# DTC044EMT2L

**ROHM Semicon** · Digital Transistors · SOT-723

DTC044EMT2L from ROHM Semicon, in a SOT-723. 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 | IN (BASE) | input | Input (base) pin with built-in R1 = 47kΩ series resistor, so no external input resistor is needed; VI(off) max 0.8V, VI(on) min 3.0V, input voltage rating 40 to -10V. |
| 2 | GND (EMITTER) | power_in | Ground (emitter) pin, with R2 = 47kΩ connected between it and the base. |
| 3 | OUT (COLLECTOR) | output | Output (collector) pin rated for VCC 50V, IC(MAX) 100mA and output current IO 30mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ROHM Semicon |
| Package | SOT-723 |
| 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 |
|---|---|---|---|---|---|---|---|
| Input voltage (off) | VI(off) |  |  | 0.8 | V | VCC = 5V, IO = 100μA | 2 |
| Input voltage (on) | VI(on) | 3 |  |  | V | VO = 0.3V, IO = 2mA | 2 |
| Output voltage | VO(on) |  | 50 | 150 | mV | IO = 5mA, II = 0.5mA | 2 |
| Input current | II |  |  | 180 | μA | VI = 5V | 2 |
| Output current | IO(off) |  |  | 500 | nA | VCC = 50V, VI = 0V | 2 |
| DC current gain | GI | 80 |  |  |  | VO = 10V, IO = 5mA | 2 |
| Input resistance | R1 | 32.9 | 47 | 61.1 | kΩ |  | 2 |
| Resistance ratio | R2/R1 | 0.8 | 1 | 1.2 |  |  | 2 |
| Transition frequency | fT |  | 250 |  | MHz | VCE = 10V, IE = -5mA, f = 100MHz (characteristics of built-in transistor) | 2 |
| Supply voltage | VCC |  |  | 50 | V | Ta = 25°C | 2 |
| Input voltage | VIN | -10 |  | 40 | V | Ta = 25°C | 2 |
| Output current | IO |  |  | 30 | mA | Ta = 25°C | 2 |
| Collector current | IC(MAX) |  |  | 100 | mA | Ta = 25°C, characteristics of built-in transistor | 2 |
| Power dissipation DTC044EM | PD |  |  | 150 | mW | Ta = 25°C, each terminal mounted on a reference land | 2 |
| Junction temperature | Tj |  |  | 150 | ℃ | Ta = 25°C | 2 |
| Storage temperature range | Tstg | -55 |  | 150 | ℃ | Ta = 25°C | 2 |

## CAD (KiCad official)

- Symbol: `DTC044EMT2L`
- Footprint: `Package_TO_SOT_SMD:SOT-723`
- 3D model: SOT-723, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.5 mm nominal SOT-723 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: `dtc044emt2l-etched.step` / `dtc044emt2l-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dtc044emt2l.step` / `dtc044emt2l.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ROHM Semicon datasheet](docs/dtc044emt2l-datasheet.pdf) (9 pp, sha256 `6d53b1f2ff67cd55`, 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/dtc044emt2l-datasheet.pdf)