250R145ZR Circuit Protection

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Introduction

PTC resettable fuses are used in various electronic appliances and circuit protection applications to provide fast and effective over-current protection. They are widely employed in the protection of power supplies, industrial systems, medical equipment, automotive industry, and consumer electronic circuits. PTC resettable fuses include 250R145ZR, which is a high performance radial-leaded, polymeric, and encased low-voltage fuse.

250R145ZR application field and working principle

The 250R145ZR PTC resettable fuse is designed for use in circuits where reliable and fast protection against short-circuiting is essential. The fuse is completely self-resettable and offers very reliable protection even after many over-current events. The fuse features low temperature coefficients, low voltage drop, and high over-current protection from 135mA to 22A. The 250R145ZR features a radial lead construction that provides ideal mechanical and electrical characteristics for surface mount applications. When an over-current condition occurs, the resistance of the fuse increases abruptly, thus providing a high level of protection. The internal construction of the fuse enables it to safely dissipate energy and protect the electronic components from damage.

The 250R145ZR PTC resettable fuse functions as a box of electrical resistance, which increases or decreases its resistance according to the current flow through it. When the current increases, the resistance of the PTC increases significantly to protect the circuit from damage. When the over-current condition is removed, the resistance of the PTC gradually decreases, allowing normal operation to resume. This feature makes it ideal for use in applications where frequent but momentary over-currents, such as spikes, are present.

Benefits

The use of the 250R145ZR PTC resettable fuse offers several benefits. One of the biggest advantages is that it eliminates the need for manual resetting. This saves time and labor costs as the fuse is self-resetting when the over-current is removed. The 250R145ZR also offers high thermal performance, low voltage drop, and fast-acting fuse action, which can protect sensitive equipment and circuitry from potential damage.

The 250R145ZR is a reliable and effective solution for over-current protection. It is safe, fast-acting, and self-resetting, making it an ideal choice for a wide range of applications. It is available in a variety of packages for surface mount applications and is extremely reliable for circuit protection.

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