Dell 450-17384 is a 90 W AC adapter for supplying external power to a Dell laptop. Its 19.5 V output and Dell part number help identify the adapter when choosing a replacement or spare for a setup that uses these specifications.
The laptop-side connection is a 3-pin, 7.4 mm plug, so it matches systems that use this connector configuration. The listed output current is 4.62 A, alongside the 90 W rating and 19.5 V output.
The listing specifies a C6 power cord. This adapter can serve as a spare or replace an adapter with the same electrical output and connector configuration, providing power through the matching laptop connection.