IEC 60695-11-4:2011 provides a description of the apparatus required to produce a 50 W test flame and a description of a calibration procedure to check that the test flame produced meets given requirements. Guidance on confirmatory tests for test flames is given in IEC 60695-11-40. This first edition of IEC 60695-11-4 cancels and replaces the second edition of technical specification IEC/TS 60695-11-4 published in 2004. It constitutes a technical revision. The main changes with respect to the previous edition are the integration of minor editorial and technical changes throughout the text. This publication is to be read in conjunction with IEC 60695-11-4:2011.