What this terminal block is
The Molex 399100302 is a 2-position, single-level Eurostyle 39910 screw-clamp PCB terminal block with a 10.16 mm pitch, rated 40 A per circuit at 600 V. The rising cage clamp accepts wire from 8 to 18 AWG without fraying the conductor — the cage lifts as the screw tightens, drawing the wire down against the plated contact. M4 screws torque to 1.36 Nm and carry tin-plated steel heads; the clamp itself is brass with nickel plating and the spring contact is tin-plated copper.
Ratings that decide the fit
Rated 40 A at 600 V with an 8-18 AWG wire range — the gauge choice determines the actual circuit capacity, so match downstream wire and fusing to the application rating. Tin plating on the contact surfaces is standard for power terminal blocks — it gives solid first-mate resistance but the plating wears under repeated cycling, so for field-service re-connections plan the torque procedure carefully. The -40°C to 130°C operating window covers both cold-store and industrial high-ambient environments — the 130°C rating is governed by the thermoplastic housing, not the contact.