PTGL05AS270K6B51B0

PTC Resettable Fuses

PTC Resettable Fuses, PTCR for short, also known as polymeric positive temperature coefficient devices, are a type of non-linear passive device used to protect circuits from overcurrent conditions. The most common type is a thermally protected current limiter, known as a PTCRfuse. It has a windowed body which is encased in a plastic housing. Inside the housing is a bi-metallic strip, which is heated when a current above a preset level flows through the fuse.

The PTGL05AS270K6B51B0 is a resettable fuse in the PTCR family. It is a low resistance single-layer type, good for protecting circuit boards from both overvoltage and overcurrent. It can handle a peak current of up to 6.5A and operates in a temperature range of -25°C to 85°C. This specific type is widely used in automotive, industrial, and communications applications, where its compact size and low power consumption make it an ideal selection.

Application Fields

The PTGL05AS270K6B51B0 covers a wide range of usage scenarios, including applications in automobiles, white goods, home appliances, industrial systems, electric motors, and outdoor electronic devices. Automotive applications include temperature management for printed circuit boards in engine compartments, thermal management for interior lighting systems, and thermal management for sensors. In the white goods and home appliance market, the PTGL can be used for protecting safety-critical aspects of a range of products, from refrigerators to washing machines. Industrial systems can also benefit from the protection of the PTCRfuse, as it can perform as an overvoltage or current limiter to ensure the safety of machines and personnel. In outdoor electronic devices, it is often used as a surge protection element, offering excellent insulating function in hazardous conditions.

Working Principle

The PTGL05AS270K6B51B0 is a thermally protected current limiter. It operates on the principle of a bi-metallic element being heated whenever the current flowing through the device surpasses a certain threshold. This heats up the bi-metallic element, which then physically moves to break the thermal path. The sudden break in the thermal path results in a significant reduction of temperature, which causes the element to return to its original shape after the overcurrent has ceased. In this way, the circuit is protected from further damage due to excessive current, and the PTCR can be safely reset for future corrective action.

Overall, the PTGL05AS270K6B51B0 is an efficient resettable fuse for protecting automotive, industrial, and communication circuits from overvoltage and overcurrent. Carrying a peak current of up to 6.5A, and able to operate in temperatures from -25°C to 85°C, this PTCR is an ideal choice for industrial or outdoor applications where fast and reliable protection is needed.