KATKO electrical components Germany KATKO model KATKO price

KATKO electrical components are indispensable measuring instruments for departments such as power electronics, generally with the main purpose of measuring voltage, current, and resistance. Multimeters are divided into analog multimeters and digital multimeters according to the display method. It is a multi-function, multi-range measuring instrument. General multimeters can measure DC current, DC voltage, AC current, AC voltage, resistance, and audio levels, etc. Some can also measure AC current, capacitance, inductance, and some parameters of semiconductors (such as β), etc. A multimeter is a magnetoelectric instrument with a rectifier that can measure various electrical parameters such as AC/DC current, voltage, and resistance. For each electrical quantity, there are generally several ranges. Also known as a multi-meter or simply multi-meter. A multimeter consists of a magnetoelectric ammeter (meter head), measuring circuit, and selector switch, etc. Through the switching of the selector switch, various electrical parameters can be measured conveniently. The main basis for its circuit calculation is Ohm's law for closed circuits. There are many types of multimeters, which should be selected according to different requirements during use.

KATKO electrical components function

Functions of capacitors: 1. Capacitors used in coupling circuits are called coupling capacitors. This type of capacitor circuit is widely used in RC-coupled amplifiers and other capacitor-coupled circuits, serving to block DC and pass AC. 2. Capacitors used in filtering circuits are called filter capacitors. This type of capacitor circuit is used in power supply filtering and various filter circuits; filter capacitors remove signals within a certain frequency band from the total signal. 2. Capacitors used in decoupling circuits are called decoupling capacitors. This type of capacitor circuit is used in the DC voltage supply circuits of multi-stage amplifiers; decoupling capacitors eliminate harmful low-frequency coupling between amplifier stages. 3. Capacitors used in high-frequency oscillation suppression circuits are called high-frequency suppression capacitors. In audio negative feedback amplifiers, this type of capacitor circuit is adopted to suppress possible high-frequency self-excitation, thereby eliminating potential high-frequency squealing in the amplifier. 4. Capacitors used in LC resonant circuits are called resonant capacitors; this type of capacitor circuit is required in both LC parallel and series resonant circuits. 5. Capacitors used in bypass circuits are called bypass capacitors. If a signal in a certain frequency band needs to be removed from the signal in a circuit, a bypass capacitor circuit can be used. Depending on the frequency of the signal to be removed, there are full-frequency-domain (all AC signals) bypass capacitor circuits and high-frequency bypass capacitor circuits. 6. Capacitors used in neutralization circuits are called neutralization capacitors. In radio HF and IF amplifiers, and TV HF amplifiers, this type of neutralization capacitor circuit is adopted to eliminate self-excitation. 7. Capacitors used in timing circuits are called timing capacitors. Timing capacitor circuits are used in circuits that require time control through capacitor charging and discharging; the capacitor serves to control the magnitude of the time constant. 8. Capacitors used in integration circuits are called integrating capacitors. In the synchronization separation circuit for potential field scanning, this type of integrating capacitor circuit is adopted to extract the field synchronization signal from the field composite synchronization signal. 9. Capacitors used in differentiation circuits are called differentiating capacitors. In flip-flop circuits, this type of differentiating capacitor circuit is adopted to obtain spike trigger signals, thereby deriving spike pulse trigger signals from various (mainly rectangular pulse) signals. 10. Capacitors used in compensation circuits are called compensation capacitors. In the bass compensation circuit of a cassette deck, this type of low-frequency compensation capacitor circuit is used to enhance low-frequency signals in the playback signal; additionally, there are high-frequency compensation capacitor circuits. 11. Capacitors used in bootstrap circuits are called bootstrap capacitors. The common OTL power amplifier output stage circuit adopts this type of bootstrap capacitor circuit to slightly increase the amplitude of the positive half-cycle of the signal through positive feedback. 12. Capacitors used in crossover circuits are called crossover capacitors. In the speaker crossover circuit of a loudspeaker box, crossover capacitor circuits are used to ensure that the tweeter operates in the high-frequency band, the mid-range speaker operates in the mid-frequency band, and the woofer operates in the low-frequency band. 13. Refers to the effective external capacitance that, together with the quartz crystal resonator, determines the load resonant frequency. Common standard values for load capacitance include 16pF, 20pF, 30pF, 50pF, and 106pF. Load capacitance can be appropriately adjusted according to specific conditions; through adjustment, the operating frequency of the resonator can generally be tuned to the nominal value.

KATKO electrical components classification

For most conductors, at a certain temperature, their resistance remains almost constant at a fixed value; this type of resistance is called linear resistance. The resistance of some materials changes significantly with current (or voltage), and their V-I characteristic is a curve; this type of resistance is called nonlinear resistance. For a nonlinear resistor under a given voltage (or current), the ratio of voltage to current is the static resistance at that operating point, and the slope on the V-I characteristic curve is the dynamic resistance. The methods for expressing nonlinear resistance characteristics are complex, but these nonlinear relationships are widely applied in electronic circuits.

KATKO electrical components composition

1. Generally, a fuse consists of three parts: First is the fusible element part, which is the core of the fuse and serves to cut off the current when it melts. For fuses of the same type and specification, the fusible elements must have the same material, identical geometric dimensions, as small and consistent resistance values as possible, and most importantly, consistent fusing characteristics. Household fuses are commonly made of lead-antimony alloy. Second is the electrode part, usually having two electrodes. It is an important component connecting the fusible element to the circuit. It must have good conductivity and should not produce significant installation contact resistance. Third is the holder part. The fusible element of a fuse is generally slender and soft. The role of the holder is to fix the fusible element and make the three parts a rigid whole for easy installation and use. It must have good mechanical strength, insulation, heat resistance, and flame retardancy. During use, phenomena such as breakage, deformation, combustion, and short circuits should not occur. 2. Arc extinguishing device: Fuses used in power circuits and high-power equipment not only have the three parts of general fuses but also include an arc extinguishing device. This is because the circuits protected by such fuses not only have larger operating currents, but also have very high voltages across the terminals when the fusible element melts. Often, the fusible element has melted (fused) or even vaporized, but the current has not been cut off. The reason is that arcing occurs between the two electrodes of the fuse at the moment of fusing under the action of voltage and current. This arc extinguishing device must have strong insulation and good thermal conductivity, and exhibit negative electronegativity. Quartz sand is a commonly used arc extinguishing material. 4. Fusing indication device: Some fuses have a fusing indication device. Its function is to cause certain appearance changes to itself after the fuse operates (melts), making it easy for maintenance personnel to detect, such as emitting light, changing color, or popping out a solid indicator.

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