5.0mm 5.08mm PCB Screw Terminal Block — 300V 24A Industrial Power Connector

5.0mm & 5.08mm PCB Screw Terminal Blocks — 300V/24A Standard Industrial Power Wiring Connectors

The 5.0mm and 5.08mm pitch PCB screw terminal blocks are the most widely used industrial terminal block pitch worldwide, rated at 300V and up to 24A (IEC). This pitch is the global standard for power distribution boards, motor drive controllers, inverters, industrial automation panels, and mains-connected equipment where reliable, high-current field-wireable connections are essential. The 5.08mm pitch (0.2") aligns with standard 0.1" grid PCB layouts at every other hole, simplifying PCB design integration.

Key Technical Specifications

  • Pitch: 5.0mm and 5.08mm (0.2")
  • Rated voltage: 300V (UL) / 250V (IEC)
  • Rated current: 15A (UL) / 24A (IEC)
  • Wire range: 22–12AWG (0.5–2.5mm²)
  • Contact material: Tin-plated copper alloy
  • Insulator material: PA66 (UL94V-0)
  • Mounting: Through-hole PCB, spliceable
  • Pin count: 2P, 3P (spliceable to any count)
  • Certifications: CE, RoHS

Complete Product Range in This Collection

This collection includes: KF128-5.0mm terminal blocks (2P, 3P, spliceable), KF128-5.08mm terminal blocks (2P, 3P, spliceable), and multi-pitch assortment kits combining 5.08mm with 2.54mm, 3.81mm, and 7.62mm units. All are through-hole PCB mount with spliceable side-by-side stacking for flexible pin count configuration.

Ideal Applications

  • AC/DC power supply output terminals and mains input connections
  • Variable frequency drive (VFD) and servo motor driver control wiring
  • Solar inverter and grid-tie system PCB power terminals
  • Industrial automation panel I/O power distribution
  • Battery management system (BMS) cell balancing and protection wiring
  • EV charger and energy storage system PCB connections
  • HVAC controller and building management system power terminals
  • LED driver and lighting control board power connections

5.0mm vs 5.08mm — Which Pitch Should You Choose?

5.08mm pitch (0.2") is the IEC/European standard (equivalent to Phoenix Contact MKDS 2.5/N-5.08) and is the most common globally. 5.0mm pitch is used in some Asian and Chinese-designed equipment. Both accept the same wire gauge and have similar ratings, but are not interchangeable on the same PCB. Verify your PCB footprint with a caliper before ordering. When in doubt, 5.08mm is the safer choice for compatibility with international EDA library footprints.

PCB Screw Terminal Block Buying Guide

Step 1 — Confirm pitch: 5.0mm and 5.08mm are close but not interchangeable. Measure center-to-center screw spacing on your PCB with a caliper. Standard EDA libraries (KiCad, Eagle, Altium) use 5.08mm for Phoenix Contact-compatible footprints.

Step 2 — Wire gauge and current: 5.0mm/5.08mm terminal blocks accept 22–12AWG wire. At 24A IEC rating, they are suitable for single-phase 230VAC loads up to ~5kW and 24VDC loads up to ~576W per contact. For higher currents, use 7.62mm pitch blocks.

Step 3 — Spliceable configuration: Stack 2P and 3P modular units side-by-side to achieve any pin count. This is the most flexible approach for prototyping and small-batch production.

Step 4 — Mains voltage compliance: At 250V IEC rating, 5.08mm terminal blocks are suitable for 230VAC mains connections in IEC-compliant equipment. Always verify local electrical codes and safety standards before use in mains-connected applications.

Why Choose Yoeruyo for 5.0mm/5.08mm Terminal Blocks?

Yoeruyo stocks both 5.0mm and 5.08mm pitch terminal blocks in spliceable 2P and 3P units, CE and RoHS certified. Our 5.08mm blocks are dimensionally compatible with Phoenix Contact MKDS 2.5 series PCB footprints. Available in packs of 50pcs and 100pcs for production quantities.

Frequently Asked Questions

Q: Can 5.08mm terminal blocks be used for 230VAC mains wiring?
A: Yes, with a 250V IEC rating and 24A current rating, 5.08mm terminal blocks are suitable for 230VAC mains connections in properly designed, safety-certified equipment. Always comply with local electrical codes and use appropriate PCB creepage and clearance distances.

Q: What is the difference between 5.0mm and 5.08mm pitch?
A: 5.0mm is used in some Asian equipment designs; 5.08mm (0.2") is the IEC/international standard. They are not interchangeable on the same PCB. 5.08mm is recommended for new designs for maximum compatibility with international component libraries.

Q: What screwdriver is needed?
A: A flat-blade screwdriver with a 3.0–3.5mm blade width is recommended for 5.0mm/5.08mm terminal block screws.

Q: Are these compatible with Phoenix Contact MKDS 2.5 footprints?
A: Yes. KF128-5.08mm is dimensionally equivalent to Phoenix Contact MKDS 2.5/N-5.08. PCB footprints are interchangeable.
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