Transformers for printed circuits

Production of transformers for printed circuits

Single-phase transformers for printed circuits are electrical transformers that operate in alternating current and are utilised to transfer electrical power from one voltage level to another. The transformers are comprised of a magnetic core and at least two electric coils. The coils are classified according to the number of turns, those with high voltage (HV) with a greater number of turns (with fewer sections) and those with low voltage (LV) with a lesser number of turns (with fewer sections).

The PCB transformers or transformers for printed circuits, be they painted transformers or resin transformers, are utilised in all electrical boards and electronics having the need to vary the input voltage in comparison to the output, galvanically separating the circuit.

The painted transformers are impregnated by means of special self-extinguishing paint to protect them both mechanically (from rust, vibrations, etc.) and electrically (the paint acts as an insulator, thus reinforcing the isolation of transformer itself).


The resin transformers are incorporated inside a container with self-extinguishing epoxy resin. The transformers are thus completed having an IP66 degree of protection, which renders them suitable for use also in humid environments or even having contact with water.

Such containers used for the resin-coated transformers can also have slots for fixing on the card or on the electrical panel, otherwise the transformers can be provided with terminals or with output cables, or alternatively with an input cable plug and output cable portion.


On request they can also be equipped with guide suitable for mounting on DIN OMEGA support (DIN RAIL).

S.V.T.I. transformers for printed circuits are designed and manufactured with high-quality materials, copper electrolytic conductor wire, insulators with elevated dielectric and thermal properties (classes F and H), robust and secure mechanical support elements suitable for any installation requirement.

S.V.T.I. three-phase transformers and three-phase autotransformers can be supplied complete with accessories and customised wiring, based on the specific needs of the end client.


Upon request, thermal protection against overheating may also be applied on the primary winding, heating that can be automatically or manually reset, depending on the required applications.

The quality of S.V.T.I. single-phase transformers and single-phase autotransformers is verified across various levels: each implementation phase is checked, from the initial winding to the final test of the transformer itself. Upon conclusion of production, each transformer is tested 100%. In this way, the electromagnetic performance and safety degree is certified for each transformer. The pre-testing and the final testing is carried out in accordance with applicable CEI EN 61558 - CEI 96.7 - 96.8 - CE regulations, according to the type of transformer and its utilisation.


The careful overseeing of production processes and customisation of testing with dedicated and specially-designed equipment guarantees maximum reliability for S.V.T.I. transformers.

Also to note is that the S.V.T.I. single-phase transformers and single-phase autotransformers are made with automated machinery to ensure maximum reliability and repeatability of the electric tolerance parameters.

S.V.T.I. designs and develops different types of transformers, projected and customised according to the needs of the end client by maximising performance and preventing any kind of problem. S.V.T.I. single-phase transformers and single-phase autotransformers cover a wide range of applications with dimensional and technical characteristics that stretch from standard to more complex customisation.

S.V.T.I. supports its clients throughout the design and customisation of the single-phase transformers and single-phase autotransformers, so as to guarantee the best results in economic and technical performance terms.


S.V.T.I. electrical transformers find their application in several sectors, such as that of control panels, home automation and, more generally, in all applications requiring a variation of voltage with respect to that with which these transformers are fed.
Precise and binding testing ensure a high degree of safety and reliability for each transformer produced, in accordance with applicable national and international regulations.


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