12V 3A AC-DC Power Supply - 2.1mm x 5.5mm Center Positive | SW-123V
Regulated 12V 3A AC-DC Switching Power Supply | Part SW-123V
The SW-123V is a compact, regulated switching power supply that converts standard 100–240V AC wall power to a stable 12V DC @ 3000mA (3A) output. With universal input voltage compatibility and a standard 2.1mm x 5.5mm center-positive barrel connector, it's a reliable replacement or upgrade power supply for a wide range of commercial and consumer devices.
Technical Specifications
- Part Number: SW-123V
- Input Voltage: 100–240V AC, 50/60Hz (universal — works worldwide)
- Output Voltage: 12V DC
- Output Current: 3000mA (3A)
- Output Power: 36W
- Connector: 2.1mm (ID) x 5.5mm (OD) barrel plug — center positive (+)
- Regulation Type: Switching (regulated)
- Form Factor: Wall-mount
Compatible Devices & Common Use Cases
- 12V LED light strips and LED drivers (up to 36W)
- CCTV cameras and IP security cameras requiring 12V DC
- Routers, modems, and networking equipment
- NAS drives and small network-attached storage devices
- Industrial sensors, actuators, and control systems
- Hobby electronics, Arduino/Raspberry Pi projects requiring 12V
- Small motors, solenoids, and automation components
Why a Switching Power Supply?
Switching power supplies are more efficient than linear supplies, generating less heat and maintaining stable output voltage even as load varies. The SW-123V's regulated output ensures your connected device receives a consistent 12V regardless of input voltage fluctuations — critical for sensitive electronics and monitoring equipment.
Frequently Asked Questions
Q: What devices is this compatible with?
A: Any device requiring 12V DC at 3A (36W) or less with a 2.1mm x 5.5mm center-positive barrel connector — including LED strips, CCTV cameras, routers, and more.
Q: Will this work outside the US?
A: Yes. The 100–240V AC universal input supports use in North America, Europe, Asia, and most other regions (plug adapter may be required).
Q: Is the output center positive or center negative?
A: Center positive (+). The inner pin of the 2.1mm x 5.5mm barrel connector is positive.
Q: Can I use this for a 12V LED strip?
A: Yes, provided your LED strip draws 3A (36W) or less. For higher-wattage installations, you'll need a higher-amperage 12V supply.
Q: Is this regulated?
A: Yes. This is a regulated switching power supply, meaning the output voltage stays stable at 12V across varying load conditions.
