M8 vs M12 Connectors 2,3,4,5,6Pin,What is Difference?Shine Industry
What is an M8 connector
M8 connectors are also called sensor connectors, because they are usually used to connect industrial sensors. There are molded ones with cables and assembled ones without cables. They can be equipped with 2 different locking nuts, which support 4-6mm cables or 6-10mm respectively. The length of the cable can be 1 meter, 2 meters, 3 meters, 5 meters, or customized according to customer requirements. The M8 waterproof connector has two options for male or female. The thread from male and female locking nut push the rubber ring to make it waterproof, and the protection level reaches IP67. It is suitable for harsh industrial and outdoor environments.
5 Important Things Need to Know Before Purchasing M8 Connectors
1）How to connect the M8 connector：First of all, we need to make sure: whether the M8 plug is connected to the M8 socket of the front or back mount, or use two M8 plug connector to connect cables, or the M8 plug is connected to the socket on the PCB.
2) Electrical parameters of the M8 connector: The current-carrying capacity of the M8 connector is very important, and will determine the application it suits. Due to the small size of the M8 connector, more pins, the smaller of the current-carrying capacity. Usually, The 3-pin M8 connector has a higher current rating than the 8-pin M8 connector. If the rated current of the M8 connector does not meet the requirements, then you need to choose a bigger size connector, such as the M12 connector. The M8 connector is more suitable for applicaitons with small current and size requirements
3）The size requirements of the M8 connector in the installation environment: whether the M8 connector can be used, depends on the installation space, if the height is enough, and if the width is enough, straight or angled type will be used accord to the space, if the space is too small,then we have to consider much smaller connector.
4）Different environments have different requirements for M8 connectors: some M8 connectors are not designed waterproof, vibration-proof or corrosion-proof, so they cannot be used in harsh environments. For example, snap in M8 connectors are not suitable for severe vibration or in applications with high waterproof requirements, in very harsh environments, metal connectors will perform better than plastic connectors.
5）Service life of the M8 connector: After being installed on the device, some connectors may not change or disconnect for a long time. If they work in a long-term water, gasoline or vibration environment, will these affect the protection level of the connector? Whether the reliability of the device connection will be affected because the design life of the connector does not meet the requirements, these are issues that need to be considered.
What is M12 connector ？
The M12 connector is also called circular cable connector with locking thread 12mm, and it can at least reach IP65 protection level to prevent liquid or dust from affecting the reliability of the connection. M12 connectors are widely used in connection solutions for sensors, actuators, and industrial Ethernet and fieldbus devices, and can be used in harsh environments and even corrosive environments in industrial automation.
As the most popular and classic connector, the M12 connector has been used in automation for a long time. It was originally a 3-pin or 4-pin connector, which evolved from the RK30 connector. It is not as good as the RK30 in terms of electrical performance. , but the protection level is much better, which can reach IP67 waterproof. 4-pin M12 connector outlet to meet the needs of more complex industrial sensors. Because the design of the M12 connector is so classic and loved by the majority of engineers, the M12 connector has been continuously developed into 5-pin, 8-pin, 12-pin and 17-pin, as well as a wealth of locking methods and coding types, further expanding the application in industrial automation.。
The differences between M12 and M8 connector
The standard thread of the M12 connector is M12*1. The reliable protection of the connection is achieved by locking the male plug or socket with the thread of the female plug or socket. The protection level reaches IP67 which suit for harsh industry application, usually have 2pin 3pin 4pin 5pin 6pin 8pin 12pin 17pin male connector or female connector, the plug and socket can be straight or angled. M12 connectors have 2 types , injection-molded with cable, or assembled type without cable. PVC material for the cable is used mostly , and for some with higher requirements will choose PUR (oil-resistant and wear-resistant) material.The length of the cable is made accord to customer requirements. Some applications for signal or data transmission with high requirements will require shielding. If the requirements are not high, you can also choose unshielded M12 connector.
The M8 connector is smaller than the M12 connector. It uses an 8mm thread. The male and female are also connected by tighten the thread to achieve the waterproof function. The highest protection level can reach IP67, and there are also conventional IP65 protection levels. Usually there are 2pin, 3pin, 4pin, 5pin and 8pin M8 connectors. The plug and socket are available in straight or right angeld type. There are also PCB type sockets. Fast and convenient for on-site maintenance. The cable material of the molded M8 connector is also made of conventional PVC material and PUR material with better oil resistance.
1) Different sizes, M12 connector is bigger than M8 connector, M8 connector have male or female 3-pin 4-pin 5-pin 6-pin 8-pin for option; M12 connector has male or female 2-pin 3-pin 4-pin 5-pin 6-pin 8-pin 12-pin 17-pin,M12 connector have more pin options.
2) Their thread is not the same: M12 connector has M12*1 thread, M8 connector has thread M8*1.
Same point: Both are circular waterproof connector that can be straight or angled,which can be plug or socket,all have cable assembly type without cables and molded ones with cables,all have PVC PUR material cable for option.
The application fields of M5 and M8 are very similar, and they had been widely used in the field of automation, such as equipments, instrumentation, electrical systems, sensors, actuators, etc.
M5 and M8 connectors are designed for harsh industrial environment applications, so they both have a very high level of protection class.
The M8 and M12 connectors produced from different manufacturers looks very similar,but materials, electrical performance, protection class can be big difference,even some products cannot meet the requirements of industrial application. Users should choose the ones with good reputation, rich experience in the industry, and large scale, famous brand connector manufacturers, this will reduce failure rates and reduce maintenance costs
Tips to Choose M12 Connector 2 3 4 5 6 8 12 17 Pin
1）First the user should confirm the application requirement and choose the suitable model. M12 connectors are available in many different models, coding types, and are designed to suit different application environments from the very beginning. Therefore, in the selection process, it is necessary to compare the parameters of different M12 connectors, confirm the current, waterproof level, coding type, number of cores, installation space and other information, and finally make a reasonable choice according to the environment and application requirements.
2）Choose a manufacturer with more influence and strength. Although have same industry standard, different manufacturers will have different quality implementation standards during production. Under normal circumstances, manufacturers with brand influence tend to have a lower defective rate. In the selection process, the user must take into account the product differences brought by different manufacturers and brands, fully consider various factors such as price and risk, and make a comprehensive evaluation to make a choice.。
3）Materials of the M12 4pin 8pin cable connector, the material is very important to realize the technical parameters and protection level of the connector, such as contact pins normally are gold plated brass, brass have very good electrical performance, but it is easily oxidized in the air, gold plated process ensures the conductivity while avoiding oxidation, and the size and contact area of the pins will affect the current carrying capacity, the material of the connector shell will affect the protection performance in harsh application environments, the accuracy,size error, will also affect the protection level
4）Stability of data, power or signal transmission. The M12 connector itself is a connecting device. If the signal or power transmission is unstable, or the carrying capacity is insufficient, it will cause problems in the entire system. The main things to consider here are the current carrying capacity, shielding function, and protection level, such as data and signal transmission must have a shielding function, otherwise the signal will be interfered, and the power transmission must consider the current carrying capacity, otherwise the equipment will not operate normally, and the anti-vibration function must be considered in the vibration environment, and the vibration may cause the connection to be interrupted.
5）The failure rate of the M12 connector. Because the connector is a very small part of the automatic control system, it only serves as a connection and is not the core component of the system. However, because of a small component, the whole system will have problems and affect the production operation, which is very worthwhile. , so be sure to choose high-quality products with low failure rate。
6）Comparison of waterproof performance. In outdoor and industrial environments, various factors such as water vapor, oil pollution, high temperature, acid and alkali may affect the reliability of the connection. If sufficient possible protection is not achieved, water and gasoline pollution will enter the connector and damage the contact. The connection will be unstable or interrupted.
Y type M12 connector 4 pin 5 pin application and selection
The 4-pin 5-pin M12 Y-type connector ensures a fast and stable connection between modular design machines and equipment, and also provides a reliable guarantee for the transmission of signals and power.
Y-type 4-pin 5-pin M12 connector is suitable for complex and harsh application environments, such as high and low temperature and temperature changes, high humidity, high air pressure, radiation, and other harsh natural environments, and can work in the temperature range of -55℃~125℃ , too high temperature may cause deformation of the shell of the connector and affect the sealing of the connection. Too low temperature, such as in cold storage, may cause the housing to shrink, crack, the contact pin will be exposed to the air and lose its protection.
Connectors that work in too harsh temperature environments should choose metal connectors, which are more resistant to temperature changes, because the temperature resistance of metal, thermal expansion and contraction performance are better than plastic. If it is used around the ocean or underwater, it is necessary to apply anti-corrosion raw materials and surface treatment. The chlorine element in seawater has a strong corrosive ability.
Applied in automation equipment, the reliable and fast connection method can reduce maintenance and production costs. For some final users, they are not very professional in technology, simple and convenient installation can reduce the dependence on manufacturers and solve some problems quickly.
Difference of M12 connector plug and M12 connector socket
M12 aviation plug usually refers to the M12 connector made of metal, which has better protection performance and stability
The difference between the M12 aviation plug and the M12 aviation socket is that，the plug is generally installed at the end of cable. outside of the equipment, there can be male or female plugs, which are used to insert into the socket. They are generally assembly type, and the cable can be installed by the manufacturer or the user. The M12 aviation socket is generally installed on the surface of the equipment, and the connection between the contact and the internal devices is inside the equipment. The M12 aviation plug can be installed on the socket, to achieve waterproof connection between the equipment and other equipment or power supply. The M12 aviation socket also have male and female type.
M12 aviation plug application:
M12 aviation plug was originally developed for aerospace, used in aircraft, rockets, missiles and other products, also known as military plugs, cable connectors. There are different options for the number of cores, as well as different sizes. M12 aviation plugs are basically metal shells, most of which are made of hard magnesium aluminum alloy materials. The plug and socket are locked by threads, and the rubber ring between the plug and socket is used to achieve waterproof, stable and reliable.
Widely used in military, aerospace, electric power and other fields.
M12 aviation socket application:
The M12 aviation socket is also called the M12 connector, which is used to connect the aviation plug. It is usually front panel mount or back mount mount. Usually, the electrical connection space for the M12 aviation socket is airtight and waterproof, mainly used for signal transmission and connection. The connection methods can be push-pull self-locking and threaded screw connection, the protection grades are IP44 IP55 IP65 IP67 IP68 IP69K, the higher of the protection grade, the better the waterproof performance. It is generally used in various communication equipment and instruments.
Both M12 aviation plugs and M12 aviation sockets belong to electrical connectors, but the names are different. They are both used to ensure the waterproof transmission of electrical and signals. Some devices require many core cable connections,the M12 aviation socket and plug improves the security, reliability and convenience of the connection.