Why Choose the ETE XMS300P4S4 Class II Enclosed Safety/Isolating Transformer?
The ETE XMS300P4S4 is a robust 300 VA single-phase Class II enclosed safety/isolating transformer designed to provide a dependable 110 V AC output from a nominal 240 V AC primary supply. Part of the ETE XMS stock control transformer range, it combines Class II electrical protection construction, an integral moulded housing and chassis mounting for integration into appropriately designed industrial electrical equipment.
The XMS300P4S4 features primary terminals marked 0/240V and secondary terminals marked 0/110V, providing a straightforward voltage transformation arrangement for compatible industrial control and auxiliary equipment. Its Class II construction uses a double-insulated or reinforced-insulated protection concept, while the integral moulded housing provides an enclosed transformer assembly. The XMS300P4S4 is specified for chassis mounting only, making its mounting requirements an important consideration during electrical panel design and transformer replacement.
With a rated apparent power of 300 VA, Class F insulation and dimensions of 126 × 136 × 127 mm, the ETE XMS300P4S4 offers substantial capacity for compatible 110 V AC control and auxiliary circuits. Weighing 5 kg, it is intended for secure installation onto a suitably supported chassis or mounting surface within industrial machinery, control panels and electrical assemblies.
Key Advantages
- 300 VA rated apparent power for compatible 110 V AC control and auxiliary circuits.
- Class II construction based on a double-insulated or reinforced-insulated protection concept.
- Enclosed safety/isolating transformer design for industrial electrical applications.
- 240 V AC nominal primary input for compatible electrical supplies.
- 110 V AC secondary output for suitable industrial control equipment.
- Integral moulded housing providing a self-contained enclosed transformer assembly.
- Chassis mounting for secure integration into suitably designed electrical equipment.
- Class F insulation for industrial transformer applications.
- Provides electrical isolation between primary and secondary circuits.
- 300 VA capacity for applications with substantial combined AC control power requirements.
- 126 × 136 × 127 mm dimensions for integration into appropriately designed electrical cabinets and machinery.
- 5 kg weight for suitably supported industrial installations.
- Suitable for compatible industrial control, switching and auxiliary AC equipment.
Key Features
- ETE XMS enclosed safety/isolating transformer series.
- Single-phase transformer construction.
- 300 VA total rated apparent power.
- Class II electrical protection construction.
- Primary terminal markings: 0/240V.
- Nominal primary voltage: 240 V AC.
- Secondary terminal markings: 0/110V.
- Nominal secondary output: 110 V AC.
- Insulation class: F.
- Enclosure: Integral moulded housing.
- Mounting method: Chassis mounting only.
- DIN rail mounting: Not specified for this model.
- Electrical isolation between primary and secondary circuits.
- Suitable for compatible industrial 110 V AC control applications.
- Dimensions: 126 × 136 × 127 mm.
- Weight: 5 kg.
- Included in the ETE Stock Control Transformer Range, March 2026.
The ETE XMS300P4S4 is designed for applications requiring a 110 V AC supply derived from a nominal 240 V AC input. Its primary terminals are marked 0/240V, while the secondary terminals are marked 0/110V. This straightforward input and output arrangement makes it suitable for compatible industrial control equipment, particularly where an available 240 V AC supply must be transformed to a lower AC control voltage.
A defining feature of the XMS300P4S4 is its Class II construction. Class II electrical equipment uses double or reinforced insulation as its protective measure, rather than relying on protective earthing of accessible conductive parts. This classification should not be confused with the transformer's separate Class F insulation specification, which describes the thermal classification of the insulation system. Both classifications are relevant to transformer selection but address different aspects of its electrical design.
The transformer features an integral moulded housing and is specified for chassis mounting only. This distinction is important when planning electrical cabinet layouts or replacing an existing transformer. The installation must provide a suitable chassis or mounting surface capable of supporting the transformer's 5 kg weight. DIN rail mounting is not an authorised mounting option in the supplied specification. The integral moulded housing is the stated enclosure reference; it does not independently establish an ingress protection rating or suitability for outdoor installation.
Its 300 VA rated apparent power provides capacity for one or more compatible 110 V AC loads, provided their combined operating and starting demands remain within the transformer's permitted limits. At a nominal 110 V output, 300 VA corresponds to approximately 2.73 A when calculated from apparent power divided by voltage. This is a theoretical sizing reference, not a separately stated manufacturer output current rating. Suitable load assessment should also consider any significant inrush current requirements of connected equipment.
Installation should be carried out by suitably qualified personnel in accordance with ETE's instructions and applicable electrical requirements. Appropriate primary and secondary circuit protection, conductor sizing, ventilation, chassis support and electrical clearances must be provided. The transformer's Class II protective construction must be preserved during installation, operation and maintenance.
Typical Applications
- 110 V AC industrial control circuits.
- 240 V to 110 V AC voltage transformation.
- Industrial electrical control panels and cabinets.
- Compatible 110 V AC relay and contactor control circuits.
- 110 V AC motor starter control systems.
- Industrial switching and auxiliary electrical equipment.
- Industrial signalling and indication circuits.
- OEM machinery and equipment assemblies.
- Chassis-mounted machinery control equipment.
- Packaging and processing machinery.
- Industrial automation control circuits.
- Conveyor and material handling equipment.
- Electrical panel manufacturing and refurbishment.
- Compatible transformer replacement and equipment maintenance projects.
- Applications requiring a Class II enclosed transformer with a nominal 110 V AC output.
- Control installations requiring a total transformer capacity of 300 VA.
