component
ST3421SRG
Public Made by Adomby adom
STANSON Tech 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
markdownST3421SRG
STANSON Tech · MOSFETs · SOT-23
ST3421SRG from STANSON Tech, 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 of the P-channel enhancement MOSFET; the gate-source voltage is rated ±20 V (VGSS). |
| 2 | Source | passive | Source of the P-channel MOSFET; the continuous source current (diode conduction) is rated -1.25 A (IS). |
| 3 | Drain | passive | Drain of the P-channel MOSFET; the drain-source voltage is rated -60 V (VDSS) with continuous drain current -5.0 A at TA=25°C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STANSON Tech |
| 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 | VDSS | -60 | V | 2 | |||
| Gate-Source Voltage | VGSS | -20 | 20 | V | 2 | ||
| Continuous Drain Current | ID | -5 | A | TA=25℃ | 2 | ||
| Continuous Drain Current | ID | -3.5 | A | TA=70℃ | 2 | ||
| Pulsed Drain Current | IDM | -12 | A | 2 | |||
| Continuous Source Current (Diode Conduction) | IS | -1.25 | A | 2 | |||
| Power Dissipation | PD | 1.25 | W | TA=25℃ | 2 | ||
| Power Dissipation | PD | 0.8 | W | TA=70℃ | 2 | ||
| Operation Junction Temperature | TJ | 150 | ℃ | 2 | |||
| Storage Temperature Range | TSTG | -55 | 150 | ℃ | 2 | ||
| Thermal Resistance-Junction to Ambient | RθJA | 100 | ℃/W | 2 | |||
| Drain-Source Breakdown Voltage | V(BR)DSS | -60 | V | VGS=0V,ID=-10uA | 3 | ||
| Gate Threshold Voltage | VGS(th) | -1 | -3 | V | VDS=VGS,ID=-250uA | 3 | |
| Gate Leakage Current | IGSS | -100 | 100 | nA | VDS=0V,VGS=±20V | 3 | |
| Zero Gate Voltage Drain Current | IDSS | -1 | uA | VDS=-48V,VGS=0V | 3 | ||
| Zero Gate Voltage Drain Current | IDSS | -10 | uA | VDS=-48V,VGS=0V, TJ=55℃ | 3 | ||
| Drain-source On-Resistance | RDS(on) | 0.15 | 0.16 | Ω | VGS=-10V,ID=-5.0A | 3 | |
| Drain-source On-Resistance | RDS(on) | 0.185 | 0.2 | Ω | VGS=-4.5V,ID=-2.5A | 3 | |
| Forward Transconductance | gfs | 2.4 | S | VDS=-10V,ID=-1.7V | 3 | ||
| Diode Forward Voltage | VSD | -0.8 | -1.2 | V | IS=-1.25A,VGS=0V | 3 |
CAD (KiCad official)
- Symbol:
ST3421SRG - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
st3421srg-etched.step/st3421srg-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);st3421srg.step/st3421srg.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STANSON Tech datasheet (6 pp, sha256
66bb654dd810f77f, retrieved 2026-10-09, 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).