What it is
The Beau 386907803 is a 3-circuit, single-row barrier block from the Beau 38690 series — a 3-wall tri-barrier strip rated 20 A per circuit at 300 V with a 0.325" (8.26 mm) pitch between centres. The housing is black PBT, and the top termination uses screws with captive back-plates; the bottom terminates in PC pins for through-hole board mounting. Accepts 12-22 AWG conductors — the zinc-plated steel screw and captive plate combination means the wire is captured under the plate face before the screw seats, so it won't push out when you torque down on the adjacent position. The 3-wall tri-barrier geometry puts two insulating walls between adjacent terminations, which is the construction that gives this style its finger-safe rating in industrial panel wiring — relevant for motor-control cubicles, power distribution blocks, and any application where a service technician works near an energized bus bar.
Fit check
Pitch at 0.325" (8.26 mm) is the dimension that governs hole-pattern and routing density on the PCB — it is narrower than the 0.394" (10.00 mm) and 0.591" (15.00 mm) pitch options in the unrelated Eurostyle 39100 series, so a panel cutout or mounting boss sized for a Eurostyle part will not accept the 386907803 without reworking the hole pattern. The 3-position circuit count matches the listed wire-entry count — three individual termination points on a single row, which is the intended configuration for this base product number.