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TL431C

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HTC Korea TAEJIN Tech Voltage References, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icstl431cfactory-2.0.0extractor-text

Verified TL431C

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: TL431C · TO-92 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 12-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-4_bxt_kn/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✓ tl431c.kicad_sym✓ tl431c.kicad_mod✓ tl431c.step
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Contents

README

markdown

TL431C

HTC Korea TAEJIN Tech · Voltage References · TO-92

TL431C from HTC Korea TAEJIN Tech, 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 voltage input; the TL431C reference is 2.495V typ. (2.483V to 2.507V min to max at IK=10mA, VKA=VREF).
2 Anode power_in Anode is the ground connection of the device, per the pin description table.
3 Cathode input Cathode is the input supply voltage pin, with cathode voltage up to 40V (absolute maximum VKA is 42V) and cathode current 100 to 150 mA continuous.

Key specifications

Parameter Value
Manufacturer HTC Korea TAEJIN Tech
Package TO-92
Category Power Management ICs
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
Reference Input Voltage (TL431C, 0.5%) VREF 2.483 2.495 2.507 V VKA = VREF, IK = 10mA 4
Cathode Voltage (absolute maximum) VKA 42 V 1
Cathode Current Range (continuous) IK -100 150 mA 1
Reference Input Current Range IREF -0.05 10 mA 1
Junction Temperature Range TJ -40 150 ℃ 1
Operating Temperature Range TOPR -40 125 ℃ 1
Storage Temperature Range TSTG -65 150 ℃ 1
Cathode Voltage (recommended) VKA 40 V minimum is VREF 2
Cathode Current (recommended) IK 0.5 100 mA 2
Deviation of Reference Input Voltage ΔVREF/ΔT 8 20 mV VKA = VREF, IK = 10mA, TA = Full Range 4
Ratio of Change in Reference Input Voltage to Change in Cathode Voltage ΔVREF/ΔVKA -1.4 -2.7 mV/V IK = 10mA, ΔVKA = 10V 4
Ratio of Change in Reference Input Voltage to Change in Cathode Voltage ΔVREF/ΔVKA -1 -2 mV/V IK = 10mA, ΔVKA = 36V-10V 4
Reference Input Current IREF 1.8 4 uA IKA = 10mA, R1 = 10kΩ, R2 = ∞ 4
Deviation of Reference Input Current ΔIREF/ΔT 0.4 1.2 uA IK = 10mA, R1 = 10kΩ, R2 = ∞, TA = Full Range 4
Minimum Cathode Current for Regulation IK(MIN) 0.5 mA VKA = VREF 4
Off-State Cathode Current IK(OFF) 0.17 0.9 uA VKA = 36V, VREF = 0 4
Dynamic Impedance ZKA 0.27 0.5 Ω VKA = VREF, IK = 1mA~100mA, f ≤ 1kHz 4
Equivalent Full Range Temperature Coefficient αVREF 50 PPM/℃ Equivalent full range (feature list) 1

CAD (KiCad official)

  • Symbol: TL431C
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: tl431c-etched.step / tl431c-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431c.step / tl431c.glb are the bare package body.

Provenance

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

  • Datasheet: HTC Korea TAEJIN Tech datasheet (12 pp, sha256 66b4ce853f1e463b, retrieved 2026-11-04, tier: lcsc)
  • 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