GPH electrical components German GPH models GPH prices

GPH 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 photocells. The performance and characteristic curves of photoelectric devices are analyzed.

GPH electrical component characteristics

Common types include RC phase-shift bridge trigger circuits, unijunction transistor trigger circuits, bipolar junction transistor trigger circuits, and trigger circuits that use a small thyristor to trigger a large thyristor, among others. The main parameters of thyristors are: 1, rated on-state average current IT: the average value of the 50 Hz sinusoidal half-wave current that can continuously flow between the anode and cathode under specified conditions. 2, forward blocking peak voltage VPF: the maximum forward peak voltage that can be repeatedly applied across the thyristor when the gate is open-circuited with no trigger signal applied and the anode forward voltage has not exceeded the turn-on voltage. The forward peak voltage withstand capability of the thyristor must not exceed this parameter value specified in the datasheet. 3, reverse blocking peak voltage VPR: the maximum reverse peak voltage that can be repeatedly applied across the thyristor when it is in the reverse blocking state. During operation, this parameter value specified in the datasheet must not be exceeded. 4, trigger voltage VGT: the minimum gate current and voltage required to switch the thyristor from the off state to the on state when a specified voltage is applied between the anode and cathode at a specified ambient temperature. 10, holding current IH: the minimum anode forward current required to maintain the thyristor in the conducting state at a specified temperature with the gate circuit open. Many new types of thyristor components have been introduced, such as fast thyristors suitable for high-frequency applications, bidirectional thyristors that can conduct in both directions controlled by positive or negative trigger signals, and thyristors that can be turned on by a positive trigger signal and turned off by a negative trigger signal.

GPH electrical component functions

Relays are automatic switching components with isolation functionality, widely used in remote control, telemetry, communications, automatic control, mechatronics, and power electronic equipment, making them one of the most important control elements. Relays generally feature a sensing mechanism (input section) capable of responding to specific input variables (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.); an actuating mechanism (output section) capable of controlling the "on" and "off" states of the controlled circuit; and an intermediate mechanism (drive section) between the input and output sections that provides coupling isolation, functional processing, and drives the output section. As control elements, relays serve the following functions: (1) Expanding control range: For example, when the control signal of a multi-contact relay reaches a certain value, it can simultaneously switch, disconnect, or connect multiple circuits according to different contact group configurations. (2) Amplification: For example, sensitive relays and intermediate relays can control high-power circuits using very small control signals. (3) Signal integration: For example, when multiple control signals are input into a multi-winding relay in a specified format, they are compared and integrated to achieve the desired control effect. (4) Automatic, remote control, and monitoring: For example, relays in automatic devices can form program control circuits together with other electrical appliances, thereby enabling automated operation.

GPH electrical component features

The main characteristics of thermistors are: (1) High sensitivity, with a resistance temperature coefficient larger than that of metals; (2) Wide operating temperature range; (3) Small size, capable of measuring temperatures in gaps, cavities, and blood vessels within living organisms that other thermometers cannot measure; (4) Easy to use; (5) Easily processed into complex shapes and suitable for mass production; (6) Good stability and strong overload capacity.

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