The contact configuration of PCB power relay can be selected according to the application requirements. The following are some common contact configurations:
Single Pole, Single Throw (SPST): This configuration has only one switchable contact that can connect one circuit to another, or disconnect it. This configuration is typically used for simple switch applications with only two states: on and off.
Single Pole, Double Throw (SPDT - Single Pole, Double Throw): This configuration has a switchable contact, but it can be connected to either of two different circuits. It allows switching between two different circuits. This configuration is often used in applications that require switching circuits, such as switching power sources or switching signal routes.
Double Pole, Single Throw (DPST): This configuration consists of two independent single-pole, single-throw switches that can connect or disconnect two different circuits at the same time. It is suitable for applications where two identical circuits need to be controlled, but they can be controlled independently.
Double Pole, Double Throw (DPDT): This configuration consists of two independent SPDT switches, each of which can be connected to one of two different circuits. It allows complex switching between two circuits and is typically used in applications requiring multiple modes of operation.
These are some common contact configurations, but there are other, more complex configurations depending on the needs of the application. Choosing the correct contact configuration depends on your circuit design and the circuit you need to control. When selecting a PCB power relay, refer to the relay's specification sheet and data sheet to ensure the relay selected has the required contact configuration and performance characteristics.