SEA electrical components Germany SEA model SEA price

SEA electrical components are wires that transmit current. Current transmission is typically point-to-point. Power cords can be classified by application into AC AC power cords and DC DC power cords. Typically, AC power cords carry higher-voltage alternating current; due to the higher voltage, these cables must comply with unified standards and obtain safety certification before formal production. In contrast, DC cables basically carry lower-voltage direct current, so their safety requirements are not as strict as those for AC cables. However, for safety reasons, countries still require unified safety certification.

SEA electrical component principle

A crystal diode is a p-n junction formed by p-type semiconductor and n-type semiconductor. A space charge layer is formed on both sides of its interface, and a built-in electric field is established. When there is no external voltage, it is in electrical equilibrium because the diffusion current caused by the carrier concentration difference on both sides of the p-n junction is equal to the drift current caused by the built-in electric field. When there is a forward voltage bias from the outside, the mutual cancellation effect of the external electric field and the built-in electric field increases the diffusion current of carriers, causing a forward current. When there is a reverse voltage bias from the outside, the external electric field and the built-in electric field are further strengthened, forming a reverse saturation current within a certain reverse voltage range that is independent of the reverse bias voltage value. When the applied reverse voltage reaches a certain level, the electric field strength in the space charge layer of the p-n junction reaches a critical value, causing a carrier multiplication process. This generates a large number of electron-hole pairs and produces a large reverse breakdown current, known as the diode breakdown phenomenon.

SEA electrical component function

In a DC circuit, a capacitor is equivalent to an open circuit. A capacitor is a component capable of storing electric charge and is one of the most commonly used electronic components. Starting with the structure of a capacitor: the simplest capacitor consists of two end plates and an insulating dielectric in between (including air). After being energized, the plates become charged, forming a voltage (potential difference). However, due to the insulating material in between, the entire capacitor does not conduct electricity. However, this situation is under the premise that the critical voltage (breakdown voltage) of the capacitor is not exceeded. We know that any material is relatively insulating. When the voltage across a material increases to a certain extent, the material can conduct electricity. We call this voltage the breakdown voltage. Capacitors are no exception; after a capacitor is broken down, it is no longer an insulator. However, at the secondary school level, such voltages are not seen in circuits, so they all operate below the breakdown voltage and can be regarded as insulators. However, in an AC circuit, the direction of current changes over time according to a certain functional relationship. The charging and discharging process of a capacitor takes time. At this time, a changing electric field is formed between the plates, and this electric field is also a function that changes with time. In fact, current passes through the capacitor in the form of an electric field.

SEA electrical component performance

1. Protection characteristics: When the impact strength of the impact source does not exceed the specified value, the clamping voltage of the varistor must not exceed the impulse withstand voltage that the protected object can withstand. 2. Impact resistance characteristics: The varistor itself should be able to withstand the specified impact current, impact energy, and average power when multiple impacts occur successively. 3. Life characteristics include two items: one is the continuous operating voltage life, meaning the varistor should be able to work reliably for a specified time (number of hours) under specified ambient temperature and system voltage conditions. The second is impact life, meaning it can reliably withstand the specified number of impacts. 14. After the varistor is integrated into the system, in addition to acting as a "safety valve" for protection, it will also introduce some additional effects, known as "secondary effects," which should not reduce the normal operating performance of the system. The main factors to consider at this time are three: first, the capacitance of the varistor itself; second, the leakage current under system voltage; and third, the influence of the varistor's nonlinear current coupling through the source impedance on other circuits.

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