{"product_id":"18-0-18-stepdown-transformer-3a","title":"18-0-18 Stepdown Transformer 3A","description":"\u003ch1\u003e18-0-18 Stepdown Transformer 3A\u003c\/h1\u003e\n\nThe 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.\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePrimary Voltage: 230V AC (50\/60 Hz)\u003c\/li\u003e\n\u003cli\u003eSecondary Voltage: 18-0-18V AC (center-tapped)\u003c\/li\u003e\n\u003cli\u003eCurrent Rating: 3 Amperes\u003c\/li\u003e\n\u003cli\u003ePower Rating: 108 VA\u003c\/li\u003e\n\u003cli\u003eType: Step-down, center-tapped\u003c\/li\u003e\n\u003cli\u003eMounting: Vertical chassis mount with mounting bracket\u003c\/li\u003e\n\u003cli\u003eDimensions: Approx. 85mm x 70mm x 60mm\u003c\/li\u003e\n\u003cli\u003eWeight: Approx. 1.2 kg\u003c\/li\u003e\n\u003cli\u003eLead Wires: 6-inch color-coded input and output wires\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible with\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eArduino and Arduino-compatible boards (via regulated DC supply)\u003c\/li\u003e\n\u003cli\u003eESP32 and ESP8266 modules (with rectifier and regulator circuit)\u003c\/li\u003e\n\u003cli\u003eRaspberry Pi (with appropriate voltage regulation)\u003c\/li\u003e\n\u003cli\u003eSTM32 development boards\u003c\/li\u003e\n\u003cli\u003eGeneral-purpose breadboard and stripboard circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat you can build with it\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDual-rail ±18V DC power supply for audio preamplifiers and op-amp circuits\u003c\/li\u003e\n\u003cli\u003e12V or 5V regulated bench power supply for prototyping\u003c\/li\u003e\n\u003cli\u003eBattery charger for 12V lead-acid or 18V lithium-ion battery packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery 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.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the output voltage of this transformer?\u003c\/summary\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat payment options are available for the 18-0-18 Stepdown Transformer 3A?\u003c\/summary\u003e\n\u003cp\u003eYou can pay using UPI, debit\/credit cards, or Cash on Delivery (COD). All payment methods are available across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow long does delivery take and where do you ship?\u003c\/summary\u003e\n\u003cp\u003eWe 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.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"18-0-18 Stepdown Transformer 3A\",\n  \"description\": \"Center-tapped stepdown transformer converting 230V AC to 18-0-18V AC at 3A, ideal for power supplies and audio amplifiers.\",\n  \"sku\": \"TR-18-0-18-3A\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Generic\"\n  },\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"price\": \"1195.68\",\n    \"priceCurrency\": \"INR\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"url\": \"https:\/\/compoden.in\/products\/18-0-18-stepdown-transformer-3a\"\n  },\n  \"author\": {\n    \"@type\": \"Organization\",\n    \"name\": \"Compoden\"\n  },\n  \"mainEntityOfPage\": {\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n      {\n        \"@type\": \"Question\",\n        \"name\": \"What is the output voltage of this transformer?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"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.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"What payment options are available for the 18-0-18 Stepdown Transformer 3A?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"You can pay using UPI, debit\/credit cards, or Cash on Delivery (COD). All payment methods are available across India.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"How long does delivery take and where do you ship?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"We ship the 18-0-18 Stepdown Transformer 3A across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. 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