TE Connectivity electrical components German TE Connectivity models TE Connectivity prices

TE Connectivity electrical components refer to an electrical device that disconnects the circuit by melting the fuse element with the heat generated by itself when the current exceeds a specified value. A fuse is a current protection device made based on the principle that when the current exceeds the specified value for a period of time, the heat generated by itself melts the fuse element, thereby disconnecting the circuit. Fuses are widely used in high and low voltage distribution systems, control systems, and electrical equipment as short-circuit and overcurrent protectors, making them one of the most commonly used protective devices. An electrical device that uses a metal conductor as the fuse element connected in series in the circuit; when overload or short-circuit current passes through the fuse element, it melts due to its own heating, thereby breaking the circuit. Fuses have a simple structure and are easy to use, and are widely used as protective devices in power systems, various electrical equipment, and household appliances.

TE Connectivity electrical component composition

A multimeter consists of three main parts: the meter head, the measurement circuit, and the selector switch. The multimeter is the most basic tool in the field of electronic testing and is also a widely used test instrument. Multimeters are also called multi-meters, triple-meters (A, V, Ω, i.e., current, voltage, and resistance), multiplexers, or universal meters. Multimeters are divided into analog multimeters and digital multimeters. There is also an oscilloscope multimeter with oscilloscope functions, which is a multifunctional, multi-range measuring instrument. General multimeters can measure DC current, DC voltage, AC voltage, resistance, and audio levels; some can also measure AC current, capacitance, inductance, temperature, and certain parameters of semiconductors (diodes, transistors). Digital multimeters have become mainstream and have replaced analog instruments. Compared with analog instruments, digital instruments offer higher sensitivity, higher accuracy, clearer display, stronger overload capacity, and are easier to carry and use.

TE Connectivity electrical component function

The modulated pulses generated by the oscillation circuit pass through the reflection circuit and are radiated as light pulses by the LED GL. When the measured object enters the effective range of the receiver, the reflected light pulses enter the phototransistor DU. In the receiving circuit, the light pulses are demodulated into electrical pulse signals, then amplified and synchronously gated and shaped by an amplifier, and then interference is excluded using digital integration or RC integration methods. Finally, the photoelectric switch control signal is output by the driver after a delay (or without delay). Photoelectric switches generally have good hysteresis characteristics, so even if the detected object shakes within a small range, it will not affect the output status of the driver, thereby keeping it in a stable operating zone. At the same time, the self-diagnosis system can display the light-receiving status and the stable operating zone to monitor the work of the photoelectric switch at any time. Proximity switches are widely used in aviation, aerospace technology, and industrial production. They are also used in daily life, such as in automatic doors in hotels, restaurants, and garages, and in automatic hot air blowers. In terms of security and anti-theft, important places such as archives, finance departments, banks, museums, and vaults are usually equipped with anti-theft devices composed of various proximity switches. In measurement technology, such as length and position measurement; in control technology, such as displacement, speed, and acceleration measurement and control, a large number of proximity switches are also used.

TE Connectivity electrical component applications

The collector-emitter current can be considered as being controlled by the base-emitter current, which is equivalent to viewing the bipolar transistor as a "current-controlled" device. It can also be viewed as being controlled by the emitter-base junction voltage, i.e., as a "voltage-controlled" device. In fact, these two ways of thinking are interconnected through the current-voltage relationship across the base-emitter junction, which can be represented by the current-voltage curve of the PN junction. In analog circuit design, the current-controlled viewpoint is sometimes adopted because, within a certain range, the bipolar transistor has approximately linear characteristics. In this range (referred to below as the "active region"), the collector current is approximately equal to a multiple of the base current, which greatly facilitates problem analysis and control of circuit functions. When designing some basic circuits, people assume that the emitter-base voltage is an approximately constant value, at which point the collector current is approximately equal to several times the base current, and the transistor acts as a current amplifier. However, in reality, the bipolar transistor is a more complex nonlinear device, and improper bias voltage allocation will cause distortion of the output signal. Furthermore, even when operating in a specific range, its current amplification factor is affected by factors including temperature. To design precise and reliable bipolar transistor circuits, the voltage-controlled viewpoint must be adopted. The voltage-controlled model introduces an exponential function to describe the voltage-current relationship; within a certain range, the functional relationship is approximately linear, allowing the transistor to be treated as a conductance element. Thus, the design of circuits such as differential amplifiers is simplified to a linear problem, so the approximate voltage-controlled viewpoint is also often selected. For translinear circuits, studying their current-voltage curves is crucial for analyzing device operation, so they are usually treated as a voltage-controlled model where the transconductance is proportional to the collector current. Transistor-level circuit design mainly uses SPICE or other similar analog circuit simulators, so the complexity of the model does not pose a significant problem for designers. However, when manually analyzing analog circuit problems, it is not always possible to adopt precise calculation methods as in classical circuit analysis, so adopting approximate methods is very necessary.

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