Screw Terminals

Select screw terminals based on conductor size and wire type (solid, stranded, or ferruled), current and voltage ratings, mounting style (PCB, panel, or inline), and required pitch or spacing to fit your enclosure or board layout

Check the maximum current (amperes), voltage rating, and insulation material temperature rating; also confirm conductor gauge compatibility (AWG/mm²) and whether the terminal is rated for AC, DC, or both

For PCB terminals, verify pin layout, pitch, number of positions, and whether you need through-hole or surface-mount; also ensure the terminal's height and footprint clear nearby components and enclosure openings

Periodically inspect for corrosion, loose screws, or damaged insulation; tighten screws to the manufacturer's torque specification, clean contacts if corroded, and replace terminals that show wear or cracking

Look for UL, CSA, or IEC safety approvals, appropriate insulation ratings, and design features like captive screws or protective barriers that prevent accidental shorting and meet your application's safety standards

Yes—ferrules improve connection reliability for stranded wire by preventing stray strands and reducing compression; ensure the ferrule size matches the terminal's conductor range and that the terminal accepts ferrules

Prices vary by brand, material, and specialty features; basic terminal blocks are commonly available in budget options under $50 while industrial or specialized assemblies can be higher, with average category prices often around the mid-range