# Screw Terminal Block: 2-Pin, 3.5 mm Pitch, Top Entry (4-Pack) **Type:** Product page · **SKU:** POLOLU-2446 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/screw-terminal-block-2-pin-3-5-mm-pitch-top-entry-4-pack.html ([markdown](https://core-electronics.com.au/screw-terminal-block-2-pin-3-5-mm-pitch-top-entry-4-pack.html.md)) These top-entry screw terminal blocks have a pitch of 3.5 mm (0.138″). Each block has two 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. ## Pricing - **Price:** $3.30 (inc GST) — $3.00 AUD, exc GST - **Quantity discounts:** 10+ $2.88 (exc GST) · 25+ $2.79 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 17 and Aug 18. ## Description 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 Pololu's boards: **Details for item #2446** This product is a four-pack of 3.5mm-pitch, two-pin, top-entry terminal blocks. The more general dimension diagram for an XX-pin version of this screw terminal block is shown below. | ![](https://core-electronics.com.au/attachments/localcontent/0J3567_396403a2eb5.png) | |---| | 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 mO - Wire gauge: 24-18 AWG - Wire strip length: 5 mm **Other terminal block options** Pololu 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: | [ ![](https://core-electronics.com.au/attachments/localcontent/0J6547_52532c5fc77.jpg) ](https://core-electronics.com.au/attachments/localcontent/0J6547_173484d3323.jpg) | |---| | Side-by-side comparison of Pololu's 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](https://core-electronics.com.au/category/175/screwless-terminal-blocks), available in side- and top-entry orientations with pitches of 0.1" and 0.2": - [0.1" screw terminal](https://core-electronics.com.au/category/177/0.1-2.54-mm-screw-terminal-blocks), which can be used in place of standard 0.1" male and female headers on many PCBs; the only available orientation is side-entry: **People often buy this product together with:** | [ ![Screw Terminal Block: 2-Pin, 5 mm Pitch, Top Entry (4-Pack)](https://core-electronics.com.au/attachments/localcontent/0J3612_50155e54b7.jpg) ](https://core-electronics.com.au/screw-terminal-block-2-pin-5-mm-pitch-top-entry-4-pack.html) | [Screw Terminal Block: 2-Pin, 5 mm Pitch, Top Entry (4-Pack)](https://core-electronics.com.au/screw-terminal-block-2-pin-5-mm-pitch-top-entry-4-pack.html) | |---|---| | [ ![Screw Terminal Block: 2-Pin, 3.5 mm Pitch, Side Entry (4-Pack)](https://core-electronics.com.au/attachments/localcontent/0J3614_44835a6db3.jpg) ](https://core-electronics.com.au/screw-terminal-block-2-pin-3-5-mm-pitch-side-entry-4-pack.html) | [Screw Terminal Block: 2-Pin, 3.5 mm Pitch, Side Entry (4-Pack)](https://core-electronics.com.au/screw-terminal-block-2-pin-3-5-mm-pitch-side-entry-4-pack.html) | |---|---| | [ ![Screw Terminal Block: 3-Pin, 3.5 mm Pitch, Side Entry (4-Pack)](https://core-electronics.com.au/attachments/localcontent/0J3615_4782920ff8.jpg) ](https://core-electronics.com.au/screw-terminal-block-3-pin-3-5-mm-pitch-side-entry-4-pack.html) | [Screw Terminal Block: 3-Pin, 3.5 mm Pitch, Side Entry (4-Pack)](https://core-electronics.com.au/screw-terminal-block-3-pin-3-5-mm-pitch-side-entry-4-pack.html) | |---|---| **Dimensions** | Pins: | 2 | |---|---| | Spacing: | 3.5 mm | **General specifications** | Wire gauge: | 24-18 AWG | |---|---| | Current rating: | 10 A[1](https://core-electronics.com.au/#note1) | | Voltage rating: | 125 V[1](https://core-electronics.com.au/#note1) | | Contact resistance: | 20 mO | | Wire strip length: | 5 mm | | Terminal type: | screw | | Orientation: | top entry | **Notes:** 1 UL rating. ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/s/c/screw_terminal_block_2_pin_3.5_mm_pitch_top_entry__4_pack___pololu_2446__00.jpg)