Safety Transformer Schneider Electric A9A15220 230/24V 40VA iTR

Schneider Electric safety transformer A9A15220 converts mains voltage of 230 V to a safe secondary voltage of 24 V with a rated output of 40 VA and provides galvanic isolation between primary and secondary circuits. The unit is built for fixed installation in control cabinets and electrical panels where low-voltage supplies are required for control devices, field sensors, thermostats, small lighting loads and similar equipment. The iTR design focuses on safe, compact voltage conversion and isolation in building and industrial electrical systems.

Advantages

This Schneider Electric safety transformer delivers a stable 24 V output from a 230 V supply while maintaining separation between primary and secondary circuits to reduce risk of electric shock and interference. Its 40 VA rating covers a range of low-power control and signaling loads. The compact, panel-mountable format simplifies integration into control cabinets and distribution boards. Built to industry standards for safety transformers, it supports reliable operation in continuous service for control and lighting applications.

Suitable for

• Supplying thermostats, sensors and control devices requiring 24 V AC or DC in building automation
• Powering low-voltage lighting circuits and signal lamps in control panels
• Providing isolated 24 V power for PLC inputs/outputs and relay coils in industrial panels
• Use in service panels and junction boxes where galvanic isolation is needed for safety

When it may not be suitable

The 40 VA output limits use to low-power loads; applications requiring higher continuous power or large lighting banks will need a higher-rated transformer. This model is intended for fixed installation and may not be suitable where portable, weatherproof, or field-service transformers are required. It is not a converter for DC-only heavy loads or for direct replacement of autotransformers that do not provide galvanic isolation.

Key specifications

• Primary voltage: 230 V
• Secondary voltage: 24 V
• Rated output power: 40 VA
• Type: safety/isolating transformer with galvanic isolation
• Mounting: panel/control cabinet fixed installation
• Intended use: low-voltage control and signaling circuits

How to use

Install the transformer in a dry, ventilated control cabinet or distribution board following local electrical codes. Connect the primary 230 V supply to the designated input terminals and route the secondary 24 V output to the low-voltage devices, ensuring correct polarity where applicable. Verify secure terminal connections and appropriate protection (fuses or circuit breakers) on the primary and secondary sides according to the connected load. After installation, measure voltages and confirm isolation before energizing downstream equipment.

What to consider before purchase

• Confirm that 40 VA output meets the total power demand of all connected devices
• Ensure required secondary voltage (24 V) and type (AC or DC as used by the load) are compatible
• Check space and mounting requirements for cabinet or DIN-rail integration
• Plan for appropriate primary and secondary protection devices and wiring sizes

Usage recommendations

Use this Schneider Electric 230/24 V 40 VA safety transformer for isolated low-voltage supplies in control panels and building automation. Maintain correct protective devices on both primary and secondary sides and avoid overloading the 40 VA rating to ensure long-term reliable operation.