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Screw Terminal Block: 3-Pin, 3.5 mm Pitch, Top Entry (4-Pack)

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Pololu item #: 2447
Brand: Generic

These top-entry screw terminal blocks have a pitch of 3.5 mm (0.138″). Each block has three terminals for the stripped ends of 24 – 18 AWG wires, and units can slide together to make longer strips. They are rated for 125 V, 10 A (UL) and ship in packs of four.

Alternatives available with variations in these parameter(s): pins spacing orientation Select variant…

Compare all products in Stackable Screw Terminal Blocks.

Pictures

Side-by-side comparison of our different terminal blocks with a 0.1″ male header strip for size reference. From left to right: 0.1″ screwless, 0.1″ screw, 3.5 mm screw, and 5 mm screw.

Overview

These terminal blocks have terminals that hold and release wires through the simple adjustment of a screw, allowing you to easily make temporary connections to a PCB. The 2-pin and 3-pin units each feature a ridge on one side and a slot on the other, which lets them slide and lock together to form arbitrarily long strips with a pitch of 3.5 mm or 5 mm. Each terminal block is available in two orientations: side-entry and top-entry.

The following short video gives a quick overview of how to install these terminal blocks onto our boards:

Details for item #2447

This product is a four-pack of 3.5mm-pitch, three-pin, top-entry terminal blocks. The more general dimension diagram for an XX-pin version of this screw terminal block is shown below.

Screw terminal block: 3.5 mm pitch, top entry.

• Voltage rating (UL/IEC): 125/130 V
• Current rating (UL/IEC): 10/10 A
• Contact resistance: 20 mΩ
• Wire gauge: 24-18 AWG
• Wire strip length: 5 mm

Other terminal block options

We carry several different sizes and styles of terminal blocks in addition to these stackable screw terminal blocks; the picture below shows a side-by-side comparison:

Side-by-side comparison of our different terminal blocks with a 0.1″ male header strip for size reference. From left to right: 0.1″ screwless, 0.1″ screw, 3.5 mm screw, and 5 mm screw.

• Screwless (spring) terminal, available in side- and top-entry orientations with pitches of 0.1″ and 0.2″:

Alternatives available with variations in these parameter(s): pins spacing orientation Select variant…

• 0.1″ screw terminal, which can be used in place of standard 0.1″male and female headers on many PCBs; the only available orientation is side-entry:

Alternatives available with variations in these parameter(s): pins Select variant…

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