Barrier Terminal Blocks are used to hold cables securely on a circuit or power bus. They are typically PCB (printed circuit board) or Chassis mount and use screws to clamp the wires.
Barrier terminal block sizes are typically defined by their pitch spacing, which is the distance between the centers of adjacent poles or terminals. Common pitch sizes range from 2.54 mm 6.35mm ,7.62mm,8.25mm,8.5mm,10.0mm to 35 mm, with other sizes also available depending on the manufacturer and application
This is the most important point in determining the size of a barrier terminal block. Number of Poles: The number of terminals or connections in a single block.
Width and Height: These dimensions determine the overall physical size of the block.
Current and Voltage Ratings: These ratings are also important considerations when selecting a barrier terminal block, and they can influence the physical size as well.
Common Pitch Spacings: 2.54 mm: Often used for smaller, high-density applications. 3.5 mm, 3.81 mm, 5 mm: Common sizes for a variety of applications. 6.35 mm (1/4 inch), 7.62 mm (3/8 inch): Standard sizes. 9.5 mm, 10 mm, 11 mm, 12 mm and above: Larger pitch spacings are used for higher current applications
