VENTURELIGHTING electrical components Germany VENTURELIGHTING model VENTURELIGHTING price

VENTURELIGHTING electrical components are surge absorbers/varistor assemblies. Due to their nonlinear resistance change with voltage, they exhibit symmetry in both directions (positive and negative). They respond to abnormal voltages on the line, absorbing most of the surge energy while suppressing the abnormal voltage to a safe range, thereby improving the safety and stability of the circuit. In the standby state, the surge absorber (varistor) has very high impedance (several megaohms) relative to the protected electronic components and does not affect the characteristics of the original design circuit. However, when an instantaneous surge voltage occurs (exceeding the breakdown voltage of the surge absorber), the impedance of the surge absorber drops low (to only a few ohms), causing a short circuit in the line, thus protecting electronic products or more expensive components.

VENTURELIGHTING electrical component parameters

Key technical parameters of solid-state relays include: input voltage range, input current, turn-on voltage, turn-off voltage, reverse polarity voltage, rated output current, rated output voltage, output voltage, output leakage current, turn-on time, turn-off time, zero-crossing voltage, maximum surge voltage, electrical system peak, voltage rate of rise, operating temperature, ambient temperature range, dielectric withstand voltage, insulation resistance, electrical system peak, turn-off time, conduction time, output terminal leakage current, maximum on-state voltage transient overvoltage, maximum zero-crossing conduction voltage, power consumption, maximum surge current, minimum load current, maximum load current, output voltage range, minimum input impedance, reverse polarity voltage, input current, guaranteed turn-off voltage, guaranteed turn-on voltage, input voltage range.

VENTURELIGHTING electrical component structure

A bipolar transistor consists of three differently doped semiconductor regions: the emitter region, the base region, and the collector region. In an NPN type transistor, these regions are N-type, P-type, and N-type semiconductors, respectively, whereas in a PNP type transistor, they are P-type, N-type, and P-type semiconductors, respectively. Each semiconductor region has a lead terminal, typically denoted by the letters E, B, and C for the emitter, base, and collector, respectively. The base is physically located between the emitter and the collector and is made of lightly doped, high-resistivity material. The collector surrounds the base region. Since the collector junction is reverse-biased, it is difficult for electrons to be injected from here into the base region, resulting in a common-base current gain of approximately 8, while the common-emitter current gain achieves a larger value. From the cross-sectional diagram of a typical NPN type bipolar transistor on the right, it can be seen that the area of the collector junction is larger than that of the emitter junction. Additionally, the emitter has a relatively high doping concentration. Under normal circumstances, the regions of a bipolar transistor are not symmetric in physical properties or geometric dimensions. Assuming the transistor connected in the circuit is in the forward active region, swapping the connections of the collector and emitter in the circuit will cause the transistor to leave the forward active region and enter the reverse active region. The internal structure of the transistor determines its suitability for operation in the forward active region; therefore, the common-base and common-emitter current gains in the reverse active region are much smaller than when the transistor is in the forward active region. This functional asymmetry is fundamentally due to the different doping levels of the emitter and collector. Therefore, in an NPN type transistor, although both the collector and emitter are N-type doped, their electrical properties and functions are completely non-interchangeable. The emitter region has the highest doping level, followed by the collector region, while the base region has the lowest doping level. Furthermore, the physical dimensions of the three regions differ; the base region is very thin, and the collector area is larger than the emitter area. Due to this material structure of the bipolar transistor, a reverse bias can be provided for the collector junction, provided that this reverse bias is not excessive enough to damage the transistor. The purpose of heavy doping of the emitter is to increase the efficiency of electron injection from the emitter into the base region, thereby achieving the highest possible current gain. In the common-emitter configuration of a bipolar transistor, small changes in the voltage applied across the base and emitter terminals cause significant changes in the current between the emitter and collector. Utilizing this property allows for the amplification of input current or voltage. By treating the base of the bipolar transistor as the input terminal and the collector as the output terminal, this two-port network can be analyzed using Thévenin's theorem. Based on equivalent principles, the bipolar transistor can be viewed as a voltage-controlled current source or as a current-controlled voltage source. Additionally, looking into the left side of the two-port network, the input impedance at the base is reduced to the base resistance, thereby lowering the loading requirements on the preceding stage circuit.

VENTURELIGHTING electrical component principle

Optical measurement and control systems are diverse, developed based on different principles of how luminous flux acts on photoelectric elements. According to the nature of the output from the photoelectric element (optical measurement and control system), they can be divided into two categories: analog photoelectric sensors and pulse (switching) photoelectric sensors. Analog photoelectric sensors convert the measured quantity into a continuously changing photocurrent, exhibiting a single-valued relationship with the measured quantity. Based on the method of measuring the target object, analog photoelectric sensors can be classified into three major types: transmission (absorption) type, diffuse reflection type, and beam interruption (light blocking) type. The transmission type refers to a configuration where the measured object is placed in the optical path; the light energy emitted by a constant light source passes through the object, and after partial absorption, the transmitted light strikes the photoelectric element. The diffuse reflection type refers to a configuration where light from a constant source is projected onto the measured object, and after reflecting off the object's surface, it strikes the photoelectric element. The beam interruption type refers to a configuration where the measured object blocks part of the luminous flux from the light source, causing a change in the luminous flux reaching the photoelectric element; the degree of change depends on the position of the measured object within the optical path. Photodiodes are the most common type of light sensor. A photodiode has the same appearance as a standard diode. When there is no illumination, it behaves like a ordinary diode with a very small reverse current, known as the dark current of the photodiode. When illuminated, carriers are excited, generating electron-hole pairs, referred to as photo-generated carriers. Under the influence of an external electric field, these photo-generated carriers participate in conduction, forming a reverse current much larger than the dark current; this reverse current is called the photocurrent. The magnitude of the photocurrent is proportional to the light intensity, allowing an electrical signal that varies with light intensity to be obtained across the load resistor.

Weidou Intelligent Technology specializes in selling German VENTURELIGHTING connectors, VENTURELIGHTING switches, VENTURELIGHTING relays, VENTURELIGHTING controllers, VENTURELIGHTING plugs, VENTURELIGHTING sensors, VENTURELIGHTING resistors, VENTURELIGHTING capacitors, VENTURELIGHTING buses, VENTURELIGHTING modules, VENTURELIGHTING cables, VENTURELIGHTING power supplies, VENTURELIGHTING interfaces, VENTURELIGHTING gateways, VENTURELIGHTING circuit breakers, VENTURELIGHTING original imports from Germany. We welcome inquiries and orders from users.