Which type of relay typically has multiple poles?

A double throw relay is designed to have multiple contacts or poles, allowing it to switch between two different circuits or states. This type of relay can connect to one of two output paths, enabling complex control operations in a system.

For example, in air conditioning systems, a double throw relay can be utilized to switch between heating and cooling modes or to direct power to different components depending on the system's operational mode. This versatility is crucial in applications where different configurations are needed based on the operational requirements. The ability to manage multiple circuits simultaneously makes double throw relays particularly useful in residential air conditioning and HVAC systems where efficiency and adaptability are essential.

The other types of relays mentioned do not offer the same functionality. A normally closed relay often features a single contact configuration that is closed by default. A single throw relay, as the name suggests, connects to only one circuit and does not have the capacity to switch between multiple circuits. A magnetic relay can have various designs, but it is not specifically known for its multiple pole configurations like the double throw relay.