18-0-18 Stepdown Transformer 3A

The 18-0-18 Stepdown Transformer 3A is a center-tapped power transformer that converts 230V AC mains input to 18V AC output at each half of the secondary winding, delivering up to 3 amperes of current. It is designed for engineers and hobbyists building regulated power supplies, audio amplifiers, battery chargers, and lab equipment requiring a stable low-voltage AC source.

Specifications

• Primary Voltage: 230V AC (50/60 Hz)
• Secondary Voltage: 18-0-18V AC (center-tapped)
• Current Rating: 3 Amperes
• Power Rating: 108 VA
• Type: Step-down, center-tapped
• Mounting: Vertical chassis mount with mounting bracket
• Dimensions: Approx. 85mm x 70mm x 60mm
• Weight: Approx. 1.2 kg
• Lead Wires: 6-inch color-coded input and output wires

Compatible with

• Arduino and Arduino-compatible boards (via regulated DC supply)
• ESP32 and ESP8266 modules (with rectifier and regulator circuit)
• Raspberry Pi (with appropriate voltage regulation)
• STM32 development boards
• General-purpose breadboard and stripboard circuits

What you can build with it

• Dual-rail ±18V DC power supply for audio preamplifiers and op-amp circuits
• 12V or 5V regulated bench power supply for prototyping
• Battery charger for 12V lead-acid or 18V lithium-ion battery packs

Built and Backed by Compoden

Every 18-0-18 Stepdown Transformer 3A you buy from Compoden comes with free access to our AI build companion — delivered via QR code, email, or WhatsApp — that helps you wire and integrate this transformer into your project. With 10 years of experience supplying electronics to makers, schools, and engineering institutions across India, we ensure every component meets the needs of real-world builds. Pay your way: UPI, cards, or Cash on Delivery, anywhere in India.

Frequently Asked Questions

What is the output voltage of this transformer?

The secondary winding provides 18V AC between each outer terminal and the center tap, giving you 18-0-18V AC. The total voltage across the full winding is 36V AC.

What payment options are available for the 18-0-18 Stepdown Transformer 3A?

You can pay using UPI, debit/credit cards, or Cash on Delivery (COD). All payment methods are available across India.

How long does delivery take and where do you ship?

We ship the 18-0-18 Stepdown Transformer 3A across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Delivery typically takes 3–7 business days depending on your location.