# BZX85C9V1-TAP

**Vishay Intertech** · Zener Diodes · DO-41

BZX85C9V1-TAP from Vishay Intertech, in a DO-41. 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 | K | passive | Cathode, marked by the cathode identification band; the Zener diode is reverse-biased with this pin positive, with BZX85C9V1 VZ of 8.5 to 9.6 V (nom. 9.1 V) at IZT1 = 25 mA. |
| 2 | A | passive | Anode; Ptot is 1300 mW max provided leads at 4 mm from case are kept at ambient temperature, and Tj max is 175 °C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| Package | DO-41 |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage | VZ | 8.5 | 9.1 | 9.6 | V | at IZT1 = 25 mA, tp = 5 ms | 2 |
| Test current | IZT1 |  |  | 25 | mA |  | 2 |
| Test current 2 | IZT2 |  |  | 0.5 | mA |  | 2 |
| Reverse leakage current | IR |  |  | 1 | μA | at VR = 6.8 V | 2 |
| Dynamic resistance | ZZ |  |  | 5 | Ω | at IZT1, f = 1 kHz | 2 |
| Dynamic resistance (knee) | ZZK |  |  | 200 | Ω | at IZT2, f = 1 kHz | 2 |
| Temperature coefficient of Zener voltage | αVZ | 0.035 |  | 0.075 | %/°C | at IZT1 | 2 |
| Admissible Zener current | IZ |  |  | 120 | mA | leads at 10 mm from case kept at ambient temperature | 2 |
| Power dissipation | Ptot |  |  | 1300 | mW | leads at 4 mm from case kept at ambient temperature, Tamb = 25 °C | 1 |
| Junction temperature | Tj |  |  | 175 | °C |  | 1 |
| Storage temperature range | Tstg | -55 |  | 175 | °C |  | 1 |
| Thermal resistance junction to ambient | RthJA |  |  | 110 | K/W | leads at 4 mm from case kept at ambient temperature | 1 |

## CAD (KiCad official)

- Symbol: `BZX85C9V1-TAP`
- Footprint: `Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal`
- 3D model: DO-41 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [Vishay Intertech datasheet](docs/bzx85c9v1-tap-datasheet.pdf) (6 pp, sha256 `95ae9b8ac65e334f`, retrieved 2026-10-31, 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/bzx85c9v1-tap-datasheet.pdf)