Description
KF126-5.0-2P PCB Screw Terminal Block (2-Pin / 5.0mm Pitch)
Product Overview
The KF126-5.0-2P is a compact, single-row wire-to-board screw terminal block engineered for reliable power and signal distribution on printed circuit boards (PCBs). This 2-position component features a robust leaf-spring screw-clamp mechanism that provides excellent clamping force while protecting wires from direct screw damage.
With an industry-standard 5.0mm pin spacing, the KF126 series is widely favored by developers and manufacturers for its low profile and space-saving footprint. It is ideal for routing low-to-medium power lines, simple sensor links, and DC inputs directly into circuit architectures, making it a staple component for both commercial electronics and DIY hardware prototyping.
Key Features
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Protective Wire Guard Design: Built with internal leaf-spring brass contacts that compress uniformly against inserted wires, ensuring low contact resistance without tearing fine copper strands.
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Standard 5.0mm Pitch Profile: Features standard 5.0mm ($0.197\text{ inch}$) pin spacing, ensuring perfect drop-in compatibility with standard commercial PCB layouts and prototyping prototype boards.
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Interlocking Modular Housing: Designed with interlocking side rails, allowing multiple 2-pin or 3-pin KF126 units to slide and lock together cleanly to create custom-length terminal arrays.
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Rugged, Flame-Retardant Shell: Molded from premium thermoplastic material (UL 94V-0) to withstand high mechanical stress, thermal cycling, and soldering heat without warping.
Technical Specifications
| Parameter | Specification |
| Part Number / Model | KF126-5.0-2P |
| Component Type | Fixed PCB Screw Terminal Block |
| Number of Positions (Poles) | 2 Pins |
| Pitch (Pin Spacing) | 5.0mm ($0.197\text{ inch}$) |
| Orientation | $90^\circ$ Right Angle / Side Wire Entry (Vertical Screw Access) |
| Termination Style | PCB Through-Hole Solder Mount |
| Clamping Mechanism | Screw Clamp with Wire Guard (Leaf Spring) |
| Material (Housing) | PBT / Polyamide, Green (UL 94V-0 Flame Retardant) |
| Material (Contacts) | Phosphor Bronze or Brass, Tin-Plated |
| Screw Material | M2.5 Steel, Zinc-Plated |
| Rated Voltage | 250V – 300V AC/DC |
| Rated Current | 8A – 10A Max (Wire gauge dependent) |
| Wire Gauge Compatibility | 14 AWG to 22 AWG (Solid or Stranded) |
Applications
The ideal, economical connector solution for low-profile power delivery, compact enclosures, and peripheral connections:
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DC Power Input Rails: Serving as the primary power input port for low-voltage step-down modules, custom circuit board designs, and compact DIY electronic enclosures.
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2-Wire Sensor Interfaces: Providing a clean, stable termination node for peripheral devices like temperature sensors, limit switches, and simple digital transceivers.
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Microcontroller Prototyping Shields: Ideal for building clean power-delivery modules and basic breakout pins on custom Arduino shields, ESP32 test platforms, and development rigs.
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Small Actuator & Relay Blocks: Managing output connections for solitary 5V/12V relay coils, small cooling fans, and low-current DC peripheral components.

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