SL22 0R712-B

Series:	SL22
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
R @ 25°C:	700 mOhms
Tolerance:	±25%
Current - Steady State Max:	12A
R @ Current:	30 mOhms
Diameter:	0.866" (22mm)
Lead Spacing:	0.307" (7.80mm)
Approvals:	CSA, UR

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Inrush Current Limiters (ICL)

Inrush current limiters (ICLs) are electrical devices used to protect against sudden and damaging levels of inrush current, often associated with electrical panels that are turned on. When a power source is connected, the ICL prevents the current from surging and swelling to an unsafe level. The SL22 0R712-B series ICL is a specific version, made by Temp-Flex, of inrush current limiters that have a variety of applications in different industries.

Purpose and Function

In terms of electrical system protection, the primary purpose of the SL22 0R712-B ICL is to protect equipment from being damaged by an inrush current. Such current can occur when a system is powered up or when high-induction loads are turned on. An inductive load, such as a transformer or motor, stores a certain amount of energy when it loses power. When the power is reapplied, this stored energy will discharge as a sudden and unexpected surge, which if not stabilized, will damage equipment. The ICL limits this surge by limiting or delaying any inrush current from entering the system, thus protecting it from harm.

SL22 0R712-B Application Fields

The SL22 0R712-B line of ICLs is designed for a variety of industrial applications. It is often used in process control systems, lighting systems, automation systems, and machinery control and power electronic circuits. It is used to protect components that are connected to any input voltage in the range of 120-480VAC and up to 600A peak, including inrush levels of up to 10,000A.In process and environmental control systems, the ICL is used to protect power supplies, variable speed motors, hydraulic systems, pumps and cooling systems, automation systems, PLCs, and a variety of AC circuit protection systems. In lighting systems, it is commonly used to prevent surges in LED lighting, emergency lighting, dimmers, ballasts, and strip lighting circuits. In machinery control and power electronic circuits, the ICL can offer protection against surges due to sudden changes in load, as well as providing protection in rectifier and radiator systems.

Working Principle

The SL22 0R712-B ICL comprises of two main components: a thermal switch and a current switch. The ICL starts to operate with a rapidly decaying inrush current, due to the thermal switch. The current switch then takes over, and the peak current of the inrush is limited to a predetermined level.The thermal switch works by gradually closing after a specified time, allowing more current to pass through the ICL over time. By controlling the rate of current flow, it helps protect the ICL from overcurrent damage. The current switch then takes over as soon as the current exceeds a certain amount, limiting the peak current to a predetermined level.

Conclusion

In summary, the SL22 0R712-B inrush current limiter is a valuable device for protecting electrical systems from damage due to inrush current. It can be used in a wide range of industries, including process control systems, lighting systems, automation systems, and machinery control and power electronic circuits. It works by allowing a slow, controlled current to pass through the system, thus preventing the peak current from reaching an unsafe level. With its robust design and wide range of applications, the SL22 0R712-B is a reliable and effective way to protect sensitive components from the risk of inrush damage.

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