2.54mm PCB Screw Terminal Block — 0.1" Pitch KF128 Mini Wire Connector

2.54mm PCB Screw Terminal Block — KF128 Mini 0.1" Pitch Wire Connectors for Compact PCB Wiring

The 2.54mm (0.1") pitch PCB screw terminal block (KF128 series) is the smallest standard screw terminal block available, designed specifically for breadboard-pitch PCBs, compact control boards, Arduino shields, and space-constrained industrial electronics where larger 3.5mm or 5.08mm terminal blocks would not fit. At exactly 2.54mm pitch — matching standard 0.1" breadboard and DIP IC spacing — these terminal blocks integrate seamlessly into existing PCB layouts without requiring a dedicated footprint redesign.

Key Technical Specifications

  • Pitch: 2.54mm (0.1")
  • Model: KF128-2.54 (equivalent to Phoenix Contact MKDS 1.5/N-2.54)
  • Rated voltage: 150V (UL) / 130V (IEC)
  • Rated current: 6A (UL) / 8A (IEC)
  • Wire range: 26–18AWG (0.14–1.0mm²)
  • Contact material: Tin-plated copper alloy
  • Insulator material: PA66 (UL94V-0)
  • Mounting: Through-hole PCB, spliceable (side-by-side stackable)
  • Pin count: 2P, 3P, 4P, 5P, 6P, 7P, 8P, 9P, 10P, 12P, 14P, 16P
  • Certifications: CE, RoHS

Complete Product Range in This Collection

This collection covers the full KF128-2.54mm terminal block range: individual terminal blocks (2P through 16P, sold in packs of 10 or 100), spliceable modular units (2P and 3P blocks that snap together side-by-side to form any pin count), and assortment kits (multiple pin counts in a single package for prototyping and repair). All are through-hole PCB mount with standard 2.54mm pitch footprint.

Ideal Applications

  • Arduino and Raspberry Pi shields — breadboard-pitch terminal blocks for sensor and actuator wiring
  • Compact industrial control boards and PLC I/O modules
  • LED driver and lighting control PCBs requiring field-wireable connections
  • Home automation and IoT device PCBs (power, signal, and sensor wiring)
  • Educational electronics kits and prototyping boards
  • Small power supply and battery management system wiring terminals
  • Alarm, security, and access control system PCB connections

KF128 2.54mm Terminal Block Buying Guide

Step 1 — Confirm pitch: KF128-2.54mm terminal blocks have a 2.54mm (0.1") pitch — the same as standard DIP IC sockets and breadboards. This is the smallest standard screw terminal pitch. If your PCB has a larger footprint, consider our 3.5mm, 3.81mm, 5.08mm, or 7.62mm terminal block collections.

Step 2 — Wire gauge: KF128-2.54mm accepts 26–18AWG wire (0.14–1.0mm²). For heavier gauge wire (16AWG or larger), use a larger pitch terminal block (5.08mm or 7.62mm) with higher current ratings.

Step 3 — Spliceable vs fixed: Spliceable (modular) terminal blocks can be snapped together side-by-side to create any pin count from 2P upward. Fixed-count blocks (e.g., 4P, 6P, 8P) are more compact but cannot be extended. Choose spliceable for flexible prototyping; choose fixed for production.

Step 4 — Current rating: At 6A/150V (UL rating), KF128-2.54mm is suitable for low-power signal and control wiring. For mains voltage or high-current applications, use 5.08mm or 7.62mm pitch terminal blocks with higher voltage and current ratings.

Why Choose Yoeruyo for 2.54mm Terminal Blocks?

Yoeruyo stocks the complete KF128-2.54mm range — from 2P to 16P, individual and spliceable — all CE and RoHS certified. Our terminal blocks are manufactured to KF128 / Phoenix Contact MKDS 1.5 dimensional standards, ensuring PCB footprint compatibility with standard EDA library footprints (KiCad, Eagle, Altium). Available in packs of 10 for prototyping and 100pcs for production.

Frequently Asked Questions

Q: What is the KF128 terminal block equivalent to?
A: KF128-2.54mm is dimensionally equivalent to Phoenix Contact MKDS 1.5/N-2.54, Wago 256 series (2.54mm pitch), and similar mini screw terminal blocks from other manufacturers. PCB footprints are interchangeable.

Q: Can I use 2.54mm terminal blocks for mains voltage (110V/220V)?
A: No. KF128-2.54mm is rated 150V UL / 130V IEC. It is not suitable for direct mains voltage connections. For mains wiring, use 5.08mm or 7.62mm pitch terminal blocks rated 300V or higher.

Q: What screwdriver is needed for KF128 terminal blocks?
A: A flat-blade (slotted) screwdriver with a 2.0–2.5mm blade width is required. A precision screwdriver set is recommended for the small screw size.

Q: Are spliceable 2.54mm terminal blocks compatible with fixed-count blocks?
A: Yes. Spliceable KF128-2.54mm blocks from the same series can be combined with fixed-count blocks of the same pitch. Ensure all blocks are from the same series for proper side-by-side mating.

Q: What is the difference between KF128-2.54mm and KF128-3.5mm?
A: KF128-2.54mm has a 2.54mm pitch and is rated 150V/6A for 26–18AWG wire. KF128-3.5mm has a 3.5mm pitch and is rated 300V/10A for 24–12AWG wire, supporting heavier gauge wire and higher voltages. Choose 2.54mm for compact, low-power PCBs; choose 3.5mm or larger for industrial and higher-power applications.
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