FABASSAABLOY electrical components Germany FABASSAABLOY model FABASSAABLOY price

FABASSAABLOY electrical components refer to circuit boards, including: 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-controlled 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 a crucial 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 profile, and good bendability.) and rigid-flex boards—the emergence and development of FPC and PCB have spurred the creation of rigid-flex boards as a new product. 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 that possesses both FPC characteristics and PCB characteristics.

FABASSAABLOY electrical component principles

Optical measurement and control systems vary widely depending on the principle of action of luminous flux on photoelectric elements. Based on 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. 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 light-blocking (beam obstruction) type. The transmission type refers to placing the measured object in the optical path; 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 light from a constant source striking the measured object and then reflecting off its surface onto the photoelectric element. The light-blocking type refers to the scenario where the measured object blocks part of the luminous flux from the light source, changing the luminous flux reaching the photoelectric element; the degree of change depends on the object's position in the optical path. Photodiodes are the most common light sensors. A photodiode resembles a standard diode in appearance. In the absence of light, it behaves like a regular 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-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, allowing an electrical signal that varies with light intensity to 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. The emitter junction is forward-biased, causing the majority carriers (free electrons) in the emitter region to 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 region, but since their concentration is far lower than that of carriers in the emitter region, 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 initially accumulate near the emitter junction, gradually forming an electron concentration gradient. Driven by this gradient, electrons diffuse through the base region toward the collector junction and are 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 region) recombine with holes in the base. 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 toward the base region, forming a reverse saturation current, denoted by Icbo. Its value is very small but extremely sensitive to temperature.

FABASSAABLOY electrical component principles

The thermistor remains in a non-tripped state for extended periods; when ambient temperature and current are in the c region, the thermistor's heat dissipation power approximates its heat generation power, so it may or may not trip. For a given ambient temperature, the tripping time of a thermistor decreases sharply as current increases; at higher ambient temperatures, the thermistor exhibits shorter tripping times and lower holding and tripping currents. The PTC effect refers to a material exhibiting the PTC effect, i.e., the Positive Temperature Coefficient (PTC) effect, where the material's resistance increases with rising temperature. For instance, most metallic materials exhibit the PTC effect. In these materials, the PTC effect manifests as a linear increase in resistance with temperature, commonly known as the linear PTC effect. Nonlinear PTC effect: Materials undergoing phase transitions exhibit a phenomenon where resistance increases abruptly by several to over ten orders of magnitude within 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 highly 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 ideally suited as overcurrent protection devices. Thermistors are used in series in circuits, similar to conventional fuses. During normal circuit operation, the thermistor's temperature is close to ambient, its resistance is low, and it does not impede current flow. However, when a fault causes overcurrent, the increased heat generation raises the thermistor's temperature. When the temperature exceeds the switching temperature, the resistance increases dramatically, rapidly reducing the circuit current to a safe level. After the thermistor trips, the circuit current drops significantly. t represents the thermistor's tripping time. Due to the good design flexibility of polymer PTC thermistors, their temperature sensitivity can be adjusted by modifying their switching temperature (ts), allowing them to provide both overtemperature and overcurrent protection. This makes them suitable for overcurrent and overtemperature protection in lithium-ion and nickel-metal hydride batteries. Influence of ambient temperature on polymer PTC thermistors: Polymer PTC thermistors are direct-heating, step-type thermistors. Their resistance change process depends on their own heating and cooling conditions; therefore, their 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 place orders.