MEGA electrical components German MEGA models MEGA prices

MEGA electrical components refer to electronic components that generate resonant frequencies, commonly divided into quartz crystal resonators and ceramic resonators. They function to generate frequencies and feature stability and good anti-interference performance, widely used in various electronic products. The frequency accuracy of quartz crystal resonators is higher than that of ceramic resonators, but the cost is also higher. Resonators mainly serve the role of frequency control; all electronic products involving frequency transmission and reception require resonators. Resonator types can be classified by form factor into through-hole and surface-mount types.

MEGA electrical component characteristics

Resolution refers to the ability of a sensor to detect the smallest change in the measured quantity. That is, if the input changes slowly from a non-zero value, the sensor output will not change when the input change does not exceed a certain value, meaning the sensor cannot resolve this change in the input. The output only changes when the input change exceeds the resolution. Typically, the resolution at different points within the full-scale range of a sensor is not identical; therefore, the maximum change in input within the full scale that causes a step change in output is commonly used as the indicator for resolution. If this indicator is expressed as a percentage of the full scale, it is termed resolution. Resolution has a negative correlation with sensor stability.

MEGA electrical component parameters

1. Stable voltage refers to the stable voltage value generated across the terminals of a Zener diode when it passes the rated current. This value varies 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 deteriorates; above this value, as long as the rated power dissipation is not exceeded, it is permissible, and the stabilization performance improves, though it consumes more electrical energy. 3. Dynamic resistance refers to the ratio of the voltage change to the current change across the Zener diode terminals. This ratio varies with operating current; generally, the greater 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 also undergoes a slight change. The relative change in voltage across the tube terminals caused by a temperature change of 1℃ is the temperature coefficient (unit: %/℃). Generally speaking, stabilization voltages below 6V belong to Zener breakdown, where 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 the atoms to produce Zener breakdown; therefore, 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 carrier movement. In this case, avalanche breakdown can only occur by increasing the reverse voltage; therefore, the voltage temperature coefficient for avalanche breakdown is positive. For applications with high power supply requirements, two Zener diodes with opposite temperature coefficients can be connected in series for compensation. Due to mutual compensation, the temperature coefficient is significantly reduced. 16. Reverse leakage current refers to the leakage current generated by the Zener diode under the specified reverse voltage.

MEGA 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) Easy to process into complex shapes and suitable for mass production; (6) Good stability and strong overload capacity.

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