DXM DXM
DXM DXM

Thermistor NTC Applications for Effective Inrush Current Limiting

2024-07-01

NTC (Negative Temperature Coefficient) thermistors are crucial components in many electronic devices, known for their ability to effectively manage inrush current. This article will explore various applications of thermistor ntc in inrush current limiting, particularly in Switch Mode Power Supplies (SMPS), AC-DC power modules, DC-DC converters, and industrial inverters.

Thermistor NTC Applications in Inrush Current Limiting

Introduction

NTC (Negative Temperature Coefficient) thermistors are crucial components in many electronic devices, known for their ability to effectively manage inrush current. This article will explore various applications of thermistor ntc in inrush current limiting, particularly in Switch Mode Power Supplies (SMPS), AC-DC power modules, DC-DC converters, and industrial inverters.

Application s :

1. Inrush Current Limiting in Switch Mode Power Supplies (SMPS)

Switch Mode Power Supplies (SMPS) are popular due to their compact size, lightweight design, and high performance. When an SMPS is powered on, it experiences a high peak inrush current as the filter capacitor charges. This inrush current can reduce the lifespan of the capacitor, damage the power switch contacts, or destroy rectifying diodes, necessitating effective countermeasures.

NTC thermistors are widely used to limit the inrush current in SMPS, offering a low-cost and straightforward solution. Connecting an NTC thermistor even after the rectifier circuit yields similar benefits.

2. Inrush Current Limiting in AC-DC Power Modules

Power modules, integrating various power circuits and peripheral components, are termed built-in power supplies. AC-DC power modules consist of AC-DC rectifier circuits, DC-DC converters, and minimal external components, forming a space-saving optimized power system. An NTC thermistor effectively limits the inrush current applied to the input and output capacitors when powering on.

Inrush-Current-Limiting-in-AC-DC-Power-Modules

Figure : NTC thermistor for Inrush Current Limiting in AC-DC Power Modules

3. Inrush Current Limiting in DC-DC Converters

In DC power circuits like DC-DC converters, NTC thermistors serve as power thermistors to limit inrush current during the initial power-on phase when input and output capacitors are charging. The resistance of the NTC thermistor drops significantly after power-on, reducing power loss compared to using a fixed resistor.

NTC-thermistors-for-Inrush-Current-Limiting-in-DC-DC-Converters

Figure : Negative Temperature Coefficient NTC Thermistor for Inrush Current Limiting in DC-DC Converters

4. Inrush Current Limiting in Industrial Inverters

Induction motors, commonly used in factories, large facilities, and office buildings, drive fans, pumps, air conditioners, and other equipment. These motors, while simple and stable, have speeds dependent on frequency and require inverters for speed control. Motors with inverters, known as variable speed drives (VSDs), significantly reduce power consumption.

An inverter system comprises a converter section, an inverter section, and a DC link capacitor (filter capacitor) after the converter. At startup, the device charges, and an inrush current several times larger than the steady-state current fills the DC link capacitor. This inrush current can adversely affect the lifespan of the DC capacitor or damage semiconductor devices. To prevent this, an NTC thermistor (power thermistor) is connected.

Conclusion

NTC thermistors are essential in managing inrush current across various applications, including SMPS, AC-DC power modules, DC-DC converters, and industrial inverters. Their ability to effectively limit inrush current ensures the longevity and reliability of electronic components, making them indispensable in modern electronic systems. By integrating NTC thermistors, engineers can enhance the performance and safety of power systems.

Tags
PTC Thermistors
PTC Thermistors
PTC temperature sensor
PTC temperature sensor
temperature sensor manufacturers
temperature sensor manufacturers
ntc temp sensor
ntc temp sensor
temperature detection thermistor
temperature detection thermistor
NTC Thermistors
NTC Thermistors

Recommended for you

Image shows two PTC sensors.  Learn what is a PTC sensor and how these positive temperature coefficient thermistors are used in various applications.  They're shown with their leads and housings.

PTC Sensor: Understanding & Applications

PTC Sensor: Understanding & Applications
Definition Of PTC (Positive Temperature Coefficient):  Graph illustrating the relationship between temperature and resistivity, showing PTC behavior with distinct regions (I, II, III) and the effect of crystalline regions and fillers on resistivity.

Definition of PTC: Positive Temperature Coefficient Explained

Definition of PTC: Positive Temperature Coefficient Explained
A green, disc-shaped PTC thermistor, or PTC resistor, with two leads.  The markings '19P 101R' are visible.  Learn what is a PTC resistor and how a PTC thermistor functions.

What is a PTC Resistor? An Expert Guide

What is a PTC Resistor? An Expert Guide
Close-up of a DXM Electronics MZ10 thermistor PTC.  What are PTC thermistors used for?  These components are commonly used in overcurrent protection circuits and temperature sensing applications.

Thermistor PTC Applications Explain What are PTC Thermistors Used For?

Thermistor PTC Applications Explain What are PTC Thermistors Used For?
Close-up of a PTC thermistor;  learn how does a ptc thermistor work by understanding its temperature-dependent resistance.  DXM Electronics 0506 9R0.

How Does a PTC Thermistor Work? Understanding Key Functions

How Does a PTC Thermistor Work? Understanding Key Functions
Close-up of a green MZ23 50RM PTC thermistor material, showcasing the PTC Thermistors' compact disc-like design with visible lead wires.

PTC Thermistor Material: Selection & Applications

PTC Thermistor Material: Selection & Applications
Prdoucts Categories
FAQ
Price and Payment
How are the prices of your products determined?

Our product prices are based on a variety of factors, including order quantity, customization requirements, and market competition.

Price

The price will be quoted in US dollars.
1) For small order quantities and small packing, normally our quotation is based on the ex-works price. The cargo will be delivered by courier after being finished normally.
2) For bulk orders and large volumes, normally our quotation is based on the FOB price. Please inform us of your destination seaport and estimated quantity, and our representative will quote you the C&F or CIF price accordingly. If you feel our freight is higher than your expectation, you can recommend your shipping company to us. Our principal is looking for a shipping company with a good reputation that offers competitive freight costs and can deliver your cargo promptly.

Payment Terms

There are a number of different payment methods that can be used when you deal with us. Two are mostly used: T/T payment in advance for small values and irrevocable L/C at sight for large values.

Logistics
Shipment

1)Small order quantity and small packing:cargo may be arranged by courier;
2)Bulk order and big volume:shipment may be arranged by sea or by air as per customer’s requirements on FOB, C&F,CIF or LCL terms and do prompt shipment which is very important for our customers, so we do this matter seriously and we may arrange our shipment in time due to our rich experiences in this line. We may also accept the shipment on the term of freight prepaid or freight collect.

Can I change my shipping address?

Yes, you can contact our customer service team to modify the delivery address before order confirmation to ensure that the order can be accurately delivered to the address you specify.

You may also like

Glass Encapsulated KTY83 110 Sensor

KTY83-110 Sensor with Silicon Glass Thermistor

Discover the DXM KTY83-110 Sensor with Silicon Glass Thermistor, designed for precision temperature measurement. This reliable KTY sensor ensures optimal performance across various applications. Enhance your systems with our advanced technology for accurate, stable readings. Ideal for industry professionals seeking dependable solutions. Learn more today!

KTY83-110 Sensor with Silicon Glass Thermistor
Close-up view of multiple NTC Thermal Sensor MF52X units arranged in a grid.  The ntc temperature sensors are dark-colored and precisely positioned within a metallic fixture.

Bracket Type NTC Thermal Sensor MF52X for Precise Temperature Measurement

Experience precision with the DXM Bracket Type NTC Thermal Sensor MF52X. Ideal for accurate temperature measurement, these high-quality NTC temperature sensors ensure reliability and efficiency. Enhance your systems with this state-of-the-art NTC sensor. Keywords: Thermal Sensor, NTC Sensor, NTC temperature sensors.

Bracket Type NTC Thermal Sensor MF52X for Precise Temperature Measurement
Close-up view of glass thermistors MF58E, showcasing their red and blue colored body with metallic end caps.These glass thermistors are used for temperature control.

Glass Thermistors MF58E for High-Precision Applications

Introducing DXM's Glass Thermistors for High-Precision Applications. Our glass encapsulated thermistor provides reliable temperature sensing with unmatched NTC resistor precision. Ideal for demanding environments, DXM's glass thermistors ensure optimal performance and durability. Enhance your systems with the industry-leading choice for accurate temperature control.

 

Glass Thermistors MF58E for High-Precision Applications
A single thermistor sensor MF52A, it is a type of NTC sensors used for temperature sensing applications.

High Precise NTC Sensors for Temperature Measurement and Control

Discover DXM's High Precise NTC Sensors, designed for accurate temperature measurement and control. Our NTC sensors offer reliable performance, making them ideal for various applications. Enhance system efficiency with our top-quality sensors. Explore the benefits of DXM's unmatched expertise in NTC technology today.

High Precise NTC Sensors for Temperature Measurement and Control
A single green WMZ12A 75S PTC thermistor with silver leads.  The thermistor is a small, round component used in electronic circuits.

WMZ12A 75S PTC Thermistors for Over-Current and Over-Load Protection

Introducing the DXM WMZ12A 75S PTC Thermistors, designed for superior over-current and over-load protection. Ideal for safeguarding electrical systems, these thermistors ensure reliable performance and longevity. Elevate your circuit protection with DXM's cutting-edge solution.

WMZ12A 75S PTC Thermistors for Over-Current and Over-Load Protection
A close-up shot of an NTC SMD sensor. The sensor is grey and rectangular with white edges. The sensor is isolated on a white background.

SMD Sensors: Advanced Temperature Sensing Excellence

Discover unparalleled precision with DXM's Advanced SMD Sensors, the next-generation solution for temperature sensing excellence. Crafted for optimal performance, this SMD sensor ensures accurate and reliable measurements in diverse applications. Trust DXM's expertise in NTC SMD sensors to elevate your projects with cutting-edge technology and unmatched efficiency. Experience the future of temperature monitoring today.

SMD Sensors: Advanced Temperature Sensing Excellence
Thermistor PTC MZ11, a type of Positive Temperature Coefficient thermistor, exhibits a sharp increase in resistance when its temperature reaches a certain threshold.

Thermistor PTC MZ11 Series for Light Efficient Design

Key Features of Thermistor PTC MZ11 series

● Efficient Startup: Time-delayed startup reduces wear, extending lighting system lifespan.

● Versatile Use: Compatible with fluorescent lamps, ballasts, and energy-saving lamps.

● Reliable: Handles 100,000+ switching cycles for long-term performance.

● Temperature Range: Operates from -25°C to +125°C in various environments.

● Cost-effective, RoHS Compliant: Competitive price, meets high safety and environmental standards.

Thermistor PTC MZ11 Series for Light Efficient Design
A green PTC Thermistor MZ12 with lead wires and the code DXM 05151 3H152 printed on it.

PTC Thermistors for Ballast Electronic and Energy Saving Lighting Intelligent Preheat Start MZ12 | DXM

Key Features of PTC thermistors MZ12 series:
 Intelligent Preheat Start: Extending lamp life by up to 10 times.
● Competitive Price, Small size.
● Energy Efficient: Contributing to long-term energy savings.
● High Reliability: With over 100,000 switching cycles.
● Environmentally Friendly,Versatile Compatibility.

● Combination of PTC Resistor and Varistor,no temperature-increasing or power-consuming after preheating.

PTC Thermistors for Ballast Electronic and Energy Saving Lighting Intelligent Preheat Start MZ12 | DXM

Get in Touch

Discover premium thermistors, sensors, and resistors tailored to your needs.Our dedicated team of experts is available to assist with product selection, technical queries, and after-sales service. Contact us for custom solutions and experience exceptional customer support.

Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_301 not exceed 150 characters
Please enter your content not exceed 500 characters
Contact customer service