PCB terminal block, 237 Series, with 10 mm pin spacing Our PCB terminal block (item number 237-146) ensures effortless electrical installations. It is ideal for custom installations with different mounting types. Conductors should only be connected to this PCB terminal block if their strip length is between 5 and 7 mm . Featuring one conductor terminal along with a screw connection, this connector is highly versatile. When properly tightened, screw-clamp connections ensure that wires are connected securely—both physically and electrically—as they make contact with a large section of wire. Depending on the conductor type, this PCB terminal block is designed for conductor cross sections ranging from 0.5 mm² to 2.5 mm². Tin is used for coating the contact surfaces. An operating tool is used to operate this PCB terminal block. The PCB terminal block is designed for THT soldering. The conductor is designed to be inserted at a 0° angle..