component
BSD3C121L
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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBSD3C121L
BORN · ESD And Surge Protection (TVS/ESD) · SOD-323
BSD3C121L 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 | 1 | passive | TVS terminal 1 of the single protected line (VWM 12.0V, min VBR 13.3V @ 1mA, max VC 19.0V @ IP=1A, 350W peak pulse power 8/20μs). |
| 2 | 2 | passive | TVS terminal 2 of the single protected line (VWM 12.0V, min VBR 13.3V @ 1mA, max VC 19.0V @ IP=1A, 350W 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Power | PPP | 350 | Watts | tp=8/20μs | 2 | ||
| Operating Temperature (Junction) | TJ | -55 | 150 | °C | 2 | ||
| Storage Temperature | TSTG | -55 | 150 | °C | 2 | ||
| Rated Stand-off Voltage | VWM | 12 | V | 2 | |||
| Minimum Breakdown Voltage | VBR | 13.3 | V | @ 1mA | 2 | ||
| Maximum Clamping Voltage | VC | 19 | V | @ IP = 1A | 2 | ||
| Maximum Clamping Voltage | VC | 28.6 | V | @ 8/20μs, IPP = 11.0A | 2 | ||
| Maximum Leakage Current | Id | 1 | μA | @VWM | 2 | ||
| Typical Capacitance | C | 1 | pF | @0V, 1 MHz | 2 |
CAD (KiCad official)
- Symbol:
BSD3C121L - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
bsd3c121l-etched.step/bsd3c121l-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bsd3c121l.step/bsd3c121l.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BORN datasheet (4 pp, sha256
69bb5803b335e2b4, 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).