9V 1A AC Power Adapter

This linear power adapter designed for devices that require an unregulated alternating current (AC) input. This unit is commonly used for specialized electronics—such as audio mixers, networking modems, and certain security systems—that perform their own internal rectification and regulation. Its robust, transformer-based design provides excellent isolation and durability for continuous-duty applications.

Technical Architecture & Power Profile

• AC-AC Linear Topology: This adapter converts high-voltage wall current directly to low-voltage AC via a copper-wound transformer. It does not contain a rectifier bridge; the output maintains the same 50/60Hz frequency as the input.

• 1000mA Current Ceiling: With a full 1.0 Amp (9VA) capacity, this unit provides sufficient "headroom" for devices that experience peak power draws during startup or high-load operations.

• Thermal Protection: Integrated internal thermal fusing protects the primary windings from overheating in the event of an output short circuit or prolonged overload.

• Passive Cooling: The oversized housing is designed for efficient heat dissipation, maintaining a stable operating temperature even under a constant 100% load.

Technical Specifications

• Model: DV-91AACUP
• Input Voltage: 230V - 240V AC
• Input Frequency: 50 / 60 Hz
• Output Voltage: 9V AC (Alternating Current)
• Output Current: 1000mA (1.0A)
• Total Power: 9VA
• Connector Type: Barrel Plug (5.5mm x 2.1mm)