SG220

Series:	SURGE-GARD™
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
R @ 25°C:	10 Ohms
Tolerance:	±15%
Current - Steady State Max:	3A
R @ Current:	200 mOhms
Diameter:	0.45" (11.4mm)
Lead Spacing:	0.310" (7.87mm)
Approvals:	CSA, UR

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Inrush Current Limiters (ICL): SG220 Application field and Working PrincipleCurrent inrush represents a sudden high surge of current that can cause severe damage to loads upon start-up. To avoid this expensive equipment damage, engineers use inrush current limiters (ICL) such as the SG220 series. These devices are designed to quickly and accurately limit the amount of current that is drawn by a load during start-up.The SG220 series of inrush current limiters are designed with integrated suppression circuitry featuring a unique negative thermal coefficient (NTC) thermistor and a metal oxide varistor (MOV). The base of the NTC thermistor is cut from a special formulation of cadmium-free material, which allows for the thermistor material to chemically react with the air to reduce temperature immediately after installation. This provides superior protection against high-energy inrush current.These inrush current limiters are ideal for controlling large industrial equipment, such as heating and air conditioning systems, pumps, and motors, to protect them from severe damage and costly repairs. The SG220 series is also used to protect microprocessor-based equipment from incorrect voltage levels during inrush current conditions.The SG220 inrush current limiters work by providing an adjustable current limit set point. When a load is powered up, the current surges to a much higher level than normal. The SG220 senses this inrush current, and its integrated circuitry limits the current to the set point by introducing a load resistance. This reduces the magnitude of the inrush current, protecting the load from damage.The SG220 series are small, lightweight, and compact units capable of controlling inrush currents of up to 20 amperes RMS. This makes them ideal for many types of equipment, including computers, networking systems, telecom equipment, and even consumer electronics.The SG220 series have built-in thermal protection which ensures that the thermistor will trip if the temperature increases too high. This ensures that the device will provide a safe level of inrush current protection, even under extreme conditions.The SG220 series inrush current limiters are designed to save time and energy. By providing a controlled current limit, these devices reduce the amount of power wasted during inrush current occurring during start-up. The SG220 series has many advantages over other solutions, including reducing energy consumption, improving efficiency, and increasing safety.The SG220 series also provides a balanced low-impedance element that ensures repeatable performance even with different environmental conditions. It is suitable for indoor and outdoor use, and is UL-, CE-, RoHS-, and TUV-certified. The device also has a built-in fuse that will automatically open if the current rating is exceeded.In conclusion, the SG220 series of inrush current limiters are a cost-effective and reliable solution for many applications. The device is highly reliable, has a long life span, and provides superior protection from inrush current damages. With a wide operating temperature range, adjustable current limit set point, and a UL-, CE-, RoHS-, and TUV-certification, the SG220 series of inrush current limiters are the perfect solution for guarding your industrial and consumer electronics against dangerous inrush current conditions.

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