# Inrush Current Limiters (ICL) **URL:** \ **Category:** Product Selection Guide\ **Tags:** inrush-current-limiters-icl, circuit-protection, power\ **Created:** [June 23, 2023, 9:01pm UTC](https://forum.digikey.com/t/inrush-current-limiters-icl/32321 "2023-06-23T21:01:26Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![raelynn.roen](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/raelynn.roen/32/46693_2.png) [@raelynn.roen](https://forum.digikey.com/u/raelynn.roen)\ **Post date:** [June 23, 2023, 9:01pm UTC](https://forum.digikey.com/t/inrush-current-limiters-icl/32321/1 "2023-06-23T21:01:26Z")
This Product Selection Guide contains information to help select products in the [Inrush Current Limiters](https://www.digikey.com/en/products/filter/inrush-current-limiters-icl/151) category on [DigiKey.com](http://DigiKey.com) > Inrush Current Limiters (ICL) are designed to limit an initial large flow of electric charge that occurs when a device is first turned on. The Current steady state max range is from 100 mA to 80 A with the Resistance at Current ranging from 1 mOhms to 30.3 Ohms and a lead spacing range of 0.098” to 1.378”. **Selection**** Characteristics** > **R @ 25°C:** Typical device resistance at a device temperature of 25°C. > **Tolerance:** The percentage by which the part’s resistance is allowed to shift from its stated value and still be considered within specification. > **Current - Steady State Max:** The maximum continuous current that should be allowed to pass through the device. May require de-rating based on ambient temperature. > **R @ Current:** Approximate device resistance at the listed maximum steady state current. > **Diameter:** Indicates the overall diameter of the body of the device. > **Lead Spacing:** The distance between the device’s leads, given in Inches (Millimeters) > **Approval Agency:** An indication that the product meets the minimum safety standards of an approving agency. These agencies are either government entities or private third-party labs that protect consumer safety. **Product**** Examples** [![Image](https://global.discourse-cdn.com/digikey/original/3X/0/1/014cc9bc1fa49927a8a79e566b902dec5b3f8c0d.jpeg)](https://www.digikey.com/en/products/detail/ametherm/SL32%202R025/570-1062-ND/363379?) | MFR PART # | SL32 2R025 | | --- | --- | | DIGIKEY PART # | [570-1062-ND](https://www.digikey.com/en/products/detail/ametherm/SL32%202R025/570-1062-ND/363379?) | | MANUFACTURER | Ametherm | | DESCRIPTION | Inrush Current Limiter 2 Ohms ±20% 25 A 1.220" (31.00mm) | | DATASHEET | [Click Here](https://www.ametherm.com/datasheetspdf/SL322R025.pdf) | [![Image](https://global.discourse-cdn.com/digikey/original/3X/c/a/ca55eb14474dbd555576ad27b0b95d3003a4a95b.jpeg)](https://www.digikey.com/en/products/detail/cantherm/MF72-010D9/1190936) | MFR PART # | MF72-010D9 | | --- | --- | | DIGIKEY PART # | [317-1161-ND](https://www.digikey.com/en/products/detail/cantherm/MF72-010D9/1190936) | | MANUFACTURER | Cantherm | | DESCRIPTION | Inrush Current Limiter 10 Ohms ±20% 2 A 0.433" (11.00mm) | | DATASHEET | [Click Here](https://www.cantherm.com/wp-content/uploads/2018/08/MF72_AUG_2018.pdf) | [![Image](https://global.discourse-cdn.com/digikey/original/3X/e/d/ed6d3b95fb2767cf69a46c60563821fae6c670b0.png)](https://www.digikey.com/en/products/detail/epcos-tdk-electronics/B59412C1130B070/5033988) | MFR PART # | B59412C1130B070 | | --- | --- | | DIGIKEY PART # | [495-6658-ND](https://www.digikey.com/en/products/detail/epcos-tdk-electronics/B59412C1130B070/5033988) | | MANUFACTURER | EPCOS - TDK Electronics | | DESCRIPTION | Inrush Current Limiter 120 Ohms ±25% 0.591" (15.00mm) | | DATASHEET | [Click Here](https://www.tdk-electronics.tdk.com/inf/55/db/PTC/PTC_ICL_OC_Leaded_260V_1000V.pdf) | [![Image](https://global.discourse-cdn.com/digikey/original/3X/d/f/dff8918b7684db8f9d190f456a66db092c42b9bd.png)](https://www.digikey.com/en/products/detail/vishay-beyschlag-draloric-bc-components/PTCEL13R121MBE/6569313) | MFR PART # | PTCEL13R121MBE | | --- | --- | | DIGIKEY PART # | [BC3318-ND](https://www.digikey.com/en/products/detail/vishay-beyschlag-draloric-bc-components/PTCEL13R121MBE/6569313) | | MANUFACTURER | Vishay Beyschlag/Draloric/BC Components | | DESCRIPTION | Inrush Current Limiter 120 Ohms ±30% 0.531" (13.50mm) | | DATASHEET | [Click Here](https://www.vishay.com/docs/29165/ptcel.pdf) | **Schematic**** Symbol** ![image](https://global.discourse-cdn.com/digikey/original/3X/2/4/2445f9f4d97d37a4637453f58d237ac2a2df5a0c.png) ###### Schematic symbol courtesy of [Scheme-it](https://www.digikey.com/en/schemeit/). Please see their website for more information and symbols. **Media**** Links** Videos [How to Use Ametherm’s Inrush Current Calculators](https://www.digikey.com/en/videos/a/ametherm/how-to-use-ametherms-inrush-current-calculators) [AMETHERM - SL32 2R025 NTC THERMISTOR](https://www.digikey.com/en/videos/a/ametherm/ametherm---sl32-2r025-ntc-thermistor) Product Training Modules [Inrush Current Limiters - EPCOS](https://www.digikey.com/en/ptm/e/epcos-inc/inrush-current-limiters) [Inrush Current Limiters - Ametherm](https://www.digikey.com/en/ptm/a/ametherm/inrush-current-limiters-overview) [CL Series Inrush Current Limiters - Amphenol](https://www.digikey.com/en/ptm/a/amphenol-advanced-sensors/cl-series-inrush-current-limiters) Blogs [Basics of NTC and PTC Thermistors](https://www.digikey.com/en/blog/basics-of-ntc-and-ptc-thermistors) TechForum [Simple Inrush Current Limiting in Power Applications](https://forum.digikey.com/t/simple-inrush-current-limiting-in-power-applications/4248) [Fixing a pool chlorine salt generator](https://forum.digikey.com/t/fixing-a-pool-chlorine-salt-generator/871) ### If you have any general questions on the specifications for selecting [Inrush Current Limiters](https://www.digikey.com/en/products/filter/inrush-current-limiters-icl/151), please reply using the button below. If you have questions on specific Inrush Current Limiters please post those questions in the [Circuit Protection](https://forum.digikey.com/c/power/circuit-protection/111) category.