mayser electrical components Germany mayser model mayser price

mayser electrical components are energy conversion devices that convert sound signals into electrical signals. Categories include moving-coil, condenser, electret, and the recently emerging silicon microphones, as well as liquid microphones and laser microphones. Most microphones are electret condenser microphones, which operate using a polymer diaphragm with permanently isolated charge.

mayser electrical components types

Common thermocouples can be divided into two major categories: standard thermocouples and non-standard thermocouples. So-called standard thermocouples refer to thermocouples for which national standards specify the relationship between thermoelectric potential and temperature, allowable error, and have a unified standard indexing table; they have matching display instruments available for selection. Non-standardized thermocouples are inferior to standardized thermocouples in terms of usage range or magnitude, generally lack a unified indexing table, and are mainly used for measurements in certain special occasions. Theoretically, any two different conductors (or semiconductors) can be configured as a thermocouple, but as a practical temperature-measuring element, it has multiple requirements. To ensure reliability in engineering technology and sufficient measurement accuracy, not all materials can form thermocouples. The basic requirements for thermocouple electrode materials are generally: 1, stable thermoelectric properties within the temperature measurement range, not changing over time, sufficient physical and chemical stability, and resistance to oxidation or corrosion; 2, small temperature coefficient of resistance, high conductivity, and low specific heat; 3, large thermoelectric potential generated during temperature measurement, with a linear or near-linear single-valued functional relationship between thermoelectric potential and temperature; 12, good material reproducibility, high mechanical strength, simple manufacturing process, and low cost.

mayser electrical components structure

The structure and materials of new high-voltage Schottky diodes differ from those of traditional Schottky diodes. Traditional Schottky diodes are formed by metal-semiconductor contact. Metal materials such as aluminum, gold, molybdenum, nickel, and titanium can be selected, while the semiconductor is typically silicon or gallium arsenide. Since electrons have higher mobility than holes, to achieve good frequency characteristics, N-type semiconductor material is selected as the substrate. To reduce the junction capacitance of the Schottky diode and increase the reverse breakdown voltage without causing excessive series resistance, a high-resistance N- thin layer is usually epitaxially grown on an N+ substrate. As is known, there are a large number of conductive electrons inside metal conductors. When metal contacts a semiconductor (with the distance between them only on the order of atomic size), the Fermi level of the metal is lower than that of the semiconductor. At the sub-levels corresponding to the conduction band of the semiconductor inside the metal, the electron density is lower than the electron density in the conduction band of the semiconductor. Therefore, after contact, electrons diffuse from the semiconductor to the metal, causing the metal to become negatively charged and the semiconductor positively charged. Since metal is an ideal conductor, negative charge is distributed only within a thin layer on the surface with atomic-scale thickness. For N-type semiconductors, donor impurity atoms that lose electrons become positive ions and are distributed over a larger thickness. The result of electron diffusion from the semiconductor to the metal forms a space charge region, a built-in electric field, and a barrier, with the depletion layer existing only on the N-type semiconductor side (the barrier region falls entirely on the semiconductor side). The direction of the built-in electric field in the barrier region points from the N-type region to the metal. As thermionic emission increases the built-in field, the drift current opposite to the diffusion current increases, finally reaching dynamic equilibrium and forming a contact barrier between the metal and the semiconductor, known as the Schottky barrier. When the external voltage is zero, the electron diffusion current equals the reverse drift current, achieving dynamic equilibrium. When forward bias is applied (i.e., positive voltage to the metal and negative voltage to the semiconductor), the built-in field is weakened, the barrier on the semiconductor side is lowered, thus forming a forward current from the metal to the semiconductor. When reverse bias is applied, the built-in field is strengthened, the barrier height increases, forming a smaller reverse current from the semiconductor to the metal. Therefore, SBD, like PN junction diodes, is a nonlinear device with unidirectional conductivity.

mayser electrical components parameters

Rated voltage: refers to the safe voltage allowed when the switch is operating normally. If the voltage applied across the switch exceeds this value, it will cause arcing and breakdown between the two contacts. Rated current: refers to the maximum safe current allowed to pass when the switch is closed. If this value is exceeded, the switch contacts will burn out due to excessive current. Insulation resistance: refers to the resistance value between the conductive part and the insulating part of the switch. Contact resistance: refers to the resistance value between each pair of contacts when the switch is in the closed state. Withstand voltage: refers to the highest voltage the switch can withstand between the conductor and ground. Life: refers to the number of operations the switch can perform under normal working conditions.

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