IEC 60134:1961 pdf download,Rating systems for electronic tubes and valves and analogous semiconductor devices.
IEC 60134:1961 defines and explains rating systems used for electronic tubes and valves and for analogous semiconductor devices. Its focus is not on a specific device model, but on how ratings are established, described, and interpreted so that engineers understand what the stated limits mean for real circuit use. The standard aims to clarify the division of responsibility between the manufacturer (who defines ratings and operating conditions) and the circuit designer (who must apply those ratings appropriately within the intended circuit design). It supports consistent documentation and communication of capabilities such as operating conditions and allowable stresses, helping ensure that device ratings are applied correctly when selecting components or evaluating suitability for a given electrical application.