There are always many connection points on electrical lines

Some electrical installation workers often do not pay attention to the installation quality when laying wires: no bushing is installed where insulating sleeves should be used; junction boxes are not installed where junction boxes should be used; even splicing is not used at wire joints , But the illegal hook connection method.

The contact resistance of this hook-like connection method is very large, and the continuous heating when the power is turned on will gradually dry and carbonize the nearby wooden boards, and finally burn and cause a fire. 1. Reasons for accidents at joints There are always many connection points on electrical lines. Such as wires and wires, wires and switches, wires and electrical appliances wiring pile heads, wires and protection device connection points, etc.

These joint parts are different from other parts of the wire. 1. Prone to touch wires. Wires generally have insulation protection. As long as the insulation is not damaged, even if the two wires touch, there will be no problems. At the joint, the insulating layer is stripped off. If the wrapping cloth is not properly wrapped and the two wires collide, it may cause a short circuit, heat generation or electric spark. 2. It is easy to generate heat due to excessive contact resistance.

If Box header Factory measures are taken at the joints in time, it cannot be ‘seamless’. If the contact area is smaller than the conductor cross-sectional area, according to the inverse ratio of resistance and conductive area, it can be known that the smaller the contact area of the connection point, the greater the resistance; the greater the resistance, the easier it is to generate heat. Therefore, the joint is always easier to heat than other parts of the conductor. If the quality of the joint is good, the heat generated is not large, the heat dissipation condition is good, the heat is quickly dissipated, and the temperature of the connection point will not rise too high and cause an accident.

3.81mm Female Pluggable Terminal Block | China Plug-In Terminal Blocks Manufacturers

Test standard IEC/ EN61984 : 2009 1 UL1059
Pitch 3.5/3.81
Poles 02-24P
EN61984 Test data UL certificate NO:E482989
Rated insulation voltage 250
Rated current [A] 7
Rated connection capacity solid/stranded [mm] 1.5
Surge voltage category/pollution degree/material group ||/2/|
Rated impulse voltage [KV] 2.5
Rated torque 0.2
UL1059Test data UL File Number E228872
Use group B C D
Voltage 300 / 300
Current 8 / 8
Rated connection capacity (solid/stranded) [AWG] 28-16
Rated torque 1.77
General data /
Screw M2
Infiammability class UL94 V-0

3.81mm Female Pluggable Terminal Block
Ambient temperature [°C] -40~+105
Relative humidity 5%-95%
Inspection standard MIL -STD-105E II
AQL 0.65
Warranty 12 months
Material and plating /
Housing PA66
Screws CSteel , Zn plated
Contact Copper aly , Sn plated
Cage Copper aloy , Ni plated
Wire connecting
Recommended stripping length 6-7mm;

For the finished products,China Plug-In Terminal Blocks Manufacturers will do 100% inspection according to the customers’ requirements and the international standard. Secondly,we have our own testing lab and the advanced and complete inspection equipment in the casting industry,including Spectrometer, Metallographic Microscope, Tension Tester, Low Temperature Tester, X-ray Tester, MPT, UT, CMM, Video Measurement Machine and so on.With these advanced facilities & instruments, we are able to supply the precise finished products to our customers, and make products meeting their overall inspection requirements on chemical composition, mechanical properties, non-destructive testing and high precise dimensional inspections.

The USB will enter a suspend mode when there is no data

The previous article Wholesale DIN 41612 Connectors provides more detailed information, and also provides the OVLO and UVLO parameter values compatible with the wall adapter power supply. Figure 4: The soft-start process of the OVP device that overcomes the surge Even if the Vusb or wall adapter rapid output rise (hot plug) occurs, no voltage spike is observed at the Vout end of the device, thanks to the 4ms soft-start control. In order to save power,

the USB will enter a suspend mode when there is no data traffic. OVP devices are needed to overcome this problem. In order to provide a higher level of protection, overcurrent protection (OCP) features can be added to these devices.675V, which can effectively protect the downstream system to withstand a voltage of 6V, and the Vusb ripple voltage can reach 5. The typical value of 700ns/maximum value of 1.

The OVLO level must be higher than the maximum operating output voltage of Vbus (5.25V. This special sequence runs through the gradual ascent of the PFet gate, see Figure 4. A 1μF ceramic capacitor is enough to solve this problem. How to design the USB current capability is 100mA in normal mode (unconfigured mode), but up to 500mA in configured mode. Electrical characteristics and protective measures

Downstream systems connected via USB can be powered by multiple types of hosts. When the Vbus power supply is used to charge the lithium-ion battery (in most cases, the maximum rated voltage is The voltage is 7V or 10V) can also be connected to the input pin of the charger. Figure 5: NCP360 has a very fast turn-off time. When connecting a standard USB source device such as a personal computer (PC),

The dual-pole design allows multiple connectors to be on

Fourth: Robust wholesale DIP Switches In the ERNI connector series, the double-pole design idea is consistent throughout. It is suitable for the design of monitors and LED lights. The positive lock is designed for strong vibration applications. If the welding bracket, the hole (microhole) of the surface mount pin, and the large solder pad are superimposed, the holding force can be improved. Incorrect selection and use of connectors can cause system failures, product recalls, product liability cases, circuit board damage, rework and repairs, which in turn will cause loss of sales and customers.

The dual-pole design allows multiple connectors to be on one circuit board without plugging or short circuit problems, and there is no need for a large number of signals on a single connector. Product design engineers not only need to pay attention to chip technology, but also need to pay attention to the selection of peripheral devices, so as to get the best performance of the system. Especially suitable for inkjet printer controller, Interface Module module interface, etc. Obviously, the importance of choosing a suitable connector for electronic devices. For SMT products,

it is generally believed that the holding power on the board is poor. With the miniaturization of automotive electronics and consumer electronics, the design concept of high current and small spacing needs to be considered. Second: No bent pin design during assembly. Third: Surface mount design with high retention force. ERNI uses direct stamping of the corners, stamping terminals can avoid capillary cracks caused by the bending process, and ensure a complete electromechanical connection. For example, in the design of X-ray machines, ultrasonic scanners, and robotic Ethernet switches

. The 100% surface mount pin coplanarity test ensures the reliability of the circuit board assembly process, ensures good soldering, improves the product quality rate, and reduces the cost. This can be vividly compared to ‘take roots’. Is the retention force of PCB with surface mount termination lower than that of through-hole termination? The answer is: not necessarily. It is very suitable for automotive and subway applications.

It is particularly urgent to effectively carry out the reliability

Before connecting, check DIN 41612 Connectors Factorythere is any excess, whether there is rusty outer casing, abnormal pinhole, inflexible locking mechanism, etc. Reliability analysis of aerospace electrical connectors The reliability of electrical connectors includes inherent reliability and reliability in use.

Therefore, it is particularly urgent to effectively carry out the reliability analysis of electrical connectors in the design work of aerospace products to improve the quality of aerospace products. ⑿ The appropriate quality level should be selected according to the role and position in the complete machine system. Carrying out the reliability analysis of aerospace electrical connectors plays a pivotal role in identifying and eliminating potential quality defects of aerospace products. 5.

References: [1] Yang Fenwei. ②Structure type The structure type is an important factor that determines the reliability of the product. When performing performance tests on electrical connectors, you should use qualified and new plugs (seats) or analog pins. ⑩The form of tail attachment. A failure of a contact will result in the failure of the entire weapon system. Prevent accidents such as false welding, false pressure, end connection falling off, fracture and pollution. λp=λb×πE×πP×N λcyc(3) where:

N—the number of working pins. 2. Measures to ensure the reliability of aerospace electrical connectors 1. λp=λb×πE×πQ×πP×πK×πC where: λp—working failure rate; λb—basic failure rate; πE—environmental coefficient; πQ—quality coefficient; πP—contact coefficient; πK—plugging coefficient; πC-jack structure coefficient. 4., are critical to the inherent reliability of the product important. between contacts and between contacts and shell. The overall electrical connector failure statistics account for a large proportion. Reasonably select the quality level. ⑾ Overall dimensions. Reliability prediction of aerospace electrical connectors. Inherent Reliability

The lighting industry is growing and developing very fast

Molex wire harnesses cooperate with its connector products to provide a total interconnection solution to meet customers’ cost and performance requirements. According to our core capabilities, from components to fully integrated value-added solutions, you can also achieve faster time to market and cost competitive advantages.049”) pitch system is designed for high-density wiring harness applications • Provides 1.

It is estimated that residential, commercial and industrial lighting account for approximately 20% of the world’s energy consumption. Although the operating temperature of the LED lamp is lower than that of the incandescent fluorescent lamp to a certain extent, its effective life will be greatly reduced without a suitable heat dissipation solution.

The lighting industry is growing and developing very fast. From street lights to large screens, solid-state lighting systems provide compelling benefits and have begun to change the industry. It is very suitable for high-power LED lighting equipment, which generates a lot of heat, and then needs to be effectively dissipated in order to maximize the life of the LED. · From simple jumpers to more A collection of high-frequency signals, higher speeds and larger currents. However, there are some technical problems, and Molex has been able to provide solutions for them.

With a long PCB terminal blocks Factory of cooperation with leaders in the lighting industry, Molex is committed to innovative lighting solutions to provide customers with higher design flexibility and reduce processing costs.118”) pitch is suitable for confined space, current reaches 5.70 mm (.0A current the same as 2.0 ™• 3. ·Mechanical locking method ensures safe connection , And prevent accidental detachment. ·User-friendly terminal pulling and insertion, simplifying on-site maintenance.4 seconds when affected•Integrated cover, retaining wire, latch

Sockets with different functions focus on different test

Generally speaking, most desktop socket test procedures include three items: electrical performance testing, environmental performance testing, and mechanical performance testing.. Desktop sockets with different functions focus on different tests. Our test of the hidden desktop socket is to identify the performance of the hidden desktop socket and whether the product can meet the application requirements. So as to verify the effectiveness of the multimedia socket. Huashijia Audiovisual Equipment is a professional manufacturer of desktop sockets.

Vibration: It is determined that the hidden desktop socket may be affected by vibration in the main frequency band or random vibration frequency range and its amplitude during the life of the hidden desktop socket. At the same time, the hidden desktop socket test is also a continuation of the product design and development phase. Low-pressure immersion: Verify the sealing ability of a pair of plug-in concealed desktop socket assemblies from the desktop socket to the lead room and the interface seal against the simulated moisture condensate when and after a rapid drop from high altitude.

As a professional project designer, when designing or solving the problem of connecting these devices, various lines Cables are arranged in an orderly and reasonable manner. Fire protection: in order to determine the ability of the hidden desktop socket to withstand the flame after a certain period of time under the flame temperature specified by the special standard after the wire is connected and plugged in.

The Screw Terminal Blocks Manufacturers meet international standards and quality assurance. Mechanical performance test shock: to determine the suitability of the hidden desktop socket and its accessories to withstand the impact of rough work, transportation and military operations. Mechanical life: detection of the hidden desktop socket or the contact member being mated and separated Influence, the separation of this mating is to simulate the mechanical life of the hidden desktop socket. Hidden desktop socket test items, test methods and recognized judgment standards are all related to the use requirements or market requirements that the hidden desktop socket design must meet.

Low temperature generally needs to pass a low temperature test

The so-called connection mainly refers to whether the insertion force and withdrawal force of the part meet the standard. If the insertion force is too high, it will be difficult to insert, which is not only very inconvenient , And a long time will bring safety hazards to the entire machine. For the pull-out force, this one should be as large as possible, because if the pull-out force is too small, it is easy to cause falling off, which not only affects the service life of the connector, but also causes certain safety hazards to the entire machine.

For some connectors that work in special occasions, we must pay attention to their environmental performance, that is, the connector must be resistant to high and low temperatures, must be able to work under high humidity, and must be resistant to shock And the ability to squeeze or even shake. In terms of high and low temperature resistance, a good connector must work normally at a high temperature of more than 200 degrees, and its parts cannot be damaged due to the high temperature.

Low temperature generally needs to pass a low temperature test of minus 60 degrees Celsius. Because the working environment of the connector is not fixed, many devices have to work in special occasions, so this one has to be guarded. Humidity, as we all know, humidity will affect the insulation performance of the connector, so when designing the connector,

we must consider whether the PCB Connectors Suppliers of the environment will affect the connector, and rigorous experiments can be used to determine its performance. Another important indicator of the connector is its performance in earthquake resistance and impact resistance. This one is very obvious in aerospace, railway and road transportation. The connector must be strong and have a very good seismic effect. In some harsh environments, it can maintain normal work, and at the same time, it will not be damaged due to huge impact and affect the work of the machine.