B72214P2151K101

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Varistors, also known as Voltage Dependent Resistors (VDRs) or Voltage Suppression Devices, are components that limit the amount of voltage applied across them and protect electronic circuits from overvoltage. The B72214P2151K101 is an 18 pin varistor that offers robust protection against transient overvoltage and other extreme conditions, and has become the go-to device for a variety of applications.

The B72214P2151K101 is a non-linear, bi-directional device, meaning it is capable of passing current in both directions, from anode to cathode or vice versa. When placed in parallel with a load, it reduces the voltage across the load. This is accomplished by shunt charging, a process whereby the varistor turns into a low resistance path for the current when voltage reaches a particular threshold. When the voltage exceeds this threshold the varistor acts as a current source, allowing the path of least resistance to be redirected. As voltage increases further, the current staying constant, the varistor continues to redirect it to power dissipative paths and thus reduce the differential voltage across the load.

The B72214P2151K101 is a common choice for a variety of applications, from telecom and energy dissipation to personal entertainment and medical equipment. Traditionally, telecom applications use an 18 pin package to ensure big block capacitors fit in the board properly, while medical equipment needs to minimize the amount of components on board in order to reduce the cost and increase the reliability. The B72214P2151K101 18 pin varistor offers both these features.

In terms of operation, the B72214P2151K101 is basically a diode with voltage dependent current characteristics. It features fast response time, low capacitance, and small size. It also features overvoltage and reverse polarity protection, as well as various other features depending on the respective application. The varistor operates by forming a voltage-dependent conductive connection between the incoming load voltage and the ground. When the protection threshold is exceeded, the varistor allows the current to pass from its cathode to its anode, thus dissipating the high energy at the moment of overvoltage.

In addition to telecom and medical applications, the B72214P2151K101 can also be used to protect other sensitive components such as computers, consumer electronics, and personal devices. The device is designed to limit the maximum amount of recovery voltage protection to a guaranteed value (often less than 10V) regardless of the magnitude of transient. This makes the B72214P2151K101 ideal for applications that require USB medical grade protection, electromechanical isolation, and automotive applications.

The B72214P2151K101 varistor is available in both surface-mount and through-hole package and comes with a variety of ratings, ranging from 2.5 to 450V. It also offers excellent thermal stability and more than 8 years of life expectancy, making it an ideal choice for high-end applications that require long-term high performance. Furthermore, the device is UL listed, RoHS compliant, and compliant with safety standards such as EN60715 and VDE0660.

In conclusion, the B72214P2151K101 offers a reliable and affordable solution for applications that require transient overvoltage and other extreme conditions. The device is UL listed, RoHS compliant, and compliant with international safety standards. Its small size, fast response time, and overvoltage protection make it the ideal choice for telecom, medical, automotive, and other sensitive load applications.

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