HJ2-L-AC120V-R

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Power Relays, Over 2 Amps

The HJ2-L-AC120V-R belongs to the category of power relays for the subset that supports a current rating of over 2 Amps. This relay can be used for a variety of applications such as motor control and over-current protection.

Application Field

HJ2-L-AC120V-R power relays are commonly used for motor control or current protection applications. Being rated for more than 2 Amps of output current allows them to be utilised in various industrial applications, such as motor switching, AC-DC power supplies, switching circuits, and HVAC systems.

In motor control applications, the relay can be used to control the start and stop of motors, as well as regulate their current draw. It can also be used in more complex motor controllers, such as ones with multiple operating modes. In AC-DC power supplies, HJ2-L-AC120V-R relays can be used to switch between different voltage levels, as well as to provide protection against short circuits and system overloads.

Finally, in HVAC systems, the relay can be used to switch between heating or cooling modes, as well as regulate the system’s current draw. This makes it an ideal choice for HVAC systems requiring reliable current regulation.

Working Principle

The working principle of HJ2-L-AC120V-R power relays is based on the control of inner magnetization. When a current is applied to the relay’s coil, a magnetic field is generated, pushing the inner plunger outward to close the contacts within the relay. When the current to the coil is cut off, the plunger springs back due to the magnetic field being cancelled.

The magnetic field is also utilized as an over current protection feature. When current passing through the coil exceeds the allowed current rating, the plunger is attracted inward by the magnetic field, engaging the inner contacts and preventing overload.

HJ2-L-AC120V-R relays are typically designed for a rated voltage of 120V, and have a rated current rating of 2 Amps or higher. They have a coil resistance of between 30 – 55 Ohms, and a minimum switching voltage of 3V. The contact resistance is between 70 – 150 mOhms, and the switching capability is 1A or less.

Conclusion

HJ2-L-AC120V-R power relays are an excellent choice for a variety of applications, such as motor control and overload protection. The inner magnetization control feature makes them reliable, and the high current rating makes them suitable for a variety of industrial applications.

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