# NZX4V7B

**Nexperia** · Zener Diodes · DO-204AH(DO-35)

NZX4V7B from Nexperia, in a DO-204AH(DO-35). 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 | cathode | passive | The cathode is pin 1, and the marking band on the package indicates the cathode. |
| 2 | anode | passive | The anode is pin 2 of the two-lead axial glass package. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | DO-204AH(DO-35) |
| Category | Diodes |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Working voltage (B grade, 4V7) | VZ | 4.5 |  | 4.7 | V | Tj = 25 °C; IZ = 5 mA | 4 |
| Differential resistance | rdif |  |  | 100 | Ω | IZ = 5 mA | 4 |
| Reverse current | IR |  |  | 3 | A | VR = 2 V | 4 |
| Forward voltage | VF |  |  | 1.5 | V | IF = 200 mA | 3 |
| Forward current | IF |  |  | 250 | mA |  | 2 |
| Total power dissipation | Ptot |  |  | 500 | mW | Ttp ≤ 25 °C | 2 |
| Junction temperature | Tj |  |  | 175 | °C |  | 2 |
| Ambient temperature | Tamb | -55 |  | 175 | °C |  | 2 |
| Storage temperature | Tstg | -65 |  | 175 | °C |  | 2 |
| Thermal resistance from junction to ambient | Rth(j-a) |  |  | 380 | K/W | in free air; FR4 PCB without metallization pad, lead length max 8 mm | 2 |
| Thermal resistance from junction to tie-point | Rth(j-t) |  |  | 300 | K/W | FR4 PCB without metallization pad, lead length max 8 mm | 2 |

## CAD (KiCad official)

- Symbol: `NZX4V7B`
- Footprint: `Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal`
- 3D model: DO-204AH(DO-35) (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/NZX4V7B.pdf) (13 pp, sha256 `f5f1538bda41f295`, retrieved 2026-10-22, tier: manufacturer)
- **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/nzx4v7b-datasheet.pdf)