component
BZW04-28B
Public Made by Adomby adom
STMicroelectronics TVS, DO-15. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
main
BZW04-28B
STMicroelectronics · TVS · DO-15
BZW04-28B from STMicroelectronics, in a DO-15. 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 | 1 | passive | Terminal 1 of an unpolarised fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | DO-15 |
| Category | TVS/Fuse/Board Level Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage (min) | VBR | 31.4 | V | at IBR = 1 mA | 3 | ||
| Reverse leakage current (max) | IRM | 1 | µA | at VRM = 28.2 V, 25 °C | 3 | ||
| Clamping voltage (max), 10/1000 µs | VCL | 45.7 | V | 10/1000 µs | 3 | ||
| Peak pulse current (max), 10/1000 µs | IPP | 8.8 | A | 10/1000 µs | 3 | ||
| Dynamic resistance (max), 10/1000 µs | RD | 1.24 | Ω | 10/1000 µs | 3 | ||
| Clamping voltage (max), 8/20 µs | VCL | 59 | V | 8/20 µs | 3 | ||
| Peak pulse current (max), 8/20 µs | IPP | 39 | A | 8/20 µs | 3 | ||
| Dynamic resistance (max), 8/20 µs | RD | 0.621 | Ω | 8/20 µs | 3 | ||
| Peak pulse power dissipation | PPP | 400 | W | 10/1000 µs, Tj initial = Tamb | 2 | ||
| Peak pulse voltage, air discharge | VPP | 30 | kV | IEC 61000-4-2 (C = 150 pF, R = 330 Ω), air discharge | 2 | ||
| Peak pulse voltage, contact discharge | VPP | 30 | kV | IEC 61000-4-2 (C = 150 pF, R = 330 Ω), contact discharge | 2 | ||
| Storage temperature range | Tstg | -65 | 175 | °C | 2 | ||
| Operating junction temperature range | Tj | -55 | 175 | °C | 2 | ||
| Maximum lead temperature for soldering | TL | 260 | °C | during 10 s at 5 mm from case | 2 | ||
| Temperature coefficient of VBR | αT | 9.8 | 10-4/°C | 3 | |||
| Junction capacitance | C | 510 | pF | 3 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | • Lead finishing: matte tin plating Complies with the following standards | 1 |
CAD (KiCad official)
- Symbol:
BZW04-28B - Footprint:
Diode_THT:D_DO-15_P12.70mm_Horizontal - 3D model: DO-15 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (12 pp, sha256
20e31a5806289125, retrieved 2026-10-30, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins, primarytwo-terminal convention(convention), consensusoff(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).
# BZW04-28B
**STMicroelectronics** · TVS · DO-15
BZW04-28B from STMicroelectronics, in a DO-15. 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 | 1 | passive | Terminal 1 of an unpolarised fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | DO-15 |
| Category | TVS/Fuse/Board Level Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage (min) | VBR | 31.4 | | | V | at IBR = 1 mA | 3 |
| Reverse leakage current (max) | IRM | | | 1 | µA | at VRM = 28.2 V, 25 °C | 3 |
| Clamping voltage (max), 10/1000 µs | VCL | | | 45.7 | V | 10/1000 µs | 3 |
| Peak pulse current (max), 10/1000 µs | IPP | | | 8.8 | A | 10/1000 µs | 3 |
| Dynamic resistance (max), 10/1000 µs | RD | | | 1.24 | Ω | 10/1000 µs | 3 |
| Clamping voltage (max), 8/20 µs | VCL | | | 59 | V | 8/20 µs | 3 |
| Peak pulse current (max), 8/20 µs | IPP | | | 39 | A | 8/20 µs | 3 |
| Dynamic resistance (max), 8/20 µs | RD | | | 0.621 | Ω | 8/20 µs | 3 |
| Peak pulse power dissipation | PPP | | | 400 | W | 10/1000 µs, Tj initial = Tamb | 2 |
| Peak pulse voltage, air discharge | VPP | | | 30 | kV | IEC 61000-4-2 (C = 150 pF, R = 330 Ω), air discharge | 2 |
| Peak pulse voltage, contact discharge | VPP | | | 30 | kV | IEC 61000-4-2 (C = 150 pF, R = 330 Ω), contact discharge | 2 |
| Storage temperature range | Tstg | -65 | | 175 | °C | | 2 |
| Operating junction temperature range | Tj | -55 | | 175 | °C | | 2 |
| Maximum lead temperature for soldering | TL | | | 260 | °C | during 10 s at 5 mm from case | 2 |
| Temperature coefficient of VBR | αT | | 9.8 | | 10-4/°C | | 3 |
| Junction capacitance | C | | 510 | | pF | | 3 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | | tin | • Lead finishing: matte tin plating Complies with the following standards | 1 |
## CAD (KiCad official)
- Symbol: `BZW04-28B`
- Footprint: `Diode_THT:D_DO-15_P12.70mm_Horizontal`
- 3D model: DO-15 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/bzw04-28b.pdf) (12 pp, sha256 `20e31a5806289125`, retrieved 2026-10-30, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal 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/bzw04-28b-datasheet.pdf)