FABASSAABLOY electrical components Germany FABASSAABLOY model FABASSAABLOY price

FABASSAABLOY electrical components include circuit board types such as: ceramic circuit boards, alumina ceramic circuit boards, aluminum nitride ceramic circuit boards, printed wiring boards, PCB boards, aluminum substrate boards, high-frequency boards, thick copper boards, impedance boards, PCB, ultra-thin printed wiring boards, ultra-thin circuit boards, and printed (copper etching technology) circuit boards. Circuit boards miniaturize and visualize circuits, playing an important role in the mass production of fixed circuits and optimizing appliance layout. Circuit boards are also known as printed wiring boards or printed circuit boards. Flexible printed wiring boards and flexible circuit boards are highly reliable, highly flexible printed circuit boards made with polyimide or polyester film as the base material. They feature high wiring density, light weight, thin thickness, and good bendability.) and rigid-flex boards—the emergence and development of FPC and PCB have spurred the new product category of rigid-flex boards. Therefore, rigid-flex boards are circuit boards formed by combining flexible printed wiring boards and rigid printed wiring boards through lamination and other processes according to relevant process requirements, resulting in a board with both FPC characteristics and PCB characteristics.

FABASSAABLOY electrical component principles

Optical measurement and control systems vary widely based on the different operating principles of photonic elements acting on light flux. Based on the nature of the output from the photonic 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. Analog photoelectric sensors can be classified into three types based on the method of measuring the target object: transmission (absorption) type, diffuse reflection type, and shading (beam blocking) type. Transmission type refers to placing the measured object in the optical path, where light energy from a constant light source passes through the object, is partially absorbed, and the transmitted light projects onto the photonic element. Diffuse reflection type refers to light from a constant source projecting onto the measured object, reflecting off its surface, and then projecting onto the photonic element. Shading type refers to the measured object blocking part of the light flux from the source, changing the light flux projected onto the photonic element; the degree of change depends on the object's position in the optical path. Photodiodes are the most common light sensors. A photodiode looks like a standard diode. When there is no light, it behaves like a normal diode with a very small reverse current, known as the dark current of the photodiode. When illuminated, carriers are excited, generating electron-hole pairs, known as photo-carriers. Under the influence of an external electric field, these photo-carriers participate in conduction, forming a reverse current much larger than the dark current, known as photocurrent. The magnitude of the photocurrent is proportional to the light intensity, so an electrical signal varying with light intensity can be obtained across the load resistor.

FABASSAABLOY electrical component principles

1. Emitter injects electrons into the base region: The power supply Ub is applied across the emitter junction via resistor Rb, forward-biasing the junction. The majority carriers (free electrons) in the emitter region continuously cross the emitter junction into the base region, forming the emitter current Ie. Simultaneously, majority carriers in the base region diffuse toward the emitter, but since their concentration is far lower than that of the emitter carriers, this current can be neglected; thus, the emitter junction current is primarily an electron flow. 2. Diffusion and recombination of electrons in the base region: After entering the base region, electrons first accumulate near the emitter junction, gradually forming an electron concentration gradient. Driven by this gradient, the electron flow diffuses through the base region toward the collector junction, where it is pulled into the collector region by the collector junction's electric field, forming the collector current Ic. A very small portion of electrons (due to the thin base) recombine with holes in the base region. The ratio of diffused electron flow to recombined electron flow determines the transistor's amplification capability. 12. Collector collects electrons: Due to the large reverse voltage applied externally to the collector junction, the resulting electric field prevents electrons in the collector region from diffusing into the base region and simultaneously pulls electrons diffusing near the collector junction into the collector region, thereby forming the main collector current Icn. Additionally, minority carriers (holes) in the collector region undergo drift motion, flowing toward the base region to form a reverse saturation current, denoted by Icbo. Its value is very small but extremely sensitive to temperature.

FABASSAABLOY electrical component principles

The thermistor will remain in a non-tripped state for extended periods; when the ambient temperature and current are in the c region, the heat dissipation power of the thermistor is close to its heat generation power, so it may or may not trip. For a given ambient temperature, the tripping time of the thermistor decreases sharply as the current increases; at relatively higher ambient temperatures, the thermistor has a shorter tripping time and lower holding current and tripping current. The PTC effect refers to a material exhibiting the PTC effect, i.e., the positive temperature coefficient effect, which means that the electrical resistance of the material increases with rising temperature. For example, most metallic materials exhibit the PTC effect. In these materials, the PTC effect manifests as a linear increase in resistance with increasing temperature, which is commonly referred to as the linear PTC effect. Nonlinear PTC effect: Materials undergoing a phase transition exhibit a phenomenon where resistance increases sharply by several to more than ten orders of magnitude over a narrow temperature range, known as the nonlinear PTC effect. Many types of conductive polymers exhibit this effect, such as polymer PTC thermistors. These conductive polymers are very useful for manufacturing overcurrent protection devices. Polymer PTC thermistors are used for overcurrent protection and are often referred to as resettable fuses (hereinafter referred to as thermistors). Due to their unique positive temperature coefficient resistance characteristics, they are highly suitable as overcurrent protection devices. The method of using a thermistor is similar to that of a conventional fuse; it is connected in series in the circuit. When the circuit operates normally, the thermistor's temperature is close to room temperature and its resistance is very low, so connecting it in series does not hinder current flow. However, when an overcurrent occurs due to a fault, the increased heat generation causes the thermistor's temperature to rise. When the temperature exceeds the switching temperature, the resistance increases dramatically, rapidly reducing the current in the circuit to a safe value. After the thermistor trips, the current in the circuit drops significantly; t is the tripping time of the thermistor. Due to the good design flexibility of polymer PTC thermistors, their temperature sensitivity can be adjusted by changing their switching temperature (ts), allowing them to provide both overtemperature and overcurrent protection. They are suitable for overcurrent and overtemperature protection of lithium-ion and nickel-metal hydride batteries. Influence of ambient temperature on polymer PTC thermistors: A polymer PTC thermistor is a direct-heating, step-type thermistor. Its resistance change process is related to its own heat generation and dissipation conditions; therefore, its holding current, tripping current, and tripping time are influenced by ambient temperature.

Weidou Intelligent Technology specializes in selling German FABASSAABLOY connectors, FABASSAABLOY switches, FABASSAABLOY relays, FABASSAABLOY controllers, FABASSAABLOY plugs, FABASSAABLOY sensors, FABASSAABLOY resistors, FABASSAABLOY capacitors, FABASSAABLOY buses, FABASSAABLOY modules, FABASSAABLOY cables, FABASSAABLOY power supplies, FABASSAABLOY interfaces, FABASSAABLOY gateways, and FABASSAABLOY circuit breakers. FABASSAABLOY products are original imports from Germany. Customers are welcome to inquire and order.