component
BSD3A121V
Public Made by Adomby adom
BORN ESD And Surge Protection (TVS/ESD), SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 9d ago |
| viewers | 9d ago |
| bsd3a121v-etched.glb | 9d ago |
| bsd3a121v-etched.step | 9d ago |
| bsd3a121v-hero.glb | 9d ago |
| bsd3a121v-hero.overlay.json | 9d ago |
| bsd3a121v.glb | 9d ago |
| bsd3a121v.kicad_mod | 9d ago |
| bsd3a121v.kicad_sym | 9d ago |
| bsd3a121v.lbr | 9d ago |
| bsd3a121v.step | 9d ago |
| package.json | 9d ago |
| page.json | 9d ago |
| README.md | 9d ago |
BSD3A121V
BORN · ESD And Surge Protection (TVS/ESD) · SOD-323
BSD3A121V from BORN, in a SOD-323. 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 | Cathode | passive | Cathode of the unidirectional TVS diode, connected to the protected line (e.g. USB VBUS/power line) with VRWM 12.0 V, VBR 13.3 V min at 1 mA and VC 24 V max at IPP = 10 A (8/20μs). |
| 2 | Anode | passive | Anode of the unidirectional TVS diode, connected to ground in typical use, protecting against ESD up to ±30 kV (IEC 61000-4-2) and 240 W peak pulse power (8/20μs). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BORN |
| Package | SOD-323 |
| Category | Circuit 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 |
|---|---|---|---|---|---|---|---|
| Reverse Stand-Off Voltage | VRWM | 12 | V | 2 | |||
| Reverse Breakdown Voltage | VBR | 13.3 | V | IT=1mA | 2 | ||
| Reverse Leakage Current | IR | 1 | uA | VRWM=12V,T=25℃ | 2 | ||
| Clamping Voltage | VC | 24 | V | IPP=10A,tp=8/20μs | 2 | ||
| Junction Capacitance | Cj | 60 | pF | VR = 0V, f = 1MHz | 2 | ||
| Peak Pulse Power | PPP | 240 | Watts | tp =8/20μs | 2 | ||
| Peak Pulse Current | Ipp | 10 | A | tp =8/20μs (note1) | 2 | ||
| ESD per IEC 61000-4-2 (Air) | VESD | 30 | kV | 2 | |||
| ESD per IEC 61000-4-2 (Contact) | VESD | 30 | kV | 2 | |||
| Lead Soldering Temperature | TL | 260 | ℃ | 10 seconds | 2 | ||
| Junction Temperature | TJ | -55 | 150 | ℃ | 2 | ||
| Storage Temperature | Tstg | -55 | 150 | ℃ | 2 |
CAD (KiCad official)
- Symbol:
BSD3A121V - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
bsd3a121v-etched.step/bsd3a121v-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bsd3a121v.step/bsd3a121v.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BORN datasheet (4 pp, sha256
c8b8f76f2441fc93, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).