XH2.54 terminal wire is an electronic connection system. The following is a detailed introduction to it:

I. Definition and naming
XH2.54 terminal wire refers to a 2.5/2.54MM pin header connector, also known as a terminal wire.
XH2.54 terminal was originally a part number of JST (Japan Standard Time, Japan Solderless Terminal Manufacturing Co., Ltd.). With the increasingly widespread use of XH2.54, many factories have begun to imitate it. The manufacturer uses such a code to make it more convenient for the selector to know the matching situation with JST.
Now domestic connector manufacturers add (XH, EH, EI, VH) and the like after their own product names, mainly to facilitate the habits of customers.

Definition: The 51005 male terminal wire is a kind of terminal connecting wire with a male head.

Features: It has good electrical conductivity, corrosion resistance, and high-temperature resistance. The terminal part is usually made of phosphor bronze or gold-plated material to ensure the stability and reliability of the connection.

Definition: The 51006 female terminal wire is a kind of terminal connecting wire with a female head (i.e., socket).

Features: It cooperates with the 51005 male terminal wire to form a stable electrical connection. The female head part also adopts high-quality material to ensure good electrical conductivity and durability.

Basic characteristics:
Spacing: 4.2mm.
Conductor material: Tinned copper, with good electrical conductivity.
Insulating material: Commonly, there are PVC, PE, silica gel, etc., which have different properties such as temperature resistance and chemical corrosion resistance.
Structure: Usually composed of a conductor, an insulating layer, and a terminal (male or female).
Terminal type:
The 5557 terminal wire is usually equipped with a male (Male Connector) type terminal. The male terminal generally has a protruding pin for insertion into the socket of the female terminal to form an electrical connection.
The 5559 terminal wire is equipped with a female (Female Connector) type terminal. The female terminal generally has a recessed socket for receiving the pin of the male terminal to complete the electrical connection.

2.54mm Dupont wire is a common electronic connection wire, and its specification parameters usually include the following aspects:

1.Basic specifications
Pitch: 2.54mm, this is the standard pitch between the pins of Dupont wire, and it is also the source of its name.
Wire core material: Usually tin-plated copper wire, this material has good conductivity and corrosion resistance.
Jacket material: Generally PVC (polyvinyl chloride), it has good insulation performance and wear resistance.
2.Electrical performance
Voltage level: The common voltage level is 300V, which is suitable for low-voltage connections in general electronic equipment.
Core count: According to specific needs, the core count of Dupont wire can be different, and common ones include single-core, double-core, multi-core, etc.

The specification parameters of the 51021 1.25mm terminal wire usually include the following aspects:

1.Basic parameters
Model: 51021
Pitch: 1.25mm
2.Electrical parameters
Rated current: usually 1A (it may vary depending on different manufacturers or application requirements)
Rated voltage: generally 125V (or it may vary according to the specific model)
3.Physical parameters
Wire length: can be customized according to specific needs, common lengths such as 150mm, 50mm, etc.
Rubber shell hole position: 2PIN, 3PIN, 4PIN, 5PIN, 6PIN, 7PIN, 8PIN, 9PIN, 10PIN, 11PIN, 12PIN
Interface type: AC/DC (it may vary according to the specific application)
Shape: strip
Contact material: tinned copper
Insulator material: nylon (PA66) or other insulating materials