Adjustable shunt reference in a TO-92-3 package
The Texas Instruments LM431ACZ/LFT3 is a three-terminal adjustable shunt regulator that sets a 2.495 V reference between the cathode and anode, programmable to any output voltage up to 37 V with two external resistors. It delivers up to 100 mA of cathode current and sinks a minimum of 1 mA for regulation. The ±2.2% tolerance covers the commercial temperature range of 0°C to 70°C. The TO-92-3 through-hole package suits hand-assembly, prototyping, and retrofit work on existing PCBs.
Active lifecycle and ordering the right packaging variant
The LM431ACZ/LFT3 carries an Active lifecycle status and is ROHS3 compliant. The suffix denotes Tape & Box (TB) and Cut Tape (CT) packaging options — the TB variant ships in a box of loose parts on a tape carrier, while CT is a cut section of tape for small quantities. For a BOM line that needs through-hole placement, the TB box is the production pick; the CT cut tape is the prototype or rework choice. Both are the same die and same TO-92-3 package.