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TL431NSG-AE2-R

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UTC(Unisonic Tech) Voltage Reference, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)tl431nsg-ae2-rfactory-2.0.0extractor-text

Verified TL431NSG-AE2-R

by Ray · last 4 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

4 Nov 2026RayPublished by the parts factory: tier mfr, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: TL431NSG-AE2-R · SOT-23-3 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 6-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOT-23-3
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-4k339zme/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ tl431nsg-ae2-r.kicad_sym✓ tl431nsg-ae2-r.kicad_mod✓ tl431nsg-ae2-r.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 2d ago
viewers tl431nsg-ae2-r: viewers · Ray 2d ago
package.json Publish 0.1.0 · Ray 2d ago
page.json Set visibility: public · Ray 2d ago
README.md Publish 0.1.0 · Ray 2d ago
tl431nsg-ae2-r-etched.glb Publish 0.1.0 · Ray 2d ago
tl431nsg-ae2-r-etched.step tl431nsg-ae2-r: factory component page (tier=mfr) · Ray 2d ago
tl431nsg-ae2-r-hero.glb tl431nsg-ae2-r: hero GLB from the etched model (keeps the MPN mark) · Ray 2d ago
tl431nsg-ae2-r-hero.overlay.json Publish 0.1.0 · Ray 2d ago
tl431nsg-ae2-r.glb Publish 0.1.0 · Ray 2d ago
tl431nsg-ae2-r.kicad_mod Publish 0.1.0 · Ray 2d ago
tl431nsg-ae2-r.kicad_sym Publish 0.1.0 · Ray 2d ago
tl431nsg-ae2-r.lbr Publish 0.1.0 · Ray 2d ago
tl431nsg-ae2-r.step Publish 0.1.0 · Ray 2d ago
verification.json Verified: Published by the parts factory: tier mfr, 3 pins · Ray 2d ago

TL431NSG-AE2-R

UTC(Unisonic Tech) · Voltage Reference · SOT-23-3

TL431NSG-AE2-R from UTC(Unisonic Tech), in a SOT-23-3. 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 K output Cathode is the shunt regulator output; the datasheet gives a recommended cathode voltage of VREF to 36 V (37 V absolute maximum) and a recommended cathode current of 1 to 100 mA.
2 R input Reference input sets the output voltage through the external divider, with VREF approximately 2.5 V, and the reference input current is limited to -0.05 to +10 mA absolute maximum.
3 A passive Anode is the common terminal of the device, identified only by the pin code A in the ordering table, and the datasheet gives no separate voltage or current limit for this pin.

Key specifications

Parameter Value
Manufacturer UTC(Unisonic Tech)
Package SOT-23-3
Category Power Management (PMIC)
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
Cathode Current IKA 1 100 mA 3
Cathode Voltage VKA 36 V 3
Cathode Voltage VKA 37 V 3
Cathode Current Range (Continuous) IKA -100 150 mA Continuous 3
Reference Input Current Range IREF -0.05 10 mA 3
Power Dissipation PD 300 mW SOT-23/SOT-23-3, TSOT-23/SOT-25 3
Operating Junction Temperature TJ 150 °C 3
Operating Ambient Temperature TOPR -40 125 °C Note 2: guaranteed by design, not 100% tested 3
Storage Temperature TSTG -65 150 °C 3
Deviation of Reference Input Voltage Over Temperature ΔVREF 4.5 17 mV VKA=VREF, IKA=10mA, 0°C ≤ TA ≤ 70°C 3
Ratio of Change in Reference Input Voltage to Change in Cathode Voltage ΔVREF/ΔVKA -1 -2.7 mV/V VKA=10V~VREF 3
Ratio of Change in Reference Input Voltage to Change in Cathode Voltage ΔVREF/ΔVKA -0.5 -2 mV/V VKA=36V~10V, IKA=10mA 3
Reference Input Current IREF 1.5 4 µA IKA=10mA, R1=10kΩ, R2=∞ 3
Deviation of Reference Input Current Over Full Temperature Range ΔIREF 0.4 1.2 µA IKA=10mA, R1=10kΩ, R2=∞, TA=full temperature range 3
Minimum Cathode Current for Regulation IKA(MIN) 0.3 0.5 mA VKA=VREF 3
Off-State Cathode Current IKA(OFF) 0.05 1 µA VKA=36V, VREF=0 3
Dynamic Impedance ZKA 0.15 0.5 Ω VKA=VREF, IKA=1~100mA, f≤1.0kHz 3
Equivalent full-range temperature coefficient 50 ppm/°C Over full rated operating temperature range 1

CAD (KiCad official)

  • Symbol: TL431NSG-AE2-R
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3 (KiCad packages3D, STEP)
  • 3D model files: tl431nsg-ae2-r-etched.step / tl431nsg-ae2-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431nsg-ae2-r.step / tl431nsg-ae2-r.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: UTC(Unisonic Tech) datasheet (6 pp, sha256 d50d965719771e68, retrieved 2026-11-04, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF