Choosing PCB Terminal Blocks
Terminal blocks provide field-wireable connections between external cables and circuit boards. Choosing the right termination technology impacts assembly labor and field reliability.
1. Screw Clamp vs Push-In Spring Terminals
Push-in spring cage blocks have become the dominant choice in modern industrial automation. They require no torque screwdriver adjustments and resist vibration-induced loosening far better than traditional screw terminals.
2. Through-Hole Reflow (THR) vs Pure SMT
Because terminal blocks experience significant mechanical pull forces when technicians tighten wires, Through-Hole (THT) or Pin-in-Paste (THR) mounting provides superior mechanical shear strength compared to surface-mount pads.