power supply unit 12v 3a / 5a

Product Description

The 12V 3A / 5A Power Supply Unit (PSU) is a regulated power supply designed to convert AC mains electricity into a stable 12V DC output for electronic security and access-control equipment. Depending on the model, it can provide up to 3A or 5A of current, making it suitable for powering devices such as magnetic locks, electric strikes, access-control keypads, card readers, CCTV equipment, and other 12V devices.

Key features

• ⚡ 12V DC regulated output — provides stable power to connected equipment.
• 🔌 3A or 5A capacity — the 5A version can support a higher total load than the 3A version.
• 🔋 Optional battery backup — compatible models can accommodate a 12V 7Ah rechargeable battery, allowing connected security equipment to continue operating during a mains failure.
• 🛡️ Protection features — commonly includes overload, over-voltage and short-circuit protection.
• 🚪 Access-control outputs — versions designed for access control may provide connections for electric locks and access-control equipment.
• ⏱️ Adjustable delay function — some access-control versions include a relay delay, typically adjustable for lock-release applications.
• 🧰 Metal enclosure — commonly supplied in a metal case for protection and improved durability.
• 🔄 Battery charging — compatible models can charge the connected backup battery while mains power is available.

Typical specifications

Specifications can vary between manufacturers and individual PSU models.

How it works

The PSU receives AC mains power, converts it to 12V DC, and supplies that voltage to the connected security equipment. In models with battery backup, the PSU also maintains the rechargeable battery while mains power is available. If mains power fails, the battery can supply the connected equipment, helping maintain operation.

Typical applications

• 🔐 Access-control systems
• 🚪 Magnetic locks (maglocks)
• 🔑 Electric strikes
• 🔢 Access-control keypads
• 🪪 RFID/card readers
• 📹 CCTV equipment
• 📞 Intercom systems
• 🚨 Security alarm equipment
• 🚪 Automatic door systems