The KF128V 5.08mm Pitch 2-Pin Terminal Block (High Quality) PCB Mount is a precision-engineered, vertical-entry screw-clamp terminal block designed for secure, high-integrity wire-to-board connections on printed circuit boards. Featuring standard 5.08mm (0.2-inch) pin spacing, it utilizes top-entry screw clamping with a vertical (180°) wire insertion path, making it ideal for compact PCB layouts where horizontal wire entry is obstructed by neighboring components, heat sinks, or chassis walls. Constructed with a heavy-duty phosphor bronze / brass rising clamp mechanism, corrosion-resistant tinned solder pins, and a high-grade flame-retardant polyamide (PA66) housing with interlocking dovetail rails, this high-quality connector ensures low contact resistance, high vibration immunity, and reliable high-current power handling for industrial control systems, power supplies, and automation hardware.

Specifications

• Connector Series / Model: KF128V (Vertical Wire Entry Type)
• Quality Grade: High Quality (Reinforced cage clamp mechanism & premium PA66 housing)
• Pin Pitch / Terminal Spacing: 5.08 mm (0.20 Inches)
• Number of Poles / Positions: 2 Pins (2-Way / 2-Pole)
• Wire Entry Orientation: Vertical (180° Top-Entry relative to PCB surface)
• Rated Operating Voltage: 300 V AC / DC
• Rated Current Capacity: 15 A to 20 A Max.
• Dielectric Withstanding Voltage: 2000 V AC for 1 minute
• Insulation Resistance: ≥ 5000 MΩ (at 500 V DC)
• Contact Resistance: ≤ 15 mΩ (Low-resistance, high-conductivity terminal interface)
• Compatible Wire Gauge: 24 AWG to 12 AWG (0.5 mm² to 2.5 mm² solid or stranded wire)
• Wire Strip Length: 6.0 mm to 7.0 mm
• Screw Fastener Type: M2.5 Metric Slotted / Phillips Precision Steel Screws (Zinc-plated / nickel-plated)
• Tightening Torque: Approx. 0.5 N·m (4.4 lbf·in)
• Internal Clamp / Cage Material: High-Tensile Brass / Phosphor Bronze (High-retention rising clamp)
• Solder Pin Terminal Material: Tinned High-Conductivity Copper Alloy
• Solder Pin Dimensions: Approx. 0.8 mm × 1.0 mm (Recommended PCB drill hole: 1.3 mm to 1.5 mm)
• Insulating Body Material: Polyamide 66 (PA66, UL 94V-0 Flame Retardant, Industrial Green)
• Modular Assembly: Side Interlocking Dovetail Grooves (Expandable into multi-pin configurations)
• Operating Ambient Temperature: -40°C to +105°C
• Overall Dimensions: Approx. 10.16 mm × 10.0 mm × 14.0 mm (L × W × H excluding solder pins)
• Net Weight: Approx. 3.0 g to 4.2 g per piece

Features

• Vertical Top-Entry Architecture: Facilitates straight vertical wire drops into tight PCB enclosures where horizontal side-entry cabling is obstructed by heat sinks, relays, or chassis walls.
• Reinforced Rising Clamp Mechanism: High-quality internal clamp cage grips conductors evenly across their surface area without chewing or severing delicate fine-wire strands during tightening.
• Modular Dovetail Interlock Design: Molded side tongue-and-groove rails allow users to snap multiple 2-pin or 3-pin blocks together into 4-pin, 6-pin, 8-pin, or custom length arrays with uniform 5.08mm pitch alignment.
• Premium Flame-Retardant PA66 Body: Engineered with high-grade UL 94V-0 polyamide that resists high-temperature soldering reflow, physical cracking, and electrical arcing under continuous industrial operation.
• Corrosion-Resistant Tinned Terminals: Heavy tin plating on the copper alloy solder pins ensures immediate solder wetting, low contact resistance, and long-term joint integrity free of oxidation.

Common Applications

• Power Supply Input & Output: Connecting main 12V, 24V, or 48V DC input rails and high-current ground returns on industrial power boards and switching supplies.
• DC Motor & Stepper Drivers: Terminating high-current power stages, H-bridge driver outputs, and inductive solenoid coils on CNC and 3D printer controller boards.
• Relay & Solid-State Switching Modules: Interfacing mains AC line and neutral wiring to electromechanical relays, contactors, and automation control modules.
• Renewable Energy Systems: Connecting battery bank leads, solar PV charge controller circuits, and off-grid inverter distribution terminals.
• Industrial Automation & PLC Boards: Robust field-wiring junction points for power busses, auxiliary outputs, and emergency stop signal lines.

Usage Tips

• Proper Screw Torquing:
  • Tighten the M2.5 clamping screws to a recommended torque of 0.4 N·m to 0.5 N·m.
  • While this high-quality variant features a reinforced metal cage, avoid excessive over-tightening with oversized screwdrivers to prevent stripping the screw threads or cracking the PCB copper pad beneath.
• Wire Stripping & Ferrule Recommendations:
  • Strip wire insulation cleanly to 6.0 mm to 7.0 mm. Ensuring proper strip length prevents the screw clamp from clamping down onto the plastic insulation.
  • When using stranded flexible wire, crimp a suitable bootlace ferrule over the wire end or twist and lightly tin the conductor to eliminate stray whiskers that could bridge across the 5.08mm pitch.
• PCB Hole & Pad Sizing:
  • Drill PCB through-holes to 1.3 mm to 1.5 mm in diameter with broad copper annular rings.
  • Generous solder pad copper provides essential mechanical anchoring to resist the rotational leverage applied when tightening terminal screws during field wiring.
• Soldering Iron Temperature: Solder pins at 330°C to 350°C for approximately 2 to 3 seconds per pin using quality rosin-core solder. Ensure full solder fillet wetting around the pin on both top and bottom PCB layers.
• Modular Expansion Sequence: If sliding multiple blocks together using the interlocking side dovetails, interlock them into the desired array before inserting and soldering the pins into the circuit board to guarantee perfect hole alignment and prevent mechanical strain on the solder joints.