ALG-Light LED electrical components Germany ALG-Light LED model ALG-Light LED price

ALG-Light LED electrical components are fuses that can be operated multiple times, known in Japan as permanent fuses. Immediately after interrupting 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. Glass filler between the stainless steel and the ceramic core provides sealing and reinforces the ceramic core. The fine pores in 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 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 output terminal B. When short-circuit current passes through the fuse, it rapidly heats the metallic sodium in the fine pores of the ceramic core, converting it from solid to high-temperature, high-pressure plasma vapor. This causes a rapid increase in resistivity, providing strong current-limiting action against the short-circuit current and interrupting the current instantly. At the end of the interruption, the metallic 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.

ALG-Light LED electrical component 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. Metals such as aluminum, gold, molybdenum, nickel, and titanium can be used, while the semiconductor is typically silicon or gallium arsenide. Since electrons have higher mobility than holes, N-type semiconductor material is selected as the substrate to achieve good frequency characteristics. 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. It is well known that metal conductors contain a large number of conduction electrons. When metal contacts a semiconductor (with a separation on the order of atomic size), the Fermi level of the metal is lower than that of the semiconductor. In the metal and at the energy levels corresponding to the semiconductor conduction band, the electron density is lower than that in the semiconductor conduction band. Therefore, upon 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, the negative charge is distributed only within a surface layer of atomic thickness. For N-type semiconductors, the donor impurity atoms that lose electrons become positive ions and are distributed over a greater thickness. The diffusion of electrons from the semiconductor to the metal results in the formation of a space charge region, a built-in electric field, and a barrier, with the depletion layer located only on the N-type semiconductor side (the entire barrier region falls on the semiconductor side). The direction of the built-in electric field in the barrier region is from the N-type region toward the metal. As thermionic emission increases the built-in field, the drift current, which is opposite to the diffusion current, increases until dynamic equilibrium is reached, 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 (positive voltage to the metal, negative voltage to the semiconductor), the built-in field is weakened, the barrier on the semiconductor side is lowered, and a forward current flows from the metal to the semiconductor. When reverse bias is applied, the built-in field is strengthened, the barrier height increases, and a small reverse current flows from the semiconductor to the metal. Therefore, like SBD-PN junction diodes, it is a nonlinear device with unidirectional conductivity.

ALG-Light LED electrical component principle

Microphones have evolved from initial resistive electro-acoustic conversion to inductive and capacitive conversion, with many new microphone technologies gradually developing, including aluminum ribbon and moving-coil microphones, as well as the currently widely used condenser and electret microphones. The working principle of a moving-coil microphone involves sound waves causing a diaphragm to vibrate through the air. The electromagnetic coil winding on the diaphragm and the magnet surrounding the moving-coil head create a magnetic field interaction, generating a weak fluctuating current. This current is transmitted to an amplifier, which converts the fluctuating current back into sound through the reverse process. In an aluminum ribbon microphone, the aluminum ribbon serves as both the microphone diaphragm and the conductor moving in the magnetic field. The aluminum ribbon is typically made of aluminum foil. To achieve an ideal resonant frequency, the aluminum ribbon is corrugated to maintain a precise tension value. As both conductor and diaphragm, the aluminum ribbon is suspended in the magnetic field between two magnetic pole faces, vibrating with the frequency of incident sound waves and generating a voltage output across its ends. A condenser microphone has two metal plates, one coated with an electret film and grounded, while the other is connected to the gate of a field-effect transistor (FET). A diode is connected between the gate and source. The diaphragm of a condenser microphone often uses fluorinated ethylene propylene (FEP), which offers good humidity performance, generates more surface charge, and is less affected by humidity. Since this transducer also has a capacitive structure with high internal signal impedance, a field-effect transistor must be used at the output to extract and amplify the voltage signal generated by sound.

ALG-Light LED electrical component types

1. Classification by mounting type: As thermocouples are a primary temperature measurement method with wide applications, there are various requirements for their mounting devices and technical performance. Therefore, thermocouple mounting devices are divided into six types: no mounting device, threaded, fixed flange, movable flange, movable flange angle form, and tapered protection tube. 6. Classification by assembly and structural style: Based on performance and structural style, thermocouples can be classified into detachable thermocouples, explosion-proof thermocouples, armored thermocouples, and spring-loaded fixed thermocouples for special applications.

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