This 5.08mm pitch 3-pin pluggable screw terminal block is a heavy-duty, two-piece electrical connector set designed for secure, detachable wire-to-board connections on printed circuit boards (PCBs). The system consists of a straight, vertical male header block soldered directly to the board, and a mating female plug piece outfitted with secure rising-cage screw terminals. This pluggable design enables swift field maintenance, easy upgrades, and rapid hardware hot-swaps without requiring desoldering irons or wire re-stripping.

Specification

• Pitch (Pin Spacing): 5.08mm (approx 0.2 inches)
• Pin / Way Count: 3-Pin / 3-Way
• Orientation: Straight / Vertical (90°C relative to the PCB surface)
• Voltage Rating: Up to 300V AC/DC
• Current Capacity: 10A to 15A continuous (depending on wire gauge)
• Wire Stripping Gauge Range: 12 AWG to 24 AWG (Accepts solid or stranded wires)
• Screw Mechanism: M2.5 or M3 steel screws with zinc plating (utilizes a rising-clamp box system)
• Insulation Material: High-temperature Polyamide (PA66), UL94V-0 rated flame retardant
• Contact Flanges: Tin-plated phosphor bronze pins for low surface resistance
• Color: Industry Standard Green

Features

• Two-Piece Pluggable Architecture: The male header is permanently anchored to the PCB, while the female wire housing features a smooth disconnect track. This allows technicians to disconnect full multi-wire wiring harnesses in a single motion during system servicing.
• Robust Rising Cage Clamp Mechanism: Rather than pushing a spinning screw directly into wire copper strands—which can sever or fray the conductor—the screw pulls an internal metal elevator clamp upwards. This clamps the wire uniformly over a wide surface area, preventing damage to thin, stranded wiring.
• Interlocking Modular Side Walls: The connector housings are molded with side slots and tabs, enabling individual blocks to be slid and snapped together to cleanly form custom continuous configurations (e.g., combining a 2-pin and a 3-pin block to create a 5-pin terminal array).
• Industry Standard 5.08mm Grid Alignment: The 5.08mm spacing perfectly matches standard prototype breadboards, stripboards, and electronic CAD layout footprints, allowing trouble-free drop-in integration on new board spins.

Common Applications

• Industrial Automation & PLC Modules: Routing DC input power lines, Modbus/RS485 communication pairs, and multi-channel sensor signals to control modules.
• Power Supply Outputs & Converters: Serving as high-current attachment ports on custom buck/boost converters, transformer break-out boards, and distribution bars.
• DIY Robotics & Motor Controllers: Providing clean, robust connection points for high-current stepper motor windings, brushed DC motor lines, and main battery input leads.
• Smart Home Devices & HVAC Controllers: Interfacing main thermostat control wires, relay lines, and ambient sensor arrays inside distribution panel boxes.

Professional Usage & Integration Tips

• Use Bootlace Ferrules for Stranded Wires: While the rising cage system handles bare stranded wire safely, fine copper strands can occasionally splay outward during tight installation twists, risking a minor short-circuit to adjacent pins. Always crimp standard bootlace ferrules onto stranded wires before insertion to shield the conductor and ensure long-term mechanical reliability.
• Design Proper PCB Trace Widths: Do not limit your PCB layout paths to thin default trace widths if you plan to push the full 10A - 15A rating through the terminal block. Use thick copper pours (e.g., 2 oz/ft² copper weight) and widen your paths appropriately to manage thermal trace rise.
• Apply Appropriate Screw Torque: Tighten the terminal screws firmly but avoid excessive force. Over-torquing with an oversized flathead screwdriver can strip the internal brass threads or fracture the PA66 plastic header wall. Use a precision 2.5mm jeweler's screwdriver for optimal torque control.
• Provide Clearance for Structural Mating: When drafting your electronic enclosure layout, remember that the wire-entry plug extends outward beyond the header profile. Leave a clear gap of at least 15-20mm directly in front of the terminal block to allow fingers or tools to comfortably plug/unplug the terminal array and route exiting wires safely without harsh bending strains.