DG301AAA

The Vishay DG301AAA is a single-pole single-throw (SPST) CMOS analog switch from the DG301A family, supplied in a hermetic TO-100 metal can package for high-reliability signal routing. The device features low and stable on-resistance, break-before-make switching action, and TTL/CMOS-compatible logic inputs. Its design minimizes charge injection and off-state leakage, preserving signal fidelity across a wide analog voltage range typically supported by dual supplies up to ±18 V or a single supply up to 36 V. The metal can construction provides robust environmental isolation and efficient thermal dissipation, suiting it for precision analog paths where stable performance over temperature is critical.

Typical end-uses include military and aerospace data acquisition modules, avionics multiplexers, industrial process controllers, automated test equipment, and sample-and-hold circuits where a single normally-open switch channel is required. The TO-100 package remains valued in applications demanding proven hermeticity and long-term reliability, but procurement specialists should assess lifecycle status carefully — metal can switches occupy a shrinking niche and can face extended lead times or eventual obsolescence. For programs requiring full military qualification, the broader DG301A family includes variants with /883 processing; the AAA suffix denotes a commercial/industrial grade. Design and supply chain teams should verify continuity of supply and consider alternate packaging when planning extended production runs.