# LBZX84C51LT1G

**LRC** · Zener Diodes · SOT-23

LBZX84C51LT1G from LRC, in a SOT-23. 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 | Anode | passive | Anode terminal of the zener diode; the datasheet pinout designates pin 1 as Anode, and the forward voltage is 0.90 V max at IF = 10 mA. |
| 2 | NC | unconnected | No connection; the datasheet pinout lists pin 2 as No Connection. |
| 3 | Cathode | passive | Cathode terminal of the zener diode; for the LBZX84C51LT1G the nominal zener voltage VZ is 51 V (min 48 V, max 54 V) at IZT = 5 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SOT-23 |
| Category | Diodes |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (VZ1) | VZ1 | 48 | 51 | 54 | V | @ IZT1 = 2 mA | 2 |
| Zener dynamic impedance (ZZT1) | ZZT1 |  |  | 180 | Ω | @ IZT1 = 2 mA | 2 |
| Zener voltage (VZ2) | VZ2 | 47.6 |  | 54 | V | @ IZT2 = 0.1 mA | 2 |
| Zener dynamic impedance (ZZT2) | ZZT2 |  |  | 400 | Ω | @ IZT4 = 0.5 mA (as printed) | 2 |
| Zener voltage (VZ3) | VZ3 | 48.1 |  | 54.6 | V | @ IZT3 = 10 mA | 2 |
| Zener dynamic impedance (ZZT3) | ZZT3 |  |  | 100 | Ω | @ IZT3 = 10 mA | 2 |
| Maximum reverse leakage current | IR |  |  | 0.05 | µA | @ VR = 35.7 V | 2 |
| Diode capacitance | C |  |  | 40 | pF | @ VR = 0, f = 1 MHz | 2 |
| Forward voltage | VF |  |  | 0.9 | V | @ IF = 10 mA | 2 |
| Total device dissipation, FR-5 board (TA = 25°C) | PD |  |  | 225 | mW | FR-5 board (Note 1), TA = 25°C | 1 |
| Derating above 25°C, FR-5 board |  |  |  | 1.8 | mW/°C | FR-5 board, above TA = 25°C | 1 |
| Thermal resistance junction to ambient, FR-5 board | RθJA |  |  | 556 | °C/W | FR-5 board (Note 1) | 1 |
| Total device dissipation, alumina substrate (TA = 25°C) | PD |  |  | 300 | mW | Alumina substrate (Note 2), TA = 25°C | 1 |
| Derating above 25°C, alumina substrate |  |  |  | 2.4 | mW/°C | Alumina substrate, above TA = 25°C | 1 |
| Thermal resistance junction to ambient, alumina substrate | RθJA |  |  | 417 | °C/W | Alumina substrate (Note 2) | 1 |
| Junction and storage temperature | TJ, Tstg | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `LBZX84C51LT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `lbzx84c51lt1g-etched.step` / `lbzx84c51lt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lbzx84c51lt1g.step` / `lbzx84c51lt1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LRC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603128979582824448) (6 pp, sha256 `974ba6d0d0828e7b`, retrieved 2026-10-17, 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/lbzx84c51lt1g-datasheet.pdf)