12V AC-AC Power Adapter 5000mA (5A) | 2.1mm x 5.5mm Desktop Transformer | AC-125AC

12V AC-AC Linear Wall Transformer — 5000mA (5A)

Part AC-125AC

The AC-125AC is a desktop-style linear AC-to-AC power adapter delivering 12V AC output at 5000mA (5A). It includes a 2.1mm x 5.5mm straight barrel plug. Use this transformer only when your device specifically requires 12VAC alternating current (~), accepts up to 5A, and the connector dimensions match.

⚠️ Critical Note: This is an AC-AC adapter. It outputs alternating current, not DC. A device labeled 12VDC is not compatible. Verify the device label for the ~ symbol or VAC before purchasing.

Technical Specifications

• Model: AC-125AC
• Input: 120V AC, 60Hz
• Output: 12V AC at 5000mA (5A), approximately 60VA
• Connector: 2.1mm (ID) x 5.5mm (OD) straight barrel plug
• Type: Linear desktop-style transformer (non-regulated)

Common Use Cases & Compatible Devices

• Large CCTV and DVR/NVR Systems: Equipment requiring high-current 12VAC through a compatible barrel connector
• Professional Audio and AV Equipment: Mixers, rack equipment, and other equipment that specifically requires high-current AC power
• High-Draw Access Control Equipment: Commercial control boards or panels with a compatible 12VAC barrel input
• Industrial and Commercial Control Equipment: Desktop-style equipment requiring sustained 12VAC output at up to 5A

Common Replacement Compatibility

Use as a replacement only when the original adapter or device label specifies 12VAC, a compatible 2.1mm x 5.5mm connector, and current requirements of no more than 5000mA (5A). Confirm the connector fit, AC output requirement, and desktop form factor before connecting.

Frequently Asked Questions

Q: How do I know if my device needs AC or DC?
A: AC is shown by the ~ symbol or the letters VAC. DC is shown by VDC or the DC symbol. This adapter is not for DC-only devices.

Q: Why can a voltmeter show more than 12V?
A: This is a non-regulated linear transformer. Its no-load voltage can measure higher than the rated output until a device is connected.

Q: Does the connector have polarity?
A: AC output does not use positive or negative DC polarity, but the connector dimensions and device voltage requirement must still match.

Q: What should I verify before ordering?
A: Confirm that your device requires 12VAC, accepts up to 5A, uses a 2.1mm x 5.5mm barrel connection, and can accommodate a desktop-style transformer.