How to find the right LED power supply?

Table of contents

• 1) Nameplate: what to read
• 2) CV or CC: how to identify
• 3) Power headroom: safe selection
• 4) IP rating: environment and mounting
• 5) Dimensions: when space is limited
• 6) Unavailable model: equivalent replacement
• FAQ

1) Nameplate: what to read

Start with what is printed on the PSU. Take a clear photo of the label. Key fields: Output, Voltage, Current, Power, IP, and sometimes Dimensions.

What to capture

• Output: voltage or current, power, current or voltage.
• Input: mains range (for example 200-240V AC).
• IP: for example IP20, IP33, IP65, IP68.
• Dimensions: if installation space is limited.

2) CV or CC: how to identify

Constant Voltage (CV)

CV units always show a fixed output voltage: 12V, 24V, 5V, etc. This is standard for LED strips and many LED modules.

Example:

Output: 12V, 100W, 8.33A

Constant Current (CC)

CC drivers are often labeled Constant Current Power Supply and specify output current such as 350mA, 500mA, 700mA. The label usually also shows max power and an operating voltage range.

Example:

Output: 700mA, 50W, 18-72V

CC: minimum operating voltage matters

A CC driver has a lower voltage limit. If the load is too small and the operating voltage drops below the minimum, it may not work correctly.

Adjustable current CC drivers

If you see Configurable, Flex Current, or Adjustable Current, the driver can be set to one of several output current values.

3) Power headroom: safe selection

Choose headroom. It improves stability, reduces heat, and extends lifetime.

• Recommended headroom: 20-30% above the real load.
• For enclosed installations and continuous use: aim closer to 30%.

4) IP rating: environment and mounting

• IP20 - indoor, dry areas.
• IP33 - light protection.
• IP65 - moisture and splashes.
• IP68 - demanding environments.

Sometimes a different IP rating than the original PSU can be used, but the decision depends on real conditions. If it matters, consult our specialist.

5) Dimensions: when space is limited

In many installations, size is the constraint. Verify length, width, height, and cooling conditions in the mounting space.

6) Unavailable model: equivalent replacement

There is always a solution. A correct replacement can always be matched to the requirements. If your model is unavailable or you are unsure what to search for, we will recommend the right PSU or a true equivalent.

FAQ

CV shows a fixed output voltage (12V or 24V). CC shows output current (for example 700mA) and often says Constant Current Power Supply.

It is a 12V constant voltage PSU. Max power is 100W and max output current is 8.33A.

Yes. The load draws only what it needs. Keep the key parameters correct: CV or CC and voltage or current. Although there are CC power supplies which work best being loaded by almost 100%.

Sometimes yes, depending on real conditions. If it matters, consult our specialist to avoid risk.

Send a nameplate photo, available installation dimensions, load type, and environment details. We will recommend the correct solution.