component

BZW04-28B

Public Made by Adom

by 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.

componenttvs-fuse-board level protectionbzw04-28bfactory-2.0.0extractor-text

Verified BZW04-28B

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier mfr, 2 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: BZW04-28B · DO-15 · 2 pins
  • ✓copper: 2 copper pads, none touching another net
  • ✓datasheet: unpolarised two-terminal part: pins 1 and 2 by library convention, no names to check
  • ✓distributor: lcsc C1665834, digikey 4878-BZW04-28BCT-ND, mouser 637-BZW04-28B
  • ✓family: D_DO-15_P12.70mm_Horizontal
  • ✓files: 6 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-nohwcgpy/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 1 records
  • •package_fit (skip): the datasheet dimensions give no height or body size to compare (datasheet p.6)
  • ✓pads: 2 pins = 2 pads
  • ✓pose: 1 STEP(s) Z-up, seated, centred
  • ✓symbol: 2 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ bzw04-28b.kicad_sym✓ bzw04-28b.kicad_mod✓ bzw04-28b.step
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Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
Name Last commit message Last updated
docs bzw04-28b: hero re-rendered with the chip (after the 10-30 render outage) · Ray 10d ago
viewers bzw04-28b: viewers · Ray 10d ago
bzw04-28b-hero.glb Publish 0.1.0 · Ray 10d ago
bzw04-28b-hero.overlay.json Publish 0.1.0 · Ray 10d ago
bzw04-28b.glb Publish 0.1.0 · Ray 10d ago
bzw04-28b.kicad_mod Publish 0.1.0 · Ray 10d ago
bzw04-28b.kicad_sym Publish 0.1.0 · Ray 10d ago
bzw04-28b.lbr Publish 0.1.0 · Ray 10d ago
bzw04-28b.step Publish 0.1.0 · Ray 10d ago
package.json Publish 0.1.0 · Ray 10d ago
page.json Set visibility: public · Ray 10d ago
README.md Publish 0.1.0 · Ray 10d ago
verification.json Verified: Published by the parts factory: tier mfr, 2 pins · Ray 10d ago

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, 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