6.35mm PCB Screw Terminal Block — 0.25" Pitch 300V Industrial Wire Connector
6.35mm (0.25") PCB Screw Terminal Blocks — North American Standard Pitch for Industrial Power Wiring
The 6.35mm (0.25") pitch PCB screw terminal block is the North American standard industrial terminal block pitch, widely used in US and Canadian-designed industrial control panels, power distribution boards, and automation equipment. Positioned between the 5.08mm and 7.62mm pitches, 6.35mm provides a practical balance of compact footprint and adequate creepage distance for 300V industrial applications. It is the standard pitch for many legacy North American industrial equipment designs and remains widely specified in UL-listed control panel assemblies.
Key Technical Specifications
- Pitch: 6.35mm (0.25" / 1/4")
- Rated voltage: 300V
- Wire range: 22–12AWG (0.5–2.5mm²)
- Contact material: Tin-plated copper alloy
- Insulator material: PA66 (UL94V-0)
- Mounting: Through-hole PCB, spliceable
- Certifications: CE, RoHS
Ideal Applications
- North American industrial control panel PCB wiring
- UL-listed automation equipment terminal connections
- Power distribution boards for 120VAC/240VAC North American systems
- Legacy industrial equipment repair and replacement terminals
- HVAC and building automation controller I/O wiring
- Industrial sensor and actuator wiring in North American installations
Why Choose Yoeruyo for 6.35mm Terminal Blocks?
Yoeruyo stocks 6.35mm pitch terminal blocks in spliceable 2P and 3P units, CE and RoHS certified. This pitch is less commonly stocked by general distributors — Yoeruyo maintains consistent inventory for both prototyping quantities and production runs. Available in packs of 50pcs and 100pcs.
Frequently Asked Questions
Q: Is 6.35mm the same as 1/4" pitch?
A: Yes. 6.35mm = 0.25" = 1/4". This is the standard fractional-inch pitch used in North American industrial terminal block designs.
Q: Can 6.35mm terminal blocks be substituted with 5.08mm or 7.62mm?
A: No. Each pitch has a different PCB footprint and they are not interchangeable. Always verify your PCB footprint before ordering.
Q: What screwdriver is needed?
A: A flat-blade screwdriver with a 3.0–3.5mm blade width is recommended.