Legrand Control Transformer 400VA 42426

Description

The Legrand 42426 is a high-quality single-phase safety and isolation transformer designed for industrial control applications. It reliably steps down primary voltages of 230V or 400V AC to a safe and stable 115V AC secondary output. With a power rating of 400VA, it is perfectly suited to power contactors, relays, PLCs, and other control circuit components, ensuring operational stability and electrical isolation. The unit is built for durability and features easy-to-access screw terminals and an integrated mounting bracket for quick installation in control cabinets.

Specifications

• Manufacturer: Legrand
• Model Number: 42426
• Power Rating: 400VA
• Primary Voltage: 230V / 400V AC (+/- 15V)
• Secondary Voltage: 115V AC
• Frequency: 50/60Hz
• Insulation Class: Class 105 (Class A)
• Phase: Single-phase

Label Info

• PRI: 230/400V +/- 15V
• SEC: 115V, 4A
• Standards: IEC/EN 61558-2-2, IEC/EN 61558-2-4

Application

Ideal for use in industrial automation panels, machine control circuits, and any application requiring a reliable, isolated 115V AC control voltage from a higher mains voltage.

Country of Origin

Manufactured by Legrand. While specific factory information is not on the label, Legrand is headquartered in France.

CO2 Impact

Opting for this pre-owned transformer saves an estimated 29 kg of CO2 compared to manufacturing a new one. This choice supports a circular economy and reduces industrial waste.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

The +/- 15V taps on the primary 230V/400V windings allow for fine-tuning the input voltage. This is useful in installations where the mains voltage may consistently be slightly higher or lower than the nominal value, ensuring the secondary output remains a stable 115V.

No, this is a safety and isolation transformer, but its secondary voltage of 115V is not within the SELV range (which is typically below 50V AC). It is designed to isolate control circuits from the main power line for safety, but not for direct contact applications requiring SELV.

The 'Class 105' refers to the transformer's thermal insulation class (Class A). It indicates that the insulating materials used in its construction are rated for a maximum operating temperature of 105 deg C. Exceeding this temperature can degrade the insulation and shorten the transformer's lifespan.

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Last Update: Friday, March 13, 2026