Transformer 220V 12V-0-12V 300mA
🛠️ Center-Tapped Step-Down Transformer – 220 V to 12–0–12 V AC, 300 mA
Overview
A compact center-tapped transformer that steps down 220 VAC mains to 12–0–12 VAC, rated at 300 mA (≈3.6 VA). Ideal for use in full-wave rectifier circuits, small power supplies, audio preamps, and low-current electronics.
Key Features
Input voltage: 220 V AC (50/60 Hz)
Output: 12 VAC–0–12 VAC (center-tapped)
Current rating: 300 mA continuous
Compact vertical/chassis mount format
High-efficiency copper windings
Technical Specifications
| Parameter | Value |
|---|---|
| Primary Voltage | 220 V AC at 50/60 Hz |
| Secondary Voltage | 12 V–0 V–12 V AC nominal |
| Current Rating | 300 mA (≈3.6 VA) |
| Power Rating | ≈3.6 VA |
| Core Material | Laminated silicon steel |
| Winding Material | Copper |
| Mounting | Chassis or PCB via mounting tabs |
| Insulation Class | Typically Class B (~130 °C) |
| Approx. Size & Weight | ~35–45 × 30 × 30 mm; ~150 g |
Typical Applications
Dual-voltage power supplies (e.g., ±12 V rails)
Small audio amplifiers and preamp circuits
Educational rectifier and smoothing circuit builds
Sensor modules and embedded electronics
Low-current AC-powered devices
Wiring & Usage
Primary: Connect 220 V AC to the two primary leads
Secondary:
Outer leads yield ~12 VAC each to center tap → 24 VAC total
Use full-wave center-tap rectifier (two diodes) for dual DC rails
Use both outer leads for single 24 VAC output (if needed)