What this part is
The Molex 389690004 is a 4-circuit single-row barrier block in the 38969 series, rated 50 A per circuit at 600 V with a through-hole PC-pin bottom termination and screw-top wire entry with captive plate. The housing is black polybutylene terephthalate (PBT) rated UL94 V-0, and operating range spans -40 °C to 120 °C.
What the ratings mean for the fit
At 50 A per circuit the 389690004 sits well above typical signal-level barrier blocks — this is a power-distribution terminal strip, not a low-current bus connector. The 600 V rating covers both AC and DC mains-level wiring in most industrial panels, and the nickel-plated steel terminal screw with captive plate keeps the conductor clamped under vibration without the plate walking free during service. Wire gauge 8–20 AWG covers the heavy end of panel wiring down to control-level conductors; the 3-wall tri-barrier construction provides the creepage distance needed at full voltage.