# 2SA1774TLQ

**ROHM Semicon** · Bipolar (BJT) · SOT-416

2SA1774TLQ 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 | E | passive | Emitter of the PNP transistor (2SA1774, SOT-416/EMT3); emitter-base breakdown BVEBO is -6V min and VEBO max is -6V. |
| 2 | B | passive | Base of the PNP transistor (2SA1774, SOT-416/EMT3); base drive IB = -5mA is used for the VCE(sat) test at IC = -50mA. |
| 3 | C | passive | Collector of the PNP transistor (2SA1774, SOT-416/EMT3); VCEO is -50V, VCBO is -60V, IC is -150mA continuous and ICP is -200mA pulsed. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ROHM Semicon |
| Package | SOT-416 |
| 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-base breakdown voltage | BVCBO | -60 |  |  | V | IC = -50μA | 2 |
| Collector-emitter breakdown voltage | BVCEO | -50 |  |  | V | IC = -1mA | 2 |
| Emitter-base breakdown voltage | BVEBO | -6 |  |  | V | IE = -50μA | 2 |
| Collector cut-off current | ICBO |  |  | -100 | nA | VCB = -60V | 2 |
| Emitter cut-off current | IEBO |  |  | -100 | nA | VEB = -6V | 2 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -500 | mV | IC = -50mA, IB = -5mA | 2 |
| DC current gain | hFE | 120 |  | 390 | - | VCE = -6V, IC = -1mA | 2 |
| Output capacitance | Cob |  | 4 | 5 | pF | VCB = -12V, IE = 0A, f = 1MHz | 2 |
| Collector-base voltage | VCBO | -60 |  |  | V |  | 2 |
| Collector-emitter voltage | VCEO | -50 |  |  | V |  | 2 |
| Emitter-base voltage | VEBO | -6 |  |  | V |  | 2 |
| Collector current | IC | -150 |  |  | mA |  | 2 |
| Collector current (pulse) | ICP | -200 |  |  | mA | Pw=1ms, Single Pulse | 2 |
| Power dissipation (2SA1774, SOT-416) | PD |  |  | 150 | 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: `2SA1774TLQ`
- 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: `2sa1774tlq-etched.step` / `2sa1774tlq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sa1774tlq.step` / `2sa1774tlq.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/8589915846618615808) (15 pp, sha256 `ab1344a75ab1ce3f`, retrieved 2026-10-17, 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/2sa1774tlq-datasheet.pdf)