Bremas electrical components Germany Bremas model Bremas price

Bremas electrical components refer to an electronic component that can open a circuit, interrupt current flow, or direct it to another circuit. The most common switches are manually operated electromechanical devices with one or more electrical contacts. "Closed" contacts indicate that the electrical contact is conductive, allowing current to flow; "open" switch indicates that the electrical contact is non-conductive, forming an open circuit and preventing current flow. The simplest switch consists of two metal pieces called "contacts"; when the two contacts touch, they complete the current loop, and when they do not touch, the current path is open. When selecting contact metals, their resistance to corrosion must be considered, because most metals form insulating oxides after oxidation, preventing the contacts from functioning properly. When selecting contact metals, factors such as electrical conductivity, hardness, mechanical strength, cost, and toxicity must also be considered. Contacts are sometimes plated with corrosion-resistant metals. Plating is generally applied to the contact surface to prevent performance degradation due to oxides. Sometimes non-metallic conductive materials, such as conductive plastics, are used for the contact surface. In addition to contacts, switches have moving parts that make or break the contact. Switches can be classified into toggle switches, push-button switches, rocker switches, etc., based on the different moving parts, and the moving parts can also be other types of mechanical linkages.

Bremas electrical component performance

The performance of fiber optic connectors includes optical performance, as well as interchangeability, repeatability, tensile strength, temperature range, and mating cycles. 1. Optical performance: The main requirements for the optical performance of fiber optic connectors are insertion loss and return loss, which are the two most basic parameters. Insertion loss, also known as connection loss, refers to the loss of effective optical power in the link caused by the introduction of the connector. Lower insertion loss is better, and it is generally required to be no greater than 0.5dB. Return loss refers to the connector's ability to suppress the reflection of optical power in the link, and its typical value should be no less than 25dB. For connectors in practical applications, the ferrule surface undergoes special polishing treatment to achieve higher return loss, generally no less than 45dB. 2. Interchangeability and repeatability: Fiber optic connectors are universal passive components. Connectors of the same type can generally be combined arbitrarily and reused multiple times, with the additional loss introduced thereby generally being less than 0.2dB. ③ Tensile strength: For assembled fiber optic connectors, the tensile strength is generally required to be no less than 90N. ④ Temperature: Generally, fiber optic connectors must operate normally within a temperature range of -40oC to +70oC. ⑤ Mating cycles: Most fiber optic connectors used can withstand more than l005 mating cycles.

Bremas electrical component functions

The main function of ferrite beads is to eliminate RF noise present in transmission line structures (circuits). RF energy is the AC sinusoidal component superimposed on the DC transmission level, where the DC component is the desired useful signal. To eliminate this unwanted signal energy, chip ferrite beads act as high-frequency resistors (attenuators). Ferrite beads have high resistivity and permeability, equivalent to a resistor and an inductor in series, but both the resistance and inductance values vary with frequency. They offer better high-frequency filtering characteristics than ordinary inductors, presenting resistive behavior at high frequencies, thus maintaining high impedance over a relatively wide frequency range and improving tuned filtering effects. Inductors can be used for power supply filtering. The circuit symbol for a ferrite bead is the same as that for an inductor, but the model number indicates the use of a ferrite bead. In terms of circuit function, ferrite beads and inductors operate on the same principle, differing only in their frequency characteristics. The DC component is the desired useful signal, while RF RF energy is useless electromagnetic interference transmitted and radiated along the line. To eliminate this unwanted signal energy, chip ferrite beads act as high-frequency resistors (attenuators), allowing DC signals to pass while filtering out AC signals. Ferrite beads have high resistivity and permeability, equivalent to a resistor and an inductor in series. In the circuit, the wire simply passes through it. High-frequency current dissipates as heat within it; its equivalent circuit is an inductor and a resistor in series, with the values of both components proportional to the length of the ferrite bead. Some ferrite beads have multiple holes; passing the wire through them increases component impedance (proportional to the square of the number of passes through the bead). Ferrite beads can not only be used in power circuits to filter high-frequency noise (suitable for both DC and AC outputs) but are also widely used in other circuits.

Bremas electrical component characteristics

So-called dynamic characteristics refer to the output characteristics of a sensor when the input changes. In practical work, the dynamic characteristics of a sensor are often expressed by its response to certain standard input signals. This is because the sensor's response to standard input signals is easily obtained through experimental methods, and there is a certain relationship between its response to standard input signals and its response to arbitrary input signals; often, knowing the former allows inference of the latter. The most commonly used standard input signals are step signals and sinusoidal signals, so the dynamic characteristics of sensors are also commonly expressed by step response and frequency response.

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