Schmidt-Strahl electrical components Germany Schmidt-Strahl model Schmidt-Strahl price

Schmidt-Strahl electrical component is a sensor resistor whose resistance changes with temperature. According to different temperature coefficients, it is divided into positive temperature coefficient thermistors and negative temperature coefficient thermistors. The resistance of a positive temperature coefficient thermistor increases as the temperature rises, while the resistance of a negative temperature coefficient thermistor decreases as the temperature rises; both belong to semiconductor devices.

Schmidt-Strahl electrical component function

(1) often compares the function of sensors to the 5 major sensory organs of humans: photosensitive sensor - vision, acoustic sensor - hearing, gas-sensitive sensor - smell, chemical sensor - taste, pressure-sensitive, temperature-sensitive, and fluid sensors - touch. (2) Classification of sensitive elements: Physical type, based on physical effects such as force, heat, light, electricity, magnetism, and sound. Chemical type, based on the principles of chemical reactions. Biological type, based on molecular recognition functions such as enzymes, antibodies, and hormones. Usually, according to their basic sensing functions, they can be divided into ten major categories: thermal-sensitive elements, photosensitive elements, gas-sensitive elements, force-sensitive elements, magnetic-sensitive elements, humidity-sensitive elements, acoustic-sensitive elements, radiation-sensitive elements, color-sensitive elements, and taste-sensitive elements (some have also classified sensitive elements into 48 categories).

Schmidt-Strahl electrical component applications

The structure and characteristics of Schottky diodes make them suitable for high-frequency rectification in low-voltage, high-current output applications, for detection and mixing at very high frequencies (such as X band, C band, S band, and Ku band), and for clamping in high-speed logic circuits. In addition to the characteristic parameters of ordinary PN junction diodes, the electrical parameters of Schottky diodes used for detection and mixing include intermediate frequency impedance, voltage standing wave ratio, and noise figure. The Schottky barrier diode is a low-power, ultra-high-speed semiconductor device. Its most significant feature is an extremely short reverse recovery time (which can be as small as a few nanoseconds). It is mostly used as a high-frequency, low-voltage, high-current rectifier diode, freewheeling diode, and protection diode, and is also used as a rectifier diode and small-signal detection diode in microwave communication circuits. It is relatively common in communication power supplies, variable frequency drives, etc. A typical application is in the switching circuit of a bipolar junction transistor BJT, where a Shockley diode is connected to the BJT for clamping, so that the transistor is actually close to the cutoff state when in the conduction state, thereby improving the switching speed of the transistor. The main feature of a Schottky diode is its smaller forward voltage drop. At the same current, its forward voltage drop is much smaller. In addition, its recovery time is short. It also has some disadvantages: lower withstand voltage and slightly larger leakage current. These factors must be comprehensively considered during selection.

Schmidt-Strahl electrical component classification

Classification by working principle or structural characteristics of relays: (1) Electromagnetic relay: An electrical relay that works by utilizing the attractive force generated between the electromagnet core and the armature by the current in the input circuit. (2) Solid-state relay: A relay in which electronic components perform their functions without mechanical moving parts, providing isolation between input and output. (3) Temperature relay: A relay that operates when the external temperature reaches a set value. (4) Reed relay: A relay that uses the action of reeds sealed in a tube, which have the dual function of contact springs and armature magnetic circuits, to open, close, or switch lines. (5) Time relay: A relay whose output part delays or limits the time to a specified duration before closing or opening its controlled circuit when an input signal is applied or removed. (6) High-frequency relay: A relay used for switching high-frequency and RF lines with minimal loss. (7) Polarized relay: A relay that operates due to the combined effect of a polarizing magnetic field and the magnetic field generated by the control current passing through the control coil. The operating direction of the relay depends on the direction of the current flowing through the control coil. (8) Other types of relays: Such as optical relays, acoustic relays, thermal relays, instrument relays, Hall effect relays, differential relays, etc.

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