# NCR402TR

**Nexperia** · LED Drivers · TO-236AB

NCR402TR from Nexperia, in a TO-236AB. 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 | power_in | Ground connection of the device; the datasheet gives no further limit for this pin. |
| 2 | VSUP | power_in | Supply voltage input, with a maximum rating of 18 V. |
| 3 | IO/VO | output | Output current/output voltage pin that delivers the stabilized 20 mA LED current, with output voltage rated up to 16 V when VSUP = 18 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | TO-236AB |
| Category | LED Drivers |
| 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 |
|---|---|---|---|---|---|---|---|
| output current | IO | 17 | 20 | 23 | mA | VSUP = 10 V; VO = 8.6 V; Tamb = 25 °C; pulsed; tp ≤ 300 µs; δ ≤ 0.02 | 5 |
| ground current | IGND | 340 | 420 | 500 | µA | VSUP = 10 V; IO = 0 A; Tamb = 25 °C; pulsed; tp ≤ 300 µs; δ ≤ 0.02 | 5 |
| supply voltage | VSUP |  |  | 18 | V |  | 3 |
| output voltage | VO |  |  | 16 | V | VSUP = 18 V | 3 |
| reverse voltage | VR |  |  | 0.5 | V | Between all terminals | 3 |
| total power dissipation | Ptot |  |  | 270 | mW | Tamb ≤ 25 °C; device mounted on FR4 PCB; single-sided copper; tin-plated and standard footprint | 3 |
| total power dissipation | Ptot |  |  | 400 | mW | Device mounted on FR4 PCB; single-sided copper; tin-plated and mounting pad for output 1 cm2 | 3 |
| junction temperature | Tj |  |  | 150 | °C |  | 3 |
| ambient temperature | Tamb | -55 |  | 150 | °C |  | 3 |
| storage temperature | Tstg | -65 |  | 150 | °C |  | 3 |
| thermal resistance from junction to ambient | Rth(j-a) |  |  | 465 | K/W | In free air; device mounted on FR4 PCB; single-sided copper; tin-plated and standard footprint | 4 |
| thermal resistance from junction to ambient | Rth(j-a) |  |  | 312 | K/W | In free air; device mounted on FR4 PCB; single-sided copper; tin-plated and mounting pad for collector 1 cm2 | 4 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | tin | [1] Between all terminals. [2] Device mounted on an FR4 Printed-Circuit Board (PCB); single-sided copper; tin-plated and standard | 3 |

## CAD (KiCad official)

- Symbol: `NCR402TR`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: TO-236AB (KiCad packages3D, STEP)
- 3D model files: `ncr402tr-etched.step` / `ncr402tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ncr402tr.step` / `ncr402tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588949951606480896) (12 pp, sha256 `93f8db5e5b2d4490`, retrieved 2026-10-16, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/ncr402tr-datasheet.pdf)