SMD250F/15-2920-2 Circuit Protection

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PTC resettable fuses are an extremely versatile form of circuit protection. They go beyond the traditional one-time protection afforded by their non-resettable cousins and provide both continuous and resettable protection. As such, PTC resettable fuses are the perfect protection against overcurrent, overtemperature, short circuits, and other dangerous conditions. The SMD250F/15-2920-2 is a perfect example of a PTC resettable fuse and is widely used in control panels, wiring harnesses, computers, modems, and other electrical circuitry.

The SMD250F/15-2920-2 is an ultra-low-profile resettable fuse made with a low-profile surface-mount package. It comes in three models, each with its own characteristics. The first model is rated at 5V, 0.25A, with a tripping time of 250ms. The second model is rated at 15V, 0.15A, with a tripping time of 1530ms. The third model is rated at 25V, 0.2A with a tripping time of 2520ms. All three models feature a defeatable auto restart, low 1/4” profile, and bright red trip indicator.

The SMD250F/15-2920-2 offers a wide range of applications with its versatile features. It is used in a variety of control panels, wiring harnesses, computers, modems, and other electrical circuitry due to its ability to provide both continuous and resettable protection in a low-profile surface-mount package. Due to its low weight and small size, it is often used in applications where space is limited. In addition, the SMD250F/15-2920-2 is also used for low-power motors, controllers, and unloaded voltage spikes in ultra-low-power applications.

The working principle of the SMD250F/15-2920-2 is relatively simple. The device consists of a polymeric PTC element, a circuit board interconnect, a case, and red trip indicator. The polymeric PTC element is the heart of the device and consists of an electrically conductive polymer which heats up when a current is applied to it. At a predetermined current, the PTC element reaches a “tripping” temperature where it expands, cutting off the flow of current and tripping the fuse. This ensures continuous protection by interrupting the current when the current exceeds the rated current. The red trip indicator clearly shows when the fuse has tripped.

In addition to overcurrent and overtemperature protection, the SMD250F/15-2920-2 also features a defeatable auto restart feature. This ensures that the device will automatically reset itself and begin operation again when the current drops below the rated current. This ensures continuous protection for the device and reduces the time required for manual resetting.

The SMD250F/15-2920-2 is an extremely versatile PTC resettable fuse due to its ultra-low-profile surface-mount package and wide range of applications. Its ability to provide both continuous and resettable protection, combined with its defeatable auto restart feature, makes it an invaluable tool in the world of circuit protection.

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