UL1310 is a safety standard developed by Underwriters Laboratories (UL) that applies to Class 2 power units. It defines requirements for power supplies that deliver limited voltage and current levels, reducing the risk of electric shock and fire in electrical systems.

Power supplies that comply with UL1310 are designed to operate within strict output limits, making them suitable for applications where safety and simplicity are critical.

Why UL1310 Matters

UL1310 ensures that power supplies meet defined safety limits, allowing them to be used in a wide range of low-voltage applications without requiring complex protective measures. Key benefits include:

• Reduced risk of electric shock
• Lower fire hazard due to limited power output
• Simplified installation requirements
• Compliance with recognised safety standards

This makes UL1310-compliant power supplies particularly useful in environments where user safety is a priority.

What Is a Class 2 Power Supply

UL1310 is closely linked to the concept of Class 2 power supplies.

A Class 2 power supply is designed to limit its output to safe levels, typically:

• Maximum 60V DC
• Power output limited to 100W or less

Because of these limits, additional protective measures such as heavy insulation or specialised enclosures are often not required.

Where UL1310 Is Used

UL1310-compliant power supplies are commonly used in:

• LED lighting systems
• Door entry and access control systems
• Security and alarm systems
• Low-voltage control circuits
• Building automation systems

These applications benefit from safe, reliable power without the need for complex electrical protection.

UL1310 vs Other Standards

UL1310 differs from other power supply standards in its focus on limited power outputs:

• UL1310 applies to Class 2 power units with restricted voltage and current
• UL60950 and UL62368 apply to IT and audio-visual equipment
• UL508 applies to industrial control equipment

Understanding these differences helps ensure the correct standard is applied to each application.

Key Considerations

When selecting a UL1310-compliant power supply, consider:

• Output voltage and current limits
• Total power rating
• Application requirements
• Compatibility with connected devices

Choosing the correct Class 2 power supply ensures both safety and reliable performance.