Why Choose the ETE SV50P5S4 50 VA Single-Voltage Control Transformer?
The ETE SV50P5S4 is a compact 50 VA single-phase single-voltage control transformer designed to provide a nominal 110 V AC secondary output from a 415 V AC primary supply. Part of the ETE SV single-voltage control transformer range, it offers a straightforward voltage transformation solution for industrial control panels, machinery control circuits and compatible auxiliary electrical equipment.
Featuring primary terminals marked 0/415V and secondary terminals marked 0/110V, the SV50P5S4 is intended for applications where a defined 415 V AC input must be transformed to a lower 110 V AC control voltage. Its 50 VA rated apparent power makes it suitable for appropriately sized control loads, including compatible relays, contactor coils, indication equipment and other industrial AC control devices. The specified 15% voltage regulation is an important consideration when assessing secondary voltage variation under different loading conditions.
With dimensions of just 75 × 65 × 88 mm and a weight of 1 kg, the ETE SV50P5S4 provides a space-conscious solution for industrial electrical assemblies. It features Class E insulation and is associated with the enclosure references EPH 1 or EPN 1, as listed in the ETE Stock Control Transformer Range, March 2026. Its combination of compact construction, defined primary and secondary voltages and practical control power capacity makes it a useful choice for new panel builds, equipment maintenance and compatible transformer replacement projects.
Key Advantages
- 50 VA rated apparent power for appropriately sized industrial control circuits.
- 415 V AC nominal primary input for compatible industrial electrical supplies.
- 110 V AC nominal secondary output for suitable control and auxiliary equipment.
- Single-voltage design with clearly defined primary and secondary terminal arrangements.
- Single-phase construction for compatible AC electrical systems.
- Compact dimensions of 75 × 65 × 88 mm for space-conscious panel design.
- 1 kg weight for practical handling during electrical assembly and maintenance.
- Class E insulation as specified in the ETE transformer range.
- 15% voltage regulation stated for informed load and voltage selection.
- EPH 1 or EPN 1 enclosure references for matching the transformer to compatible enclosure arrangements.
- Provides electrical isolation between the primary and secondary transformer circuits.
- Suitable for compatible industrial relay, switching and signalling applications.
- Useful for new industrial control panel builds and appropriately matched replacement installations.
Key Features
- ETE SV single-voltage control transformer series.
- Model reference: SV50P5S4.
- Single-phase transformer configuration.
- Rated apparent power: 50 VA.
- Primary terminal markings: 0/415V.
- Nominal primary voltage: 415 V AC.
- Secondary terminal markings: 0/110V.
- Output connection: 110 V AC.
- Insulation class: E.
- Voltage regulation: 15%.
- Enclosure reference: EPH 1 or EPN 1.
- Length: 75 mm.
- Width: 65 mm.
- Height: 88 mm.
- Weight: 1 kg.
- Suitable for compatible industrial AC control and auxiliary circuits.
- Listed in the ETE Stock Control Transformer Range, March 2026.
The ETE SV50P5S4 is designed for industrial applications requiring a 110 V AC control supply derived from a nominal 415 V AC input. Its primary terminal arrangement is marked 0/415V, while the secondary is marked 0/110V. This fixed nominal voltage arrangement is particularly useful when the available supply and required control voltage are already established during electrical system design.
As a single-voltage control transformer, the SV50P5S4 should be selected for the specified primary and secondary connections rather than assumed to offer alternative voltage taps. The primary voltage must be compatible with the installation, and the connected secondary equipment must be suitable for the transformer's nominal 110 V AC output. The transformer provides galvanic isolation between its primary and secondary circuits, but its specification does not establish a particular Class II protection classification, SELV output classification or other unlisted safety approval.
The transformer's 50 VA rating is the key starting point when assessing load suitability. At a nominal secondary voltage of 110 V, dividing 50 VA by 110 V gives approximately 0.45 A. This is a theoretical apparent-power sizing reference, not a separately published manufacturer current rating. The combined steady-state demand of connected equipment must be assessed, together with any relevant starting or inrush requirements, before selecting the transformer.
The specified 15% voltage regulation is particularly relevant to control circuit design. Transformer voltage regulation describes the change in secondary voltage between specified loading conditions, commonly expressed relative to the rated-load secondary voltage. It does not mean the transformer actively stabilises its output to within ±15%. Engineers should therefore consider how the secondary voltage may vary with loading and verify that connected control components can operate correctly throughout the expected conditions.
With Class E insulation, a 75 × 65 × 88 mm physical size and a 1 kg weight, the SV50P5S4 is well suited to consideration in compact control panel layouts. The catalogue identifies EPH 1 or EPN 1 as enclosure references; the appropriate arrangement and any associated installation requirements should be confirmed against ETE documentation. These references must not be treated as independently verified ingress protection ratings.
Installation and commissioning should be performed by suitably qualified personnel. The installation must incorporate appropriate primary and secondary circuit protection, conductor sizing, mechanical support, ventilation and electrical clearances. The transformer should be installed in accordance with ETE's instructions and applicable electrical requirements, with particular attention to supply voltage, connected load and the protection needs of the complete control circuit.
Typical Applications
- 110 V AC industrial control circuits.
- 415 V to 110 V AC control voltage transformation.
- Industrial electrical control panels.
- Compatible 110 V AC relay circuits.
- Appropriately sized 110 V AC contactor coils.
- Small motor starter control circuits.
- Industrial switching and control equipment.
- Compatible AC signalling and indication circuits.
- OEM machinery control systems.
- Packaging and processing machinery.
- Conveyor and material handling control equipment.
- Industrial automation auxiliary circuits.
- Electrical panel manufacturing and refurbishment.
- Maintenance of compatible 110 V AC control systems.
- Replacement of transformers with matching electrical and mechanical requirements.
- Industrial applications requiring a nominal 50 VA, 110 V AC transformer supply.
