PTR030V0800-TR1

PTC resettable fuses, also known as Polyfuses, are commonly used in applications where a need to protect a circuit from electrical damage resulting from an over-current situation arises, while avoiding the inconvenience of having to replace a “one-time” fuse. In the event of an over-current situation, the fuse provides a short-time overload protection, and then “self-resets” its own protective switch after the situation has been cleared. This combination of features of PTC resettable fuses makes them ideal for a number of applications.

The PTR030V0800-TR1 PTC resettable fuse is a thermally actuated resettable fuse suitable for operating currents up to 3A. This device provides overcurrent protection with a wide range of AC and DC applications. It has a wide resistance range of 0.6 Ohms to 10 Ohms with a working voltage of up to 800 volts AC or DC. It has a very small form factor and can be used on most printed circuit boards. The fuse is designed to protect circuits from over-current and shorts without having to be replaced, allowing for easy use and maintenance.

The working principle of the PTR030V0800-TR1 PTC resettable fuse is relatively simple. It is based on the principle of thermal-resistance temperature sensing. Essentially, the fuse contains two elements, an insulated heater element and a positively temperature-coefficient (PTC) element. When no current is present, the low thermal resistance of the PTC element and the high thermal resistance of the insulated heater element maintain the thermal balance of the fuse. However, when an excess current passes through the device, the heat generated by the current flowing through it causes the PTC element to increase its resistance, resulting in a rapid rise in temperature. This thermal rise causes the heater element to open, creating an interruption of the current flow and protecting the circuit against further damage.

The PTR030V0800-TR1 PTC resettable fuse can be used in a variety of applications. Due to its small form factor and wide operating current ranges, it can be used to protect medium to high power switch-mode power supplies, DC motors, control circuits, and other DC applications. Additionally, due to its high working voltage, it can be used to protect circuits from high voltage transients such as lightning strikes and other high voltage surges. Furthermore, the fuse is designed to meet UL/cUL 94V-0 requirements for flammability and self-extinguishing characteristics, making it an ideal choice for an array of AC and DC applications.

In conclusion, the PTR030V0800-TR1 PTC resettable fuse is an ideal choice for medium to high power switch-mode power supplies, DC motors, control circuits, and other DC applications. It\'s small form factor makes it easy to install in most printed circuit boards. The fuse is designed to protect circuits from over-current and shorts without having to be replaced, allowing for easy use and maintenance. Furthermore, thanks to its high working voltage, the fuse can safeguard circuits from potentially destructive high voltage transients.