How much clearance do I need for a modular power supply?

This will require clearance limit 1.48 times of IEC/UL 60950-1 unless your device marked as suitable for use only up to 2000 m New modular power supply has been designed to exceed regulatory safety requirements at 5000 M for creepage and clearance. The new product is fanless.

What are the requirements for equipment clearance in IEC 62368-1?

A: The clearance of equipment set in the IEC 62368-1 assumes operating at 2000 meters above sea level, maximum. If there is a high-altitude requirement, the creepage and clearance dimensions must take this into account, and the various creepage and clearance numbers must be adjusted.

How important is high-voltage PCB spacing and IC package selection?

High-voltage PCB spacing and IC package selection are increasingly important to achieve the highest possible power density while still complying with safety and design guidelines. Challenges come from multiple angles, however. As a designer, you must understand: creepage and clearance.

What is the minimum clearance distance for an electrical device?

To determine the minimum clearance distance, refer to Table 1 below, adapted from the IEC 60664-1 standard. Based on the table, the minimum required clearance distance for our example is 1.5 mm.

How to determine the creepage of a power supply?

The first step is to determine the required creepage, which requires knowledge of the working voltage, pollution degree and material group. The highest working voltage inside this converter is 400 V, as that is the DC link voltage. The pollution degree will be 2 because this power supply will be inside an enclosure for telecommunications equipment.

How much clearance do you need for a rated impulse voltage?

From the table, you will find that for a 2.5-kV rated impulse voltage, you need 3.6 mm of clearance for reinforced isolation. This is more conservative than the 3 mm of clearance that you would have gotten from using 4 kV in IEC 60664-1 Table