Single-phase transformer STM 400VA 230/24V IP00 isolation or safety transformer with single-chamber housing 16224-9918

Safety and Isolation Transformer STM 400VA

This single-phase STM transformer with a power of 400VA and a voltage of 230/24V is a reliable solution for protecting devices and electrical installations. Its construction, with a single-chamber housing, provides additional mechanical protection and facilitates mounting. Designed for both industrial and residential applications, it meets safety requirements.

Features and Application

The STM transformer is primarily a safety transformer, which means it is designed to minimize the risk of electric shock. Additionally, although it is not a fully isolating transformer, it provides some galvanic isolation between the primary and secondary circuits. It is ideal for powering devices requiring reduced voltage, such as controllers, low-voltage lighting or automation systems. Thanks to its compact dimensions (120 x 103 x 125 mm), it can be easily integrated with various devices and installations.

• Application: Powering control devices, low-voltage lighting, automation systems, laboratory equipment.

• Safety: Provides protection against electric shock thanks to the safety transformer design.

• Robustness: Made of high-quality materials, resistant to environmental conditions.

• Mounting: Single-chamber housing facilitates mounting and provides additional mechanical protection.

• Insulation class B: Guarantees safe operation at ambient temperature up to 40°C.

Technical Parameters and Compliance with Standards

The STM transformer complies with EN 61558-2-4 and EN 61558-2-6 standards, confirming its compliance with European safety and quality standards. Its insulation material class is B (130°C), which ensures long-lasting and reliable operation even at elevated temperatures. The degree of protection IP00 means there is no protection against the ingress of solids or liquids – therefore, the transformer should be mounted in a dry and well-ventilated place. The primary voltage is 230V, and the secondary voltage is 24V, making it a universal solution for many applications. The rated apparent power is 400VA – an important parameter when selecting a transformer for a specific load. The width of the device is 120 mm, the height is 103 mm and the depth is 125 mm.

This transformer does not have an autotransformer function or a toroidal core. It is also not a fully isolating transformer – its main function is to ensure safety by limiting the output voltage. Lack of short-circuit resistance requires the use of additional protection in the electrical installation (e.g. fuses).