sterling electrical components, German sterling models, sterling prices

sterling electrical components are devices that convert optical signals into electrical signals. Their operating principle is based on the photoelectric effect. The photoelectric effect refers to the phenomenon where electrons in a material absorb photon energy when light strikes certain substances, resulting in corresponding electrical effects. Based on the different manifestations of the photoelectric effect, it is classified into three categories: external photoelectric effect, internal photoelectric effect, and photovoltaic effect. Photoelectric devices include phototubes, photomultiplier tubes, photoresistors, photodiodes, phototransistors, and solar cells. The performance and characteristic curves of photoelectric devices are analyzed.

sterling electrical component parameters

1. Nominal varistor voltage: refers to the voltage across the varistor when a pulse current of specified duration passes through it. 2. Voltage ratio: refers to the ratio of the voltage generated by the current in the varistor to the voltage generated by the current in the varistor. 3. Maximum limiting voltage: the peak voltage across the varistor under the maximum pulse peak current Ip that the varistor can withstand and under the specified waveform. 4. Residual voltage ratio: when the current passing through the varistor is at a certain value, the voltage generated across it is called the residual voltage for that current value. The residual voltage ratio is the ratio of the residual voltage to the nominal voltage. 5. Surge current capacity: also known as surge current rating, it refers to the maximum pulse current value allowed to pass through the varistor under specified conditions. 6. Leakage current: also known as standby current, it refers to the current flowing through the varistor at a specified temperature and maximum DC voltage. 7. Voltage temperature coefficient: refers to the rate of change of the nominal voltage of the varistor within a specified temperature range, i.e., the relative change in voltage across the varistor when the temperature changes while the current through the varistor remains constant. 8. Current temperature coefficient: refers to the relative change in current flowing through the varistor when the temperature changes while the voltage across the varistor remains constant. 9. Voltage nonlinearity coefficient: refers to the ratio of the static resistance to the dynamic resistance of the varistor under a given applied voltage. 10. Insulation resistance: refers to the resistance between the lead wires of the varistor and the insulating surface of the resistive body. 11. Static capacitance: refers to the inherent capacitance of the varistor itself. 12. Rated power: the maximum power that causes a change in varistor voltage when operating at a specific ambient temperature. 18. Maximum impulse current: the maximum impulse current that causes a change in varistor voltage when the varistor is subjected to a specific pulse current impulse once or twice.

sterling electrical component features

Among various types of switches, there is a component with the ability to "sense" objects approaching it—the displacement sensor. Utilizing the sensitivity of the displacement sensor to approaching objects achieves the purpose of controlling the switch on or off; this is a proximity switch. Only when an object moves toward the proximity switch and approaches within a certain distance does the displacement sensor "sense" it, causing the switch to actuate. This distance is usually called the "detection distance." Different proximity switches have different detection distances. Sometimes, the detected objects move toward the proximity switch one by one at certain time intervals and then leave one by one, repeating continuously. Different proximity switches have different response capabilities to the detection objects. This response characteristic is called the "response frequency."

sterling electrical component principles

A photodiode is a semiconductor device that converts optical signals into electrical signals. Its core part is also a PN junction. Compared with ordinary diodes, the structural difference is that, to facilitate the reception of incident light, the PN junction area is made as large as possible, the electrode area is made as small as possible, and the junction depth of the PN junction is very shallow, generally less than 8 micrometers. Photodiodes operate under reverse bias. When there is no illumination, the reverse current is very small, called dark current. When illuminated, photons carrying energy enter the PN junction and transfer energy to bound electrons in covalent bonds, causing some electrons to break free from the covalent bonds, thereby generating electron-hole pairs, known as photogenerated carriers. Under the influence of reverse voltage, they participate in drift motion, significantly increasing the reverse current. The greater the light intensity, the greater the reverse current. This characteristic is called "photoconductivity." The current generated by a photodiode under general illumination is called photocurrent. If a load is connected in the external circuit, the load receives an electrical signal, and this electrical signal changes correspondingly with changes in light. Photodiodes are widely used photosensitive devices in electronic circuits. Like ordinary diodes, photodiodes have a PN junction. The difference is that the photodiode housing has a transparent window to receive light irradiation, achieving photoelectric conversion. In circuit diagrams, the text symbol is generally VD.

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