Audioblock ST 500/4/23 Control Transformer Isolation Transformer 500 VA 400V-230V

The Audioblock ST 500/4/23 is a high-quality control and isolation transformer designed for industrial applications requiring reliable voltage transformation. With a power rating of 500 VA, it converts a primary voltage of 400 V AC to a secondary voltage of 230 V AC, ensuring stable operation for control circuits and sensitive equipment.

Advantages

This transformer offers excellent electrical isolation, protecting connected devices from power surges and noise. Its robust construction and high efficiency (>90%) ensure long service life and minimal energy loss. The compact design allows for easy screw mounting in control cabinets.

Suitable for

• Industrial control systems
• Machine tools and automation
• Isolation of sensitive electronics
• Lighting and HVAC controls

Key specifications

• Type: Control Transformer, Isolation Transformer
• Power Rating: 500 VA
• Primary Voltage: 400 V AC
• Secondary Voltage: 230 V AC
• Frequency: 50/60 Hz
• Number of Phases: 1 (Single-phase)
• Insulation Class: B
• Protection Class: IP00
• Ambient Temperature Range: -25 °C to +40 °C
• Standards: EN 61558-2-2, EN 61558-2-4
• Short-Circuit Proof: Conditionally short-circuit proof (requires external fuse)
• Mounting Type: Screw mounting
• Terminals: Screw terminals
• Dielectric Strength: 4 kV
• Cooling: Air-cooled
• Efficiency: >90%

Recommendations

For optimal performance, install the transformer in a well-ventilated area and ensure proper fuse protection on the primary side. Suitable for use in industrial environments with ambient temperatures up to 40°C.