xPHOENIXCONTACT electrical components Germany xPHOENIXCONTACT model xPHOENIXCONTACT price

xPHOENIXCONTACT electrical components are fuses that can be operated multiple times, known in Japan as permanent fuses. Immediately after interrupting an overload or short-circuit current, the fusible element automatically restores to its original state. The housing is made of austenitic stainless steel, with a beryllium oxide ceramic core embedded in the center. The space between the stainless steel and the ceramic core is filled with glass to seal and secure the ceramic core. The fine pores of the ceramic core are filled with metallic sodium as the fusible element, and the void behind the piston is charged with argon gas to compress the metallic sodium. Under normal operating conditions, current can enter from the lead terminal A, pass through the metallic sodium in the fine pores of the ceramic core, conduct to the stainless steel housing, and exit via the output terminal B. When a short-circuit current passes through the fuse, it rapidly heats the metallic sodium in the fine pores of the ceramic core, causing it to change from a solid to a high-temperature, high-pressure plasma vapor. This rapidly increases resistivity, providing strong current-limiting action against the short-circuit current and interrupting the current instantly. When the interruption is complete, the sodium vapor immediately returns to liquid and solid states, while the argon gas pushes the piston again to compress the metallic sodium, re-establishing the circuit connection.

xPHOENIXCONTACT electrical component applications

Thermistors can also be used as electronic circuit components for temperature compensation in instrument circuits and cold-junction temperature compensation for thermocouples. Utilizing the self-heating characteristics of NTC thermistors enables automatic gain control, forming RC oscillator amplitude-stabilization circuits, delay circuits, and protection circuits. When the self-heating temperature is significantly higher than the ambient temperature, the resistance is also related to the heat dissipation conditions of the environment. Therefore, this characteristic of thermistors is often utilized in anemometers, flow meters, gas analyzers, and thermal conductivity analysis to create specialized sensing elements. PTC thermistors are mainly used for overheat protection of electrical equipment, contactless relays, constant temperature control, automatic gain control, motor starting, time delay, automatic degaussing in color televisions, fire alarms, and temperature compensation. Main disadvantages: (1) the relationship between resistance and temperature is highly nonlinear; (2) poor consistency and interchangeability of components; (3) components are prone to aging and have relatively poor stability; (4) except for special high-temperature thermistors, most thermistors are only suitable for the range of 0 to 154 °C, which must be noted during use.

xPHOENIXCONTACT electrical component structure

A generator typically consists of components such as the stator, rotor, end covers, and bearings. The stator is composed of the stator core, windings, frame, and other structural parts that secure these components. The rotor consists of the rotor core (or magnetic poles, yoke), windings, retaining rings, centering rings, slip rings, fan, and shaft. The bearings and end covers connect and assemble the stator and rotor of the generator, allowing the rotor to rotate within the stator. This motion cuts magnetic flux lines, thereby generating induced electromotive force, which is led out through terminal blocks and connected to the circuit to produce current.

xPHOENIXCONTACT electrical component classification

Classification by material: a, wire-wound resistors are formed by winding resistance wire. They are made by winding high-resistance alloy wire around an insulating skeleton, coated with a heat-resistant glaze insulation layer or insulating varnish. Wire-wound resistors have a low temperature coefficient, high resistance accuracy, good stability, heat resistance, and corrosion resistance, making them primarily suitable for precision high-power applications. Their disadvantages include poor high-frequency performance and a large time constant. b, carbon composition resistors are made by pressing carbon and synthetic plastic together. c, carbon film resistors are made by depositing a layer of carbon on a ceramic tube, specifically by depositing crystalline carbon onto a ceramic rod skeleton. Carbon film resistors are low-cost, stable, offer a wide resistance range, and have low temperature and voltage coefficients, making them the most widely used resistors currently. d, metal film resistors are made by depositing a layer of metal on a ceramic tube, using vacuum evaporation to deposit alloy materials onto the surface of a ceramic rod skeleton. Metal film resistors offer higher accuracy, better stability, lower noise, and a smaller temperature coefficient compared to carbon film resistors. They are extensively used in instruments and communication equipment. e, metal oxide film resistors are made by depositing a layer of tin oxide on a ceramic tube, forming a layer of metal oxide on an insulating rod. Since they are oxides themselves, they are stable at high temperatures, resistant to thermal shock, and have strong load capacity. Classified by application, types include general-purpose, precision, high-frequency, high-voltage, high-resistance, high-power, and resistor networks.

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