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herz electrical components consist of wire wound turn by turn on an insulating tube. The wires are mutually insulated, and the insulating tube can be hollow or contain an iron core or magnetic powder core. Inductor coils are devices that operate based on the principle of electromagnetic induction. When current flows through a wire, it generates an electromagnetic field around the wire, and this electromagnetic field induces effects on the wire itself within the field range. The effect on the wire generating the electromagnetic field is called "self-inductance," meaning the changing current generated by the wire produces a changing magnetic field, which further affects the current in the wire; the effect on other wires within this electromagnetic field range is called "mutual inductance." The electrical characteristics of inductor coils are opposite to those of capacitors: "pass low frequencies, block high frequencies." High-frequency signals encounter significant resistance when passing through an inductor coil and struggle to pass; whereas low-frequency signals encounter less resistance and pass more easily. The resistance of an inductor coil to direct current is nearly zero. Resistance, capacitance, and inductance all present certain resistance to the flow of electrical signals in a circuit, which we call "impedance." The impedance presented by an inductor coil to current signals utilizes the coil's self-inductance. Inductor coils are sometimes abbreviated as "inductance" or "coil," represented by the letter "L." When winding an inductor coil, the number of turns is generally referred to as the coil's "number of turns."

herz electrical component applications

SMD inductors are electromagnetic induction components made by winding insulated wire. They belong to commonly used inductive components. Function of SMD inductors: Passing DC and blocking AC is a simple description; they isolate and filter AC signals or form resonant circuits with capacitors, resistors, etc. Function of tuning and frequency selection inductors: An inductor coil connected in parallel with a capacitor can form an LC tuned circuit. Any current in the circuit through an SMD inductor generates a magnetic field, and the magnetic flux of this field acts on the circuit. When the current through the SMD inductor changes, the DC voltage potential generated in the SMD inductor opposes the change in current. When the current through the inductor coil increases, the self-induced electromotive force generated by the inductor coil is opposite to the direction of the current, opposing the increase in current, while converting part of the electrical energy into magnetic energy stored in the inductor; when the current through the inductor coil decreases, the self-induced electromotive force is in the same direction as the current, opposing the decrease in current, while releasing stored energy to compensate for the decrease in current. Therefore, after inductive filtering, not only are the ripples of load current and voltage reduced and the waveform smoothed, but the conduction angle of the rectifier diode also increases. Function of inductors 1: Color-ring inductors have a current-blocking effect: The copper core in color-ring inductor coils always opposes changes in current within the coil. Color-ring inductors impede AC current used in circuits; the magnitude of this impedance is called inductive reactance XL, measured in ohms. Its relationship with inductance L and AC frequency f is XL=2πfL. Color-ring inductors are mainly classified into high-frequency choke coils and low-frequency choke coils. Function of inductors 2: Color-ring inductors have tuning and frequency selection functions: A color-ring inductor connected in parallel with an electrolytic capacitor can form an LC tuned circuit. At resonance, the inductive reactance and capacitive reactance of the circuit are equal in magnitude but opposite in phase, meaning the natural oscillation frequency f0 of the circuit equals the frequency f of the non-AC signal, so the inductive reactance and capacitive reactance of the loop are also equal. The usage of color-ring inductors is generally not very high, and color-ring inductors used in circuits are generally quite stable. Function of inductors 3: The main uses of color-ring inductors include signal screening, noise filtering, current stabilization, and suppression of electromagnetic interference. The basic function of color-ring inductors is charging and discharging, but many circuit phenomena derived from this basic charge-discharge function give color-ring inductors various different applications. Today, color-ring inductors are widely used by customers, and the role played by these small inductors should not be underestimated.

herz electrical component applications

SMD inductors are electromagnetic induction components made by winding insulated wire. They belong to commonly used inductive components. Function of SMD inductors: Passing DC and blocking AC is a simple description; they isolate and filter AC signals or form resonant circuits with capacitors, resistors, etc. Function of tuning and frequency selection inductors: An inductor coil connected in parallel with a capacitor can form an LC tuned circuit. Any current in the circuit through an SMD inductor generates a magnetic field, and the magnetic flux of this field acts on the circuit. When the current through the SMD inductor changes, the DC voltage potential generated in the SMD inductor opposes the change in current. When the current through the inductor coil increases, the self-induced electromotive force generated by the inductor coil is opposite to the direction of the current, opposing the increase in current, while converting part of the electrical energy into magnetic energy stored in the inductor; when the current through the inductor coil decreases, the self-induced electromotive force is in the same direction as the current, opposing the decrease in current, while releasing stored energy to compensate for the decrease in current. Therefore, after inductive filtering, not only are the ripples of load current and voltage reduced and the waveform smoothed, but the conduction angle of the rectifier diode also increases. Function of inductors 1: Color-ring inductors have a current-blocking effect: The copper core in color-ring inductor coils always opposes changes in current within the coil. Color-ring inductors impede AC current used in circuits; the magnitude of this impedance is called inductive reactance XL, measured in ohms. Its relationship with inductance L and AC frequency f is XL=2πfL. Color-ring inductors are mainly classified into high-frequency choke coils and low-frequency choke coils. Function of inductors 2: Color-ring inductors have tuning and frequency selection functions: A color-ring inductor connected in parallel with an electrolytic capacitor can form an LC tuned circuit. At resonance, the inductive reactance and capacitive reactance of the circuit are equal in magnitude but opposite in phase, meaning the natural oscillation frequency f0 of the circuit equals the frequency f of the non-AC signal, so the inductive reactance and capacitive reactance of the loop are also equal. The usage of color-ring inductors is generally not very high, and color-ring inductors used in circuits are generally quite stable. Function of inductors 10: The main uses of color-ring inductors include signal screening, noise filtering, current stabilization, and suppression of electromagnetic interference. The basic function of color-ring inductors is charging and discharging, but many circuit phenomena derived from this basic charge-discharge function give color-ring inductors various different applications. Today, color-ring inductors are widely used by customers, and the role played by these small inductors should not be underestimated.

herz electrical component parameters

The main parameters of transistors include current amplification factor, power dissipation, frequency characteristics, maximum collector current, maximum reverse voltage, and reverse current. Amplification factor: The DC current amplification factor, also known as the static current amplification factor or DC amplification ratio, refers to the ratio of collector current to base current in a transistor when there is no changing signal input under static conditions. AC amplification factor: The AC amplification factor, also known as the AC current amplification factor or dynamic current amplification factor, refers to the ratio of the change in collector current to the change in base current in a transistor under AC conditions. Power dissipation: Power dissipation, also known as the maximum allowable collector power dissipation PCM, refers to the maximum collector power dissipation when transistor parameter variations do not exceed specified allowable values. Power dissipation is closely related to the transistor's maximum allowable junction temperature and maximum collector current. During use, the actual power consumption of a transistor must not exceed the PCM value; otherwise, the transistor may be damaged due to overload. When the operating frequency of a transistor exceeds the cutoff frequency, its current amplification factor decreases as the frequency increases. The maximum oscillation frequency refers to the frequency at which the transistor's power gain drops to 9. Typically, the maximum oscillation frequency of high-frequency transistors is lower than the common-base cutoff frequency, while the characteristic frequency is higher than the common-base cutoff frequency and lower than the common-collector cutoff frequency. Maximum current: The maximum collector current refers to the maximum current allowed to pass through the transistor's collector. Maximum reverse voltage: The maximum reverse voltage refers to the highest working voltage allowed to be applied to the transistor during operation. It includes the collector-emitter reverse breakdown voltage, collector-base reverse breakdown voltage, and emitter-base reverse breakdown voltage. Collector reverse breakdown voltage refers to the maximum allowable reverse voltage between the collector and emitter when the transistor base is open. Base reverse breakdown voltage refers to the maximum allowable reverse voltage between the collector and base when the transistor emitter is open. Emitter reverse breakdown voltage refers to the maximum allowable reverse voltage between the emitter and base when the transistor collector is open. The reverse current between bases, also known as the collector junction reverse leakage current, refers to the reverse current between the collector and base when the transistor emitter is open. The reverse breakdown current between emitters refers to the reverse leakage current between the collector and emitter when the transistor base is open, also known as penetration current. The smaller this current value, the better the transistor's performance.

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