# LMBZ5250BLT1G

**LRC** · Zener Diodes · SOT-23(TO-236AB)

LMBZ5250BLT1G from LRC, in a SOT-23(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 | Anode | passive | Anode terminal of the Zener diode, identified as pin 1 in the datasheet pinout (1-Anode, 2-No Connection, 3-Cathode). |
| 2 | NC | unconnected | No internal connection; the datasheet pinout lists pin 2 as No Connection. |
| 3 | Cathode | passive | Cathode terminal of the Zener diode, identified as pin 3 in the datasheet pinout; the datasheet states the cathode is indicated by a polarity band on the package. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SOT-23(TO-236AB) |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Zener Voltage @ IZT | VZ | 19 | 20 | 21 | V | @ IZT = 6.2 mA; pulse test at TA = 25°C (Note 3) | 3 |
| Maximum Zener Impedance @ IZT | ZZT |  |  | 25 |  | @ IZT = 6.2 mA | 3 |
| Maximum Zener Impedance @ IZK | ZZK |  |  | 600 |  | @ IZK = 0.25 mA | 3 |
| Forward Voltage @ IF | VF |  |  | 0.95 | V | @ IF = 10 mA | 2 |
| Forward Voltage @ IF (all types) | VF |  |  | 0.9 | V | @ IF = 10 mA | 3 |
| Total Power Dissipation on FR-5 Board @ TA = 25°C | PD |  |  | 225 | mW | FR-5 board (Note 1), TA = 25°C | 1 |
| Total Power Dissipation on Alumina Substrate @ TA = 25°C | PD |  |  | 300 | mW | Alumina substrate (Note 2), TA = 25°C | 1 |
| Thermal Resistance Junction-to-Ambient (FR-5 board) | RJA |  |  | 556 | °C/W | FR-5 board (Note 1) | 1 |
| Thermal Resistance Junction-to-Ambient (alumina substrate) | RJA |  |  | 417 | °C/W | Alumina substrate (Note 2) | 1 |
| Junction and Storage Temperature Range | TJ,Tstg | -65 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `LMBZ5250BLT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23(TO-236AB) (KiCad packages3D, STEP)
- 3D model files: `lmbz5250blt1g-etched.step` / `lmbz5250blt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lmbz5250blt1g.step` / `lmbz5250blt1g.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/8590226835167338496) (6 pp, sha256 `2c2e315ad416a912`, retrieved 2026-10-15, 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/lmbz5250blt1g-datasheet.pdf)