# Push-in PCB terminal block

A PCB terminal block with push-in spring connection, of the Phoenix Contact SPT type:

- SPT 1,5: 3.5 mm pitch, horizontal.
- SPT 2,5: 5.0 mm pitch, horizontal or vertical, standard or the Ex eb version (`-EX`).
- SPT 5: 7.5 mm pitch, horizontal or vertical. It has either two solder pins per position or one per position in alternating rows (zigzag, `-ZB`).

Pin 1 is at the origin; with two pins per position, that's pin 1's back pin. The row runs along +X. The housing sits on the XY plane with its front facing -Y, and the solder pins go down through the board. A horizontal block (`-H-`) takes its wires at the front, under a release slot for a screwdriver. A vertical block (`-V-`) takes them from the top, with the release slot in front of the wire entry.

| Series, style | Pitch | Width | Pin 1 from the left end | Length | Height above the board | Solder pins | Pin rows | Back row from the back face |
|---|---|---|---|---|---|---|---|---|
| SPT 1,5 horizontal | 3.5 | a + 4.9 | 1.3 | 14.4 | 13.5 | 0.8 x 0.8, 2.5 long | 8.2 apart | 2.53 |
| SPT 2,5 horizontal | 5.0 | a + 6.4 | 2.3 | 14.4 | 13.5 | 0.8 x 0.8, 2.5 long | 8.2 apart | 2.53 |
| SPT 2,5 vertical | 5.0 | a + 6.4 | 2.3 | 13.5 | 14.4 | 0.8 x 0.8, 2.5 long | 8.2 apart | 2.75 |
| SPT 5 horizontal | 7.5 | a + 9.3 | 6.55 | 24.15 | 19.6 | 1.7 x 0.8, 4.6 long | 13.2 apart | 1.9 |
| SPT 5 vertical | 7.5 | a + 9.3 | 6.55 | 18.5 | 24.15 | 1.7 x 0.8, 4.6 long | 14 apart | 2.58 |

Here a = pitch x (positions - 1). SPT 1,5 and SPT 2,5 have two pins per position (linear double pinning). SPT 5 with zigzag pins (`-ZB`) has pin 1 in the back row, pin 2 in the front row, and so on. The SPT 5 width is the drawing's a + 7.5 plus its 1.8 end plate. Its pins are 1.7 across the row and 0.8 along it, as the front view draws them.

Positions offered: SPT 1,5 and vertical SPT 2,5, 2 to 12; horizontal SPT 2,5 and SPT 5, 1 to 12; zigzag, 2 to 12. These are the old catalogue's range. The drawings give the width for any count.

## Source

Phoenix Contact data sheets, each generated from Phoenix Contact's online catalogue. Copies are from Chip and Dip (static.chipdip.ru), SIC Components (datasheet.sic-components.com), Datasheets.com (static.datasheets.com) and Chipsmall (datasheet.chipsmall.com), because Phoenix Contact's own site refuses automated downloads.

- *PCB terminal block - SPT 1,5/ 3-H-3,5 - 1990740* (07/26/2021), <https://static.chipdip.ru/lib/778/DOC031778622.pdf>: weight 3.150 g (page 1); length 14.4, width 11.9, height 13.5 without the 2.5 solder pins, pins 0.8 x 0.8, pin spacing 8.2 (page 2); drilling diagram (page 5): 1.3 to pin 1, the back row 2.53 from the back; dimensional drawing (page 6): width a + 4.9.
- *PCB terminal block - SPT 2,5/ 2-H-5,0 - 1990973* (01/17/2021), <https://static.chipdip.ru/lib/778/DOC031778624.pdf>: weight 2.800 g (page 1); length 14.4, width 11.4, height 13.5 without the 2.5 solder pins, pin spacing 8.2, pins 0.8 x 0.8 (page 3); drilling diagram and dimensional drawing (page 5): 2.3 to pin 1, width a + 6.4, the back row 2.53 from the back. The 04/06/2015 edition, <https://static.chipdip.ru/lib/026/DOC038026507.pdf>, gives the same dimensions and 2.65 g.
- *PCB terminal block - SPT 2,5/ 2-H-5,0-EX - 1732386* (03/27/2014), <https://datasheet.sic-components.com/1732386.pdf>: drilling diagram and dimensioned drawing (page 2), the same dimensions as 1990973.
- *SPT 2,5/ 2-V-5,0-EX - PCB terminal block, 1732496* (Mar 27, 2024), <https://static.chipdip.ru/lib/319/DOC043319292.pdf>: weight 3.053 g (page 1); Dimensions (page 3): width 11.4, height 16.9, length 13.5, installed height 14.4, solder pins 2.5 long and 0.8 x 0.8; drilling plan (page 5): 2.3 to pin 1, rows 8.2 apart, the back row 2.75 from the back. The dimensional drawing of *SPT 2,5/ 3-V-5,0 - 1991105* (page 6), <https://static.chipdip.ru/lib/778/DOC031778632.pdf>, draws the same housing: 13.5, 14.4, a + 6.4, 2.3, 8.2, 2.75.
- *SPT 5/ 4-H-7,5-ZB, Order No. 1719215* (Feb 17, 2010), <https://static.datasheets.com/doc/14748888-phoenix-contact-1719215-ds.pdf>: weight 0.016102 kg, dimension a 22.5 (page 1); pins 1.7 x 0.8, pin spacing 7.5, holes 2.1 (page 2); drilling plan (page 3): 6.55 to pin 1, the back row 1.9 from the back, the front row 13.2 ahead, pins alternating between the rows; dimensioned drawing (page 4): length 24.15, height 19.6, pins 4.6 long, width a + 7.5 and a 1.8 end plate.
- *PCB terminal block - SPT 5/ 1-V-7,5 - 1719309* (13/02/2015), <https://static.chipdip.ru/lib/731/DOC026731163.pdf>: weight 4.48 g, pins 1,7 x 0,8, pin spacing 14 (page 1); drilling diagram and dimensioned drawing (page 5): 6.55 to the pin, the back row 2.58 from the back, two pins 14 apart, length 18.5, height 24.15, pins 4.6 long, width 7.5 and a 1.8 end plate.
- *PCB terminal block - SPT 5/ 3-V-7,5-ZB - 1719325* (10.10.2012), <https://datasheet.chipsmall.com/1719325/594825.pdf>: drilling diagram and dimensioned drawing (page 5): the same housing as 1719309, a + 7.5 and 1.8, pins alternating between the rows.

The housing is PA, green (RAL 6021), and the contacts are a tin-plated copper alloy (data sheets). The part uses `pa6` and `copper`.

**Proportions, for looks only.** The drawings don't dimension the following:

- the chamfers on the housing's top edges, 0.06 of the height;
- the wire entry, 0.62 of the pitch across (round on SPT 1,5 and SPT 2,5, square on SPT 5, as the front views draw them), 0.55 of the length deep (horizontal) or 0.55 of the height (vertical);
- the release slot, 0.5 of the pitch wide, above the wire entry (horizontal) or in front of it (vertical);
- each position's contact bar, inside the housing's floor between its pin rows: 0.5 of the pitch wide and 1.0 thick. It stands for the current bar and spring that the drawings' sections show, and the pins and bar of a position are one solid.

**Mass**, with `pa6` at 1.15 and `copper` at 8.96 g/cm³, against the data sheets' weights:

| Part | Model | Data sheet |
|---|---|---|
| SPT 1,5/ 3-H-3,5 | 2.95 g | 3.150 g |
| SPT 2,5/ 2-H-5,0 | 2.76 g | 2.800 g |
| SPT 2,5/ 2-V-5,0-EX | 2.76 g | 3.053 g |
| SPT 5/ 4-H-7,5-ZB | 17.41 g | 16.10 g |
| SPT 5/ 1-V-7,5 | 4.88 g | 4.48 g |

## The old catalogue's models

The catalogue's SPT models were measured against the drawings, 10 of them (2026-11-06): SPT 1,5 2-H, SPT 2,5 1-H, 2-H, 2-H-EX and 2-V-EX, SPT 5 1-H, 3-H, 2-H-ZB, 2-V and 3-V-ZB. Their housings have the drawings' length and height, and their pins are where the drawings put them. They differ as follows:

| Models | Theirs | The data sheet (this part) |
|---|---|---|
| all | solder pins 2.6 long and 1.1 square (SPT 1,5, SPT 2,5), round 2.1 dia. (SPT 5) | 2.5 long and 0.8 x 0.8; 4.6 long and 1.7 x 0.8 |
| SPT 2,5 horizontal, also -EX | the housing ends 1.3 before pin 1 and 5.1 past the last pin | 2.3 before pin 1 and 4.1 past the last pin (the width, a + 6.4, is the same) |
| SPT 5 horizontal | the back face 1.85 behind the back row | 1.9 |

The SPT 2,5 horizontal models' housing is shifted 1.0 along the row: Phoenix's drilling diagrams and drawings for both 1990973 and 1732386 put pin 1 2.3 from the end, as do the vertical models. They map to this part, which follows the data sheet.

The double-pinned horizontal SPT 5 blocks (`SPT 5/ 1-H-7,5`, `3-H-7,5`) aren't here yet: no copy of their data sheet was found. See `COVERAGE.md`.