SRP175SF

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PTC Resettable Fuses are devices which are circuit protectors that use a thermally sensitive, positive temperature coefficient (PTC) resistor for overcurrent protection. Their function is to temporarily deactivate electrical circuits if there is a fault current, and re-enable them once it has been eliminated. The SRP175SF is one particular type of resettable fuse, used for a variety of applications. This article will discuss the application fields and working principle of the SRP175SF.

The SRP175SF is a self-regulating poly fusing device with a voltage rating of 250 volts AC and interrupting rating of 75 amperes. It is well suited for AC line protection, motor control, telecom and data applications, controllable lighting circuits, industrial automation, and surge protection. The device is used in a variety of applications for its ability to protect against DC over-currents, AC short-circuit failures, and high vibration environments.

The working principle of the SRP175SF is relatively simple. In normal operation, the UL 94V-0 rated thermoplastic case encloses a bimetallic element that consists of two different metals, for example copper and an iron sheet. This element is also connected with an end cap and terminals. The end cap ensures that no current flows through the SRP175SF. When the current trips the bimetal element, the end cap becomes heated. This heat is then transferred to the bimetal element, causing it to bend. As it bends, an internal contact is opened and the SRP175SF is deactivated.

The SRP175SF also features a resetting mechanism. When the fault is eliminated, the bimetal element cools and springs back to its original position. This process takes place over the course of several minutes. The resetting process typically begins when the case temperature reaches a certain amount. This is approximately 95°C (203°F).

The SRP175SF features a wide operating temperature range of -40°C to +105°C, making it well suited for use in a variety of environments. This also means the device is good for use in high vibration or shock environments, such as military or medical applications. It is an excellent way to protect against nuisance trips, as well as Thermal Overload Protection (TOP).

The SRP175SF is UL recognized and CSA certified, making it safe to use in any environment. It also has an insulation voltage of 1500Vrms, making it one of the most reliable PTC resettable fuses on the market.

In conclusion, the SRP175SF is a PTC resettable fuse with a voltage rating of 250 volts AC and interrupting rating of 75 amperes. It is suitable for a variety of applications, such as AC line protection, motor control, telecom and data applications, controllable lighting circuits, industrial automation and surge protection. Its working principle is based on a simple bimetallic element enclosed in a UL 94V-0 rated thermoplastic case. When the over-current is detected, the end cap becomes heated and the bimetal element bends and deactivates the SRP175SF. The resetting process then begins once the case temperature cools to the designated temperature. The SRP175SF is UL recognized and CSA certified, making it suitable for use in any environment.

The specific data is subject to PDF, and the above content is for reference