What are Signal relays?

Signal relays are small mechanical relays with modest current and voltage ratings. These types of relays are similar to power relays but rated for lower voltages, smaller in size and faster. 

Signal relays can control a single circuit by opening and closing contacts in a different circuit. Typically, a signal relay will be used to switch low level currents effectively. 

Signal relays are composed of coil that is secondary moulded, providing high insulation between the contact and coil. These types of relays mainly have a c-contact structure. 

Applications of signal relays 

Signal relays are used in several applications including:

• Security devices – e.g. detectors, control panels
• Testing and measuring devices – e.g. oscilloscopes, ATEs (Semiconductor test equipment)
• Industrial devices – e.g. Machine tools