With the development of society and the advancement of science and technology, connectors are playing an increasingly important role in various fields.
Test standards for connectors and inspection of connector products
Blog | Nov 08,2022
In order to ensure their safety, durability, and other performance, it is essential to test connectors. In order to ensure that the connectors sent to customers are of high quality and good performance, LHE will conduct a series of tests on the produced connectors before leaving the factory.
But do you know the testing standards for connectors? The following is an introduction to the standards we usually use to test connectors.
The test standard of the connector
Generally speaking, the test standards of connectors mainly include 7 aspects: insertion force, insulation resistance, durability, withstand voltage, contact resistance, vibration, and mechanical shock, as follows:
1. Connector insertion force test. Reference Standard: EIA-364-13
2. Connector insulation resistance test. Reference Standard: EIA-364-21
3. Connector durability test. Reference Standard: EIA-364-09
4. Connector withstands voltage test. Reference Standard: EIA-364-20
5. Connector contact resistance test. Reference Standard: EIA-364-06/EIA-364-23
6. Connector vibration test. Reference Standard: EIA-364-28
7. Connector mechanical shock test. Reference Standard: EIA-364-27
However, here is a reminder that different manufacturers refer to different standards according to their actual conditions. For example, some electronic connectors are required to operate at extremely high or low temperatures, and general reference standards no longer apply here.
Regardless of which standard a connector is tested against, the ultimate goal is to ensure that the connector will function in its operating environment. The above are the general connector test standards.
The basic structure of the connector
The connector is a component that connects a circuit to transmit current in an electronic device and is irreplaceable.
The basic structure of the connector can be divided into four parts: contacts, insulators, shells, and accessories.
Contact: It is composed of a male contact and a female contact, and the electrical connection is completed by the insertion of the two contacts. The contact piece is the core part of the connector, which mainly plays the role of electrical connection.
Insulator: The contacts can be arranged at the required position and spacing, and the insulation performance between the contacts and between the shell and the contacts is guaranteed. The insulator is also called the base and the mounting plate, and the insulating material is required to have good insulation resistance, withstand voltage performance, and ease of processing.
Shell: As the outer cover of the connector, it mainly provides mechanical protection for the built-in insulating mounting plate and pins.
Accessories: There are two kinds of structural accessories and installation accessories. Structural accessories – retaining rings, coupling rings, cable clamps, positioning pins, guide pins, sealing rings, gaskets, etc.; installation accessories – screws, nuts, screws, spring rings, etc.
After the connector is manufactured, the finished product is usually tested and inspected. For example, for BTB/FPC connector testing, high-current shrapnel micro-needle modules are used for connection, which can play the role of current conduction and maintain the stability of the test.
In the current transmission, the high-current shrapnel micro-needle module has a bearing capacity of up to 50A, the minimum desirable pitch value can reach 0.15mm, and has an average service life of 20w times, high precision and low impedance, which is conducive to improving the test efficiency.
Inspection of connector products
Connector product inspection requirements mainly cover appearance, quality and performance. embodied in;
Structural size: There are certain requirements for the shape and size of the shape. There are space restrictions at the connection of the connector. For example, the single-board connector cannot be in contact with other parts. Therefore, the inspection of the structural size is the first priority.
Reliability: The reliability of the connecting components is related to the signal connection strength of the connector, and reliability is a must-check item for the performance inspection of the connector.
Shielding: The shielding effect of the connector is also getting more and more attention. The shielding effect can be achieved by connecting the metal shell of the connector to the shielding layer or wrapping the plug part of the connector with copper to shield the cable’s shielding layer. It is welded with copper to play the role of shielding.
Universality: When selecting connectors, try to choose common objects, which can reduce supply risks and costs, and reduce the types of materials.
Durability: The durability of the connector is reflected in whether it can adapt to complex environments. Common inspection indicators include high-temperature resistance, low-temperature resistance, salt spray resistance, and corrosion resistance.
Impedance matching: The RF signal of the connector has high requirements for impedance matching. Impedance mismatch will cause signal reflection and affect signal transmission.
The connectors that have passed the test and inspection are guaranteed in terms of performance and quality and are relatively safe to use. With the development of electronic products, the performance of connectors is also developing towards high-speed, high integration, and digitalization, and the volume is becoming more and more miniaturized and miniaturized.
The market is expected to show an upward trend in the future. Zhejiang Lianhe Electronics Co., Ltd. is a high-tech enterprise specializing in the production of automotive connectors, home appliance connectors, computer connectors, communication network optoelectronic connectors, and other products. Welcome new and old customers to come and buy.
--- END ---