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There are five legitimate ways to get the official PDF, ranging from free previews to multi-user licenses.

: Distinguishes between the Original Manufacturer (who designs and verifies the system) and the Assembly Manufacturer (who builds the final unit).

To comply with IEC 61439-1, an assembly must be defined by several critical parameters: The maximum voltage the assembly is designed to handle. Short-circuit Withstand ( Icwcap I sub c w end-sub

The IEC 61439 series is continuously maintained by TC 121 (Low-voltage switchgear and controlgear assemblies). Future amendments (likely in 2025–2026) may include: