Single-phase transformer TMM 400VA 400/230V IP00, separating or safety transformer with two-chamber frame 16252-9996

Isolation and Safety Transformers for Industrial and Power Applications

This single-phase TMM transformer with a power rating of 400VA is a reliable solution for protecting and adapting voltage across a wide range of applications. Designed for both industrial and power applications, it ensures safe and efficient operation of equipment. The transformer’s design allows for integration into existing systems, while its open construction facilitates easy installation and servicing.

The TMM 400/A transformer features a primary voltage of 400V and a secondary voltage of 230V, making it ideal for powering devices requiring voltage reduction. As an isolation transformer, it effectively separates circuits, minimizing the risk of electric shock and interference. The IP00 protection rating indicates no protection against solid objects or water—therefore, the transformer is intended for use in dry, enclosed environments.

• Galvanic isolation: Ensures circuit separation, enhancing operational safety and protecting against interference.
• 400VA power rating: Suitable for a broad spectrum of applications, from powering controllers to small machinery.
• 400/230V voltages: Compatible with standard electrical installations.
• Open construction: Simplifies installation, access to components, and potential repairs.
• Insulation class B: Guarantees reliable operation at ambient temperatures up to 40°C.

Construction and Applications

The transformer is manufactured in accordance with EN 61558-2-4 and EN 61558-2-6 standards, confirming compliance with European safety and quality regulations. Its design is based on an EI core (non-toroidal), and the two-chamber bobbin further enhances mechanical strength. This ensures resistance to damage and long-term operational reliability.

Applications for the TMM transformer include:

• Powering control devices: PLCs, regulators, sensors.
• Circuit isolation: Protection against electromagnetic interference and electric shock.
• Voltage adaptation: Reducing mains voltage to meet device requirements.
• Industrial installations: Powering machinery and production equipment.
• Building automation systems: Powering components of smart home systems.

Transformer dimensions: 120 x 120 x 143 mm (width x depth x height), enabling easy fitting into available mounting space. The insulation material class is B, indicating resistance to temperatures up to 130°C—critical under intensive operation. The absence of PCB mounting capability indicates that the transformer is designed for traditional mounting, e.g., on a DIN rail or within an enclosure.