AC-DC Linear Power Supply 12V DC @ 500mA, 2.5mm x 5.5mm Center Positive | PV-1250B
AC-DC Linear Power Supply — 12V DC @ 500mA |
Part PV-1250B
The PV-1250B is a wall-mount AC-DC linear power supply delivering clean, stable 12V DC at 500mA — the reliable choice for low-noise, low-ripple applications where switching power supplies introduce unwanted interference. Linear design means no switching noise, making it ideal for audio equipment, sensitive sensors, and legacy electronics that demand clean DC power.
Technical Specifications
- Part Number: PV-1250B
- Input: 120V AC, 60Hz (standard US wall outlet)
- Output: 12V DC @ 500mA (0.5A)
- Connector: 2.5mm (ID) x 5.5mm (OD) barrel plug — center positive (+)
- Type: Linear wall-mount power supply (non-switching)
- Polarity: Center positive (+)
Common Use Cases & Compatible Devices
- CCTV security cameras requiring 12V DC @ 500mA with a 2.5mm barrel connector
- LED lighting controllers and low-power LED drivers
- Audio pre-amplifiers and signal processors sensitive to switching noise
- Routers, modems, and networking hardware with 2.5mm DC inputs
- Sensors, actuators, and industrial control modules
- Legacy electronics and hobbyist projects requiring clean 12V DC
- Any device requiring a 2.5mm x 5.5mm center-positive 12V DC supply
Why Linear vs. Switching?
Linear power supplies produce significantly less electrical noise than switching (SMPS) designs. For audio equipment, RF receivers, and sensitive measurement devices, a linear supply like the PV-1250B eliminates the high-frequency interference that can degrade performance or cause audible hum.
Frequently Asked Questions
Q: What is the connector size on this power supply?
A: The output connector is a 2.5mm (inner diameter) x 5.5mm (outer diameter) barrel plug with center-positive polarity. This is slightly larger than the common 2.1mm barrel — verify your device's jack size before ordering.
Q: Can I use this with a device that requires 2.1mm?
A: No — the 2.5mm plug will not fit a 2.1mm jack. See our DC barrel adapter line to convert between sizes.
Q: Is this regulated?
A: Linear power supplies are typically non-regulated. Output voltage may measure slightly higher than 12V under no-load conditions and will settle to rated voltage under load.
Q: What is the difference between this and a switching power supply?
A: Linear supplies are quieter (less electrical noise) but less efficient. Switching supplies are more efficient but generate high-frequency noise. For noise-sensitive applications, linear is preferred.
