BESPLAST electrical components Germany BESPLAST model BESPLAST price

BESPLAST electrical components include single heterojunction, double heterojunction, and quantum well laser diodes. Quantum well laser diodes have the advantages of low threshold current and high output power, making them mainstream products in market applications. Compared to lasers, laser diodes offer high efficiency, small size, and long service life, but their low output power, poor linearity, and less ideal monochromaticity greatly limit their application in cable TV systems, preventing the transmission of multi-channel, high-performance analog signals. In the return module of bidirectional optical receivers, upstream transmission generally uses quantum well laser diodes as the light source.

BESPLAST electrical component features

The main characteristics of thermistors are: (1) high sensitivity, with a resistance temperature coefficient larger than that of metals; (2) wide operating temperature range; (3) small size, capable of measuring temperatures in gaps, cavities, and blood vessels within living organisms that other thermometers cannot measure; (4) easy to use; (5) easy to process into complex shapes for mass production; (6) good stability and strong overload capacity.

BESPLAST electrical component applications

SMD inductors are electromagnetic induction components made by winding insulated wire. They belong to commonly used inductor components. The 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 and resistors. Function of tuning and frequency selection inductors: an inductor coil connected in parallel with a capacitor can form an LC tuning 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 passing 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. Inductor function 1: Color-ring inductors have a current-blocking effect: the copper core in the color-ring inductor coil always opposes changes in the 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 divided into high-frequency choke coils and low-frequency choke coils. Inductor function 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 tuning circuit. At resonance, the inductive reactance and capacitive reactance of the circuit are equal in magnitude but opposite in direction, meaning the natural oscillation frequency f0 of the circuit equals the frequency f of the non-AC signal, so the inductive and capacitive reactances of the loop are also equal. The usage of color-ring inductors is generally not very high, and those used in circuits are generally quite stable. Inductor function 3: The main uses of color-ring inductors include signal screening, noise filtering, current stabilization, and suppression of electromagnetic wave interference. The basic function of color-ring inductors is charging and discharging, but many circuit phenomena derived from this basic charging and discharging action 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.

BESPLAST electrical component characteristics

(1) Volt-ampere characteristics: When a forward voltage is applied to a diode, the current is extremely small when the voltage value is low; when the voltage exceeds a certain value, the current begins to increase exponentially, typically referred to as the diode's turn-on voltage, at which point the diode is in a fully conductive state, typically referred to as the diode's conduction voltage. For germanium diodes, when a reverse voltage is applied to a diode, the current is extremely small when the voltage value is low, and this current value is the reverse saturation current. When the reverse voltage exceeds a certain value, the current increases sharply, known as reverse breakdown, and this voltage is called the diode's reverse breakdown voltage. The breakdown voltage values of different diode models vary significantly, ranging from tens of volts to thousands of volts. (2) Forward characteristics: When external forward voltage is applied, in the initial part of the forward characteristics, the forward voltage is very small and insufficient to overcome the blocking effect of the electric field within the PN junction, so the forward current is almost zero; this region is called the dead zone. This forward voltage that cannot make the diode conductive is called the dead zone voltage. When the forward voltage is greater than the dead zone voltage, the electric field within the PN junction is overcome, the diode conducts in the forward direction, and the current rises rapidly with increasing voltage. Within the normal operating current range, the terminal voltage of the diode during conduction remains almost constant; this voltage is called the diode's forward voltage. When the forward voltage across the diode exceeds a certain numerical value, the internal electric field is quickly weakened, the characteristic current grows rapidly, and the diode conducts in the forward direction; this is called the threshold voltage or knee voltage. (3) Reverse characteristics: When the applied reverse voltage does not exceed a certain range, the current flowing through the diode is a reverse current formed by the drift motion of minority carriers. Since the reverse current is very small, the diode is in a cutoff state. This reverse current is also called reverse saturation current or leakage current, and the diode's reverse saturation current is greatly affected by temperature. Generally, the reverse current of silicon tubes is much smaller than that of germanium tubes; the reverse saturation current of low-power silicon tubes is in the order of nA, and that of low-power germanium tubes is in the order of μA. As temperature rises, semiconductors are thermally excited, the number of minority carriers increases, and the reverse saturation current also increases. (4) Breakdown characteristics: When the applied reverse voltage exceeds a certain value, the reverse current suddenly increases; this phenomenon is called electrical breakdown. The critical voltage causing electrical breakdown is called the diode's reverse breakdown voltage. During electrical breakdown, the diode loses its unidirectional conductivity. If the diode does not overheat due to electrical breakdown, its unidirectional conductivity may not be permanently destroyed, and its performance can recover after the external voltage is removed; otherwise, the diode will be damaged. Therefore, excessively high reverse voltage applied to the diode should be avoided during use. Reverse breakdown is divided into Zener breakdown and avalanche breakdown based on mechanism. In cases of high doping concentration, because the barrier region width is very small, a large reverse voltage destroys the covalent bond structure within the barrier region, freeing valence electrons from covalent bond constraints and generating electron-hole pairs, causing the current to increase sharply; this breakdown is called Zener breakdown. If the doping concentration is lower, the barrier region width is wider, making Zener breakdown less likely to occur. Another type of breakdown is avalanche breakdown. When the reverse voltage increases to a large value, the external electric field accelerates electron drift speed, causing collisions with valence electrons in covalent bonds, knocking valence electrons out of covalent bonds and generating new electron-hole pairs. The newly generated electron-hole pairs are accelerated by the electric field and knock out other valence electrons, causing an avalanche-like increase in carriers and a sharp increase in current; this breakdown is called avalanche breakdown. Regardless of the type of breakdown, if the current is not limited, it may cause permanent damage to the PN junction. (5) Reverse current: Reverse current refers to the current flowing through the diode when it is subjected to ambient temperature and maximum reverse voltage. The smaller the reverse current, the better the unidirectional conductivity of the tube. It is worth noting that reverse current is closely related to temperature; the reverse current doubles. Therefore, silicon diodes have better stability at high temperatures than germanium diodes. (6) Dynamic resistance: The ratio of the change in voltage to the corresponding change in current near the static operating point of the diode characteristic curve. (7) Voltage temperature coefficient: The voltage temperature coefficient refers to the relative change in stable voltage for every one degree Celsius increase in temperature. (8) Maximum operating frequency: The maximum operating frequency is the upper frequency limit for diode operation. Since the diode, like the PN junction, has junction capacitance composed of barrier capacitance, the value of the maximum operating frequency mainly depends on the size of the PN junction capacitance. If this value is exceeded, unidirectional conductivity will be affected. (9) Maximum rectified current: Maximum rectified current refers to the maximum allowable average forward current value when the diode operates continuously for a long period; its value is related to the PN junction area and external heat dissipation conditions. Because current passing through the tube causes the core to heat up and the temperature to rise, exceeding the permissible limit will cause the core to overheat and become damaged. Therefore, under specified heat dissipation conditions, the diode should not exceed its maximum rectified current value during use.(10) Maximum reverse working voltage: When the reverse voltage applied across the diode reaches a certain high value, the tube will break down and lose its unidirectional conductivity. To ensure safe operation, a maximum reverse working voltage value is specified.

Weidou Intelligent Technology professionally sells German BESPLAST connectors, BESPLAST switches, BESPLAST relays, BESPLAST controllers, BESPLAST plugs, BESPLAST sensors, BESPLAST resistors, BESPLAST capacitors, BESPLAST buses, BESPLAST modules, BESPLAST cables, BESPLAST power supplies, BESPLAST interfaces, BESPLAST gateways, BESPLAST circuit breakers, BESPLAST original imports from Germany. Welcome users to inquire and order.