• Specification label of BSYF120300B W switching power supply showing CE and GS safety marks.
  • Black 12V 3A power adapter with UK 3-pin plug and cable attached.
  • Close-up of 5.5mm x 2.1mm DC barrel connector tip for 12V electronics.
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12V 3A AC/DC Power Adapter (UK Plug) | 5.5mm x 2.1mm

12V 3A AC/DC Power Adapter (UK Plug) | 5.5mm x 2.1mm

HK$88.00
HK$88.00
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Short Product Description

Upgrade your interface with crisp visuals.
This 12864 Graphic LCD Module delivers a sharp 128x64 pixel resolution on a stunning blue backlight with white pixels. Built with the versatile ST7920 controller, it supports both Parallel and SPI Serial modes, allowing you to save precious I/O pins on your Arduino or microcontroller. Perfect for displaying complex graphics, charts, and custom text.

Key Features

  • High-Res Graphic Display: 128x64 dot matrix resolution enables text, images, and graph rendering.
  • Crisp Visibility: Deep blue background with bright white pixels provides excellent contrast and aesthetics.
  • Dual Interface Modes: Supports both 6800 8-bit Parallel and Serial (SPI) modes (Selectable via Pin 15 PSB).
  • Standard 5V Logic: Seamlessly compatible with Arduino UNO, Mega, and other 5V logic controllers.
  • Adjustable Contrast: Dedicated V0 pin allows for precise brightness and contrast tuning via potentiometer.
  • Robust Mounting: Four corner mounting holes (3mm) for secure installation in enclosures.

Full Product Description

Is your device flickering, restarting, or dead due to a faulty power brick?

Power delivery is the heartbeat of your electronics. A cheap, unregulated adapter can damage sensitive components in your routers, surveillance systems, or hard drive enclosures.

Introducing the BSY Switching Power Supply (Model: BSYF120300B W). Engineered for reliability, this adapter converts standard wall outlet power (100-240V) into a clean, stable 12V DC output. With a robust 3.0 Amp (36W) capacity, it provides ample headroom for devices requiring 1A, 2A, or up to 3A, ensuring they run cooler and longer.

 

Why choose this adapter?

Unlike generic unbranded units, this BSY adapter carries legitimate safety certifications (GS, TUV, CE), ensuring protection against over-voltage and short circuits. It features a standard 5.5mm x 2.1mm barrel jack, the most common connector size for modern electronics.

Perfect for:

  • Security: CCTV Cameras and DVRs.
  • Lighting: 12V LED Strip Lights.
  • Networking: Wireless Routers and Modems.
  • Entertainment: TV Boxes and Audio Amplifiers.

Technical Specifications

  • Brand: BSY
  • Model: BSYF120300B W
  • Type: Switching Power Supply
  • Input Voltage: 100–240V AC, 50/60Hz, 1.0A
  • Output Voltage: 12V DC (Constant Voltage)
  • Output Current: 3.0A (Max 36W)
  • Plug Type: UK Standard (Type G), 3-pin
  • Connector Size: 5.5mm (outer) × 2.1mm (inner)
  • Polarity: Center Positive (+)
  • Certifications: CE, GS, TUV, RoHS

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

Q: My device says it needs 12V 2A. Can I use this 12V 3A adapter?
A: Yes! This is perfectly safe. The adapter supplies up to 3 Amps. Your device will only "pull" the 2 Amps it needs. Using a higher amperage adapter often allows it to run cooler.

Q: How do I know if the connector size fits?
A: This adapter uses a 5.5mm x 2.1mm tip. This is the industry standard. You can measure the diameter of your device's port or check your old adapter. Note: It will not fit 2.5mm internal pin devices.

Q: Is this suitable for outdoor use?
A: This is designed for indoor use only. It is not waterproof. If using it for outdoor CCTV, ensure the connection is housed in a waterproof junction box.

Target Users / Applications

  • Homeowners replacing router/modem power supplies.
  • DIY enthusiasts installing LED cabinet lighting.
  • Small business owners maintaining CCTV security systems.
  • IT professionals setting up external hard drive docks.
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