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Beginner question: I have a sensor board which has 6 solder pads (in parallel to each other, just a line of 6 pads), but no holes. Do there exist any connectors (like molex) that allow to fit the connector to the board? I didn't find any suitable connectors, but maybe I am using the wrong search terms. It seems all connectors require holes in the board.

Or do I simply have to solder the (flat) wire directly onto the board solder pads?

EDIT Here is a picture of the pads. The distance between the center of the first and last pad is 7.5 mm (I made a measurement error before). The solder pads are in the middle of the board, not near the edge.

enter image description here

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  • \$\begingroup\$ A picture showing "geometry" sold be useful. \$\endgroup\$
    – Antonio51
    Commented Dec 21, 2022 at 12:03
  • \$\begingroup\$ It sounds like you might be looking for card edge connectors, although those typically require pads on both sides of the PCB and are also somewhat picky with PCB thickness (1.6mm is by far most common). Please post a picture. \$\endgroup\$
    – Lundin
    Commented Dec 21, 2022 at 12:05
  • \$\begingroup\$ What's the size and pitch of the pads? If they're large and spaced far apart, finding a connector will probably be easy; if they're small and close together, finding a connector will probably be hard. \$\endgroup\$
    – Sophie Swett
    Commented Dec 21, 2022 at 12:17
  • \$\begingroup\$ That's 1.5mm pitch, pretty fine. If there is a connector that it has been designed to fit there will be additional outboard pads and/or holes to provide support. \$\endgroup\$
    – Spehro 'speff' Pefhany
    Commented Dec 21, 2022 at 13:36
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    \$\begingroup\$ @DavideAndrea There are 5 spaces between the 6 pads, 7.5/5 = 1.5. \$\endgroup\$
    – Spehro 'speff' Pefhany
    Commented Dec 21, 2022 at 14:43

1 Answer 1

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JST ZH

P/N B6B-ZR-SM4-TF(LF)(SN)

6 circuits, 1.5 mm pitch, surface mount, straight

Mating plug: P/N ZHR-6

Place it so that the PCB terminals are centered on the pads. You won't be able to solder the mounting terminals at either end.

Do understand that SMD pads are delicate: if you pull on the wires to the plug, the pads may lift off the PCB

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    \$\begingroup\$ OP has indicated that the pads have a 1.5mm pitch, not 2.5mm. \$\endgroup\$
    – brhans
    Commented Dec 21, 2022 at 14:03
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    \$\begingroup\$ 6 pads in one line = 5 times the pitch = 7.5/5 = 1.5mm \$\endgroup\$
    – Paul
    Commented Dec 21, 2022 at 14:36
  • \$\begingroup\$ I am embarrassed. Thank you for catching my first-thing-in-the-morning mistake. \$\endgroup\$
    – Davide Andrea
    Commented Dec 21, 2022 at 14:50

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