FLEXNET electrical components Germany FLEXNET model FLEXNET price

FLEXNET electrical components are semiconductor transistors, also known as bipolar junction transistors or crystal triodes, which are semiconductor devices that control current. Their function is to amplify weak signals into electrical signals with larger amplitudes, and they are also used as contactless switches. Transistors are one of the basic semiconductor components, have current amplification capabilities, and are core components of electronic circuits. A transistor is made by fabricating two closely spaced PN junctions on a single semiconductor substrate; these two PN junctions divide the entire semiconductor into three parts: the middle part is the base region, and the two side parts are the emitter region and the collector region. The arrangement types include PNP and NPN.

FLEXNET electrical component principle

The thermistor will remain in a non-tripped state for extended periods; when the ambient temperature and current are in the c region, the heat dissipation power of the thermistor is close to its heat generation power, so it may or may not trip. For a given ambient temperature, the tripping time of the thermistor decreases sharply as the current increases; at relatively higher ambient temperatures, the thermistor has a shorter tripping time and lower holding current and tripping current. The PTC effect refers to a material exhibiting the PTC effect, i.e., the positive temperature coefficient effect, which means that the electrical resistance of the material increases with rising temperature. For example, most metallic materials exhibit the PTC effect. In these materials, the PTC effect manifests as a linear increase in resistance with increasing temperature, which is commonly referred to as the linear PTC effect. Nonlinear PTC effect: Materials undergoing a phase transition exhibit a phenomenon where resistance increases sharply by several to more than ten orders of magnitude over a narrow temperature range, known as the nonlinear PTC effect. Many types of conductive polymers exhibit this effect, such as polymer PTC thermistors. These conductive polymers are very useful for manufacturing overcurrent protection devices. Polymer PTC thermistors are used for overcurrent protection and are often referred to as resettable fuses (hereinafter referred to as thermistors). Due to their unique positive temperature coefficient resistance characteristics, they are highly suitable as overcurrent protection devices. The method of using a thermistor is similar to that of a conventional fuse: it is connected in series in the circuit. When the circuit operates normally, the thermistor's temperature is close to room temperature and its resistance is very low, so connecting it in series does not hinder current flow. However, when an overcurrent occurs due to a fault, the increased heat generation causes the thermistor's temperature to rise. When the temperature exceeds the switching temperature, the resistance increases dramatically, rapidly reducing the current in the circuit to a safe value. After the thermistor trips, the current in the circuit drops significantly; t is the tripping time of the thermistor. Because polymer PTC thermistors offer good design flexibility, their temperature sensitivity can be adjusted by changing their switching temperature (ts), allowing them to provide both overtemperature and overcurrent protection. They are suitable for overcurrent and overtemperature protection of lithium-ion and nickel-metal hydride batteries. Influence of ambient temperature on polymer PTC thermistors: A polymer PTC thermistor is a direct-heating, step-type thermistor. Its resistance change process is related to its own heat generation and dissipation conditions; therefore, its holding current, tripping current, and tripping time are influenced by ambient temperature.

FLEXNET electrical component classification

Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single-strand or multi-strand conductors and insulation layers, used to connect circuits, electrical appliances, etc. Cables can be divided into DC cables and AC cables according to the photovoltaic power station system, and are classified into DC cables and AC cables based on usage and operating environment.

FLEXNET electrical component principle

The structure of a mercury switch is very simple. The exterior is a sealed cylindrical insulating housing containing approximately one-fifth mercury. Two wires leading out from the inside are fixed at one end of the housing. This constitutes a mercury switch. Due to gravity, the mercury bead flows to the lower part of the container. If it simultaneously contacts both electrodes, the switch closes the circuit, turning the switch on. The shape of the container also affects the conditions under which the mercury bead contacts the electrodes.

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