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Special connection method opens new applications for compact power PCB terminals

20 October 2017

Six new PCB terminal blocks from WAGO allow equipment designers and OEMS to free up space or use smaller PCBs and enclosures.

Push-in connection reduces installation time, while a spring pressure mechanism protects wiring against vibration and temperature cycling, improving reliability. 

The terminal blocks are rated for 4, 6 and 16mm2 conductors, and can connect most solid and fine-stranded conductors up to the next larger cross-section size from their rated cross-section, saving space on the PCB. A rated voltage of up to 1000 V and 76 A makes the terminal blocks ideal for demanding applications such as power supplies, frequency inverters or servo drives. The increasingly compact design of these devices for industries such as energy means that components must be more densely populated on the PCB while still retaining a high power rating. The small footprint of WAGO’s new variants helps to address this problem, making them suitable for use in space-restricted and panel feedthrough applications.

The terminal block ranges use either lever or tool-actuated operation. Lever types (2604, 2606 and 2616 Series) are tool-free, and suitable for installations that require components to be wired in the field. Users simply strip the wire to the required length, open the lever, insert the wire and then close the lever. The lever clearly and audibly locks into both open and closed positions for intuitive operation. This ease of use allows installation to be carried out in half the time compared to equivalent screw-type terminal blocks. All conductor types can be accommodated, including solid, fine-stranded and ferruled. The terminals will also accept two conductors in a twin ferrule.

Tool-operated terminal blocks (2624, 2626 and 2636 Series) require an operating tool inserted parallel to conductor entry. The wire is then simply pushed in by hand, and the operating tool removed. The conductor is then securely connected. Conductors can be terminated both horizontally and vertically to the PCB, affording the flexibility to maximise available PCB space. Testing can be performed both parallel and perpendicular to the conductor entry. As with the lever types, solid, stranded, fine-stranded and ferruled conductor types can be accommodated and a twin ferrule can be used if two conductor entry is required.

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