Can I use this 24V 3A adapter for a device that only needs 1.5A?

Yes, it is completely safe to use a 3A adapter on a device that only requires 1.5A. Electronic devices only draw the current (Amps) they need to operate; the adapter will simply run cooler and more efficiently because it is not being pushed to its maximum 3A capacity.

What is the difference between a 5.5x2.1mm and a 5.5x2.5mm plug?

The difference lies in the inner diameter of the barrel plug. This adapter has a 2.1mm inner hole. If your device requires a 2.5mm inner pin, this 2.1mm plug will be too small and will not fit into the socket. You must verify your device's exact pin size before purchasing.

Why is my LED strip flickering when connected to this adapter?

If your 24V LED strip is flickering, it usually means the total wattage of the LED strip exceeds the 72W maximum output of this adapter. You must calculate the total power draw of your LED strip (Watts per meter multiplied by total length) to ensure it stays safely below 72W.

Does this adapter support the 220V power grid in Hong Kong?

Yes, this power adapter features a built-in UK 3-pin plug (Type G), which is the exact standard used for all wall outlets in Hong Kong. It supports a universal 100-240V AC input, making it perfectly compatible with the local 220V power grid without needing a transformer.

Is this power supply suitable for continuous 24/7 operation?

Yes, this CONZIE power supply is designed with Level VI energy efficiency and robust internal components, making it suitable for continuous 24/7 operation. However, to maximize its lifespan, we recommend keeping the continuous load around 80% (approx. 2.4A or 57W) of its maximum capacity.

24V 3A Power Adapter | 72W 5.5x2.1mm DC Plug

Name: 24V 3A Power Adapter | 72W 5.5x2.1mm DC Plug
Brand: Conzie
SKU: 21PA000370
Price: 416.0 TWD
Availability: InStock

Short Product Description

The CONZIE 24V 3A Power Adapter (HQ72C-2403000-AB) is a heavy-duty 72W replacement power supply featuring a standard UK 3-pin plug and a 5.5x2.1mm DC barrel connector. Designed to deliver stable, continuous power, this CE and UKCA-certified white adapter is the perfect solution for driving high-power 24V LED light strips, 3D printers, and industrial automation equipment. Available for instant pickup at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po, our technical staff can help you verify your device's voltage and barrel size requirements before you purchase.

Key Features

72W Power Output: Delivers a highly stable 24V DC at up to 3 Amps, providing sufficient wattage for 3D printers, CNC routers, and long LED strips.
5.5x2.1mm DC Plug: Features the industry-standard barrel connector size for secure, uninterrupted power delivery.
UK 3-Pin Standard: Comes with a built-in Type G plug, perfectly suited for standard wall sockets in Hong Kong and the UK.
Center-Positive Polarity: Wired with the industry-standard polarity configuration to ensure safe compatibility with most modern devices.
CE & UKCA Certified Safety: Manufactured to meet strict European and UK safety standards, protecting your equipment against over-voltage and short circuits.
Level VI Energy Efficiency: Advanced circuitry minimizes standby power consumption and reduces heat generation during continuous operation.

Full Product Description

Stable 24V Power for High-Demand Electronics

This CONZIE 24V 3A Power Adapter delivers a robust 72W of continuous power, making it the ideal replacement for heavy-duty electronics and LED lighting systems. It is engineered to replace lost or burnt-out power supplies for devices that require exactly 24 Volts of direct current (DC). By utilizing high-quality internal components and achieving Level VI energy efficiency, this adapter prevents voltage fluctuations that can cause 3D printer print failures or LED lighting to flicker.

Universal 5.5x2.1mm DC Connector

Equipped with the industry-standard 5.5x2.1mm DC barrel plug, this adapter ensures a secure and wobble-free connection for your devices. This specific barrel size (5.5mm outer diameter, 2.1mm inner diameter) is widely used in commercial lighting and motor-driven equipment, providing a snug fit that prevents accidental power loss. The integrated UK 3-pin plug allows you to connect it directly to standard wall outlets without needing bulky travel adapters, keeping your setup clean and professional.

Pro Tip from Our Technicians

Our Sham Shui Po technical team strongly advises checking your device's voltage and polarity symbols before plugging in this 24V Power Supply. This adapter is wired as "Center-Positive" (the inside of the barrel is positive, the outside is negative), which is standard for most electronics, but plugging a 24V adapter into a 12V device will cause catastrophic and permanent damage. Furthermore, while a 5.5x2.1mm plug cannot physically fit into a 5.5x2.5mm socket properly, forcing it may damage the internal pins; always ensure your device specifically requires a 2.1mm inner pin.

Technical Specifications

Brand: CONZIE
Model: HQ72C-2403000-AB
Product Type: AC to DC Switching Power Supply
Input Voltage: 100-240V AC, 50/60Hz 2.0A (Universal Input)
Output Voltage: 24.0V DC
Maximum Output Current: 3.0A (3000mA)
Maximum Power Output: 72.0W
DC Connector Size: 5.5mm (Outer Diameter) x 2.1mm (Inner Diameter)
Polarity: Center-Positive
AC Plug Type: UK 3-Pin (Type G)
Certifications: CE, UKCA, Efficiency Level VI

Delivery Options

Local delivery within Hong Kong and in-store pickup.
Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
In-store pickup details (location and time) will be confirmed by email or phone message.
Delivery times are estimates and may be affected by weather or unforeseen circumstances.

FAQ Section

Can I use this 24V 3A adapter for a device that only needs 1.5A?Yes, it is completely safe to use a 3A adapter on a device that only requires 1.5A. Electronic devices only draw the current (Amps) they need to operate; the adapter will simply run cooler and more efficiently because it is not being pushed to its maximum 3A capacity.
What is the difference between a 5.5x2.1mm and a 5.5x2.5mm plug?The difference lies in the inner diameter of the barrel plug. This adapter has a 2.1mm inner hole. If your device requires a 2.5mm inner pin, this 2.1mm plug will be too small and will not fit into the socket. You must verify your device's exact pin size before purchasing.
Why is my LED strip flickering when connected to this adapter?If your 24V LED strip is flickering, it usually means the total wattage of the LED strip exceeds the 72W maximum output of this adapter. You must calculate the total power draw of your LED strip (Watts per meter multiplied by total length) to ensure it stays safely below 72W.
Does this adapter support the 220V power grid in Hong Kong?Yes, this power adapter features a built-in UK 3-pin plug (Type G), which is the exact standard used for all wall outlets in Hong Kong. It supports a universal 100-240V AC input, making it perfectly compatible with the local 220V power grid without needing a transformer.
Is this power supply suitable for continuous 24/7 operation?Yes, this CONZIE power supply is designed with Level VI energy efficiency and robust internal components, making it suitable for continuous 24/7 operation. However, to maximize its lifespan, we recommend keeping the continuous load around 80% (approx. 2.4A or 57W) of its maximum capacity.

Target Users / Applications

3D Printing Enthusiasts: Replacing a burnt-out 24V power supply for desktop 3D printers to ensure stable heating for the hotend and print bed.
Commercial Lighting Installers: Providing continuous, flicker-free 24V power to long runs of architectural LED light strips in retail display cabinets.
DIY Automation Makers: Powering 24V DC motors, linear actuators, or water pumps in custom smart home or hydroponic setups.