# SZ1SMB5936BT3G

**onsemi** · Zener Diodes · SMB

SZ1SMB5936BT3G from onsemi, in a SMB. 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SMB |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Zener Voltage @ IZT | VZ | 28.5 | 30 | 31.5 | V | @ IZT = 12.5 mA; TL = 30°C unless otherwise noted | 3 |
| Zener voltage tolerance (type number designation) |  | -5 |  | 5 | % | Note 2: type numbers indicate a tolerance of ±5% | 3 |
| Maximum Zener Impedance @ IZT | ZZT |  |  | 28 | Ω | @ IZT = 12.5 mA; IZ(ac) = 0.1 IZ(dc), 60 Hz; TL = 30°C unless otherwise noted | 3 |
| Maximum Zener Impedance @ IZK | ZZK |  |  | 750 | Ω | @ IZK = 0.25 mA; IZ(ac) = 0.1 IZ(dc), 60 Hz; TL = 30°C unless otherwise noted | 3 |
| Reverse Leakage Current @ VR | IR |  |  | 1 | µA | @ VR = 22.8 V; TL = 30°C unless otherwise noted | 3 |
| Maximum DC Zener Current | IZM |  |  | 50 | mA | TL = 30°C unless otherwise noted | 3 |
| Forward Voltage @ IF | VF |  |  | 1.5 | V | @ IF = 200 mA(dc) for all types | 3 |
| Maximum Steady State Power Dissipation @ TL = 75°C | PD |  |  | 3 | W | TL = 75°C; measured at zero lead length | 1 |
| Maximum Steady State Power Dissipation @ TA = 25°C | PD |  |  | 550 | mW | TA = 25°C; FR-4 board, recommended footprint (Note 1) | 1 |
| Thermal Resistance from Junction-to-Ambient | RJA |  |  | 226 | °C/W | Junction-to-Ambient; FR-4 board, recommended footprint (Note 1) | 1 |
| Thermal Resistance from Junction-to-Lead | RJL |  |  | 40 | °C/W | Junction-to-Lead; measured at zero lead length | 1 |
| Operating and Storage Temperature Range | TJ, Tstg | -65 |  | 150 | °C |  | 1 |
| Derate Above 75°C (steady state power) |  |  | 25 |  | mW/°C | Derate above TL = 75°C | 1 |
| Derate Above 25°C (steady state power) |  |  | 4.4 |  | mW/°C | Derate above TA = 25°C | 1 |

## CAD (KiCad official)

- Symbol: `SZ1SMB5936BT3G`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `sz1smb5936bt3g-etched.step` / `sz1smb5936bt3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sz1smb5936bt3g.step` / `sz1smb5936bt3g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589971512783904768) (7 pp, sha256 `b2ddba7d745c56c9`, retrieved 2026-10-16, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/sz1smb5936bt3g-datasheet.pdf)