# NCR401TR

**Nexperia** · LED Drivers · TO-236AB

NCR401TR 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 reference; ground current is 340 to 500 µA at VSUP = 10 V and IO = 0 A. |
| 2 | VSUP | power_in | Supply voltage input, maximum 18 V. |
| 3 | IO/VO | output | Constant-current output (10 mA typ, 8.5 to 11.5 mA) driving the LED; maximum output voltage 16 V at VSUP = 18 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | TO-236AB |
| Category | Display Modules / LED Drivers / Display 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 | 8.5 | 10 | 11.5 | 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 (standard footprint) | Ptot |  |  | 270 | mW | Tamb ≤ 25 °C; FR4 PCB, standard footprint | 3 |
| Total power dissipation (1 cm2 pad) | Ptot |  |  | 400 | mW | Tamb ≤ 25 °C; FR4 PCB, 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 junction to ambient (standard footprint) | Rth(j-a) |  |  | 465 | K/W | in free air; FR4 PCB, standard footprint | 4 |
| Thermal resistance junction to ambient (1 cm2 pad) | Rth(j-a) |  |  | 312 | K/W | in free air; FR4 PCB, mounting pad for collector 1 cm2 | 4 |
| Minimum voltage between supply and output | V(VSUP-VO)min |  | 1.4 |  | V | IO > 8.5 mA; Tamb = 25 °C; pulsed; tp ≤ 300 µs; δ ≤ 0.02 | 5 |
| Relative output current variation with ambient temperature | ΔIO/(IO×ΔTamb) |  | -0.3 |  | %/K | VSUP = 10 V; VO = 8.6 V; Tamb = 25 °C; pulsed; tp ≤ 300 µs; δ ≤ 0.02 | 5 |
| Relative output current variation with supply voltage | ΔIO/(IO×ΔVSUP) |  | 0.8 |  | %/V | VSUP = 10 V; VSUP - VO = 1.4 V; Tamb = 25 °C; pulsed; tp ≤ 300 µs; δ ≤ 0.02 | 5 |

## 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: `NCR401TR`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: TO-236AB (KiCad packages3D, STEP)
- 3D model files: `ncr401tr-etched.step` / `ncr401tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ncr401tr.step` / `ncr401tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/NCR401TR.pdf) (12 pp, sha256 `dcde6f873c95b3a0`, retrieved 2026-10-22, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/ncr401tr-datasheet.pdf)