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40 pin female header, 2.54 mm pitch, 1 row, straight
40-pin female connector at 2.54 mm pitch, ideal for making quick connections between PCBs, sensors and modules. The pins provide precise fixing and stable contact, are easy to mount on the board, are compatible with most Arduino and prototyping projects, and are suitable for extensions, testing and modular wiring.
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The 40-position female pin header is a single-row socket connector with 2.54 mm pitch, soldered onto a PCB, which receives the male pins of modules, sensors and other boards with 2.54 mm pins. It is suitable for assemblies where the module must be removed and replaced without desoldering, for extension boards, adapters and perforated test boards.
Each position has its own metal contact, hidden in the black plastic housing, and the straight pin at the opposite end passes through the hole of the PCB and is soldered to the pad. The strip does not connect neighboring positions to each other, so connections are made only through the traces of the board on which it is soldered. The nominal length of the full strip is 101.6 mm, that is 40 x 2.54 mm, and the strip can be cut to the required number of positions.
The main features include the 40 positions arranged in a single row, the 2.54 mm (0.1 inch) pitch, the black plastic housing with open holes for the male pins, and the straight solder tails for through-hole mounting. The product is a passive component and does not require power supply.
Specifications:
Product type: Female socket connector (female pin header)
Number of positions: 40
Number of rows: 1
Pitch: 2.54 mm (0.1 inch)
Orientation: Straight, straight solder pins
Mounting: Through-hole, soldered on PCB
Housing color: Black
Nominal strip length: 101.6 mm
Dimensions: 101.6 x 2.54 mm
Usage:
Determine the number of positions you need according to the number of pins of the module, and use the full strip only if the module has 40 pins.
For a shorter piece, mark the cutting point on the housing and cut the strip with side cutters or a cutter, through the hole of one extra position, because that position is lost. Do not cut through the area between two positions, because the thin plastic breaks and damages the neighboring position.
After cutting, check that the pins of the remaining piece are straight and that no plastic residue remains in the holes, and straighten any slightly bent pins with tweezers.
Insert the pins of the strip into the holes of the board, with the black housing towards the top face of the board, then turn the board over and solder first a single pin at one of the ends.
Check that the strip sits perpendicular to the board, and if it is tilted, reheat that pin and gently press the strip into the correct position. Then solder the pin at the other end and, once the strip is fixed, the remaining pins.
Solder each pin for a few seconds and avoid prolonged contact of the iron tip with the housing, because the plastic can deform.
After the solder joints have cooled, insert the module into the socket with the pins aligned along the entire length and press evenly, without forcing one end.
Check with a multimeter in continuity mode that each position is connected to its trace and that there are no solder bridges between neighboring positions.
Do not use the strip for high currents or for mains voltage, because the contacts of a socket of this type are small.
- Dimensions
- 101.6 x 2.54 mm
- Colour
- Black
- Number of pins
- 40
- Length
- 101.6 mm
- Connector type
- Female pin header, straight
- Mounting
- THT
- Pin pitch
- 2.54 mm
Produs destinat utilizarii in proiecte electronice, automatizari, prototipare, educatie si cercetare.
Produsul trebuie utilizat numai conform specificatiilor tehnice mentionate in descriere si/sau in documentatia produsului.
Avertismente generale de siguranta:
Nu utilizati produsul la tensiuni, curenti sau temperaturi peste valorile specificate.
Montajul si conectarea trebuie realizate de persoane cu cunostinte tehnice minime in domeniul electric/electronic.
Evitati scurtcircuitele, inversarea polaritatii si conectarea gresita a alimentarii.
Nu lasati produsul alimentat nesupravegheat in timpul testelor.
Produsul nu este jucarie si nu este destinat copiilor.
Pentru modulele electronice, se recomanda utilizarea in carcase, panouri sau montaje protejate, dupa caz.
Identificare produs:
Denumirea produsului, codul/SKU-ul si caracteristicile tehnice sunt mentionate in pagina produsului si/sau pe eticheta ambalajului.
Producator / Importator / Distribuitor:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Website: www.sigmanortec.ro
Persoana responsabila in UE:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Documentatie si siguranta:
Pentru informatii suplimentare, fise tehnice, declaratii de conformitate sau instructiuni, ne puteti contacta la [email protected].
Reviews (18) - Review moderation
E OK! Atentie, daca vrei sa tai din ea, cu siguranta un pin se va pierde
OK
Ok
FB
totul ok .recomand
A 40-position, 2.54 mm pitch female pin header is a single-row socket connector that is soldered onto a PCB and accepts the male pins of modules and sensors. It is used when you want a module to be removable and replaceable without desoldering, or when you build an extension board for an assembly.
The product is a passive component, with no power supply, no controller and no program, so the tutorial does not use any development board. It shows, step by step, cutting to length and soldering the assembly with a soldering iron.
How it works:
Each position of the header contains a metal contact shaped like pincers, hidden in the black plastic housing. The male pin inserted into the hole spreads the contact and is held by its elasticity, which ensures both the electrical connection and the mechanical fixing. At the opposite end, the contact comes out as a straight pin that passes through the hole of the PCB and is soldered to the pad.
The distance between two neighbouring positions is 2.54 mm, that is 0.1 inch. The nominal length of the header results from the number of positions: 40 x 2.54 mm = 101.6 mm. The same formula is used for a piece cut to length, for example 8 positions x 2.54 mm = 20.32 mm. The 2.54 mm pitch is that of most modules, sensors and prototyping boards with holes, so their pins fit directly into the socket.
Each position is a separate contact, and the header does not connect neighbouring positions to each other. Connections between pins are made only through the traces of the PCB on which you solder the header.
Connection:
The header is not powered and has no polarity. It is connected mechanically and electrically only by soldering to the board, and the voltage and current are set by the circuit you build. It can be used for 3.3 V or 5 V logic signals, for I2C, SPI or UART buses and for powering small modules, like any 2.54 mm socket. For high currents or mains loads, do not use it.
| Product pin | Connects to | Role |
|---|---|---|
| Solder pins, positions 1 - 40 | One hole pad of the PCB, at 2.54 mm pitch | Take the signal or power from the board trace |
| Socket holes, positions 1 - 40 | Male pins of the module or sensor | Make the removable contact with the module |
Configuration:
The header has 40 positions, and most of the time you need fewer. Set the number of positions according to the number of pins of the module and mark the cutting place on the housing, for example after position 8 for a module with 8 pins.
Cut the header with side cutters or a cutter, through the hole of one extra position. This position is lost, because the cut goes through the housing and through its contact. Therefore, for a module with 8 pins, cut a piece of 9 positions and remove the end position or leave it unused. Do not cut through the area between two positions, because the thin plastic between them breaks and damages the neighbouring position.
After cutting, check that all the pins of the remaining piece are straight and that no plastic debris is left in the holes. Straighten slightly bent pins with tweezers.
Example of use:
Example: mount a 6-pin module on a perfboard, so that the module can be removed at any time.
Cut a 7-position piece from the header, with the cut through the 7th position, then remove the cut position. You are left with 6 positions, that is 6 x 2.54 mm = 15.24 mm.
Insert the header pins into the holes of the board, with the black housing towards the top face of the board. Turn the board over and first solder just one pin at one of the ends. Heat the pin and the pad for 2 - 3 seconds, then add a little solder.
Check from one side that the header sits perpendicular to the board. If it is tilted, reheat that pin and gently press the header into the correct position. Then solder the pin at the other end and, once the header is fixed, the remaining pins.
Let the joints cool, then insert the module into the socket, with the pins aligned along the whole length. Press evenly, without forcing one end. At the end, check with a multimeter in continuity mode that each position is connected to its trace and that there are no solder bridges between neighbouring positions.
Common problems:
The header does not sit straight on the board. The cause is usually soldering all the pins before checking the position. Reheat the pin at one end, press the header onto the board and repeat the check before soldering the remaining pins.
Two neighbouring pins are short-circuited. At 2.54 mm pitch, excess solder can form a bridge between pads. Remove the solder with desoldering wick or a desoldering pump, then resolder with less solder.
The module does not fit into the socket or fits with difficulty. Most often the module pins are slightly bent or the module does not have a 2.54 mm pitch. Straighten the pins with tweezers and check the pitch of the module. Do not force the insertion, because you will deform the socket contacts.
Intermittent contact on one pin. The module pin may be oxidised or dirty, or the socket contact has loosened after many insertions. Clean the module pin with isopropyl alcohol and reinsert it. If the problem remains, do not use that position for sensitive signals.
The plastic housing deformed during soldering. The cause is contact with the soldering iron tip for too long or too high a temperature. Solder each pin for a few seconds and let the header cool between neighbouring pins.
Limitations and tips:
The header is suitable for logic signals, data buses and powering modules with low consumption. The contacts of this type of socket are small, so they are not suitable for high currents, and they are not used at all for mains voltage. For an assembly that must carry higher current, split the consumption over several pins or use connectors rated for that current.
The number of insertions is limited, because the contact wears over time. For modules that are changed often, use a separate socket or a new header. For assemblies exposed to vibration, also fix the module mechanically, for example with spacers and screws.
With the same header you can make extension boards, adapters between modules and perfboard test boards, cutting each time the right number of positions.
