STP 3A 12V DC CCTV Power Supply Unit for Cameras and Access Control

A 3A 12V regulated power supply is the standard single-camera and small-system power option for CCTV and access control installations. Most HDCVI and analogue CCTV cameras draw between 350mA and 750mA at 12V, meaning the 3A supply can safely power two to four cameras depending on their individual current draw.

The regulated DC output maintains a stable 12V regardless of load variation, which is important for CCTV cameras: fluctuating supply voltage causes image quality instability, and in worse cases resets the camera.

For multi-camera installations beyond the 3A capacity, the Haydon 9-way 5A power box provides centralised multi-output distribution at higher total current. For larger systems, dedicated multi-output racks or switched-mode CCTV power distribution is the correct specification.

Installers should verify the total current draw of connected cameras before selection: add the individual camera current figures and apply a 20% headroom above the total before selecting the power supply rating.

For CCTV installers and access control engineers powering cameras and devices across London and the UK, the STP 3A 12V PSU provides the standard single-circuit DC supply for small device groups.

Key Features

• 3A at 12V DC: regulated output for CCTV cameras and access control devices
• Powers 2-4 cameras depending on individual current draw within 3A limit
• Regulated output: stable 12V prevents camera instability from supply fluctuation
• For larger multi-camera power needs use Haydon 9-way 5A power box
• Verify total camera current draw and add 20% headroom before selecting
• Standard single-circuit DC supply for small camera groups