Which products are affected?What are the most relevant changes in the standard? Optional or additional inclusion of utilization category AC-3e alongside the previous utilization category AC-3. The new category emphasizes suitability for switching high-efficiency motors (e.g. motors of efficiency classes IE3 or IE4)Data on rated operational voltages must be specified more precisely in relation to the valid line system configurationData on short-circuit protection of all connections. In addition to the previous data on short-circuit protection of the main and auxiliary current paths, data must also be specified, for example, for control supply voltage connections and digital inputs or outputs Extensions to the product documentation to cover safe handling of devices with integrated energy storageWhat have we changed on our products or in the documentation as a result?Regarding 1 AC-3e:An AC-3e utilization category is added only for devices that previously had AC-3, i.e. for devices that are actually capable of switching motors, such as contactors or motor starters, but not, for example, overload relays. If, in the future, only an AC-3e is specified, this can also be assumed to be the AC-3 value. The AC-3e is important, above all, for switching and protecting high-efficiency motors of classes IE3 or IE4. The new utilization category codifies in the standard what our devices have been capable of for years: our switching and protection devices are IE3 and IE4-ready.More on switching and protecting high-efficiency motors here: Link: With SIRIUS: IE3/IE4-ready switching and protecting  Regarding 2 To specify the voltage more precisely, the line system configuration, for which the specified rated operational voltage applies, must be stated.In Catalog IC10, for example, this is implemented as follows:VoltagesThe specifications for 3-phase line supply according to IEC 60947-4-1 apply for the following line system configurations:Regarding 3 Manufacturer documentation on protecting all device connections For main and auxiliary circuits, data on protecting against short circuit with fuses, circuit breakers, or miniature circuit breakers are stated in the product documentation, for example, on the product data sheet. However, this does not cover all possible connections of the devices, for example, control supply voltage connections, supply voltage connections, or digital inputs or outputs of the devices. If these are not connected to self-limiting current or power sources, the manufacturer must provide suitable information to enable protection against short circuit and overcurrent.   Example  -   Controlling contactors: First of all, the relevant standards and regulations for configuring control panels and the parts and components contained in them must be taken into account, for example, when considering cable dimensioning. One possible protection for these circuits could be the selection of a suitable power supply with a current-limiting function. In the selection of the source and the connection cable, the load characteristics of the contactor must be considered (short-time inrush current peaks for electronic contactor drives, switch-on power, holding power). If there are further switching elements in the circuit, such as the auxiliary contact system of an overload relay that operates the contactor, the short-circuit protection necessary for this must also be considered. You will find further recommendations, e.g. the use of miniature circuit breakers or circuit breakers for equipment in control circuits, at the following link: Control panel tip: Fast, reliable selection and dimensioning of an appropriate power supply unit    Example  -   Digital inputs or outputs on contactors: In addition to classic contactor control via a control supply voltage (power supply and control on the same cable), there are also devices in which the power supply and control signal are separate. For these, too, both circuits must be protected against short circuit and overload by suitable measures. Contactors with digital inputs (PLC input) 3RT1...-.N... and 3RT1...-.P... and 3RT1...-.S.../3RT2...-.S...:Protection of the digital input (for 3RT1...-P..., this is IN+/IN-, for 3RT1...-.S.../3RT2...-.S..., this is +/-) with a typical rated current of approx. 20 mA can be assumed to be appropriate based on its type according to IEC60947-4-1 and the protection provided accordingly. For versions 3RT1...-.N... and  3RT1...-.P..., the supply voltage connection A1/A2 must be protected against short circuit and overload, for devices  3RT1...-.S..., protection of A1/A2 is already integrated in the device.The connection H1/H2 for 3RT1...-P... does not have to be separately protected, ifA1/A2 has already been protected. For the relay connection R1/R2, the data must derived analogously from the data on protection for the main and auxiliary circuits stated in the technical data, for example, from the data sheet. Regarding 4 Warning notices must be included both in the product documentation and, in some cases, on the product.Example: 3RT2916-1PA EMC interference suppression module