The LM4128BMF4.1/NOPB in a SOT235 package is a compact fixed voltage reference/regulator designed for space‑limited electronics. Supplied as three pieces, this device uses a lead NOPB construction and a small SOT235 footprint to simplify integration on compact boards and prototypes. Key benefits Space saving: SOT235 package enables compact layouts in handheld, wearables, and other small devices. Fixed output: delivers a precise 4.1 V reference/output suitable for reference or regulation needs in compact circuits. Lead reliability: NOPB packaging indicates no lead in the device, meeting RoHS/lead requirements. Ready to use: 3 pieces per provide convenient stocking for boards with repeat requirements. Broad compatibility: fits standard SOT235 footprints, easing replacement and design reuse. Key attributes Model: LM4128BMF4.1/NOPB Function: fixed voltage reference/regulator (as indicated by the part designation) Output voltage: 4.1 V Package type: SOT235 Packaging: NOPB (lead) Quantity: 3 pieces Applications and use cases ADC and sensor reference: use as a stable reference source for precision data converters in compact embedded systems. Portable power management: suitable as a fixed reference in small regulators within wearable devices and handheld electronics. Development and prototypes: convenient for evaluation boards, lab benches, and hobby projects requiring a fixed 4.1 V reference in a tiny footprint. Notes This description reflects the specifications implied by the model name LM4128BMF4.1/NOPB and the SOT235 package. For exact electrical characteristics, tolerance, temperature range, and pinout, refer to the manufacturer datasheet. Quantity and packaging are as stated: 3 pieces in the listed .