Its output is set by two external resistors to any value between 2.495 V and 36 V, with a ±2.2% tolerance on the internal reference. Rated for 100 mA continuous cathode current and requiring only 1 mA to regulate, it suits both low-power bias circuits and higher-current shunt regulators in industrial and automotive environments spanning -40°C to 125°C.
Stock is limited to independent-distributor and surplus inventories.
Key ratings that decide the fit
The 2.495 V internal reference has a ±2.2% tolerance. 100 mA output current defines the maximum load the shunt can sink before the pass element saturates; for designs drawing more than that, a higher-current TL431 variant or an external boost transistor is needed. The SOT-23-5 footprint is compact but limits power dissipation — the 125°C junction maximum means the thermal resistance of the board layout sets the practical derating.