BS EN IEC 63522-49:2025

1   Scope

  This part of [IEC 63522](/search?q=IEC%C2%A063522)
   is used for testing all kinds of electrical relays and for evaluating their ability
  to perform under expected conditions of transportation, storage and all aspects of
  operational use. 

    NOTE  Examples for electrical relays in the sense of this document include electromechanical
     relays, reed relays, reed contacts, reed switches, solid state relays, time relays
     and technology combinations of these. 

This document defines a standard test method for long term stability of sealing.