Step-Down Transformer 220VAC to 3.3VAC 300mA

Description

220VAC to 3.3VAC Step-Down Transformer The 220VAC to 3.3VAC Step-Down Transformer reduces mains voltage to a low-voltage AC output. Its primary winding accepts approximately 220VAC. Meanwhile, the secondary winding provides 3.3VAC at a maximum rated current of 300mA. The transformer has an approximate apparent-power rating of 0.99VA , which is commonly rounded to 1VA. Therefore, it suits low-power electronic circuits that require a small isolated AC supply. This component provides electrical isolation between its primary and secondary windings. However, correct installation and insulation remain essential because the primary side connects directly to hazardous mains voltage. 3.3VAC 300mA Transformer Output The secondary output provides 3.3 volts AC , not regulated 3.3 volts DC. Consequently, circuits that require DC power need an additional rectifier, smoothing capacitor and voltage-regulation stage. The final DC voltage depends on the rectifier type, diode voltage drop, capacitor value and connected load. Therefore, designers should test the complete power-supply circuit before connecting sensitive electronic components. Key Features Input voltage: 220VAC Output voltage: 3.3VAC Maximum output current: 300mA Approximate power rating: 0.99VA / 1VA Step-down transformer operation Isolated primary and secondary windings Compact design for low-power circuits Suitable for custom power-supply projects AC output for rectification or direct AC loads Applications The 220VAC to 3.3VAC Step-Down Transformer can power low-voltage AC circuits, control boards and small indicators. Additionally, it can form the first stage of a low-current DC power supply when used with suitable rectification and regulation components. It also suits maintenance, prototyping and educational power-supply projects. Nevertheless, only trained users should work with the primary side. For safe installation, add a correctly rated fuse to the mains input. Moreover, cover all exposed primary terminals with suitable insulation. Always disconnect the power before touching, wiring or modifying the circuit.

From the supplier's page.