NTC 5d-15 thermistor Inrush Current Limiter
● Reliable Inrush Current Limiter: Protecting electronic circuits from damage.
● Competitive Price, Cost-Effective Solution: Reducing overall system costs.
● Wide Operating Temperature: From -55°C to +200°C, suitable for diverse environments.
● High Durability, Compact Design: Small size encapsulated in phenolic resin, ensuring long-lasting protection.
● High Current Capacity: Maximum steady-state current of 6A, ideal for high-power applications.
NTC 5D-15 Thermistor Introduction
The NTC 5D-15 thermistor is a reliable inrush current limiter essential for protecting electronic circuits. With a wide operating temperature range and high durability, it’s ideal for applications like energy-saving lamps, CRT monitors, and industrial equipment. The mf72 5d15 thermistor ensures efficient operation by controlling initial current surges, enhancing device longevity and safety.
MF72 NTC 5D 15 thermistor Marking of Part Number:
2.R25 resistance:5-5Ω
3.Dimension:D-Diameter
4.Chip diameter:15 - Φ15mm
Specification&part no. of MF72 NTC 5D-15 Thermistor:
| Item | Part No. | Resistance R 25（Ω） |
Max Steady State Current (A) | Approx. Resistance Value at Maximum Current (Ω) | Dissipation Factor | Thermal Time Constant (sec) | Dimensions (mm) | ||
| (mW/oC) | Dmax | Tmax | F±1 | ||||||
| 1 | MF72 5D15 | 5 | 6 | 0.112 | 20 | 76 | 17.5 | 6 | 10/7.5 |
MF72-5d15 Dimensions and Materials
MF72 5d15 Dimensions
| Item | Parameter | Dimension |
| 1 | Diameter (Dmax) | 17.5mm |
| 6 | Thickness (Tmax) | 6 mm |
| 4 | Lead Length (L1) | 20 ± 0.5 mm |
| 5 | Lead Length (L2) | 5 ± 2 mm |
| 3 | Lead Spacing (F1) | 10 ± 1 mm |
| 3 | Lead Spacing (F2) | 7.5 ± 1 mm |
| 7 | Lead Diameter (d) | 0.8 mm |
MF72 5d15 Materials
| Item | Part | Description |
| 1 | Encapsulation Material | Phenolic Resin |
| 2 | Leads | Tinned Copper-Clad Steel Wire |
| 3 | Color | Black |
NTC 5dD 15 Thermistor Datasheet
| Item | Description | 5d 15 Main Parameters |
| 1 | Zero Power Resistance at 25°C（Ω）： | 5Ω ± 20% |
| 2 | Maximum Steady State Current（A）： | 6A |
| 3 | Dissipation Factor（mW/℃）： | 20 mW/°C |
| 4 | Thermal Time Constant（S）： | 76 seconds |
| 5 | Operating Temperature Range（℃）： | -55°C to +200°C |
| 6 | B value of thermistor（K）： | B(25/50) =2700K±10% |
Applications of NTC 5D-15 Thermistor
| Item | 5d-15 Applications | Description |
| 1 | Electronic Ballasts | Used in electronic ballasts for fluorescent lamps to limit the inrush current and prevent damage to the circuits. |
| 2 | Energy-saving Lamps | Enhances the efficiency and lifespan of compact fluorescent lamps (CFLs) by controlling the initial surge of current when the lamp is switched on. |
| 3 | CRT Televisions and Monitors | Essential in demagnetization (degaussing) circuits, protecting the display from magnetic interference and ensuring image clarity. |
| 4 | Communication Equipment | Provides overcurrent and overload protection in communication devices, ensuring reliable operation and safeguarding sensitive components. |
| 5 | General Circuit Protection | Offers overcurrent and overload protection in various electronic circuits, including power supplies and battery chargers, by limiting excessive current that could damage components. |
| 6 | Motor Start Protection | Used in electric motors to control the initial surge of current when the motor starts, thereby extending the motor's life and preventing electrical faults. |
| 7 | Welding Machines | Protects welding equipment from overcurrent and overload situations, ensuring safe and stable operation. |
Key Features and Benefits
The NTC 5D-15 thermistor stands out due to several features and benefits:
High Accuracy:
Provides precise temperature measurement and control, essential for sensitive electronic applications.
Wide Operating Temperature Range:
Can function effectively in extreme temperatures, from -55°C to +200°C, making it suitable for diverse environments.
Durability:
Encapsulation in phenolic resin enhances durability, protecting the thermistor from physical damage and environmental factors.
Fast Response Time:
A thermal time constant of 76 seconds ensures quick response to temperature changes, improving the efficiency of the circuit's protection mechanisms.
High Steady-State Current Capacity:
Can handle a maximum steady-state current of 6A, making it suitable for high-power applications.
Cost-Effective:
Provides an economical solution for temperature monitoring and control, reducing overall system costs.
Comparison with Other Thermistors
To understand the advantages of the ntc 5d 15 thermistor, it's helpful to compare it with other similar thermistors. Below is a comparative table:
| Parameter | mf72 5d15 | mf72 10d 15 ntc | mf72 10d20 thermistor |
| Resistance at 25°C (Ω) | 5 | 10 | 20 |
| Max Steady State Current (A) | 6 | 7 | 4 |
| Dissipation Factor (mW/°C) | 20 | 22 | 21 |
| Thermal Time Constant (s) | 76 | 75 max | 86 |
Installation and Usage Guidelines
Proper installation and usage of the NTC 5D-15 thermistor are crucial for optimal performance. Here are some guidelines:
Soldering:
Avoid excessive heat during soldering. The recommended soldering temperature is 250°C ± 10°C for no more than 3 seconds.
Mounting:
Ensure the leads are securely mounted and free from mechanical stress. Use appropriate fixtures to prevent movement during operation.
Circuit Design:
Incorporate the thermistor in the circuit where it can effectively monitor and control the desired temperature range. Position it away from heat sources that may affect its accuracy.
Environmental Considerations:
Protect the thermistor from corrosive environments and excessive moisture, which could degrade its performance over time.
Case Studies and Real-world Applications
To further illustrate the importance and effectiveness of the NTC 5D-15 thermistor, let's explore some real-world applications:
Consumer Electronics:
In a popular brand of energy-saving lamps, the mf72 5d15 is used to prevent initial current surges, significantly increasing the lamp's lifespan.
Industrial Equipment:
A leading manufacturer of welding machines integrates the ntc 5d 15 thermistor to provide overcurrent protection, ensuring safe and reliable operation under heavy-duty conditions.
Automotive Industry:
In electric vehicles, the 5d 15 thermistor is used in the battery management system to monitor temperature and prevent thermal runaway, enhancing vehicle safety.
Future Trends and Innovations
The demand for NTC thermistors, including the NTC 5D-15, is expected to grow with advancements in technology and increasing emphasis on energy efficiency. Future trends include:
Smart Grids:
Integration of NTC thermistors in smart grid technology to monitor and control temperature in power distribution systems, enhancing reliability and efficiency.
Renewable Energy:
Use in solar panels and wind turbines to monitor temperature and optimize performance, contributing to sustainable energy solutions.
IoT and Smart Devices:
Expansion of NTC thermistor applications in Internet of Things (IoT) devices for real-time temperature monitoring, improving device safety and functionality.
5D-15 Thermistor Electrical properties and requirements
| Term Name | Description | Performance Requirements |
| Zero Power Resistance | The resistance value measured at 25℃ when the change in resistance due to internal heating of the 5d 15 ntc can be ignored relative to the total measurement error. | See Electrical Characteristics Parameters |
| Thermistor B value | The B value of thermistor can be calculated using the zero power resistance at 25℃ and 50℃. The formula is:
|
See Electrical Characteristics Parameters |
| Maximum Steady-State Current | The maximum continuous current allowed to be applied to the 5d 15 thermistor at an ambient temperature of 25℃. | See Electrical Characteristics Parameters |
| Thermal Dissipation Coefficient | The ratio of the change in power dissipated in the 5d-15 to the corresponding change in thermistor temperature at a specified temperature. Unit: mW/℃ | See Electrical Characteristics Parameters |
| Thermal Time Constant | The time required for the thermistor to change its temperature by 63.2% of the difference between its initial and final temperatures under zero power conditions. | See Electrical Characteristics Parameters |
| Operating Temperature | The allowable temperature range for the ntc 5d 15 to operate continuously and long-term. | -55 to +200℃ |
| Rated Temperature | The temperature variation range when operating with the working current. | -55 to +200℃ |
| Load Durability | After testing the ntc 5d 15 thermistor at maximum steady-state current for 1000±2h at room temperature, it returns to its original state at room temperature. | No visible damage, maximum resistance change rate within ±15%. |
| Rapid Temperature Change | Cycling storage at Ta=﹣55℃±3℃ and Tb=200±2℃ for 30 minutes each, 5 cycles, then returning to original state at room temperature. | No visible damage, maximum resistance change rate within ±15%. |
| Steady-State Humidity | Storage at 40±2℃ with 93±3% relative humidity for 48±2 hours, then 1 hour in normal state. | No visible damage, clear markings, no breakdown or arcing, insulation resistance greater than 100MΩ, maximum resistance change rate within ±15%. |
| Lead Strength | Axial force of 20N applied to the lead for 10 seconds. | No visible damage, maximum resistance change rate within ±15%. |
| Solder Heat Resistance | The thermistor leads are immersed in solder at 250±10℃, 6mm from the resistor body for 3 seconds, then restored to original state at room temperature. | No visible damage, maximum resistance change rate within ±15%. |
| Solderability | Leads immersed in solder at 250±10℃ for 3 seconds. | Solder coverage area greater than 95%. |
| Current Surge | Thermistor withstands 2000 current surges at maximum steady-state current for 15 seconds each, then restored to original state. | Maximum resistance change rate within ±15%. |
| Voltage Withstanding | Apply AC1500V voltage for 1 minute between resistor lead and insulating layer. | No breakdown or arcing. |
| Insulation Resistance | Apply DC1000V voltage for 1 minute. | ≥500MΩ. |
Conclusion
The NTC 5D-15 thermistor is a versatile and reliable component essential for limiting surge current of various electronic applications. Its durability, and wide operating range make it a valuable asset in industries ranging from consumer electronics to industrial equipment.
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