What this 7-circuit right-angle header does for your board
The 1723103307: This is a Molex Ultra-Fit 172310 header, 7 positions loaded, single row, on a 3.50mm pitch. It's a shrouded 4-wall header with a latch holder. Voltage rating is 600VAC/DC; current rating is wire-gauge dependent, so check the derating for your chosen AWG.
The 172310 series is Molex's wire-to-board power interconnect line, 3.50mm pitch, rated up to 600V. This 7-circuit single-row right-angle header is one of the lower-position-count members — useful where you need a compact power or signal tap without the bulk of a dual-row or higher-count header. Compared to a 10-circuit sibling in the same series, this 7-position part uses the same pitch and contact system, so the mating receptacle and terminals are shared — only the cavity count changes.
This header mates with the Ultra-Fit receptacle housing (separate order code) and uses the Ultra-Fit crimp terminals — male pins are already in the header.