TL431K-1 Transistor TO92 UTC Voltage Reference 431 UTC(Unisonic Tech) TL431K-1

Product Overview:

A three-terminal adjustable shunt regulator integrated circuit housed in a plastic through-hole package, providing high thermal stability and accurate output voltage control for use as a voltage reference in switching power supplies, linear regulators, and digital voltmeters.

Core Specifications:

• Manufacturer: UTC (Unisonic Technologies Co., Ltd.)

• Package Type: TO-92 (Plastic Through-Hole, 3-pin)

• Function: Programmable Precision Shunt Regulator / Voltage Reference

• Input Channels: 1 Reference Input (Three-terminal device: Reference, Anode, Cathode)

• Control Interface: Voltage-controlled Reference Pin (Output adjustable between $V_{ref} \approx 2.5\text{V}$ and 36V via two external resistors)