gmc-i messtechnik electrical components Germany gmc-i messtechnik models gmc-i messtechnik prices

gmc-i messtechnik electrical components are constituent parts of electronic components and small machines and instruments. They often consist of several parts and are interchangeable within similar products. The term commonly refers to certain parts in the electrical, radio, and instrumentation industries, serving as a general term for electronic devices such as capacitors, transistors, hairsprings, and mainsprings. Common examples include diodes. Electronic components include: resistors, capacitors, inductors, potentiometers, electron tubes, heat sinks, electromechanical components, connectors, discrete semiconductor devices, electroacoustic devices, laser devices, electronic display devices, optoelectronic devices, sensors, power supplies, switches, micromotors, electronic transformers, relays, printed circuit boards, integrated circuits, various circuits, piezoelectric materials, crystals, quartz, ceramic magnetic materials, base substrates for printed circuits, specialized materials for electronic functional processes, electronic adhesive (tape) products, electronic chemical materials and parts, etc.

gmc-i messtechnik electrical component features

Self-resetting fuses are characterized by high breaking current capacity, capable of interrupting AC currents and even higher currents. This type of fuse has a very significant current-limiting effect; when the instantaneous current approaches 173 kA, it can rapidly limit the current. The structure of a self-resetting fuse mainly consists of current terminals (also called electrodes), mica glass (filler), insulating tube, fusible element, piston, argon gas, and housing. The housing of the self-resetting fuse is generally made of stainless steel. The stainless steel sleeve is separated from the internal beryllium oxide ceramic insulating tube by mica glass, which serves as both filler and insulator. Self-resetting fuses operate based on the characteristic of sodium metal, whose resistance increases sharply at high temperatures. Under normal operating conditions, current flows from the left current terminal, through the sodium metal fusible element in the fine holes of the beryllium oxide ceramic insulating tube, to the right current terminal, forming a current path. When a short-circuit fault occurs, the short-circuit current heats the sodium metal, vaporizing it into a high-temperature, high-pressure plasma state, which sharply increases its resistance, thereby achieving current limiting. At this point, the high pressure generated by the vaporized fusible element pushes the piston to the right, compressing the argon gas. After the circuit breaker interrupts the short-circuit current limited by the self-resetting fuse, the temperature of the sodium vapor drops, and the pressure decreases accordingly. The previously compressed argon gas condenses back into liquid and solid states, and its resistance value returns to the original level, allowing for reuse. Regarding the wiring of self-resetting fuses, they are often used in series with circuit breakers. An additional resistor is connected in parallel with the fuse itself to suppress overvoltage that may occur during interruption. During normal operation, the self-resetting fuse is in a low-resistance state, and only a small current flows through the parallel resistor. When a line fault occurs, the self-resetting fuse enters a high-resistance state. The parallel resistor can absorb the resulting overvoltage and maintain the operating current required for the circuit breaker trip unit, ensuring reliable interruption by the circuit breaker. Therefore, the current interrupted by the circuit breaker is effectively the current-limited value of the self-resetting fuse.

gmc-i messtechnik electrical component functions

The starter solenoid switch is a key component of the starter motor, and its design quality directly affects the reliability of the starter. The starter solenoid switch has two functions: first, to connect the main circuit to rotate the starter motor; second, to push the drive gear out via the shift fork to engage with the engine flywheel ring gear. Therefore, the solenoid switch is required to have appropriate attraction force, appropriate stroke, and contacts capable of reliably switching high currents. Additionally, it is required to minimize volume and weight as much as possible. Based on these characteristics, the contact structure of solenoid switches generally adopts a contact form where the moving contact is made into a bridge or disk shape to provide a larger heat dissipation area and thermal capacity. The magnetic system mostly adopts a solenoid electromagnet structure to meet the requirements for corresponding stroke, attraction force, small volume, and light weight. The moving iron core of the solenoid switch can move smoothly within a brass bushing equipped with a solenoid coil. The moving iron core pull rod is connected to the one-way clutch via the shift fork. Under the action of the return spring, the moving iron core remains in the initial non-operating position. During starting, the starter drive gear needs to move forward by approximately 12-30mm. Therefore, when the solenoid switch begins to engage, a large magnetomotive force is required to generate the necessary initial attraction force. After engagement, the air gap decreases, and the electromagnetic attraction force increases sharply, far exceeding the force required to maintain the engaged state. For this reason, the solenoid switch uses two coils (an attraction coil and a holding coil). Initially, both the attraction coil and the holding coil jointly generate electromagnetic attraction. After the switch contacts engage, the attraction coil automatically disengages from the operating state, and the holding coil alone maintains the switch in the engaged state. The holding coil current is relatively small, allowing it to be wound with thinner wire. This reduces the volume of the solenoid switch while achieving reasonable attraction force matching. To ensure the reliability of the starter motor, particular attention must be paid to the design quality of the solenoid switch.

gmc-i messtechnik electrical component parameters

1. Stable voltage refers to the stable voltage value generated across the 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 identical. 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 regulate voltage, the regulation effect will deteriorate; above this value, as long as the rated power dissipation is not exceeded, it is permissible, and the voltage regulation 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 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 the movement of carriers. In this case, avalanche breakdown can only occur if the reverse voltage is increased; therefore, the voltage temperature coefficient of avalanche breakdown is positive. For applications with high requirements for power supplies, two Zener diodes with opposite temperature coefficients can be connected in series for compensation. Due to mutual compensation, the temperature coefficient is greatly reduced. 14. Reverse leakage current refers to the leakage current generated by the Zener diode under a specified reverse voltage.

Weidou Intelligent Technology specializes in selling German gmc-i messtechnik connectors, gmc-i messtechnik switches, gmc-i messtechnik relays, gmc-i messtechnik controllers, gmc-i messtechnik plugs, gmc-i messtechnik sensors, gmc-i messtechnik resistors, gmc-i messtechnik capacitors, gmc-i messtechnik buses, gmc-i messtechnik modules, gmc-i messtechnik cables, gmc-i messtechnik power supplies, gmc-i messtechnik interfaces, gmc-i messtechnik gateways, gmc-i messtechnik circuit breakers, gmc-i messtechnik original imports from Germany. We welcome inquiries and orders from users.