Buerklin electrical components Germany Buerklin model Buerklin price

Buerklin electrical components are resistive elements with three terminals, whose resistance can be adjusted according to a specific variation law. A potentiometer typically consists of a resistive element and a movable wiper. When the wiper moves along the resistive element, a resistance value or voltage related to the displacement is obtained at the output terminal. A potentiometer can be used as a three-terminal component or as a two-terminal component. The latter can be regarded as a variable resistor. Since its function in a circuit is to obtain an output voltage that has a certain relationship with the input voltage (applied voltage), it is called a potentiometer. A potentiometer is a type of variable resistor. It usually consists of a resistive element and a rotating or sliding system, i.e., a moving contact moves on the resistive element to obtain a partial voltage output. The function of a potentiometer is to adjust voltage (including DC voltage and signal voltage) and current magnitude. Structural features of a potentiometer: The resistive element of a potentiometer has two fixed terminals. By manually adjusting the shaft or slider, the position of the moving contact on the resistive element is changed, thereby changing the resistance value between the moving contact and any fixed terminal, thus changing the voltage and current magnitude. A potentiometer is an adjustable electronic component. It consists of a resistive element and a rotating or sliding system. When a voltage is applied across the two fixed contacts of the resistive element, changing the position of the contact on the resistive element via the rotating or sliding system allows a voltage related to the position of the moving contact to be obtained between the moving contact and the fixed contact. It is mostly used as a voltage divider, in which case the potentiometer is a four-terminal component. A potentiometer is basically a sliding rheostat. There are several styles, generally used for speaker volume control and laser head power adjustment. A potentiometer is an adjustable electronic component. It is a variable resistor used for voltage division. On the exposed resistive element, one or two movable metal contacts are pressed firmly. The contact position determines the resistance value between either end of the resistive element and the contact. Classified by material: wire-wound, carbon film, and solid-core potentiometers. Classified by the relationship between the output-to-input voltage ratio and the rotation angle: linear potentiometers (linear relationship) and functional potentiometers (curvilinear relationship). Main parameters include resistance value, tolerance, and rated power. Widely used in electronic equipment, such as for volume control in audio systems and receivers.

Buerklin electrical component parameters

1. Stable voltage refers to the stable voltage value generated across the terminals when the Zener diode passes the rated current. This value changes slightly with operating current and temperature. Due to differences in manufacturing processes, the stabilization voltage of Zener diodes of the same model is not completely consistent. 2. Reverse leakage current refers to the current passing through the Zener diode when it generates a stable voltage. Below this value, although the Zener diode can still stabilize voltage, the stabilization effect will deteriorate; above this value, as long as the rated power dissipation is not exceeded, it is permissible, and the stabilization performance will be better, but it will consume more electrical energy. 3. Dynamic resistance refers to the ratio of the change in voltage across the Zener diode to the change in current. This ratio changes with the operating current; generally, the larger the operating current, the smaller the dynamic resistance. 4. Rated power dissipation is determined by the allowable temperature rise of the chip, and its value is the product of the stable voltage and the maximum allowable current. 5. Temperature coefficient: If the temperature of the Zener diode changes, its stable voltage will also undergo slight changes. The relative change in voltage across the tube caused by a temperature change of 1℃ is the temperature coefficient (unit: %/℃). Generally speaking, stabilization voltages below 6V belong to Zener breakdown, and the temperature coefficient is negative; the temperature coefficient is positive. When the temperature rises, the depletion layer decreases. In the depletion layer, the valence electrons of atoms rise to higher energy levels, and a smaller electric field strength can excite valence electrons from atoms to produce Zener breakdown, so its temperature coefficient is negative. Avalanche breakdown occurs when the depletion layer is wider and the electric field strength is lower. An increase in temperature increases the vibration amplitude of lattice atoms, hindering the movement of carriers. In this case, only by increasing the reverse voltage can avalanche breakdown occur, so the voltage temperature coefficient of avalanche breakdown is positive. For applications with high requirements for power supply, two Zener diodes with opposite temperature coefficients can be connected in series for compensation. Due to mutual compensation, the temperature coefficient is greatly reduced. 8. Reverse leakage current refers to the leakage current generated by the Zener diode under the specified reverse voltage.

Buerklin electrical component characteristics

The main characteristics of circuit breakers include: rated voltage; rated current; tripping current setting range for overload protection and short-circuit protection; rated short-circuit breaking current, etc. Rated ultimate short-circuit breaking capacity refers to the ability of a low-voltage circuit breaker to operate normally again and break this short-circuit current once more after breaking the maximum three-phase short-circuit current at the output terminal of the circuit breaker. The circuit breaker does not guarantee whether it can normally connect and break thereafter; whereas rated service short-circuit breaking capacity refers to the ability of the circuit breaker to break normally multiple times when the maximum three-phase short-circuit current occurs at its output terminal. Rated service short-circuit breaking capacity is a breaking current value smaller than the rated ultimate short-circuit breaking current. Generally speaking, circuit breakers with three-stage protection functions—long-time delay for overload, short-time delay for short-circuit, and instantaneous action for short-circuit—can achieve selective protection. Most main lines (including the output terminals of transformers) use them as main protection switches. Circuit breakers without short-time delay for short-circuit function (only having long-time delay for overload and instantaneous action for short-circuit, i.e., two-stage protection) cannot provide selective protection and can only be used on branch circuits. "Marine Electrical Engineering" points out: For circuit breakers with three-stage protection, emphasis is placed on their service short-circuit breaking capacity value, while for circuit breakers used on branch lines, it should be ensured that they have sufficient ultimate short-circuit breaking capacity value. A common bias is to prefer larger values rather than appropriately suitable ones, believing that larger is safer. However, choosing excessively large values causes unnecessary waste. Therefore, there is no need for circuit breakers on branch lines to blindly pursue high service short-circuit breaking capacity indicators. For circuit breakers used on main lines, they must not only meet the requirements for rated ultimate short-circuit breaking capacity but also meet the requirements for rated service short-circuit breaking capacity. A circuit breaker is a basic low-voltage electrical appliance. Circuit breakers have overload, short-circuit, and undervoltage protection functions, providing the ability to protect lines and power sources. The main technical indicators are rated voltage and rated current. Circuit breakers have different functions depending on the application, with many varieties and specifications, and numerous specific technical indicators. Free tripping of circuit breakers: At any moment during the closing process of a circuit breaker, if the protection action connects the tripping circuit, the circuit breaker can reliably disconnect completely. This is called free tripping. Circuit breakers with free tripping can ensure rapid disconnection when a short-circuit fault occurs during closing, avoiding the expansion of the accident scope.

Buerklin electrical component applications

Light-emitting diodes are widely used in many fields. The following outlines their main applications: (1) Applications in consumer electronics: Light-emitting diodes are generally used as backlight sources for screens or for display and lighting purposes in consumer electronics. From large LCD TVs and computer monitors to media players MP3, MP4, and mobile phones, light-emitting diodes are used as screen backlights. (2) Applications in automobiles and heavy machinery: Light-emitting diodes are extensively applied in automobiles and heavy machinery. Turn signals, interior lighting, instrument panel lighting, headlights, indicator lights, brake lights, and tail lights in automobiles and heavy mechanical equipment all utilize light-emitting diodes. This is primarily because light-emitting diodes offer fast response times and long service life (the lifespan of a light-emitting diode is generally longer than that of the automobile or heavy machinery itself). (3) Applications in coal mines: Due to characteristics such as high efficiency, low energy consumption, long lifespan, and high luminous intensity compared to ordinary light-emitting devices, light-emitting diodes are used in miners' lamps and underground lighting equipment. Although not yet fully popularized, they will soon see widespread adoption, and light-emitting diodes will replace ordinary light-emitting devices in coal mining applications. (5) Urban decorative lighting: In today's bustling commercial era, neon lights are an important symbol of urban prosperity, but they have many drawbacks, such as insufficient lifespan. Therefore, replacing neon lights with light-emitting diodes offers many advantages. Compared to neon lights, light-emitting diodes not only have a longer lifespan but also feature energy savings, simple drive and control requirements, and maintenance-free operation. The replacement of neon lights by light-emitting diodes is an inevitable trend in the development of lighting equipment.

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