Zumtobel electrical components Germany Zumtobel model Zumtobel price

Zumtobel 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 electromechanical devices operated by humans, featuring one or more electrical contacts. "Closed" contacts indicate that the electrical contact is conductive, allowing current to flow; "open" switch status 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, consideration must be given to their corrosion resistance, as most metals form insulating oxides after oxidation, preventing the contacts from functioning properly. Selection of contact metals must also consider factors such as electrical conductivity, hardness, mechanical strength, cost, and toxicity. Contacts are sometimes plated with corrosion-resistant metals. Plating is generally applied to the contact surfaces to prevent performance degradation due to oxides. Sometimes non-metallic conductive materials, such as conductive plastics, are used for contact surfaces. In addition to contacts, switches contain movable parts that make or break the contact connection. Switches can be classified into toggle switches, push-button switches, rocker switches, etc., based on the type of movable part, and the movable part can also be other types of mechanical linkages.

Zumtobel electrical component principle

When the voltage applied to a varistor is below its threshold, the current flowing through it is extremely small, equivalent to a resistor with infinite resistance. That is, when the voltage applied across it is below its threshold, it acts like a switch in the open state. When the voltage applied to the varistor exceeds its threshold, the current flowing through it surges, equivalent to a resistor with near-zero resistance. That is, when the voltage applied across it is above its threshold, it acts like a switch in the closed state. Protection principle of surge absorbers: In the standby state, the 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 (only a few ohms), causing a short circuit in the line, thereby protecting electronic products or more expensive components.

Zumtobel electrical component structure

A thermopile is a pyroelectric infrared sensor, a device composed of thermocouples. It is widely used as a temperature detection device in fields such as ear thermometers, radiation thermometers, electric ovens, and food temperature detection. It consists of two or more thermocouples connected in series, where the thermoelectric potentials output by each thermocouple are superimposed. Used to measure small temperature differences or average temperatures. Structure of a thermopile: The radiation receiving surface is divided into several sections, each connected to a thermocouple; connecting them in series forms a thermopile. Depending on the application, practical thermopiles can be made in wire-type and thin-film types, and can also be made into multi-channel and array devices.

Zumtobel electrical component parameters

Rated voltage: refers to the safe voltage allowed during normal operation of the switch. If the voltage applied across the switch exceeds this value, arcing and breakdown may occur between the two contacts. Rated current: refers to the maximum safe current allowed to pass when the switch is closed; if this value is exceeded, the switch contacts may burn out due to excessive current. Insulation resistance: refers to the resistance value between the conductive part and the insulating part of the switch. Contact resistance: refers to the resistance value between each pair of contacts when the switch is in the closed state. Dielectric strength: refers to the maximum voltage the switch can withstand between the conductor and ground. Service life: refers to the number of operations the switch can perform under normal working conditions.

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