IEC 60063:2015 defines preferred number series for resistors and capacitors, providing a common basis for selecting standardized component values in engineering and procurement workflows. It is relevant where design teams need operational consistency across product families, documentation, and part selection, especially when technical review and conformity assessment depend on predictable value progression. IEC 60063:2015 helps organizations align component choices with established preferred series rather than using arbitrary values that can complicate verification activities and supply-chain control.

Purpose of IEC 60063:2015

The purpose of this technical document is to establish preferred numerical series for resistors and capacitors so that design and manufacturing teams can use a consistent set of component values. In practice, that supports engineering specification writing, product evaluation, and documented evaluation of component selections. By standardizing value series, the document can reduce ambiguity during technical assessment, improve interchangeability, and support quality workflows where repeatable component choices are important for electrical equipment and related assemblies.

Compliance applications of IEC 60063:2015

IEC 60063:2015 is commonly used when preparing bills of materials, reviewing schematic designs, or validating component selections against established value series for passive parts. It may also support laboratory evaluation, procurement review, and conformity assessment preparation where resistance and capacitance values need to match recognized preferred series. In engineering documentation and testing workflows, the reference can help maintain alignment between design intent, purchased components, and operational consistency across production variants.

Benefits of IEC 60063:2015

Using IEC 60063:2015 can improve interoperability between design, sourcing, and test teams by giving them a shared reference for preferred resistor and capacitor values. That consistency may reduce selection errors, support technical validation, and simplify comparison across alternatives during product evaluation. It also helps with risk management by limiting unnecessary variation, which can improve procurement efficiency, testing consistency, and quality assurance during regulatory preparation or other compliance workflows.

• Preferred number series for resistor and capacitor value selection
• Useful for schematic design, BOM control, and component sourcing
• Supports documented evaluation and technical review of passive component choices
• Helps maintain consistency in verification and conformity assessment activities