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TL431CTA

Public Made by Adom

by adom

HTC Korea TAEJIN Tech Voltage References, TO-92-2.54mm. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TL431CTA

HTC Korea TAEJIN Tech · Voltage References · TO-92-2.54mm

TL431CTA from HTC Korea TAEJIN Tech, in a TO-92-2.54mm. 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, which for TL431C is 2.483 V to 2.507 V at VKA = VREF and IK = 10 mA, with a reference input current of 1.8 uA typ. and 4.0 uA max.
2 Anode passive Common terminal of the shunt regulator that the cathode current returns to; the pin description table labels this pin Ground.
3 Cathode passive Cathode is the regulated shunt output, recommended to operate from VREF up to 40 V with a cathode current of 0.5 mA to 100 mA, and absolute maximum cathode voltage of 42 V.

Key specifications

Parameter Value
Manufacturer HTC Korea TAEJIN Tech
Package TO-92-2.54mm
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 VREF 2.483 2.495 2.507 V VKA=VREF, IK=10mA (TL431C column) 4
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 ΔVKA=10V-VREF, IK=10mA 4
Ratio of Change in Reference Input Voltage to Change in Cathode Voltage ΔVREF/ΔVKA -1 -2 mV/V ΔVKA=36V-10V, IK=10mA 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
Cathode Voltage VKA 42 V 1
Cathode Current Range (Continuous) IK -100 150 mA Continuous 1
Reference Input Current Range IREF -0.05 10 mA 1
Junction Temperature Range TJ -40 150 ℃ 1
Operating Temperature Range TOPR -40 125 ℃ Operating temperature range applies unless otherwise specified 1
Storage Temperature Range TSTG -65 150 ℃ 1
Cathode Voltage VKA 40 V Minimum printed as VREF (symbolic, not numeric) 2
Cathode Current IK 0.5 100 mA 2

CAD (KiCad official)

  • Symbol: TL431CTA
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92-2.54mm (KiCad packages3D, STEP)
  • 3D model files: tl431cta-etched.step / tl431cta-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431cta.step / tl431cta.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 0a0d5fc0a3221190, retrieved 2026-10-29, 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