Power Supply 12V 4A 5.5mm No name (MPN 12V/4A/5.5)

Power Supply 12V 4A 5.5mm No name is an AC/DC adapter that provides a regulated 12 V DC output with a maximum current of 4 A through a standard 5.5 mm barrel connector. The compact design is intended for continuous operation and serves as a replacement or spare power source for devices that require a stable 12 V input via a 5.5 mm plug. It is suitable for a range of small electronics where a reliable low-voltage DC supply is required.

Advantages

This power supply delivers a stable 12 V output up to 4 A, reducing voltage fluctuations under moderate loads. The common 5.5 mm barrel connector ensures broad compatibility with many consumer and professional devices. Its compact adapter housing simplifies installation in constrained spaces and reduces cable clutter. Built to operate continuously, the adapter provides a practical spare or replacement option for systems that cannot tolerate frequent power interruptions.

Suitable for

• Home and office routers and network equipment that accept 12 V/5.5 mm power
• LED strips and lighting modules running on 12 V DC
• CCTV and small surveillance cameras requiring low-voltage DC input
• Small appliances and hobby electronics that specify 12 V and up to 4 A
• Replacement or spare power source for compatible consumer devices

Key specifications

• Output voltage: 12 V DC
• Maximum output current: 4 A
• Connector type: 5.5 mm barrel plug (outer sleeve positive or negative depending on device — verify polarity)
• Intended use: continuous DC power delivery for low-voltage devices
• Form factor: compact external adapter suitable for wall- or desk-mounted use

How to use

Confirm that the target device requires a 12 V DC supply and that its maximum current draw does not exceed 4 A. Verify the polarity of the device’s barrel jack before connection to prevent damage. Plug the adapter into a compatible mains outlet, then insert the 5.5 mm barrel connector into the device’s power input until it seats firmly. If the device includes power indicators, check for normal operation after connection. Disconnect the adapter from the mains before unplugging from the device and avoid connecting to devices with incompatible polarity or voltage requirements.

Usage recommendations

Use in well-ventilated areas to allow heat dissipation during continuous operation, avoid exposure to moisture, and ensure the adapter’s current rating meets or exceeds the device’s demand. If unsure about polarity or compatibility, consult the device manual or a qualified technician before use.