The electronic component is convenient to ship overseas because it is packed in a 16-SOIC (0.154, 3.90mm Width). This analog switch is mounted in Surface Mount. Suppliers offer 16-SOIC packages. 4000B is a series number.
CD4051BME4 Features
CD4051BME4 Applications
There are a lot of Rochester Electronics, LLC CD4051BME4 Analog Switches & Multiplexers ICs applications.