What is M8 Connector? How to Choose M8 Connectors Manufacturers?

There are mainly two types of M8 connectors in the market : molded cable M8 connectors and assembled M8 connectors.Because it is often used in sensor connection in industrial automation, it is also called sensor connector , the metal shell assembly type M8 connector is also called M8 aviation plug.

M8 connector, a very widely used connector, especially in automation control systems ,the controller connects the sensor and the actuator. If you need this connector but don’t know how to choose a product, our ultimate M8 connector tutorial will help you a lot.

The molded M8 connector firstly welds the cable to the contact of the M8 connector , then mold the cable onto the connector .

There are three cable materials used mostly, PUR, PVC and TPU. In harsh environments, such as oil pollution, cold, and high temperature, PUR cables are preferred. PUR cable has outstanding performance, wear resistance, oil resistance and temperature resistance -30C°+85C°. The length of the cable can be customized according to the customer’s requirements, such as 1 meter, 2 meters, 5 meters, 10 meters to 50 meters, etc. The four colors cable such as black, orange, yellow, and gray are the most used, suitable cable diameter for the M8 waterproof connector 3.5-5.0mm.

The shell of assembly M8 cable connector is generally made of brass, with nickel-plated surface treatment, generally has 3 pins and 4 pins, contacts soldered to the conductors, supports 3-5mm OD cable, injection-molded M8 connectors are generally made of PA66 shells ,gold plated pins, there are A coded 3 4 6 8 pins, B coded 5 pins, D coded 4 pins, its external form can be divided into two different types: straight plug or right angled plug。

What are M8 connectors used for?

M8 connectors can be used for outdoor lighting boxes, construction machinery, solenoid valves, instrumentation, pressure change transmitters, steel production equipment, power equipment, temperature transmitters, hydraulic machine tools, sensors, mining machinery, marine machinery, automotive equipment, automation Production equipment , these require waterproof connections, do not require high electrical parameters, and require relatively small size applications.

What is a 3-pin 4-pin M8 waterproof connector?

It’s M8 connector with 3 or 4 contacts, which can be molded cables or cable assemble.

The cable assemble M8 connector can be shipped separately without cables, which is convenient for customers field maintance , and the installation is fast and convenient, don’t need special tools.

The overmolded M8 connector needs to be shipped with the cables, cable length customized by the customer, molded M8 connector can prevent wrong connections that caused by manual assembly or less protection level , if you want to know M8 connector , click here

What affects the performance of the M8 connector?

Because most of M8 connectors are used in industrial or outdoor environments, customers needs stable and reliable M8 connectors. What factors will verify if the the M8 connectors are reliable?

1) Humidity will verify if M8 connectors have good protection level

The humidity environment can detect the protective performance of the M8 connector. The combination of water and air or other elements in the environment will produce corrosive gases or liquids, which may corrode the surface of the connector, also will short the circuit when water enters the interior of the connector and damage the equipment. The air may oxidize the contact of the connector , affecting the Conductivity. Therefore, the shell of the high quality M8 connector needs to have very good corrosion resistance, have very good waterproof performance, isolate the contact from water vapor and air, and have anti-vibration ability, to ensure connection won’t get loose under vibration environment.

2) Temperature will have an important impact on the performance of M8 connectors

When the temperature is high, the volume of the object will become larger, and when the temperature is low, the size of the object will shrink. First of all, the shrinkage and expansion of the shell may affect the waterproof function of the M8 connector.

Different seasons and different working locations, even morning and evening will have big temperature difference. After the M8 connector is connected, the current will also generate heat, which will cause the temperature rise of the connector. Poor quality shell of M8 connectors may crack, or may some gap will be created, water vapor may enter the inside of the connector, leads to short circuit,or contacts corroded. Therefore, temperature resistance is very important for M8 connectors, and the difference between high and low temperatures should not cause deformation, expansion, and shrinkage. Normally M8 connectors can withstand a maximum of 85 degrees and a minimum of minus 25 degrees.

How to choose a good M8 connector?

Different brands have different M8 connectors. Even the same manufacturer has different M8 connectors. How to choose the right M8 connector that is suitable for your requirements? The following 5 aspects will help you choose the right M8 connectors:

1) M8 connector connection method: First of all, it is necessary to confirm whether the M8 connector is connected to another plug, a socket on the panel, or a socket on the PCB, needs a male plug or a female plug, and will need a plug or socket .

2) Electrical performance of M8 connectors: waterproof M8 connectors can be used for power connection or signal and data transmission. This has different requirements for the voltage and current of the connector. Voltage or current that exceeds the carrying capacity of the connector will cause connector damage. The voltage and current of M8 connectors with different pin numbers are also different. We should choose appropriate M8 connector according to the parameters from the manufacturer.

3) Size and structure of the M8 connector: If the installation environment have enough space, there will be no requirements for the size of the M8 connector. For some equipment and cabinets, the installation space for the M8 connector is very limited, have to use the right angled M8 connector. If the M8 connector is purchased but there is not enough installation space, it will be a big trouble.

4) The application environment of M8 connectors: The application environment determines the protection level of the M8 connectors we should choose. Some M8 connectors can only be used in ordinary environments, while other connectors can be used for high temperature difference, high humidity, vibration, corrosion and corrosion,different harsh environment.

5) The material and style of the M8 connector: if you need it with cable, you can choose the molded M8 connector. If you want to assemble it at your location, you should choose a plastic shell or a metal shell cable assembly M8 connector, and if for data transmission , do you needs to be shielded or not, if you need M8 socket,should be front panel mount,back panel mount or PCB mount, should it  be straight or angled ?

CAZN has more than 10 years of experience in the production of M8 connectors, M8 adapters, and M8 cables.

 If you need to purchase M8 connectors, you can contact us directly.

Why choose CAZN M8 connectors?

There are many manufacturers of M8 connectors. Different manufacturers control the quality of products differently, and quality control involves many aspects，all aspects are very important. So what is a high-quality M8 connector? What are the benefits of CAZN’s M8 connector?

Generally, M8 connectors should have good performance for  temperature resistance, humidity resistance, salt spray resistance, vibration and shock resistance, such as following:

1) Temperature resistance of M8 connectors: The maximum working temperature of some customized M8 connectors is 200°C, and the minimum temperature is -65°C. When the M8 connector is working, under the action of the current, heat is generated at the contact point, resulting in temperature increase . Its operating temperature is equal to the sum of the ambient temperature and the temperature rise of the contact point. The M8 connector with high temperature resistance will have higher performance under high and low temperature, will not destroy the air tightness, and will not cause disconnection due to overheating.

2) Moisture resistance of the M8 connector: if the water vapor in the air enters the connector, it will affect the conductivity, and the corrosive gas formed by other elements in the air will corrode the shell of the connector. Relevant experiments should be carried out in an environment with relative humidity of 90%~95% and temperature of +40±20℃, and the test time is at least 96 hours. The alternating damp heat test has higher requirements on the performance of the connector.

3) Salt spray resistance of M8 connectors: In some industrial environments, there is water vapor and salt in the air, the metal shell and metal contacts of the connector are susceptible to corrosion, which will affects the physical and electrical properties of the connector. The salt spray test can help evaluate the ability of the connector to withstand this environment.

CAZN hangs the connector in a temperature-controlled test chamber, and sprays it with compressed air with a sodium chloride solution of a specified concentration to form a salt fog atmosphere, the exposure time is specified by internation standard, at least 48 hours.

4) Vibration resistance of M8 connectors: Vibration and shock resistance are very important for M8 connectors. In special application environments such as machinery and equipment, aerospace, and transportation, they will face strong vibrations.

Vibration can be a good test for robustness of the connector’s mechanical structure and electrical contact reliability. In international standards, there are clear test methods, the peak acceleration, duration and shock pulse waveform, and the time of electrical continuity should be specified in the shock test.

5) Environmental performance of M8 connectors: According to different application environments, CAZN M8 connectors also have good sealing (air leakage, liquid pressure), liquid immersion (the ability to resist deterioration of specific liquids), low air pressure tolerance and other properties.

What are the benefits of choosing CAZN as a supplier of M8 connectors?

M8 connector manufacturer – CAZN, with advanced equipment and instruments, fast delivery, very low product defect rate, when purchasing M8 connectors, we should choose a waterproof connector manufacturer like CAZN.

1) Quality assurance from M8 connector manufacturers: high-precision machinery and equipment, strict quality management system, reduce the defective rate of products.

2) M8 connector manufacturers have favorable prices: mass-scale production greatly increases production efficiency, reduces unnecessary waste, and reduces procurement costs. The price will be more competitive, and price is always related with the quantity.

3) Delivery guarantee from M8 connector manufacturers: massive assembled connectors stock , overmolded connector materials stock , efficient and experienced workers, and advanced manufacturing equipment, all guranteed good delivery time .

4) Product compatibility

CAZN connectors are compatible with big national brands such as binder, phoenix, TE, the same quality, one third of the price

For M8 connectors, for end customers or wholesalers of M8 connectors , they care the quality, price and delivery time most . CAZN has imported a variety of advanced equipment and instruments to improve product processing accuracy and production efficiency. It help meets higher level of quality requirements of customers, further shortens the delivery time, and help customers buy better quality products with less cost .