IEC 61558-2-5:2024

Overview

IEC 61558-2-5:2024 is the International Electrotechnical Commission standard that specifies safety requirements and tests for shaver transformers, power supply units for shavers and shaver supply units. This third edition (2024) cancels and replaces the 2010 edition and constitutes a technical revision. It covers stationary, single-phase, dry-type, air-cooled transformers (encapsulated or not) and shaver transformers that incorporate electronic circuits. Key rated limits in the scope include rated supply voltage ≤ 250 V AC, internal operating frequency ≤ 500 Hz (with SMPS combinations handled via IEC 61558-2-16), rated output between 20 VA and 50 VA, and no‑load output voltage up to 275 V AC.

Key topics and technical requirements

This part of the IEC 61558 series supplements IEC 61558-1:2017 and addresses particular requirements and tests specific to shaver-related equipment. Principal topics include:

• Protection against electric shock (SELV considerations and double/reinforced insulation)
• Insulation and dielectric tests: insulation resistance, dielectric strength and leakage current tests
• Thermal performance and heating: temperature limits and heating tests
• Short‑circuit, overload and protection: short-circuit voltage, overload protection and fault behavior
• No‑load and loaded output characteristics: output voltage and current under load, no‑load output checks
• Mechanical and environmental tests: mechanical strength, ingress protection, resistance to heat, fire and tracking, rusting
• Construction and components: internal wiring, terminals, screws/connections, and use of components
• Marking, classification and ratings: identification, symbols (including a new symbol for linearly regulated output), and rating information
• Specific test procedures and general notes on tests as referenced in the standard

(The standard is a group safety publication in accordance with IEC Guide 104.)

Practical applications and users

IEC 61558-2-5:2024 is essential for:

• Manufacturers and designers of shaver transformers, shaver power supply units and integrated bathroom/mirror luminaires with shaver sockets
• Product safety engineers ensuring compliance with electrical and thermal safety for bathroom equipment and SELV circuits
• Test laboratories and certification bodies performing conformity assessment and safety testing
• Regulatory and compliance teams that apply IEC 61558 series requirements in national or market approvals

Use cases include design validation for shaver sockets in mirrors, bathroom power supply units, and combined luminaires that include shaver outlets.

Related standards

• IEC 61558-1:2017 - General requirements for safety of transformers and power supply units (primary reference)
• IEC 61558-2-16 - Particular requirements for switch‑mode power supply units (used in combination where applicable)
• IEC Guide 104 - Group safety publications and their scope

Keywords: IEC 61558-2-5:2024, shaver transformers, shaver power supply units, transformer safety, electrical safety standard, SELV, IEC 61558.