB = -50V | 2 |
| Emitter cut-off current | IEBO |  |  | -500 | nA | VEB = -4V | 2 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -300 | mV | IC = -5mA, IB = -0.25mA | 2 |
| DC current gain | hFE | 100 | 250 | 600 | - | VCE = -5V, IC = -1mA | 2 |
| Input resistance | R1 | 3.29 | 4.7 | 6.11 | kΩ |  | 2 |
| Collector-base voltage | VCBO |  |  | -50 | V |  | 2 |
| Collector-emitter voltage | VCEO |  |  | -50 | V |  | 2 |
| Emitter-base voltage | VEBO |  |  | -5 | V |  | 2 |
| Collector current | IC |  |  | -100 | mA |  | 2 |
| Power dissipation (DTA143TUA, SOT-323) | PD |  |  | 200 | mW | Each terminal mounted on a reference land | 2 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 2 |
| Range of storage temperature | Tstg | -55 |  | 150 | ℃ |  | 2 |

## CAD (KiCad official)

- Symbol: `DTA143TUAT106`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `dta143tuat106-etched.step` / `dta143tuat106-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dta143tuat106.step` / `dta143tuat106.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ROHM Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881297989111808) (12 pp, sha256 `3ed2cbcdfe7c2672`, retrieved 2026-10-20, 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/dta143tuat106-datasheet.pdf)