MF72-007D13

Series:	MF72
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
R @ 25°C:	7 Ohms
Tolerance:	±20%
Current - Steady State Max:	4A
R @ Current:	188 mOhms
Diameter:	0.610" (15.50mm)
Lead Spacing:	0.295" (7.50mm)
Approvals:	--

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Inrush Current Limiters (ICL)

Inrush current limiters, or ICL, are electronic components used to protect applications from sudden and hazardous spikes of current. These components are commonly found in applications that require constant-current operation, such as AC/DC power supplies, battery chargers, and motor control systems. The MF72-007D13 is an example of an ICL, and its application fields and working principle can be explored in detail below.

Application Field

The MF72-007D13 is a quick-response, self-recovery inrush current limiter suitable for 110-250 VAC single-phase input applications. It is designed for use in applications where inrush current limitation is critical, such as high-density power supplies, motors, and some types of industrial equipment. As this limiter is very small, it can be used in tight spaces, such as medical equipment.

Working Principle

In general, ICLs function by limiting the current that flows into the system during the inrush phase of AC power-up. This prevents short-circuit or overload damage to the application, as it limits the peak currents to a pre-set safe level.The MF72-007D13 works to achieve this by utilizing a filament wound around a magnetic core. The core is energized with the incoming AC power, causing it to become magnetized and thus creating a voltage drop across the filament. This voltage drop limits the current that flows into the system.Once the AC power signal reaches its peak and begins to drop, the voltage drop across the filament decreases. This allows more current to flow into the system until it reaches a pre-set level again, at which point the energy is cut off. The cycle then repeats itself each time the power cycle is triggered.

Advantages

With the use of an ICL, the risk of inrush current damage to the application is minimized. It not only helps protect the application from overloads, but also helps improve efficiency by preventing large currents from being drawn unnecessarily. Additionally, as the MF72-007D13 is a very small device, it can be used in very compact applications.

Conclusion

The MF72-007D13 is an example of an inrush current limiter suitable for AC/DC power supplies, battery chargers, and motor control systems. Its construction allows it to limit the current that flows into the system during the inrush phase of AC power-up, which helps protect the application from sudden and hazardous spikes of current. It is suitable for use in tight spaces and can help improve the efficiency of applications.

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