1206L100WR

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PTC Resettable Fuses are polymer based circuit safety devices that work by fusing the circuit when the power flow exceeds a certain level. This action then requires manual reset to continue with operation. The 1206L100WR is an example of a PTC Resettable fuse.

These devices are widely used in numerous applications where an excess of current or power flow is possible. Common applications include consumer electronics, power tools, automotive, and industrial controls. An often-cited example is the fuses on microwave ovens that allow the oven to continue working after a power spike or short circuit is detected and dissipated.

The 1206L100WR has a number of specific characteristics that make it especially useful for protecting circuits:

1) It is a surface mount device, allowing it to be integrated into various designs on a PCB with a maximum footprint.

2) The device has an open-circuit voltage of 41V, allowing it to handle a greater range of current and spike voltages.

3) The device has a hold current of 2.5 A-3.0A, making it suitable for use in fairly higher-power circuits.

4) The device has a maximum reset voltage of 25V, minimizing the amount of excess current that is allowed to flow.

5) The device has a maximum Operating Temperature Range of -55°C to +125°C, making it widely applicable in environment that may experience temperature extremes.

The working principle of the PTC Resettable Fuse is based on the concept of overcurrent protection. When the pre-determined maximum current is exceeded, a PTC material heats up, increases in impedance and restricts further current. This process is “self-limiting,” or self-correcting, as once the current is disconnected, the fuse cools and reset itself to start all over again.

The 1206L100WR is rated for maximum current of 3 A, meaning that any current exceeding this limit will immediately trip the fuse or cause the internal impedance to increase and stop the current. In the case of the 1206L100WR, the current-limiting action reduces the fault current significantly, as the device is designed to reset the power very quickly and provide safety and protection until the fault can be isolated and repaired.

The 1206L100WR also has several safety features that make it desirable for certain applications. The device has a thermal trip mechanism, meaning that in normal operation, the fuse will not deactivate until the current is high enough to cause the PTC material to heat up beyond a certain temperature. Furthermore, the device is designed with a “positive temperature coefficient,” meaning that as the temperature rises, the resistance will increase, thus further limiting the current. This helps to ensure that any fault is quickly detected and removed, and that a catastrophic overload does not occur.

The 1206L100WR is an excellent example of a PTC Resettable Fuse that can be used in a variety of applications to provide safety, protection, and reliable operation. Its surface mount design, higher voltage rating, higher hold current, lower reset voltage, and maximum operating temperature range make it a versatile device that can protect numerous circuits. Furthermore, its construction and design make it highly reliable and without any of the dangers associated with other types of circuit protection devices.

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