B57235S0509M051

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
R @ 25°C:	5 Ohms
Tolerance:	±20%
Current - Steady State Max:	4.2A
Diameter:	0.374" (9.50mm)
Lead Spacing:	0.197" (5.00mm)
Approvals:	CQC, UL, VDE

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Inrush Current Limiters (ICL) have become increasingly important components in power electronics and motor control applications. The importance of these components has been further driven by the development of digital control in motor applications and the increased reliance on microprocessor-based power equipment and electronic components. The B57235S0509M051 ICL is designed to provide reliable and stable control of inrush currents into power supply circuits.The B57235S0509M051 ICL is a self-recovering Surface Mount Device (SMD) featuring an integrated control chip and a red LED. The control chip of the ICL is an active device that features a sequence of internal switching steps. Inrush currents are produced when a capacitor is charged up to its final value. The control chip within the ICL provides the main charge control functionality, reducing the initial inrush current and then limiting its peak value.The main advantages of the B57235S0509M051 ICL are its small size, low cost, and high efficiency. The device is also highly resistant to vibration and shock, making it suitable for use in harsh environments. Its operation is also relatively easy to set up, as the LED indicator will indicate whether the device has started to limit the inrush current or not.The application field of the B57235S0509M051 ICL mainly includes protection of power components from high inrush currents, like power supplies, frequency converters, switches, electric motor drives, etc. It is also used for protection of lighting circuits. The ICL is used to limit the surge current associated with the high startup inrush current of these devices. In addition, the ICL is also used in power line communication applications to protect waveform distortion due to high load inrush current.The working principle of the B57235S0509M051 digital inrush current limiter is based on a sequence of internal switching steps. As mentioned earlier, inrush currents are produced when a capacitor is charged up to its final value. The control chip of the ICL operates according to a programmed sequence, gradually increasing the impedance while throttling the inrush current to a desired level. After the inrush current has been limited, the ICL then resumes normal operation.The step-by-step operation of the B57235S0509M051 digital ICL can be described as follows: Initially, the control chip of the ICL applies a high impedance to the input signal which effectively reduces the input current. The impedance is then gradually decreased as the inrush current begins to rise. The control chip then adjusts the rate of current rise such that its peak value is limited to the preset value. Once the peak current has been reached, the ICL then reverts back to the initial high impedance state in order to ensure that the inrush current is kept to a desired level.The B57235S0509M051 digital ICL has been designed to improve the reliability and efficiency of motor and power electronics equipment. With its programmable control chip and red LED indicator, the ICL is able to easily adjust its operation in order to limit the inrush current. Its small size and low cost also make it a suitable solution for a variety of applications. By providing reliable and efficient inrush current protection, the B57235S0509M051 ICL can ensure increased efficiency and reliability of motor and power electronics equipment.

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