Transformer 9-0-9V 15VA

The Transformer 9-0-9V 15VA is a mains step-down transformer with a centre-tapped 9-0-9 V secondary and a power rating of 15 VA. The centre tap lets you build a full-wave rectifier with just two diodes or a split positive and negative supply, while the full winding gives 18 V AC. It is a common choice for small DC power supplies, preamplifiers and audio projects.

Transformer 9-0-9V 15VA Specifications

• Secondary: 9-0-9 V AC, centre-tapped (18 V across the full winding)
• Power rating: 15 VA
• Secondary current: about 0.8 A across the full 18 V winding (15 VA ÷ 18 V)
• Primary: mains AC input (check the label for the rated voltage)
• Type: step-down transformer with separate primary and secondary windings

Transformer 9-0-9V 15VA Applications

• Full-wave rectified DC power supplies using two diodes
• Split DC supplies for op-amps and audio preamps
• Small amplifiers and audio projects
• Battery chargers and bench supply projects
• Electronics teaching labs

What's in the Box

• 1 × 9-0-9 V 15 VA transformer

Tip: The primary connects to mains voltage, so insulate all primary terminals, add a fuse and only work on it with the power unplugged. After rectifying and smoothing, the DC output is about 1.4 times the AC voltage, so expect around 12 V DC from each 9 V half at light load.

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