PTCCL05H390HBE

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PTC (Positive Temperature Coefficient) Resettable Fuses, or PolySwitch as they are more commonly known, were invented by Raychem Corporation in the early 1990s. As the name suggests, these are fuses that will automatically open at a predetermined temperature and can be easily reset to their original closed state once the temperature decreases. This makes them ideal for applications where on-off control or resetting of a circuit or device is required. One such device is the PTCCL05H390HBE and this article will discuss the working principle and application fields of such a device.

The PTCCL05H390HBE is a resettable fuse whose main purpose is to protect against current overloads. As with all PTC resettable fuses, it contains a special polymer that will expand in the presence of an over current condition. This expansion results in an increased internal resistance, which subsequently increases the temperature of the device. When the temperature reaches a predetermined level, the internal resistance increases further until the flow of current is completely blocked. This provides a safe way of protecting the device or circuit from the damage that the over current could cause.

Once the over current condition has been corrected, the temperature of the PTC will start to decrease and so will the internal resistance. When the temperature and resistance have reached a predetermined level, the device will reset itself and normal current flow will resume. This allows the device or circuit that was being protected to not be permanently affected by the over current.

The PTCCL05H390HBE is generally used in applications where over current protection is needed and regular resetting of the device is required. These include automotive, consumer, and medical devices that might need to be switched on and off quickly, or to be reset once any over current has been corrected. The device can be used in both AC and DC circuits as it has a wide operating temperature range of -40°C to +125°C (-40°F to +257°F) and a voltage rating of up to 48V DC.

In conclusion, the PTCCL05H390HBE is a PTC resettable fuse that can provide over current protection and resetting of a device or circuit. It is ideal for applications where regular on-off control or resetting is required and can be used in both AC and DC circuits with a voltage rating of up to 48V DC and a wide operating temperature range of -40°C to +125°C (-40°F to +257°F).

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