Ningbo Zettler Electronics Co., Ltd.
Ningbo Zettler Electronics Co., Ltd.
Power Relay
Power Relay

A power relay typically consists of an electromagnet, a set of contacts, and a spring. When the electromagnet is energized, it pulls the contacts together, allowing current to flow through the load. When the electromagnet is de-energized, the spring returns the contacts to their original position, interrupting the current flow.


Power Relay Types

Subminiature High Power Relay
Subminiature High Power Relay
They are designed to handle high-power loads, typically ranging from several amps to tens of amps. These relays are commonly used in applications such as industrial automation, power distribution, and control systems where high power switching is required. They are able to handle high voltage levels and have a higher contact pressure than subminiature intermediate power relays.
Subminiature Intermediate Power Relay
Subminiature Intermediate Power Relay
They are designed to handle lower power loads, typically ranging from several milliamps to several amps. These relays are commonly used in applications such as telecommunication, measurement, and control circuits where low power switching is required. They have a lower contact pressure than subminiature high power relays, and are not designed to handle as high voltage levels.
Miniature High Power Relay
Miniature High Power Relay
They are characterized by their small size and low power consumption. They are typically designed to handle power loads ranging from a few amps to tens of amps. These relays are commonly used in applications such as home appliances, automotive systems, and other small-scale devices that require high power switching capabilities in a compact size.
High Power Relay
High Power Relay
They are designed to handle high power loads ranging from tens of amps to hundreds of amps. They typically have higher contact pressure than miniature high power relays and are built to withstand harsh environmental conditions such as high temperatures and vibration.
What Are Some Common Applications for Automotive Power Relays?

What Are Some Common Applications for Automotive Power Relays?

  • Industrial machinery control

  • HVAC systems

  • Power distribution and control systems

  • Automotive and transportation systems

  • Medical equipment

  • Home automation systems


How Does an Automotive Power Relay Work?

How Does an Automotive Power Relay Work?

A power relay works by using an electromagnetic field to open or close a set of contacts. The basic components of a power relay are a coil, an armature, and a set of contacts. When voltage is applied to the coil, it creates a magnetic field that attracts the armature. The armature is a movable piece of metal that is connected to the contacts. When the armature moves, it closes or opens the contacts, allowing or interrupting the flow of current through the load.


The coil and contacts are typically housed in a protective enclosure, such as a plastic or metal casing, to prevent damage and ensure safety. The enclosure may also contain additional components, such as a diode or capacitor, to protect the relay from voltage spikes or other electrical disturbances.


The operation of a power relay can be controlled by various means, such as manual switches, timers, or programmable logic controllers (PLCs). Power relays are commonly used in industrial, commercial, and residential applications to control high voltage and high current loads, such as motors, heaters, lights, and appliances.

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