Model Number MPX4250A series (MPX4250A, MPXA4250A) This is an overview of the MPX4250A series (MPX4250A, MPXA4250A) and the OSS-ECAL offering for the MPX4250A series. The MPX4250A series is a pressure sensor IC (20 to 250 kPa) made by NXP Semiconductors. Model Number