Transformer 0-18V 3A 54VA

The Transformer 0-18V 3A 54VA is a step-down transformer with an 18 V AC secondary rated at 3 A, giving 54 VA of power. It is a solid base for linear bench power supplies, audio amplifiers and battery chargers: add a bridge rectifier and a large filter capacitor to turn its output into DC, then a regulator for a stable voltage.

Transformer 0-18V 3A 54VA Specifications

• Output (secondary): 18 V AC between the 0 V and 18 V terminals
• Output current: 3 A
• Power rating: 54 VA
• Input (primary): mains AC; check the label for the rated input voltage
• Type: step-down mains transformer
• DC after rectifying: roughly 23–25 V with a bridge rectifier and smoothing capacitor at light load

Transformer 0-18V 3A 54VA Applications

• Adjustable bench power supplies with an LM317 or similar regulator
• Audio amplifier power supplies
• Battery chargers with a suitable regulator
• Powering motors, LED strips and 12–15 V equipment through a regulator
• Lab, school and repair projects

What's in the Box

• 1 × transformer 0-18 V, 3 A, 54 VA

Tip: The primary connects to mains voltage, so insulate all terminals, fit a fuse on the primary side and only work on it with the power off. At currents near 3 A, use a bridge rectifier rated for at least 6 A and put linear regulators on a good heatsink.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.