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Ningbo Yinzhou Defa Aluminum Profile Accessories Co.,Ltd
Add:No.44 Lengshui'an Road, Yinjiang Twon, Haishu Zone, Ningbo, China
Profile Connectors Reliability Of Contact

Profile Connectors in the circuit is blocked or isolated between the circuit, the bridge to communicate, so that the current flow, so that the circuit to achieve the intended function. A connector is an indispensable part of an electronic device, and you will always find one or more Profile Connectors along the current flow path.

Connector form and structure is ever-changing, with the application of objects, frequency, power, application environment and so on, there are various types of Profile Connectors.

1. Mechanical properties

Mechanical properties in terms of connection function, the plug-pull force is an important mechanical properties. The insertion force is divided into inserting force and pulling capacity (Pull-out force is also called separation), the requirements of the two are different. The maximum insertion force and minimum separation force in the relevant standards indicate that, from the point of use, the insertion force is small (thus having a low insertion force of LIF and a ZIF structure), while the separation force is too small to affect the reliability of the contact.

Another important mechanical property is the mechanical life of the connector. The mechanical life is actually a kind of durability index, it is called as mechanical operation in GB GB5095. It is based on a single insertion and one pull-out for a loop to evaluate the connection function (such as contact resistance value) after the specified plug-and-pull cycle is complete. The insertion force and the mechanical life of the connector are related to the quality of the coating (sliding friction coefficient) and the precision (alignment) of the contact parts in the contact part structure (positive pressure size).

2, electrical performance

The main electrical properties of electrical performance Profile Connectors include contact resistance, insulation resistance and electrical strength.

01 Contact Resistance

Electrical Profile Connectors with high quality contact resistance should have low and stable contact resistance. The contact resistance of the connector ranges from several cents to dozens of cents.

02 Insulation Resistance

The insulation resistance measures the insulation performance between the contact parts of the electrical connector and the contact parts and the housing, and its magnitude is hundreds of trillion to thousands of trillion euro.

03 Anti-Electric Strength

Resistance to electrical strength or voltage, dielectric pressure, is to characterize the connector between contact parts or between the contact and the shell to withstand the rated test voltage capacity.

3. Environmental performance

Environmental performance common environmental performance including temperature, moisture resistance, salt spray, vibration and shock.

01 Temperature Resistance

Temperature at present the highest operating temperature of the connector is 200 Shan (except for a few high-temperature special Profile Connectors), with a minimum temperature of 65 Shan. As the Profile Connectors work, the current at the point of contact to generate heat, resulting in temperature rise, it is generally believed that the working temperature should be equal to ambient temperature and contact temperature rise of the sum. In some specifications, the maximum allowable rise of the connector under rated operating current is specified.

02 Moisture Resistance

Moisture-resistant intrusion can affect the insulation performance of the connection and corrode metal parts. Constant damp-heat test conditions for relative humidity $number (according to product specifications, up to 98%), temperature Pokter 20, test time according to product requirements, at least 96 hours. Alternating heat and humidity tests are more stringent.

03 Salt Spray

Salt mist Profile Connectors in the environment containing moisture and salt, the metal structure, contact surface treatment layer may produce electrochemical corrosion, affecting the physical and electrical properties of Profile Connectors. In order to evaluate the ability of electrical Profile Connectors to withstand this environment, salt spray tests are provided. It is to suspend the connector in the temperature controlled test chamber, using the prescribed concentration of sodium chloride solution with compressed air spray, forming a salt mist atmosphere, the exposure time by the product specification, at least 48 hours.

04 Vibration and impact

Vibration and impact vibration and impact is an important performance of electrical Profile Connectors, in special applications such as aviation and aerospace, railway and road transport is particularly important, it is to test the mechanical structure of electrical Profile Connectors and electrical contact reliability of the important indicators. There are clear provisions in the relevant test methods. The peak acceleration, duration and impulse waveform, as well as the interruption time of electrical continuity, should be specified in the impact test.

05 Other environmental performance

Other environmental performance in accordance with the requirements of the use of electrical Profile Connectors Other environmental performance is also sealed (air leakage, liquid pressure), liquid impregnation (for specific liquids, the ability to resist vice), low pressure and so on.

The basic structure of the Profile Connectors

The basic structure of the connector has contact parts, insulators, housings (depending on variety) and accessories. Here is a brief description of the structure of the connector.

1. Contact Parts

The contact piece (contacts) is the core part of the connector that completes the electrical connection function. The contact pairs are generally composed of positive contact parts and negative contact parts, and the electrical connection is completed through the insertion of the yin and yang contact parts.

01 Positive Contact Parts

The positive contact is a rigid part whose shape is cylindrical (circular pin), square column (square pin) or flat (insert). The positive contact parts are usually made of brass and phosphor bronze.

02 Negative Contacts

The negative contact piece is the key part of the contact pair, which relies on the elastic structure to form a close contact with the positive contact parts when the elastic deformation occurs with the pin, and completes the connection. There are many kinds of holes in the structure, such as cylinder type (split groove, necking), tuning fork type, cantilever beam type (longitudinal grooving), Folding type (longitudinal grooving, 9 shape), box (square hole), and double curved wire spring jack, etc.

2, insulator

An insulator is also often referred to as a base (base) or mounting plate (insert), which is used to align the contact parts to the desired position and spacing and to ensure insulation between the contact and the contact piece and the housing. Good insulation resistance, voltage resistance and easy processing are the basic requirements for the selection of insulating materials to be processed into insulators.

3. Shell

Also known as the shell (shell), is the housing of the connector, it provides mechanical protection for the insulated mounting plate and pins, and provides the alignment of plugs and sockets, thereby attaching the Profile Connectors to the device.

4. Annex

Annexes and installation attachments. Structural accessories such as card ring, positioning key, positioning pin, guide pin, connection ring, cable clamp, sealing ring, gasket, etc. Installation accessories such as screws, nuts, screws, spring rings, etc. Most of the accessories have standard parts and general parts.

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