Single-phase transformer STM 250VA 230/24V IP00 isolation or safety transformer with single-chamber housing 16224-9920

Safety and Isolation Transformer – Reliable Protection and Power Supply

This single-phase STM transformer with a power of 250VA is a solid solution for applications requiring both galvanic isolation and protection against overload. Designed for mounting inside devices and industrial and electrical installations, it provides safe and stable power to secondary circuits. The transformer's construction is based on an open core, which affects its compact dimensions (96 x 100 x 114 mm) and facilitates integration with existing systems.

Construction and Application

The STM 250VA 230/24V transformer is an isolating device that effectively isolates the primary circuit (230V) from the secondary circuit (24V). This minimizes the risk of electric shock and protects sensitive devices from interference and overvoltages. Insulation class B (130°C) guarantees long-lasting and reliable operation even at elevated ambient temperatures (up to 40°C). It is an ideal choice for powering controllers, automation systems, low-voltage lighting and other devices requiring safe and stable 24V voltage.

• Safety first: The safety transformer protects users from electric shock, meeting the standards EN 61558-2-4 and EN 61558-2-6.
• Versatility: Suitable for a wide range of applications in industrial installations, public buildings and homes.
• Compact dimensions: Allow easy integration with existing systems without taking up much space.
• Durable construction: Construction in Class I insulation and high-quality materials ensure a long service life.
• Secondary voltage: Provides a stable 24V AC voltage, ideal for powering various electronic devices.

Technical parameters and mounting

The transformer is characterized by a rated power of 250 VA, which allows powering devices with a power consumption of up to this value. The degree of protection IP00 means there is no protection against the ingress of solids and water – therefore, the transformer is intended for mounting in dry and well-ventilated places. Mounting is simple and intuitive, and the open construction facilitates access to the terminals. Remember to select the correct cross-sections of the power supply cables and to protect the transformer against overload with an appropriate overcurrent circuit breaker.