What it is
The 386307803 is a 3-circuit single-row barrier block in the Beau 38630 series, rated 25 A per circuit at 600 V with a 0.438-inch (11.12 mm) pitch between wire entries. The top termination uses screws with a captive plate that holds the wire in place as the screw is tightened, and the bottom termination is a PC pin designed for through-hole soldering into a PCB. The housing is black polybutylene terephthalate (PBT), a material chosen for its mechanical toughness and resistance to industrial chemicals and thermal cycling — the terminal screw hardware is steel with a zinc clear chromate finish.
What the ratings mean for selection
The 25 A per circuit rating at 600 V supports moderate industrial power distribution — the housing geometry addresses creepage and clearance requirements for both ratings simultaneously. Evaluate the two specifications together; they define the application envelope, not two independent ratings. The dual-wall (2-wall) barrier construction physically separates adjacent circuits with a solid insulating wall between each pair of live terminals. That dual-wall geometry is what makes the difference for applications where a failed wire or operator contact could bridge two adjacent circuits — the barrier prevents a single fault from becoming a short across two phases. Wire gauge range of 12–24 AWG is broad for a 25 A block. The 12 AWG lower limit means the connector handles heavy harness power feeds; the 24 AWG upper limit covers signal wiring run in the same enclosure. When terminating fine-gauge wire under the captive plate, torque matters — an under-tightened fine wire creeps under load and vibration. The 0.438-inch (11.12 mm) pitch determines the center-to-center spacing of each circuit and therefore the panel cutout or PCB hole pattern. Matching the pitch to the existing panel mounting is the first fit check before committing the BOM position.
Where this class is used
Barrier blocks of this type appear in industrial control panels, motor starter circuits, power distribution modules, and anywhere a factory harness needs a fixed, mechanically robust wire termination point that a technician can wire and re-wire without a specialized tool. The screw-and-captive-plate top is the workhorse of panel wiring — field-installable, field-serviceable, and visually inspectable.
Lifecycle and sourcing
The 386307803 carries an Active product status and is ROHS3 Compliant. No official successor order code appears on record. The part is quoted to order against BOM quantity — confirm your circuit count and panel pitch before committing.