Hager SFT140 1-pole, 40A Centre Off Modular Changeover Switch with Top Common Point

Description

Safe switching with total isolation.

The Hager SFT140 40A Centre Off Changeover Switch provides controlled switching between two power sources with a true OFF position. Designed for single-phase circuits, it prevents overlap between supplies, reducing risk to equipment and ensuring safer operation.

• Current Rating: 40A
• Poles: 1 Pole
• Switch Type: Centre Off (I-0-II)
• Mounting: DIN Rail (1 Module)
• Terminal Layout: Top Common Point
• Standard: IEC 60947-3
• Application: Source Changeover & Isolation

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Reliable Control Where It Counts

This 40A changeover switch is built for applications where switching between power sources must be controlled and deliberate. The Centre Off (I-0-II) function ensures the load is completely isolated before connecting to an alternate supply. This reduces the risk of backfeeding and protects connected equipment from electrical stress during switching.

Designed for Practical Installation

The Top Common Point configuration aligns with standard top-fed switchboards commonly used across Australia. This simplifies wiring layouts and helps minimise installation errors. Combined with its compact 1-module DIN rail design, the SFT140 is ideal for switchboards where space efficiency is critical.

Built for Demanding Environments

Engineered to meet IEC 60947-3, this switch is suitable for switching under load conditions and frequent operation. Its 40A capacity makes it a strong choice for higher-demand single-phase circuits where reliability and safety are essential.

Q: What is a Centre Off changeover switch used for?
A: It allows switching between two power sources while providing a true OFF position to fully isolate the load, improving safety during operation and maintenance.

Q: What does I-0-II mean on a changeover switch?
A: It represents three positions—Source 1 (I), Off (0), and Source 2 (II)—allowing safe switching with a neutral isolation point.

Q: Is the Hager SFT140 suitable for generator changeover?
A: Yes, it is commonly used in single-phase systems to switch between mains and generator power, provided it is correctly specified and installed.