KORADO electrical components Germany KORADO model KORADO price

KORADO electrical components are a new type of contactless switching device composed entirely of solid-state electronic components. It utilizes the switching characteristics of electronic components (such as switching transistors, triacs, and other semiconductor devices) to achieve contactless and spark-free connection and disconnection of circuits, hence it is also known as a "contactless switch." A solid-state relay is a four-terminal active device, where two terminals are input control terminals and the other two are output controlled terminals. It has both amplification drive function and isolation function, making it very suitable for driving high-power switching actuators. Compared with electromagnetic relays, it offers higher reliability, is contactless, has a long service life, fast speed, and low external interference, and has been widely used [1].

KORADO electrical components principle

The Hall voltage changes with the magnetic field strength; the stronger the magnetic field, the higher the voltage, and the weaker the magnetic field, the lower the voltage. The Hall voltage value is very small, typically only a few millivolts, but after being amplified by an amplifier in an integrated circuit, the voltage can be amplified enough to output a stronger signal. To make the Hall integrated circuit act as a sensor, mechanical methods are needed to change the magnetic field strength. Using a rotating impeller as a switch to control magnetic flux, when the impeller blades are in the air gap between the magnet and the Hall integrated circuit, the magnetic field deviates from the integrated chip, and the Hall voltage disappears. In this way, the change in the output voltage of the Hall integrated circuit can indicate a certain position of the impeller drive shaft. Using this working principle, the Hall integrated circuit chip can be used as an ignition timing sensor. Hall effect sensors belong to passive sensors; they require an external power supply to work. This characteristic enables them to detect low-speed operation conditions.

KORADO electrical components function

A multimeter can not only be used to measure the resistance of the object under test, AC and DC voltage, but also DC current. Some multimeters can even measure the main parameters of transistors and the capacitance of capacitors. Proficient mastery of multimeter usage is one of the most basic skills in electronic technology. Common multimeters include analog multimeters and digital multimeters. An analog multimeter is a multifunctional measuring instrument with a meter head as the core component, and the measured value is read from the pointer of the meter head. The measured value of a digital multimeter is directly displayed in numerical form on an LCD screen, which is convenient to read, and some also have voice prompt functions. A multimeter is an instrument that integrates a voltmeter, ammeter, and ohmmeter using a common meter head. The DC current range of a multimeter is a multi-range DC ammeter. Connecting shunt resistors in parallel with the meter head can expand its current range. The DC voltage range of a multimeter is a multi-range DC voltmeter. Connecting voltage divider resistors in series with the meter head can expand its voltage range. Different voltage divider resistors correspond to different ranges. The meter head of a multimeter is a magnetoelectric measuring mechanism, which can only pass DC. Diodes are used to convert AC to DC, thereby achieving AC measurement.

KORADO electrical components parameters

1. Stable voltage refers to the stable voltage value generated across the zener diode when it passes the rated current. This value changes slightly with different operating currents and temperatures. Due to differences in manufacturing processes, the stabilization voltage of zener diodes of the same model is not completely consistent. 2. Reverse leakage current refers to the current value passing through the zener diode when it generates a stable voltage. Below this value, although the zener diode can still stabilize voltage, the stabilization effect will deteriorate; above this value, as long as the rated power dissipation is not exceeded, it is allowed, and the stabilization performance will be better, but it will consume more electrical energy. 3. Dynamic resistance refers to the ratio of the voltage change to the current change across the zener diode. This ratio changes with different operating currents; generally, the larger the operating current, the smaller the dynamic resistance. 4. Rated power dissipation is determined by the allowable temperature rise of the chip, and its value is the product of the stable voltage and the maximum allowable current. 5. Temperature coefficient: If the temperature of the zener diode changes, its stable voltage will also undergo slight changes. The relative change in voltage across the tube caused by a temperature change of 1℃ is the temperature coefficient (unit: %/℃). Generally speaking, stabilization voltages below 6V belong to Zener breakdown, and the temperature coefficient is negative; the temperature coefficient is positive. When the temperature rises, the depletion layer decreases. In the depletion layer, the valence electrons of atoms rise to higher energy levels, and a smaller electric field strength can excite valence electrons from atoms to produce Zener breakdown, so its temperature coefficient is negative. Avalanche breakdown occurs when the depletion layer is wider and the electric field strength is lower. Increased temperature increases the vibration amplitude of lattice atoms, hindering the movement of carriers. In this case, only by increasing the reverse voltage can avalanche breakdown occur, so the voltage temperature coefficient of avalanche breakdown is positive. For occasions with high requirements for power supplies, two zener diodes with opposite temperature coefficients can be connected in series for compensation. Due to mutual compensation, the temperature coefficient is greatly reduced. 15. Reverse leakage current refers to the leakage current generated by the zener diode under the specified reverse voltage.

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