component
CJ2321A
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
markdownCJ2321A
Changjing · MOSFETs · SOT-23
CJ2321A 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 | Gate terminal of the P-channel MOSFET; gate-source voltage limited to ±12 V with threshold of -0.4 to -1.0 V. |
| 2 | SOURCE | passive | Source terminal of the P-channel MOSFET; continuous source-drain diode current is limited to -0.59 A. |
| 3 | DRAIN | passive | Drain terminal of the P-channel MOSFET; drain-source voltage rated -20 V and continuous drain current -2.9 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | Triode/MOS Tube/Transistor |
| 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 breakdown voltage | V(BR)DSS | -20 | V | VGS = 0V, ID = -10µA | 2 | ||
| Gate-source leakage | IGSS | -100 | 100 | nA | VDS = 0V, VGS = ±12V | 2 | |
| Zero gate voltage drain current | IDSS | -1 | µA | VDS = -16V, VGS = 0V | 2 | ||
| Gate-source threshold voltage | VGS(th) | -0.4 | -1 | V | VDS = VGS, ID = -250µA | 2 | |
| Drain-source on-state resistance | RDS(on) | 0.04 | 0.057 | Ω | VGS = -4.5V, ID = -3.3A | 2 | |
| Drain-source on-state resistance | RDS(on) | 0.055 | 0.076 | Ω | VGS = -2.5V, ID = -2.8A | 2 | |
| Drain-source on-state resistance | RDS(on) | 0.095 | 0.12 | Ω | VGS = -1.8V, ID = -2.3A | 2 | |
| Forward diode voltage | VSD | -1.2 | V | VGS = 0V, IS = -1.6A | 2 | ||
| Drain-Source Voltage | VDS | -20 | V | Ta=25℃ | 1 | ||
| Gate-Source Voltage | VGS | -12 | 12 | V | Ta=25℃ | 1 | |
| Continuous Drain Current | ID | -2.9 | A | Ta=25℃ | 1 | ||
| Pulsed Drain Current | IDM | -12 | A | Ta=25℃ | 1 | ||
| Continuous Source-Drain Diode Current | IS | -0.59 | A | Ta=25℃ | 1 | ||
| Maximum Power Dissipation | PD | 0.35 | W | Ta=25℃ | 1 | ||
| Operation Junction and Storage Temperature Range | TJ,Tstg | -50 | 150 | ℃ | 1 | ||
| Thermal Resistance from Junction to Ambient | RθJA | 357 | ℃/W | 1 | |||
| Forward transconductance | gfS | 3 | S | VDS = -5V, ID = -3.3A | 2 | ||
| Input capacitance | Ciss | 715 | pF | VDS = -6V, VGS = 0V, f = 1MHz | 2 | ||
| Output capacitance | Coss | 170 | pF | VDS = -6V, VGS = 0V, f = 1MHz | 2 | ||
| Reverse transfer capacitance | Crss | 120 | pF | VDS = -6V, VGS = 0V, f = 1MHz | 2 | ||
| Total gate charge | Qg | 13 | nc | VDS = -6V, VGS = -4.5V, ID = -3.3A | 2 | ||
| Gate-source charge | Qgs | 1.2 | nc | VDS = -6V, VGS = -4.5V, ID = -3.3A | 2 | ||
| Gate-drain charge | Qgd | 2.2 | nc | VDS = -6V, VGS = -4.5V, ID = -3.3A | 2 | ||
| Turn-on delay time | td(on) | 25 | ns | VGEN=-4.5V, VDD=-6V, ID=-1.0A, RG=6Ω, RL=6Ω | 2 | ||
| Rise time | tr | 55 | ns | VGEN=-4.5V, VDD=-6V, ID=-1.0A, RG=6Ω, RL=6Ω | 2 | ||
| Turn-off delay time | td(off) | 90 | ns | VGEN=-4.5V, VDD=-6V, ID=-1.0A, RG=6Ω, RL=6Ω | 2 | ||
| Fall time | tf | 60 | ns | VGEN=-4.5V, VDD=-6V, ID=-1.0A, RG=6Ω, RL=6Ω | 2 |
CAD (KiCad official)
- Symbol:
CJ2321A - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
cj2321a-etched.step/cj2321a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cj2321a.step/cj2321a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (5 pp, sha256
8602e0baa14e5da9, 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).