The HR30 is a push-pull latched circular connector designed to meet IP67, enabling it to withstand submersion for up to half-an-hour when mated. This miniature circular connector has an outside diameter of 12.6 mm, housing six contacts in a lightweight plastic that is totally resistant to corrosion. Both the plug and receptacle use gold plated solder cup contacts, rated at 2 amps.
Mis-insertion can be avoided due to its five-key polarization system. The HR30 is also designed to withstand 1000 cycles. Behind the plug's collet-style strain relief is a 10 mm long gasket to seal the cable; these features are integrated when the shell is screwed into position onto the insulator, and it is achieved without special tools.