RHEF1500 Circuit Protection

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PTC Resettable Fuses, or polyfuses, are used in applications such as power supplies, consumer electronics and embedded systems to protect against short circuit and overcurrent conditions. The RHEF1500 is a self-regulating PTC fuse, designed for use in 12 VDC or 24 VDC applications, with a maximum rated voltage of 30 VDC and a rated current of 15A. The device is UL Recognized and CSA Certified. The RHEF1500 is designed to open the circuit when the current reaches a predetermined level. Once the fault condition has been resolved, the device will reset itself, allowing the circuit to resume normal operation.

The RHEF1500 is a low-profile, surface-mountable, radial-leaded device specifically designed for surface-mount application. It can be installed directly onto a PCB and takes up very little room, so it is suitable for use in space-sensitive designs. It also features a wide operating temperature range of -65°C to 125°C.

The RHEF1500 works on the principle of “thermal runaway.” As the current going through the device increases, it causes an increase in temperature in the device’s internal thermistor. This causes a corresponding increase in resistance which, in turn, increases the temperature further. As the temperature continues to increase, the ceiling temperature of the device is reached and the fuse “trips” and opens the circuit. This prevents further damage and allows the device to reset itself.

The RHEF1500 has a number of useful features. It features a wide operating temperature range, from -65°C to 125°C, and it is designed to re-close within 10 seconds after the fault condition has been removed. This ensures that the current limiter will reset and the system will resume safe operation quickly. It also has a very low on-state resistance which makes it ideal in applications which require a low-loss power path.

The RHEF1500 has a number of advantages over traditional thermal-type fuses. It can be used in high current applications up to 15A, and is designed to reset after the fault condition has been cleared. This allows the system to resume normal operation quickly after a fault occurs, reducing the risk of further damage to the circuitry. It is also far easier to mount than traditional thermal-type fuses, making it suitable for surface-mount applications on densely populated PCBs.

The RHEF1500 is an extremely useful and versatile component, capable of protecting against short circuits and overcurrent conditions in a range of applications. Its low-profile, surface-mountable design makes it ideal for use in space-sensitive devices, and its ability to reset itself after a fault leaves the system to resume normal operation quickly. This makes it suitable for use in 12 VDC and 24 VDC applications, allowing manufacturers to protect their systems with a reliable and durable PTC resettable fuse.

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