PFST.200

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As a type of overcurrent protective device, PTC Resettable Fuses have considerable application in many power electronic products, especially those that require high current ratings, small size and minimum power losses. The PFST.200 series is a type of PTC Resettable Fuses available in both standard and advanced versions. The key characteristics of the product include an 800A continuous current rating, a maximum voltage of 1000V withstanding up to some transient over-voltages up to 1500V, an operating ambient temperature of -40°C to +105°C, and a full range of mounting options. Furthermore, these fuses have an emergency recovery mode enabling them to automatically reset and continue normal operation after a short-term overcurrent.

The underlying technology of PTC resettable fuses lies in the positive temperature coefficient characteristics. This involves materials such as polymeric carbon black, polyvinyl chloride, etc. that expand when exposed to a sudden increase in temperature. This expansion which causes the fuse to break the circuit, thereby limiting the overcurrent and thus preventing any further damage to the electronic components or circuits. However, when the temperature returns to normal, the material contracts, allowing the contacts to return to their original position and allowing normal operation to resume.

The PFST.200 series has a number of features that make it suitable for use in various applications. The low resistance of the fuse, for instance, ensures minimum power losses and the short response time of the fuse when activated enables it to operate reliably even in high-speed switching applications. Furthermore, it possesses good surge protection capabilities for higher withstand voltage and a wide temperature range for reliable performance in a variety of environmental conditions. Additionally, its unique structure eliminates the risk of accidental short-circuiting.

Due to its unique features, the PFST.200 series is suitable for a variety of applications, such as switch mode power supplies, TV and computer power supplies, communications equipment, industrial equipment, UPS systems, and other related high-current applications. Furthermore, it is compatible with existing commercial standards, such as IEC 60950-1, UL 60950-1, IEC 60335-1, and UL 98. This makes it a suitable option for those looking to upgrade their safety and protection measures.

In conclusion, the PFST.200 series of PTC Resettable Fuses is an effective way of protecting electronic circuits from damage due to overcurrents. Its low resistance and fast response make it suitable for use in high-speed switching applications, while its surge protection capability and wide temperature range make it reliable for use in various environmental conditions. Additionally, it is compliant with various commercial standards, allowing for easy integration with existing systems.

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