The NTC 5D 15 Datasheet is your key to understanding a crucial component in modern electronics: the NTC thermistor. Specifically, the “5D-15” refers to a particular type of negative temperature coefficient (NTC) thermistor designed for inrush current limiting. Analyzing the NTC 5D 15 Datasheet is vital for designing reliable and robust power supplies and electronic circuits.
Decoding the NTC 5D 15 Datasheet: Functionality and Applications
An NTC thermistor, like the 5D-15, is a resistor whose resistance decreases as its temperature increases. The “5D-15” designation tells us some key characteristics: “5D” typically refers to a specific series or family of thermistors made by a manufacturer, and “15” indicates the resistance value at a specified temperature (usually 25°C, room temperature), expressed in Ohms. So, the NTC 5D 15 Datasheet provides all the electrical and thermal characteristics of this specific component, allowing engineers to predict its behavior in a circuit.
These thermistors are primarily used for inrush current limiting. When an electronic device is first switched on, components like capacitors in the power supply appear as a short circuit, drawing a very high initial current. This inrush current can damage components, blow fuses, or even reduce the lifespan of the device. The NTC 5D 15 is placed in series with the power supply input. At room temperature, its resistance is high enough to limit the inrush current. As current flows through the thermistor, it heats up, causing its resistance to decrease. This allows the device to operate normally after the initial surge is suppressed. This is very important for:
- Power supplies
- Motor drives
- Audio amplifiers
To further illustrate the usage, consider these key parameters found in the NTC 5D 15 Datasheet:
- Resistance at 25°C (R25): 5 Ohms (as the “15” indicates, but datasheets provide the *actual* tested values).
- B-value: A measure of how much the resistance changes with temperature.
- Maximum Steady State Current: The maximum current the thermistor can handle continuously without overheating.
- Maximum Capacitance: The max capacitance the thermistor can work with
The table below summarizes the information:
| Parameter | Description |
|---|---|
| R25 | Resistance at 25°C |
| B-Value | Temperature sensitivity |
For detailed specifications, performance graphs, and safety certifications, always refer to the official NTC 5D 15 Datasheet from a reputable manufacturer. This datasheet contains vital information for selecting the correct thermistor for your specific application.