ESYLUX electrical components Germany ESYLUX model ESYLUX price

ESYLUX electrical components are tools that can accurately determine and measure temperature, divided into pointer thermometers and digital thermometers. Depending on the temperature-sensing substance used and the temperature measurement range, there are kerosene thermometers, alcohol thermometers, mercury thermometers, gas thermometers, resistance thermometers, thermocouple thermometers, radiation thermometers and optical pyrometers, bimetallic thermometers, etc. Digital thermometers can accurately determine and measure temperature, displaying it digitally rather than with a pointer or mercury. Hence they are called digital thermometers or digital temperature gauges.

ESYLUX electrical component principle

The main principle of a diode is to utilize the unidirectional conductivity of the PN junction; adding leads and encapsulation to the PN junction forms a diode. A crystal diode consists of a PN junction formed by P-type semiconductor and N-type semiconductor, where a space charge layer is formed on both sides of the interface, establishing a built-in electric field. When no external voltage is applied, the diffusion current caused by the carrier concentration difference across the PN junction equals the drift current caused by the built-in electric field, resulting in an electrical equilibrium state. When a forward voltage bias is applied externally, the mutual cancellation between the external electric field and the built-in electric field increases the carrier diffusion current, causing a forward current. When a reverse voltage bias is applied externally, the external electric field and the built-in electric field are further strengthened, forming a reverse saturation current within a certain reverse voltage range that is independent of the reverse bias voltage value. When the applied reverse voltage reaches a certain level, the electric field strength in the space charge layer of the PN junction reaches a critical value, triggering a carrier multiplication process that generates a large number of electron-hole pairs, resulting in a significant reverse breakdown current, known as the diode breakdown phenomenon. Reverse breakdown of the PN junction is classified into Zener breakdown and avalanche breakdown.

ESYLUX electrical component classification

Fiber optic connectors can be divided into common single-mode and multimode connectors for silica-based fibers based on the transmission medium, as well as other fiber optic connectors using plastic etc. as the transmission medium. Based on the connector structure, they can be classified into: FC, SC, ST, LC, D13, DIN, MU, MT, and various other forms. Among them, ST connectors are typically used at the cabling equipment end, such as fiber patch panels and fiber modules; while SC and MT connectors are typically used at the network equipment end. Based on the fiber end-face shape, they are classified into FC, PC (including SPC or UPC), and APC; based on the number of fiber cores, they are divided into single-core and multi-core (such as MT-RJ). Fiber optic connectors are widely used and come in many varieties. In practical applications, we generally distinguish them based on the different structures of the fiber optic connectors.

ESYLUX electrical component features

The characteristics of self-restoring fuses include high breaking current capacity, capable of interrupting AC and even higher currents. This type of fuse has a very significant current-limiting effect; when the instantaneous current approaches 166 kiloamperes, it can rapidly limit the current. The structure of a self-restoring fuse mainly consists of current terminals (also called electrodes), mica glass (filler), insulating tube, fusible element, piston, argon gas, and housing. The housing of the self-restoring fuse is generally made of stainless steel, with the stainless steel sleeve separated from the internal beryllium oxide ceramic insulating tube by mica glass, which serves as both filler and insulator. Self-restoring fuses operate based on the characteristic of sodium metal whose resistance increases sharply at high temperatures. Under normal operating conditions, current flows from the left current terminal, through the sodium metal fusible element in the fine holes of the beryllium oxide ceramic insulating tube, to the right current terminal, forming a current path. When a short-circuit fault occurs, the short-circuit current heats the sodium metal, vaporizing it into a high-temperature, high-pressure plasma state, which sharply increases its resistance, thereby achieving current limiting. At this point, the high pressure generated by the vaporized fusible element pushes the piston to the right, compressing the argon gas. After the circuit breaker interrupts the short-circuit current limited by the self-restoring fuse, the temperature of the sodium vapor drops, and the pressure decreases accordingly. The previously compressed argon gas condenses back into liquid and solid states, and its resistance value decreases to the original value, allowing for reuse. Regarding the wiring of self-restoring fuses, they are often used in series with circuit breakers, with an additional resistor connected in parallel to suppress overvoltage during interruption. During normal operation, the self-restoring fuse is in a low-resistance state, and only a small current flows through the parallel resistor. When a fault occurs in the line, the self-restoring fuse enters a high-resistance state, and the parallel resistor absorbs the generated overvoltage and maintains the operating current required for the circuit breaker trip unit, ensuring reliable interruption by the circuit breaker. Therefore, the current interrupted by the circuit breaker is actually the current-limited current of the self-restoring fuse.

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