Adapter 9V 2A with Single Jack 5.5×2.5mm
The Adapter 9V 2A with Single Jack (5.5×2.5 mm) is a compact AC-to-DC power supply that converts mains electricity into a stable 9 V DC output capable of delivering up to 2 A of current. This type of adapter is widely used for powering small to medium-sized electronic devices that require a regulated DC source within this voltage and current range. Typical input voltage compatibility ranges from 100 V to 240 V AC, allowing it to be used in most countries without the need for external voltage converters.
With its standard barrel connector size of 5.5 mm outer diameter and 2.5 mm inner diameter, this adapter fits a vast array of devices designed for DC barrel jack power input. The adapter usually features protections against common electrical faults such as short-circuit, over-current, and over-voltage, enhancing safety for both the adapter and the connected device. Its simple plug-and-use design makes it a go-to solution for hobbyists and professionals alike.
Thanks to its regulated output and efficient power conversion, the 9 V 2 A adapter reliably provides up to 18 W of DC power for devices that operate within that range. Its widespread compatibility with routers, CCTV cameras, LED lighting, set-top boxes, and development boards makes it a versatile component in everyday electronic setups.
Features:
- Universal AC input compatibility (100–240 V).
- Stable 9 V DC output with up to 2 A current.
- Standard 5.5×2.5 mm DC barrel jack connection.
- Built-in protections: over-load, over-voltage, short-circuit.
- Durable, compact design for everyday use.
Specifications:
| Specification | Detail |
|---|---|
| Input Voltage: | 100–240 VAC, 50/60 Hz |
| Output Voltage: | 9 VDC |
| Output Current: | 2 A |
| Output Power: | 18 W |
| Connector: | 5.5 × 2.5 mm barrel jack |
| Polarity: | Center positive |
| Protections: | Over-voltage / Over-current / Short-circuit |
Applications:
- Powering routers and modems.
- CCTV and security systems.
- LED lighting and display equipment.
- DIY electronics and development boards.
- Small appliances requiring 9 VDC.
Package Contents:
- 1x Adapter 9V 2A with Single Jack 5.5×2.5mm

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