The MS22 75004 inrush current limiting thermistor from Ametherm offers a maximum steady state current of 4A (up to +25ยฐC), resistance of 75ฮฉ ยฑ25% (at 25ยฐC) and a maximum recommended energy rating of 240J. Amethermโs MegaSurgeโข series of inrush current limiting NTC thermistors reduce costs and greatly simplify designs. In addition, they increase safety by eliminating the fire hazard associated with failed relays. While traditional thermistors are only certified for input voltages from 85 VAC to 265 VAC, UL recognised MegaSurgeโข devices are certified for single and three phase input voltages up to 480 VAC. These specifications are the highest of any single-solution inrush current limiting device on the market.
Typical applications for the MS22 series include:
The below table gives the full specifications of the Ametherm MS22 75004 series:
| Weight | 0.00000 kg |
|---|---|
| Dimensions | 32.20 x 9.00 x 23.00mm |
| Actual Energy Failure | 430J |
| Dissipation Constant | 51.8mW/ยฐC |
| Maximum Recommended Energy | 240J |
| Maximum Steady State Current | 4A |
| Package / Size | |
| Resistance at +25ยฐC | 75ฮฉ |
| Series / Model | |
| Thermal Time Constant | 122mW/s |
| Tolerance | |
| Voltage Rating |
This product meets the requirements in compliance with RoHS Directive 2011/65/EU including Directive (EU) 2015/863 amending Annex II, on the restriction of the use of Certain Hazardous Substances in Electrical and Electronic Equipment.
The above product is, however, is not Pb free, using exemption 7(a) โLead in high melting temperature type solders (i.e. lead-based alloys containing 85% by weight or more lead)โ
We are pleased to provide you with a range of additional content including videos, product datasheets, case studies, white papers and application notes for your reference. Please see below for the latest content available:
| DOCUMENTATION | |
|---|---|
| Ametherm MS22 75004 MegaSurgeโข inrush current limiting thermistor datasheet | |
We are pleased to provide you with a range of videos, please see below for the latest content available:
| VIDEOS | |
|---|---|
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Limiting Inrush Current with NTC and PTC Themistors video
Learn how to limit inrush current using NTC and PTC thermistors in this presentation by Ametherm. Many applications today, including industrial machinery, power tools and other high current equipment, use limiting inrush current as a major design consideration to combat the problematic effects of inrush current. Inrush current occurs when a system powers on and experiences a spike in current. This current can be substantially higher than standard operating current. If not properly managed, it can reduce the effective operating life and impose damage to equipment. For example, inrush current could disable a cooling fan, eventually leading to total system failure. Applications that are switched on and off quickly, such as welding equipment, present a particular concern for limiting inrush current. The limiting inrush current circuit must reset instantaneously during each power on to protect the system. This further complicates the management of inrush current. |
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Limiting Inrush Current for a 40VA Transformer
Inrush current often causes problems for transformers. This video will show you how to calculate the right inrush current limiter for your transformer in 7 simple steps. |
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DC Motor Inrush Current and What You Need to Know
What does inrush current have to do with DC motors? This video answers that question by discussing the cause of DC motor inrush current and how to prevent the inrush of current at startup from possibly damaging the DC motor with the use of Ametherm's Inrush Current Limiters. They start by explaining how a DC motor functions, its applications and key components, how inrush current factors in, how to solve the problem of inrush current, and how to select the right inrush current limiter for your application with three easy steps. |
| VIDEOS | |
|---|---|
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| Limiting Inrush Current with NTC and PTC Themistors video
Learn how to limit inrush current using NTC and PTC thermistors in this presentation by Ametherm. Many applications today, including industrial machinery, power tools and other high current equipment, use limiting inrush current as a major design consideration to combat the problematic effects of inrush current. Inrush current occurs when a system powers on and experiences a spike in current. This current can be substantially higher than standard operating current. If not properly managed, it can reduce the effective operating life and impose damage to equipment. For example, inrush current could disable a cooling fan, eventually leading to total system failure. Applications that are switched on and off quickly, such as welding equipment, present a particular concern for limiting inrush current. The limiting inrush current circuit must reset instantaneously during each power on to protect the system. This further complicates the management of inrush current. |
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| Limiting Inrush Current for a 40VA Transformer
Inrush current often causes problems for transformers. This video will show you how to calculate the right inrush current limiter for your transformer in 7 simple steps. |
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|
| DC Motor Inrush Current and What You Need to Know
What does inrush current have to do with DC motors? This video answers that question by discussing the cause of DC motor inrush current and how to prevent the inrush of current at startup from possibly damaging the DC motor with the use of Ametherm's Inrush Current Limiters. They start by explaining how a DC motor functions, its applications and key components, how inrush current factors in, how to solve the problem of inrush current, and how to select the right inrush current limiter for your application with three easy steps. |
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