MW Power EB0909 plug-in switching power supply, 9 V, 1 A, 9 W, DC 5.5 × 2.1 mm

The MW Power EB0909 is a plug-in switching AC/DC power adapter designed for electronic devices requiring a 9 V DC supply and a current of up to 1 A. It plugs directly into a mains socket and supplies power through a 5.5 × 2.1 mm DC barrel connector with centre-positive polarity. Its wide input voltage range, low no-load power consumption and integrated electrical and thermal protection make it suitable for powering compatible low-power electronic equipment.

Key specifications: 9 V DC • 1 A • 9 W • 90–264 V AC • 5.5 × 2.1 mm DC plug • centre-positive

Key features

• Regulated 9 V output – provides a constant-voltage DC supply for compatible electronic equipment.
• Wide 90–264 V AC input range – supports operation from different mains voltage systems, provided a suitable socket is available.
• 9 W rated output power – delivers up to 1 A to electronic devices with compatible power requirements.
• Low no-load power consumption – a maximum of 0.075 W reduces energy consumption when no output load is connected.
• Level VI energy efficiency – the manufacturer specifies compliance with ErP Step II and CEC Level VI requirements. Typical efficiency is 83%.
• Integrated protection – overload, short-circuit and overtemperature protection help protect the adapter under abnormal operating conditions. Normal operation resumes automatically once the fault condition is removed.
• Class II protection – double or reinforced insulation provides protection against electric shock without requiring a protective earth connection.

Applications

The EB0909 is intended for household and general-purpose electronic equipment that requires a regulated 9 V DC supply and draws no more than 1 A.

It can be used for powering electronic devices, servicing and repair work, or as a replacement power adapter when all electrical and mechanical connection requirements match those of the equipment being powered.

Compatibility and limitations

• Suitable for devices requiring 9 V DC and drawing no more than 1 A.
• Equipped with a 5.5 × 2.1 mm DC barrel plug with centre-positive polarity.
• Fixed 9 V DC output; the output voltage is not adjustable.
• Not suitable for equipment requiring a different supply voltage, reverse polarity or an operating current exceeding 1 A.
• Verify the device's voltage, current, connector dimensions and polarity before connection.

Technical specifications

Parameter	Specification
Manufacturer	MW Power
Model	EB0909
Product type	Plug-in switching AC/DC power supply
Rated output voltage	9 V DC
Rated output current	1 A
Output current range	0–1 A
Rated output power	9 W
Input voltage range	90–264 V AC
Input frequency range	47–63 Hz
Line regulation	±1%
Load regulation	±5%
Overall output voltage tolerance	±8%
Output ripple and noise	250 mV p-p max.
Setup time	1000 ms at 230 V AC, full load
Rise time	50 ms at 230 V AC, full load
Typical hold-up time	50 ms at 230 V AC, full load
Typical efficiency	83%
Typical AC input current	0.22 A at 115 V AC; 0.12 A at 230 V AC
No-load power consumption	0.075 W max.
Overload protection	Operating threshold: 140–180% of rated load
Short-circuit protection	Cyclic output shutdown and restart
Overtemperature protection	Internal trip temperature: 140 ±10 °C
Protection recovery	Automatic after fault removal
Electrical protection class	Class II
DC output connector	5.5 × 2.1 mm barrel plug
Output polarity	Centre-positive (+)
Output cable	2-core, 22 AWG
Operating temperature	0–40 °C
Operating relative humidity	10–90%, non-condensing
Storage temperature	−20 to +85 °C
Storage relative humidity	5–90%, non-condensing
Input-to-output dielectric withstand voltage	3.6 kV AC
Input-to-output insulation resistance	50 MΩ at 500 V DC, 25 °C and 70% RH
Energy efficiency requirements	ErP Step II / CEC Level VI
Safety standard specified in manufacturer documentation	EN 60950-1
EMC emissions standard	EN 55032
EMC immunity standards	EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5
Other specified EMC standards	EN 61000-3-2, EN 61000-3-3
Dimensions (L × W × H)	67 × 42.5 × 74 mm
Net weight	75 g

Test conditions: unless otherwise specified, the manufacturer's electrical specifications are measured at 230 V AC input, rated load and an ambient temperature of 25 °C. Ripple and noise are measured over a 20 MHz bandwidth using parallel-connected 0.1 µF and 47 µF capacitors.

Design and operation

The adapter features an integrated mains plug and an attached output cable with a DC barrel connector. Its fixed 9 V output allows compatible devices to be connected without additional voltage adjustment.

Important operating and safety notes

• Use the adapter only within the specified operating temperature and humidity ranges.
• Protect it from water, condensation and conditions that could cause overheating.
• Do not exceed the rated output current of 1 A or the rated output power of 9 W.
• The 140 ±10 °C rating refers to the internal thermal protection trip temperature, not the permissible ambient operating temperature.
• An incorrect supply voltage or connector polarity may damage the connected device.

Package contents

• 1 × MW Power EB0909 power adapter with integrated mains plug and attached DC output cable.