# 1SMB5928BT3G

**onsemi** · Zener Diodes · SMB

1SMB5928BT3G 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 (VZ), min | VZ | 12.35 |  |  | V | @ IZT, TL = 30C (Note 3: measured at 25C ambient) | 3 |
| Reverse Zener Voltage (VZ), nominal | VZ |  | 13 |  | V | @ IZT, TL = 30C | 3 |
| Reverse Zener Voltage (VZ), max | VZ |  |  | 13.65 | V | @ IZT, TL = 30C | 3 |
| Zener voltage tolerance (type number designation) |  | -5 |  | 5 | % | Note 2: type numbers listed indicate a tolerance of 5% | 3 |
| Maximum Zener Impedance @ IZT | ZZT |  |  | 7 | ohm | @ IZT | 3 |
| Maximum Zener Impedance @ IZK | ZZK |  |  | 550 | ohm | @ IZK = 0.25 mA | 3 |
| Reverse Leakage Current | IR |  | 1 |  | µA | @ VR = 9.9 V | 3 |
| Maximum DC Zener Current | IZM |  |  | 115 | mA(dc) |  | 3 |
| Forward Voltage | VF |  |  | 1.5 | V | @ IF = 200 mA(dc), for all types | 2 |
| Maximum Steady State Power Dissipation | PD |  |  | 3 | W | @ TL = 75C, measured at zero lead length | 1 |
| Derate above 75C (power dissipation at TL) | PD |  | 25 |  | mW/C | derate above 75C | 1 |
| Thermal Resistance, Junction-to-Lead | RJL |  | 40 |  | C/W |  | 1 |
| Maximum Steady State Power Dissipation (ambient) | PD |  |  | 550 | mW | @ TA = 25C (Note 1, FR-4 board, recommended footprint) | 1 |
| Derate above 25C (power dissipation at TA) | PD |  | 4.4 |  | mW/C | derate above 25C | 1 |
| Thermal Resistance, Junction-to-Ambient | RJA |  | 226 |  | C/W | Note 1: FR-4 board, recommended footprint | 1 |
| Operating and Storage Temperature Range | TJ, Tstg | -65 |  | 150 | C |  | 1 |

## CAD (KiCad official)

- Symbol: `1SMB5928BT3G`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `1smb5928bt3g-etched.step` / `1smb5928bt3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1smb5928bt3g.step` / `1smb5928bt3g.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/8586176194445758464) (6 pp, sha256 `52985d4757f03142`, retrieved 2026-10-14, 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/1smb5928bt3g-datasheet.pdf)