component

TL431L

Public Made by Adom

by adom

Slkor(SLKORMICRO Elec.) Voltage Reference, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)tl431lfactory-2.0.0extractor-text

Verified TL431L

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

Verification log 1 record

4 Nov 2026RayPublished by the parts factory: tier lcsc, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: TL431L · TO-92 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 7-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: TO-92_Inline
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-vuy9nenp/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
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ tl431l.kicad_sym✓ tl431l.kicad_mod✓ tl431l.step
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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 2d ago
viewers tl431l: 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
tl431l-etched.glb Publish 0.1.0 · Ray 2d ago
tl431l-etched.step tl431l: factory component page (tier=lcsc) · Ray 2d ago
tl431l-hero.glb tl431l: hero GLB from the etched model (keeps the MPN mark) · Ray 2d ago
tl431l-hero.overlay.json Publish 0.1.0 · Ray 2d ago
tl431l.glb Publish 0.1.0 · Ray 2d ago
tl431l.kicad_mod Publish 0.1.0 · Ray 2d ago
tl431l.kicad_sym Publish 0.1.0 · Ray 2d ago
tl431l.lbr Publish 0.1.0 · Ray 2d ago
tl431l.step Publish 0.1.0 · Ray 2d ago
verification.json Verified: Published by the parts factory: tier lcsc, 3 pins · Ray 2d ago

TL431L

Slkor(SLKORMICRO Elec.) · Voltage Reference · TO-92

TL431L from Slkor(SLKORMICRO Elec.), in a TO-92. 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 REFERENCE input Reference input of the adjustable shunt regulator; the datasheet gives a reference input voltage of 2.475 V min, 2.5 V typ and 2.525 V max at VKA=VREF, IKA=10 mA, and a reference input current range of 0.05 to 10 mA.
2 ANODE power_in Anode terminal of the shunt regulator, normally connected to ground, with a cathode current range of -100 to +150 mA continuous.
3 CATHODE passive Cathode terminal of the shunt regulator, with a maximum cathode voltage of 36 V and a cathode current range of -100 to +150 mA continuous.

Key specifications

Parameter Value
Manufacturer Slkor(SLKORMICRO Elec.)
Package TO-92
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 voltage VKA 36 V 2
Cathode current range (continuous) IKA -100 150 mA 2
Reference input current range Iref 0.05 10 mA 2
Operating junction temperature TJ -40 125 °C 2
Storage temperature range TSTG -65 150 °C 2
Reference input voltage Vref 2.4 2.5 2.5 V VKA=VREF, IKA=10mA 2
Deviation of reference input voltage over temperature ΔVref/ΔT 4.5 17 mV VKA=VREF, IKA=10mA 2
Ratio of change in reference input voltage to change in cathode voltage (VKA=10V to VREF) ΔVref/ΔVKA -1 -2.7 V/V ΔVKA=10V~VREF 2
Change in reference input voltage to change in cathode voltage (VKA=36V to 10V) ΔVref/ΔVKA -0.5 -2 V/V IKA=10mA, ΔVKA=36V~10V 2
Reference input current Iref 1.5 4 µA IKA=10mA, R1=10kΩ 2
Deviation of reference input current over full temperature range Δlref/ΔT 0.4 1.2 µA IKA=10mA, R1=10kΩ 2
Minimum cathode current for regulation IKA(min) 0.45 1 mA VKA=VREF 2
Off-state cathode current IKA(OFF) 0.05 1 µA VKA=36V, VREF=0 2
Dynamic impedance ZKA 0.15 0.5 Ω VKA=VREF, IKA=1 to 100mA, f≤1.0 kHz 2
Power dissipation (TO-92) PD 770 mW TO-92 column 2
Thermal resistance from junction to ambient (TO-92) RθJA 162 °C/W TO-92 column 2

CAD (KiCad official)

  • Symbol: TL431L
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: tl431l-etched.step / tl431l-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431l.step / tl431l.glb are the bare package body.

Provenance

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

  • Datasheet: Slkor(SLKORMICRO Elec.) datasheet (7 pp, sha256 2d18cd6ce2af8ab3, retrieved 2026-11-04, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (vision), consensus claude-opus-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