0451.125MR

Fuses are an important component of electrical circuits, providing protection against overcurrent and excessive temperatures. The 0451.125MR is a 1-amp, dual element, time-delay, thermal fuse designed for applications that require advanced overcurrent protection. This article discusses the application field and working principle of this fuse.

Application Field

The 0451.125MR fuse is most suitable for use in automotive circuits, telecommunications equipment, consumer electronics, office equipment, industrial controls, and medical devices. This fuse is UL-approved and can be used with all types of electronic components. It provides circuit protection from thermal overload and is designed to protect against short-circuits, overloads, and excess voltage.

The 0451.125MR is designed to withstand a wide range of temperatures. It can operate between -55 °C to 125 °C and has a maximum operating voltage of 32VAC or 125VAC, depending on the model. This fuse is available in two versions – UL1500VPR and UL600VPR. The UL1500VPR is designed for high-voltage applications and can handle up to 1500V, while the UL600VPR version is designed for low-voltage applications and can handle up to 600V.

Working Principle

The 0451.125MR fuse is a dual element, time-delay fuse. It consists of two parts – the element and the connector. The element is made of a conductive material, such as copper or aluminum, which has been hardened to resist temperatures and vibrations. The element provides protection against overcurrent and excessive temperatures. The connector is made of insulation material, and it connects the fuse to the circuit. The element and the connector are connected by a gas-filled chamber, which contains a bimetallic strip. The bimetallic strip acts as a switch which shuts off the power when a predetermined temperature is reached.

The 0451.125MR fuse is designed to allow for a small amount of inrush current before it trips. When the current through the fuse exceeds the preset limit, the bimetallic strip begins to heat up. As it heats up, it expands and activates the switch, which then trips and shuts off the power. The amount of time it takes for the bimetallic strip to heat up and activate the switch is called the time-delay. The time-delay is determined by the size of the bimetallic strip, and it allows the fuse to provide a high level of protection against overcurrent and short circuits without affecting the supply of power to the circuit.

Conclusion

The 0451.125MR is a 1-amp, dual element, time-delay thermal fuse specifically designed for applications that require advanced overcurrent protection. It is suitable for a wide range of applications and is available in two versions – the UL1500VPR and the UL600VPR. The 0451.125MR has a fast time-delay and can provide reliable protection from thermal overload and short-circuits, overloads, and excess voltage.