What it is
The Molex 1720420306 is the 3-circuit member of the Super Sabre 172042 series — a single-row male-blade power header designed for through-hole PCB termination. The 0.295 in (7.50 mm) pitch and 3-position count define the board footprint; the locking ramp on the housing drives positive retention when mated with the matching Super Sabre receptacle. A board-lock feature on the header body anchors it to the PCB during assembly and vibration — no secondary screw or clip needed.
Power ratings — what they mean
Rated 30 A per contact at 600 V — that 30 A figure is per-circuit, which matters for a 3-position header because you can run three independent 30 A paths simultaneously rather than dividing a single bus rating across all three. The voltage ceiling of 600 V covers the vast majority of industrial three-phase and DC-bus inputs without requiring a de-rated selection. The contact material is copper throughout, not a clad base, so the current path has no plated-over-NiFe spring layer to limit thermal creep at sustained high current. Silver plating at 100 µin (2.54 µm) — that is roughly three to five times the thickness of standard tin plating on commodity power headers. Silver does not oxide-film the way tin does under high-current make-and-break cycling, which means the contact resistance at the interface stays lower across the connector's mechanical life. For a 30 A power circuit the plating grade is the primary durability indicator; the 100 µin thickness here is the reason Super Sabre carries that rating rather than a de-rated figure.
Finger-proof and locking ramp — the safety and retention angle
The finger-proof housing shroud covers the live blade tips when the header is unmated, meeting the shock-hazard exclusion required in many industrial panel interconnects. The locking ramp is a housing-integral latch that snaps over the receptacle shoulder on full insertion — it does not require a tool to actuate, but it holds more firmly than a friction-fit header and resists pull-out under cable drag or vibration in the field. The board-lock feature on the header body bites into the PCB material during wave or reflow soldering to resist peel stress on the solder joints, which is the primary failure mode for high-current headers under thermal cycling.
Thermal and material notes
The insulation body is glass-filled liquid crystal polymer rated for -40°C to 125°C operating temperature — the upper limit of 125°C covers most motor-drive and power-conversion environments where the header sits adjacent to a heat sink or bus bar. LCP does not absorb moisture to any practical degree, so the connector is safe for un-covered industrial floor environments without a dry-pack requirement before assembly. Black housing colour is listed on the spec — worth noting if you are colour-matching a panel face or a wire-harness keying scheme, since the Super Sabre series uses colour as a secondary keying indicator across different position counts.