What is the difference between EN 60950 and EN 62368?

In the realm of electrical safety standards, there are various codes and regulations that ensure the safe operation of consumer electronics. Two important standards for product safety are EN 60950 and EN 62368, which outline requirements for Information Technology Equipment (ITE) and Audio/Video Equipment (AV), respectively. While both standards focus on ensuring the safety of end-users, there are significant differences between them in terms of scope, methodology, and testing criteria.

Scope and Application

EN 60950, also known as IEC 60950, primarily applies to IT equipment such as computers, servers, switches, routers, and telecommunication devices. It covers the safety of low voltage electronic equipment with a rated voltage up to 600 volts, including both external power supplies and components. This standard is widely adopted across the globe and has been in use for many years.

In contrast, EN 62368, also known as IEC 62368, is a relatively newer standard that applies to AV and ICT (Information and Communications Technology) equipment. It focuses on ensuring safety in audio/video equipment, broadcast receivers, television sets, and similar devices. The scope of this standard includes not only traditional AV equipment but also network-dependent devices, multimedia devices, and products integrating multiple technologies, such as smart TVs and IoT devices. EN 62368 is gradually replacing EN 60950, as it covers a wider range of products.

Methodology and Approach

Both EN 60950 and EN 62368 follow a hazard-based safety engineering (HBSE) approach, aiming to identify potential hazards, evaluate risks, and implement necessary safeguards to mitigate those risks. However, the methodologies used in these two standards differ slightly.

EN 60950 relies on a prescriptive approach, specifying detailed requirements for electrical insulation, clearance, creepage distances, energy limits, and other safety considerations. It includes fixed criteria for product components and focuses on preventing direct physical contact with hazardous parts or electric shocks.

On the other hand, EN 62368 takes a more performance-based approach, emphasizing hazard-based engineering design principles. It introduces concepts like energy levels, fire propagation, and safeguards against excessive heat accumulation. This standard emphasizes evaluation of hazards caused by abnormal conditions, such as overheating, component failure, or misuse of equipment.

Testing Criteria

When it comes to testing, both EN 60950 and EN 62368 prescribe specific test methods and procedures to ensure compliance with safety requirements.

EN 60950 testing primarily involves evaluating insulation, protection against electric shock, mechanical strength, energy hazards, and fire resistance. It includes tests like dielectric strength, heating, abnormal operation, impact resistance, and flame resistance.

EN 62368 testing focuses on similar aspects but also adds evaluation criteria related to energy levels, risk of fire initiation and propagation, and resistance to heat and fire. It includes tests such as abnormal and fault conditions, energy source detection, abnormal power input, and stability during operation.

Overall, while both EN 60950 and EN 62368 strive to ensure safe operation of electronic equipment, the latter provides a more updated and comprehensive framework for addressing emerging technologies and interconnected devices. Compliance with these standards not only guarantees the safety of end-users but also helps manufacturers meet regulatory requirements and gain market acceptance for their products.