TL431BIDBZR

TL431BIDBZR is the tape-and-reel SOT-23-3 ordering code for the Texas Instruments TL431 shunt voltage reference, listed as ACTIVE. Read the B grade on its own rows: a reference voltage of 2.495 V typical with an initial tolerance of 0.5 % at 25 °C — 2.483 V to 2.507 V at VKA = VREF and IKA = 10 mA — an output adjustable from the reference voltage up to 36 V, a cathode current range of 1 mA to 100 mA and a reference-voltage deviation of 14 mV typical over the full temperature range for this grade. The selection point is precision per cent: at 25 °C the initial tolerance steps 0.5 % for this B grade, 1 % for the A grade and 2 % for the standard grade — the B grade is half the A grade’s tolerance and a quarter of the standard grade’s, which is what an isolated power supply’s feedback loop or a voltage monitor actually consumes. Selection advice: the A and standard grades share the footprint and the designation; the grade letter in the middle of the code is the tolerance you are buying, so do not let a same-footprint offer of a looser grade through as equivalent. Parameters verified against the TI TL431 datasheet (B-grade rows) and product page.