component
BSS123
Public Made by Adomby adom
Changjing MOSFETs, SOT-23. 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
markdownBSS123
Changjing · MOSFETs · SOT-23
BSS123 from Changjing, in a SOT-23. 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 | GATE | input | Voltage-controlled gate of the N-channel MOSFET, rated for VGS of ±20 V with a gate threshold of 1 to 2.8 V at VDS = VGS and ID = 250 µA. |
| 2 | SOURCE | passive | Source terminal of the N-channel MOSFET, with continuous source-drain diode current IS rated at 0.17 A. |
| 3 | DRAIN | passive | Drain terminal of the N-channel MOSFET, rated for VDS of 100 V and continuous drain current ID of 0.17 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Drain-Source Voltage | VDS | 100 | V | 1 | |||
| Gate-Source Voltage | VGS | -20 | 20 | V | 1 | ||
| Continuous Drain Current | ID | 0.17 | A | note 1 | 1 | ||
| Pulsed Drain Current | IDM | 0.68 | A | tp=10us | 1 | ||
| Continous Source-Drain Diode Current | IS | 0.17 | A | 1 | |||
| Power Dissipation | PD | 0.35 | W | 1 | |||
| Thermal Resistance from Junction to Ambient | RθJA | 357 | ℃/W | note 1 | 1 | ||
| Junction Temperature | TJ | 150 | ℃ | 1 | |||
| Storage Temperature | TSTG | -55 | 150 | ℃ | 1 | ||
| Lead Temperature for Soldering Purposes | TL | 260 | ℃ | 1/8'' from case for 10 s | 1 | ||
| Drain-source breakdown voltage | V(BR)DSS | 100 | V | VGS = 0V, ID =250µA | 2 | ||
| Zero gate voltage drain current | IDSS | 1 | µA | VDS =100V,VGS = 0V | 2 | ||
| Zero gate voltage drain current | IDSS | 10 | nA | VDS =20V,VGS = 0V | 2 | ||
| Gate-body leakage current | IGSS | -50 | 50 | nA | VGS =±20V, VDS = 0V | 2 | |
| Gate threshold voltage | VGS(th) | 1 | 2.8 | V | VDS =VGS, ID =250µA | 2 | |
| Drain-source on-resistance | RDS(on) | 10 | Ω | VGS =4.5V, ID =0.17A | 2 | ||
| Drain-source on-resistance | RDS(on) | 6 | Ω | VGS =10V, ID =0.17A | 2 | ||
| Forward tranconductance | gFS | 80 | mS | VDS =10V, ID =170mA | 2 | ||
| Diode forward voltage | VSD | 1.3 | V | IS=340mA, VGS = 0V | 2 | ||
| Input Capacitance | Ciss | 29 | 60 | pF | VDS =25V,VGS =0V,f =1MHz | 2 | |
| Output Capacitance | Coss | 10 | 15 | pF | VDS =25V,VGS =0V,f =1MHz | 2 | |
| Reverse Transfer Capacitance | Crss | 2 | 6 | pF | VDS =25V,VGS =0V,f =1MHz | 2 | |
| Total Gate Charge | Qg | 1.4 | 2 | nC | VDS=10V,ID=0.22A, VGS=10V | 2 | |
| Gate-Source Charge | Qgs | 0.15 | 0.25 | nC | VDS=10V,ID=0.22A, VGS=10V | 2 | |
| Gate-Drain Charge | Qgd | 0.2 | 0.4 | nC | VDS=10V,ID=0.22A, VGS=10V | 2 | |
| Turn-on delay time | td(on) | 8 | ns | VGS=10V,VDD=30V, ID=2.8A,RGEN=50Ω | 2 | ||
| Turn-on rise time | tr | 8 | ns | VGS=10V,VDD=30V, ID=2.8A,RGEN=50Ω | 2 | ||
| Turn-off delay time | td(off) | 13 | ns | VGS=10V,VDD=30V, ID=2.8A,RGEN=50Ω | 2 | ||
| Turn-off fall time | tf | 16 | ns | VGS=10V,VDD=30V, ID=2.8A,RGEN=50Ω | 2 |
CAD (KiCad official)
- Symbol:
BSS123 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
bss123-etched.step/bss123-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bss123.step/bss123.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (5 pp, sha256
3fedce2e98afaaba, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).