20cm Male-to-Male Jumper Wires, 40-Piece Set

20cm pin-to-pin jumper wires

This set is listed as 40 male-to-male jumper leads with a 20cm length. Each lead has a male pin at both ends for joining compatible female contacts, such as suitable breadboard sockets and female headers.

It is not a male-to-female or female-to-female set. Check the contact style required at both ends before ordering.

Working room for a bench prototype

The 20cm length provides a middle option for linking nearby breadboards and suitable female headers. Check the distance along the actual wire route rather than the straight-line gap alone.

Check mechanical and electrical compatibility

• Length targeted by this page: 20cm.
• Quantity listed: 40 individual leads.
• Connector ends: male to male.
• Pin dimensions and header pitch: confirm for the supplied lead and target socket.
• Wire gauge, current rating and conductor specification: not independently verified.

The catalogue also carries other length labels. Confirm that the order is for the 20cm set if the displayed order details show more than one length. Brand origin and compatibility with every development board are not established.

These are passive connections: they do not regulate voltage or translate logic levels. Check the pinout, signal voltage and polarity of the connected devices before powering a circuit.

Build the prototype carefully

Disconnect power while changing wiring, keep exposed pins from touching adjacent contacts and avoid forcing an oversized pin into a socket. No mains or high-current load rating is verified. Use properly rated wiring for battery power paths, motors or other substantial loads.

For another layout, compare 30cm male-to-male jumper wires or 10cm male-to-male jumper wires.

Frequently asked questions

Are both ends pins?

Yes. This listing describes male-to-male, pin-to-pin leads.

Will the wires convert a 5V signal to 3.3V?

No. A jumper lead provides a connection, not logic-level conversion.