IEC 60898-3:2019

Overview

IEC 60898-3:2019 specifies requirements for DC circuit-breakers intended for overcurrent protection in household and similar wiring installations. The standard covers circuit‑breakers for DC operation with a rated DC voltage ≤ 440 V, rated current ≤ 125 A and rated short‑circuit capacity ≤ 10 000 A. These devices are designed for use by uninstructed people and for installations that are not intended to be maintained.

Key topics and technical requirements

• Scope and classification – Definitions, device types, number of poles and current direction through poles for DC operation.
• Rated quantities – Rated DC voltage, rated current and rated short‑circuit capacity within the values above.
• Construction and safety – Mechanical design, protection against electric shock, clearances and creepage distances for insulation coordination.
• Performance characteristics – Tripping characteristics (time‑current and instantaneous), behaviour at small DC currents and making (inrush) currents, temperature rise and continuous duty.
• Terminals and connections – Requirements for screws, current‑carrying parts, terminal reliability and non‑interchangeability.
• Marking and information – Mandatory marking and product information for safe installation and use by non‑specialists.
• Testing and verification – Extensive type tests including dielectric strength, insulation resistance, humidity resistance, temperature rise, mechanical and electrical endurance, short‑circuit performance and verification of tripping characteristics.
• Annexes – Normative annexes include methods for determining clearances/creepage and test sequences/sample requirements.

Applications and who uses this standard

IEC 60898-3:2019 is used by:

• Manufacturers developing DC circuit-breakers for residential and similar installations.
• Test and certification laboratories performing type and routine testing to verify compliance.
• Electrical specifiers and designers selecting overcurrent protection for building DC circuits (e.g., small DC distribution, battery and PV subsystem protection in dwellings).
• Regulatory bodies and procurement teams creating product requirements and compliance criteria for household electrical safety.
• Installers and inspection authorities relying on standard marking and information to ensure safe, non‑specialist use.

Related standards

• Other parts of the IEC 60898 family (covering AC and general overcurrent protection for household installations).
• Low‑voltage switchgear and protection standards (for broader industrial/residential contexts), and national wiring regulations that reference IEC standards.

Keywords: IEC 60898-3:2019, DC circuit-breakers, overcurrent protection, household installations, rated DC voltage 440 V, rated current 125 A, short-circuit capacity 10000 A, tripping characteristic, insulation, creepage, type tests.