German UWE-BRAUN plug UWE-BRAUN model UWE-BRAUN price

UWE-BRAUN plug terminal blocks, as a type of connector, are important components in the electrical industry, playing an irreplaceable and significant role. Since engineering technicians start troubleshooting by checking interfaces, i.e., terminals, the design of terminal blocks is particularly important. Terminal blocks can be classified into: European-style terminal block series, pluggable terminal block series, transformer terminal blocks, building wiring terminals, barrier-type terminal blocks, spring-type terminal blocks, DIN rail-mounted terminal blocks, wall-through terminal blocks, and optocoupler-type terminal blocks. The plastic insulation materials and conductive parts of terminal blocks directly affect their quality, determining their insulation performance and conductivity respectively.

UWE-BRAUN plug applications

Mainly used in lighting, communications, security, and other industries. Pluggable terminals have the widest range of applications, such as in variable frequency drives, explosion-proof equipment, CNC panels, access control controllers, sensors, PLC, instruments, power supplies, servo drives. The common requirements for pluggable terminals in these industries are: smooth insertion and extraction force, low contact resistance, and sufficient service life and fatigue resistance, which imposes high demands on the metal spring clip materials. This requires product designers to have considerable experience in structure and material selection. Barrier-type terminals are mainly used in: power supplies, relays (especially double-layer terminals), inverters, elevator industry (less common), and air conditioning. Requirements for this series include high torque requirements for screws during wire clamping, the distance from the screw's highest position must be greater than the maximum wire clamping range, long-position terminals must not warp or deform, and screws must have high corrosion resistance.

UWE-BRAUN plug classification

1) By shape: circular electrical connectors, rectangular electrical connectors. Circular electrical connectors are most widely used in military equipment (aviation, aerospace) due to their structural characteristics. Rectangular electrical connectors, due to their simple structure, are more commonly used on printed circuit boards of electronic devices. 2) By structure: By connection method: threaded connection, bayonet (quick) connection, latch connection, push-pull connection, direct plug-in connection, etc.; By contact termination form: crimping, soldering, wire wrapping; screw (cap) fixation; By environmental protection: environmentally resistant electrical connectors and standard electrical connectors. 3) By application: RF electrical connectors, sealed electrical connectors (glass-to-metal seal), high-temperature electrical connectors, automatic disconnect/separation electrical connectors, filter electrical connectors, composite material electrical connectors, airport power electrical connectors, printed circuit board electrical connectors, etc.

UWE-BRAUN plug troubleshooting

During electrical assembly, it is often found that individual core crimped wires are not fully inserted, or cannot be locked after insertion, resulting in unreliable contact. The cause is analyzed to be burrs or dirt jamming at the threads of individual mounting holes. Especially when using factory-assembled plug sockets for the last few mounting holes, discovering this defect requires removing all previously crimped wires from other holes one by one and replacing the plug socket. Additionally, improper matching of wire diameter and crimp hole size, or errors in the crimping process, can lead to loose crimped ends. Therefore, manufacturers must perform a pass-through test on all mounting holes of sample plugs (sockets) before shipment, using loading/unloading tools to simulate inserting wires with pins or sockets to check if they can be locked. According to product technical specifications, pull-out force tests are conducted on each crimped wire. Without reliable terminal blocks, there is no reliable system engineering. Failure and reliability are two aspects of a contradictory entity that correspond to and interact with each other. Through reliability screening of terminal blocks, various failure modes and mechanisms are identified, providing valuable lessons and eliminating hidden dangers, offering a scientific basis for improving design, processes, inspection, and usage. It is also an important basis for revising and establishing technical conditions for terminal blocks. Finding measures to prevent failures and achieving the transformation from failure to reliability is the ultimate goal of failure analysis.

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