9V 1A AC-DC Power Supply Adapter – 9W Regulated, 100-240V Input, 5.5 × 2.1 mm Plug

The AC-DC 9V 1A is a regulated wall-mount switching power adapter that converts 100–240V AC mains power into a stable 9V DC output at up to 1A, for a maximum power rating of 9W. It uses a switching regulation design rather than a linear transformer, which keeps the housing compact and reduces no-load power consumption to less than 0.1W in comparable units. The output is delivered through a standard 5.5 × 2.1 mm center-positive barrel plug on a cable of approximately 1.2–1.5 m, making it compatible with a very wide range of consumer electronics, networking equipment, audio devices, and DIY projects that require a 9V supply. Built-in short-circuit and overload protection help safeguard both the adapter and the connected device, and the stabilised output with low ripple supports sensitive electronics.

The 9V 1A power adapter is available in wall-plug form factors with either a fixed or interchangeable AC plug, depending on the regional variant. Typical uses include powering routers, modems, IP cameras, Arduino and microcontroller projects, effects pedals, LED controllers, and small audio devices. This 9V 1A regulated adapter is a practical replacement or spare unit for any device rated up to 1A at 9V DC.

1. Powering routers, modems, and small network appliances.
2. IP cameras and basic surveillance equipment.
3. Arduino, ESP32, and other microcontroller development boards.
4. Guitar effects pedals and small audio devices.
5. LED strip controllers and low-voltage lighting.
6. Bench testing and replacement power for 9V electronics up to 1A.

1. Model: AC-DC 9V 1A (generic designation).
2. Product type: wall-mount switching power adapter.
3. Input voltage: 100–240V AC.
4. Input frequency: 50/60 Hz.
5. Output voltage: 9V DC regulated.
6. Maximum output current: 1A.
7. Maximum output power: 9W.
8. Output connector: 5.5 × 2.1 mm barrel plug, center-positive.
9. Cable length: approximately 1.2–1.5 m (varies by variant).
10. Protection: short-circuit and overload protection.
11. No-load power consumption: <0.1W (comparable units).
12. Output voltage tolerance: ±10% (comparable units).
13. Operating temperature: -30°C to +50°C (comparable units).
14. Dimensions: varies by housing style; typical compact wall-plug form factor (e.g., approximately 56 × 40 × 24 mm without AC pins on comparable units).