component
RS431AXSF3-Q1
Public Unreviewedby Ray
Jiangsu RUNIC Tech Voltage Reference, SOT-23. Datasheet-verified pinout, 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
markdownRS431AXSF3-Q1
Jiangsu RUNIC Tech · Voltage Reference · SOT-23
RS431AXSF3-Q1 from Jiangsu RUNIC Tech, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CATHODE | passive | Cathode (K). Shunt current / voltage input terminal - sinks the regulated current (0.5 mA to 100 mA) from the load resistor when the reference threshold is exceeded. Withstands up to 36 V relative to Anode. |
| 2 | REF | input | Reference input (R). High-impedance control input compared against the internal 2.5 V bandgap reference relative to the common Anode; a resistor divider from Cathode to Anode sets the programmed output voltage. |
| 3 | ANODE | power_in | Anode (A). Common return pin, normally connected to circuit ground / low side. Reference and cathode voltages are measured relative to this pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC Tech |
| Package | SOT-23 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
Same part, different packaging or reel option.
RS431AYSF3RS431AYSF3-CRS431BYSF3
CAD (KiCad official)
- Symbol:
RS431AXSF3-Q1 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Jiangsu RUNIC Tech datasheet (13 pp, sha256
880dac6431e2c101, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).