# DTC123EETL

**ROHM Semicon** · Digital Transistors · SOT-416

DTC123EETL from ROHM Semicon, in a SOT-416. 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 | GND (EMITTER) | power_in | Ground/emitter terminal of the built-in NPN transistor, connected to the R2 end of the internal bias network. |
| 2 | IN (BASE) | input | Input/base terminal connected through built-in R1 = 2.2kΩ, with input voltage rated -10 to 12 V, VI(off) max 0.5 V and VI(on) min 3.0 V. |
| 3 | OUT (COLLECTOR) | output | Output/collector terminal of the built-in NPN transistor, rated for supply voltage VCC 50 V and output current IO 100 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ROHM Semicon |
| Package | SOT-416 |
| Category | Transistors |
| 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC |  |  | 50 | V |  | 2 |
| Input voltage | VIN | -10 |  | 12 | V |  | 2 |
| Output current | IO |  |  | 100 | mA |  | 2 |
| Collector current | IC(MAX) |  |  | 100 | mA |  | 2 |
| Power dissipation (DTC123EE) | PD |  |  | 150 | mW | Each terminal mounted on a reference land (*2) | 2 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 2 |
| Range of storage temperature | Tstg | -55 |  | 150 | ℃ |  | 2 |
| Input voltage (ON) | VI(on) | 3 |  |  | V | VO = 0.3V, IO = 20mA | 2 |
| Output voltage (ON) | VO(on) |  | 100 | 300 | mV | IO = 10mA, II = 0.5mA | 2 |
| Input voltage (OFF) | VI(off) |  |  | 0.5 | V | VCC = 5V, IO = 100μA | 2 |
| Input current | II |  |  | 3.8 | mA | VI = 5V | 2 |
| Output current (OFF) | IO(off) |  |  | 500 | nA | VCC = 50V, VI = 0V | 2 |
| DC current gain | GI | 20 |  |  | - | VO = 5V, IO = 20mA | 2 |
| Input resistance | R1 | 1.54 | 2.2 | 2.86 | kΩ |  | 2 |
| Resistance ratio | R2/R1 | 0.8 | 1 | 1.2 | - |  | 2 |

## CAD (KiCad official)

- Symbol: `DTC123EETL`
- Footprint: `Package_TO_SOT_SMD:SOT-416`
- 3D model: SOT-416, 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: `dtc123eetl-etched.step` / `dtc123eetl-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dtc123eetl.step` / `dtc123eetl.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ROHM Semicon datasheet](docs/dtc123eetl-datasheet.pdf) (12 pp, sha256 `68d69db641b42fea`, retrieved 2026-10-30, tier: manufacturer)
- **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/dtc123eetl-datasheet.pdf)