Perhaps clamping diode ie a TVS ( transient voltage suppression ) .phyzguy said:
An inrush current limiting device is a component used to prevent the high initial surge of current that occurs when electrical equipment is first turned on. This surge can potentially damage components or trip circuit breakers, so the device helps manage and reduce this initial surge to protect the system.
An NTC (Negative Temperature Coefficient) thermistor works by initially presenting a high resistance when cold, which limits the inrush current. As current flows through the thermistor, it heats up and its resistance decreases, allowing normal operating current to pass through with minimal resistance.
Using an inrush current limiter offers several advantages, including protecting sensitive components from damage due to high inrush currents, preventing circuit breakers from tripping, reducing mechanical stress on electrical contacts, and extending the lifespan of the equipment.
There are several types of inrush current limiting devices, including NTC thermistors, PTC (Positive Temperature Coefficient) thermistors, fixed resistors, and electronic inrush current limiters. Each type has its own specific applications and benefits, depending on the requirements of the electrical system.
To select the right inrush current limiting device, you need to consider factors such as the maximum inrush current, the normal operating current, the operating voltage, the thermal characteristics, and the physical size constraints of the device. Consulting datasheets and manufacturer guidelines can help in making an informed decision based on these parameters.