What it is and where it sits in the series
The Molex 393900102 is the 2-circuit member of the Eurostyle 39390 series — a side-entry, through-hole PCB terminal block built around a 0.375 in (9.53 mm) pitch with screw termination. At 30 A per circuit and 600 V, it sits at the lower-current end of the Eurostyle range, sized for 10–30 AWG wire in industrial control, power supply, and automation panels where a compact two-pole bridge or feed-through is needed. The black polyamide housing carries a 110 °C operating limit; the clamp and screw are nickel-plated copper, and the contact itself is tin-plated copper — a finish suited to the mating cycles typical of field wiring rather than high-cycle dynamic mating.
What the ratings mean for your fit
The 0.375 in pitch defines the PCB footprint and the routing channel between adjacent blocks on the board — check your layout for keep-out clearance before committing. The 30 A per circuit rating is a single-circuit figure; with both positions carrying full load the block handles a 2-pole power feed without derating at normal panel ambient. The 600 V rating gives headroom over typical industrial mains and control bus voltages, so voltage is not the constraint here. The nickel-plated clamp and screw resist corrosion from the wire and from panel atmosphere, extending the clamp's grip integrity over the life of the installation. Operating temperature of 110 °C is adequate for enclosed panels without active cooling, but in a cabinet that runs hot, treat 110 °C as the ceiling, not the working point — derate current accordingly if ambient inside the enclosure approaches the rating.
Lifecycle and compliance
Listed Active with ROHS3 Compliant status — the production status carries no flags that would block a standard BOM entry. No official successor or cross-reference is listed for this specific order code, so the sourcing path is straightforward against the listed MPN. Confirm the 2-position count, the 0.375 in pitch, and the through-hole orientation against your board layout before placing — the Eurostyle 39390 series also offers other position counts in the same pitch, but this specific code is the 2-pole member.