Accessibility Links

Skip to main contentAccessibility help
Accessibility feedback
Pi Day 2026
Pi Day 2026
Go to Google home
Press / to jump to the search box
Choose what you’re giving feedback on
  • Delete
  • See more
  • Delete
    • See more
    • Report inappropriate predictions
    Quick Settings
    Sign in

    Filters and Topics

    AI Mode
    All
    Images
    Shopping
    Videos
    Forums
    Short videos
    More
    News
    Books
    Web
    Maps
    Tools
    Any time
    Any time
    Past hour
    Past 24 hours
    Past week
    Past month
    Past year
    Custom range...
    Custom date range
    Go
    All results
    All results
    Verbatim
    Advanced Search
    About 245,000 results (0.41s) 
    Ctrl+Shift+X to select

    Refine results

    • Stores
      • DigiKey
      • eBay
      • Jameco.com
      • Walmart
      See more
    • Price
      • Under $500
      • Over $500
      • $
        Please provide a valid price.
        $
        Please provide a valid price.
    • Sort by
      • Price: low to high
      • Price: high to low
    • Resistance Tolerance
      • ±20％
      • ±10％
      • ±1%
      • ±2%
      See more
    • Max Resistance
      • Under 2.5 Ω resistance
      • 2.5 – 16 Ω resistance
      • 16 – 100 Ω resistance
      • Over 100 Ω resistance
    • Free shipping
      • Free shipping
    • Brand
      • GE
      • TDK
      • Vishay
      • Panasonic
      See more
    Failed to load more results. Please try again later.
    Nearby
    Replacement
    Buy
    DigiKey
    Resistors
    For Sale
    Under $500
    eBay
    New
    Used
    ±20％
    ±10％
    ±1%
    ±2%
    ±5％
    Jameco.com
    Small business
    Walmart
    2.5 – 16 Ω resistance
    Over 100 Ω resistance
    16 – 100 Ω resistance
    Under 2.5 Ω resistance
    Free shipping
    Newark
    Mouser Electronics
    Electronix Express

    Search Results

    AI Overview

    An AI Overview is not available for this searchCan't generate an AI overview right now. Try again later.
    AI Overview
    Thermistor: NTC vs PTC Thermistors to limit Inrush Current | DXM
    NTC (Negative Temperature Coefficient) thermistors act as inrush current limiters in power circuits by providing high initial resistance when cold, reducing current spikes. As current flows, the component self-heats, causing its resistance to drop significantly for efficient, low-power operation. They are ideal for protecting capacitor-laden electronic circuits. 
    Key Aspects of NTC Thermistors for Surge Protection 
    • How They Work: In the "cold start," high resistance limits the sudden, high inrush current that occurs when electronic devices are turned on. As the device warms, the resistance falls to a low level, which does not disrupt normal operation.
    • Protection Application: NTC thermistors are commonly placed in series on the input of power supplies, switching power supplies, and inverters to protect diodes and capacitors from damage during power-on.
    • Advantages over Fixed Resistors: Unlike fixed resistors, which dissipate power constantly, NTC thermistors offer lower power losses during steady-state operation because their resistance becomes very small.
    • Selection Factors: Key factors include maximum steady-state current, resistance at
      25∘C25 raised to the composed with power cap C
      25∘𝐶
       (
      R25cap R sub 25
      𝑅25
      ), and maximum capacitance allowed at specific input voltages.       
    Typical Applications 
    • Power Supplies: Switching power supplies (SMPS) and battery chargers.
    • Industrial: Motor soft-starts, transformers, and heating systems.
    • Consumer Electronics: Powering up appliances to prevent tripped circuit breakers. 
    High-performance, high-current NTC thermistors (like the MegaSurge series) offer robust solutions to modern power surge problems. 
    • #1780 NTC Inrush Current Protection
      Feb 21, 2024 — all right pulled it out of pulled it out of some some piece of equipment um and I've gone through switching power supplies. before...
      YouTube·IMSAI Guy
      11m
    • How to Use NTC Thermistors for Inrush Current Limiting
      However, a fixed resistor always causes a power loss and a decrease in performance. An NTC thermistor limits an inrush current wit...
      TDK Corporation
    • How They Work and When to Use Them for Inrush Current Limiting.
      Aug 15, 2025 — An NTC thermistor combats this problem in two phases: * Cold Start: High initial resistance limits the surge of current. * Warm Op...
      Poly Electronics
    • MegaSurge Series: Inrush Current Limiting NTC Thermistors | Ametherm
      The MegaSurge series of thermistors has the following benefits: * UL recognition for ensured safety * One-component solution * Red...
      Ametherm
    • NTC Series Circuit Protection Power Thermistor Resistor In Rush ...
      NTC thermistor for surge suppression is a high power round chip thermistor. and the NTC thermistor initial resistance value is lar...
      eBay
    • #1780 NTC Inrush Current Protection
      Feb 21, 2024 — all right pulled it out of pulled it out of some some piece of equipment um and I've gone through switching power supplies. before...
      YouTube·IMSAI Guy
      11m
    • How to Use NTC Thermistors for Inrush Current Limiting
      However, a fixed resistor always causes a power loss and a decrease in performance. An NTC thermistor limits an inrush current wit...
      TDK Corporation
    • How They Work and When to Use Them for Inrush Current Limiting.
      Aug 15, 2025 — An NTC thermistor combats this problem in two phases: * Cold Start: High initial resistance limits the surge of current. * Warm Op...
      Poly Electronics
    Show all
    Dive deeper in AI Mode
    AI can make mistakes, so double-check responses
    Share
    This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply.
    Facebook
    WhatsApp
    X
    Email
    Click to copy link
    Share link
    Link copied
    Share
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedbackReport a problemClose
    Positive feedback
    Negative feedback
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedbackReport a problemClose
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedbackReport a problemClose
    Show more
    My Ad Center

    Inrush Current Limit Surge Suppress Power NTC Thermistors


    amwei
    https://amwei.com › NTC Thermistors
    amwei
    https://amwei.com › NTC Thermistors
    Jun 15, 2024 — Power NTC thermistor limits surge current by functioning as a power resistor which drops from a high cold resistance to a low hot resistance ...Read more

    Using an NTC Thermistor as a Surge Suppressor


    Homemade Circuit Projects
    https://www.homemade-circuits.com › using-ntc-resisto...
    Homemade Circuit Projects
    https://www.homemade-circuits.com › using-ntc-resisto...
    Jan 2, 2024 — In this post I have explained how to use an NTC thermistors in circuits for suppressing surge current during power switch ON.Read more

    How to Use NTC Thermistors for Inrush Current Limiting


    TDK Corporation
    https://product.tdk.com › techlibrary › howto_ntc-limiter
    TDK Corporation
    https://product.tdk.com › techlibrary › howto_ntc-limiter
    NTC thermistors are used as ICLs (inrush current limiters) to protect circuits of electrical and electronic devices against inrush currents easily and ...Read more

    RTI Surge Gard Inrush Current Limiters


    Ametherm
    https://www.ametherm.com › surge-gard
    Ametherm
    https://www.ametherm.com › surge-gard
    RTI Electronic's Surge-Gards are NTC Thermistors for limiting inrush current. Ametherm now owns and manufactures the Surge-Gard product line.

    NTC Inrush current limiter application note


    Eaton
    https://www.eaton.com › resources › technical › e...
    Eaton
    https://www.eaton.com › resources › technical › e...
    PDF
    Power NTC thermistors can offer an elegant solution alternative to fixed resistors in power supplies and converters that experience an initial surge current due ...Read more
    3 pages

    NTC Inrush Current Limiters, High Power ...


    Shiheng Electronics
    https://www.ntcshiheng.com › inrush-current-limiter
    Shiheng Electronics
    https://www.ntcshiheng.com › inrush-current-limiter
    Inrush Current Limiter can suppress surge currents in circuits, and after completing the function of suppressing the surge current.Read more

    Protection Application of Surge Suppression Resistor NTC in ...


    socay.com
    https://www.socay.com › portal › article › index › cid
    socay.com
    https://www.socay.com › portal › article › index › cid
    Aug 29, 2024 — When the circuit is turned on, it can effectively suppress the startup surge current; and after completing the suppression of the surge current, ...Read more

    Negative Power Thermistor (NTC) | Circuit Protections


    Unictron Technologies Corporation
    https://www.unictron.com › protection › ntc-power-ther...
    Unictron Technologies Corporation
    https://www.unictron.com › protection › ntc-power-ther...
    At the moment when the power is turned on, the NTC has a higher resistance, so it will suppress the surge current for about 1 to 2 seconds. During this period ...Read more

    NTC Thermistor Temperature Sensitive Resistor Inrush ...


    eBay
    https://www.ebay.com › ... › Thermistors
    eBay
    https://www.ebay.com › ... › Thermistors
    NTC thermistor for surge suppression is a high-power wafer thermistor commonly used in electronic circuits with capacitors, heaters and motor starters. See full ...Read more
    $4.79 · In stock · $7.95 delivery
    Popular products
    • SG100 Thermistor, Ntc, Surge-Gard.
      SG100 Thermistor, Ntc, Surge-Gard
      $5.29
      eBay
      SG100 Thermistor, Ntc, Surge-Gard
      $5.29
      eBay
    • Inrush Current Limiter NTC Thermistor - Granger Amplification.
      Inrush Current Limiter NTC Thermistor - Granger Amplification
      $5.95
      Granger Amplification
      Inrush Current Limiter NTC Thermistor - Granger Amplification
      $5.95
      Granger Amplification
    • NTC Thermistor for Inrush Current Limiting.
      NTC Thermistor for Inrush Current Limiting
      $0.69
      Jameco.com
      NTC Thermistor for Inrush Current Limiting
      $0.69
      Jameco.com
    • Termistor SG240, Ntc, Surge-Gard.
      Termistor SG240, Ntc, Surge-Gard
      $7.61
      eBay
      Termistor SG240, Ntc, Surge-Gard
      $7.61
      eBay
    • RS Pro Inrush Current Suppressor.
      RS Pro Inrush Current Suppressor
      $1.00
      RS - America
      RS Pro Inrush Current Suppressor
      $1.00
      RS - America
    • 10pc Ntc Thermistor Surge Protection 13sp020 N13sp020 20ω Φ13mm 13mm.
      10pc Ntc Thermistor Surge Protection 13sp020 N13sp020 20ω Φ13mm 13mm
      $3.00
      eBay - wonderco_buy
      10pc Ntc Thermistor Surge Protection 13sp020 N13sp020 20ω Φ13mm 13mm
      $3.00
      eBay - wonderco_buy
    • Vishay NTC Thermistor.
      Vishay NTC Thermistor
      $6.80
      DigiKey       & more
      Vishay NTC Thermistor
      $6.80
      DigiKey       & more
    • NTC Thermistor Resistors Temperature Sensor Negative Temperature Coefficient.
      NTC Thermistor Resistors Temperature Sensor Negative Temperature Coefficient
      $1.43
      eBay
      NTC Thermistor Resistors Temperature Sensor Negative Temperature Coefficient
      $1.43
      eBay

    Thermistors and NTC Thermistors


    Basic Electronics Tutorials
    https://www.electronics-tutorials.ws › thermistors
    Basic Electronics Tutorials
    https://www.electronics-tutorials.ws › thermistors
    Inrush current suppressors and surge limiters are types of series connected thermistor ... The difference being that NTC thermistors reduce their resistance as ...Read more
    People also search for
    How to use ntc thermistor to suppress surge
    NTC inrush current limiter calculator
    How to use NTC thermistors for inrush current limiting
    Inrush current limiter circuit
    Power NTC thermistor
    Inrush current limiter thermistor
    PTC inrush current Limiter
    Ntc inrush current limiter smd

    Page Navigation

    12345678910Next

    Footer Links

    Bull Run, Virginia
     - Based on your past activity
     - 
    Update location
    Can't update your location
    Learn more
    Updating location...
    HelpSend feedbackPrivacyTerms
    Google apps