EN 50130-4 is a European standard that specifies the immunity requirements for components of fire, intruder, hold-up, and social alarm systems. These systems are designed for use in both indoor and outdoor environments in residential, commercial, and light industrial applications. The standard sets out immunity levels for various environmental conditions and specifies test methods to ensure that these systems can operate reliably in the presence of electromagnetic disturbances. It covers immunity to electromagnetic fields from radio frequency (RF) transmitters, conducted disturbances, and transient electrical bursts. Compliance with EN 50130-4 helps ensure that alarm systems are not susceptible to interference that could compromise their functionality or reliability during critical operations.