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Learn more by watching our HAGER SFT240 | Changeover Switch 2 Pole 40 Amp video.
The Hager SFT240 is a 2-pole 40A manual changeover switch rated to 240V AC, built for switching a load between two supply sources. The SFT240 has a centre-off position and a top common point, so the active and neutral of one source connect at a time and the two supplies are never paralleled. It is a DIN-rail modular device that complies with AS/NZS 60947-3 for low-voltage switchgear.
Switching a circuit between mains and a standby generator needs a break-before-make action that prevents the two supplies from being paralleled. The SFT240 handles this with a centre-off position that isolates the load before the second source is energised. A top common point and a defined two-pole terminal layout simplify termination at the switchboard. The compact two-module width preserves space on a crowded DIN rail.
Licensed electricians reach for the SFT240 on standby-supply jobs because it lands in a standard DIN enclosure alongside the circuit protection it sits next to. The 200,000-operation mechanical endurance means it holds up to repeated manual transfers over the life of a generator setup. Screw terminals take up to 16mm² rigid cable, so it carries the feeder sizes a 40A standby circuit runs. It is a switch contractors specify again once they have wired one in.
The SFT240 is supplied as an IP20 bare modular device and is not weatherproof. It must be installed inside a switchboard or suitable enclosure and is not rated for exposed outdoor or damp locations. It is a manual changeover switch and does not transfer between sources automatically.
Verified Sparky Direct customer reviews: Hager SFT240 Changeover Switch 2 Pole 40 Amp (SFT240)
"Good product, easy to follow drawing of contacts" — Grahame
"I've recommended the SFT240 to others" — Jim
"As per normal excellent quality product from Hager" — John
(SFT240)
The Hager SFT240 complies with AS/NZS 60947-3, the Australian and New Zealand standard for low-voltage switchgear and changeover switches. It is rated 40A at 240V with a 440V insulation voltage and a 4kV impulse withstand. Installation should follow the AS/NZS 3000 wiring rules.
The SFT240 has a rated operational voltage of 240V AC, with a rated insulation voltage of 440V and a 4kV rated impulse withstand. It is a single-phase, two-pole device built for switching a 240V mains and standby supply at up to 40A.
The changeover switch is IP20 rated, so it resists solid objects but not water. The bare modular device must be installed inside a switchboard or enclosure and is not suitable for exposed or damp locations. On a board it clips to existing DIN rail.
Installation must be carried out by a licensed electrician. The SFT240 clips onto 35mm DIN rail and wires through screw terminals that accept 1.5 to 16mm² rigid cable, torqued to 1.8Nm. It connects between two supply sources and the common load.
The centre-off position gives a middle setting where both supplies are disconnected from the load. This break-before-make action stops mains and a generator being connected at the same time, which prevents back-feed. The switch then connects the load to whichever source is selected.
The SFT240 is rated for 40A in the AC21 and AC22 utilisation categories. AC21 covers resistive loads, and AC22 covers mixed resistive and inductive loads such as motors and pumps. It suits a 40A standby or transfer circuit feeding a home, shed, or pump.
The changeover switch is a manual unit, so an operator moves it by hand to select mains, off, or generator. It does not sense a power outage or transfer sources on its own. An automatic transfer system is needed where hands-off switching during an outage is required.
The mechanical endurance is rated at 200,000 operations, with electrical durability of 25,000 cycles at nominal load. Sparky Direct lists a 2-year warranty for both domestic and commercial use, starting from the invoice date. Warranty is void if the unit is not installed by a licensed electrician.
The Hager SFT240 is available online from Sparky Direct, with Australia-wide delivery to any state or territory including regional areas. Sparky Direct is an Australian electrical wholesaler established in 2005, supplying more than 500,000 customers with transparent trade pricing.
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Warranty starts from Invoice Date
Domestic Use: 2 Year
Commercial Use: 2 Year
Warranty Method: Return to Sparky Direct
These specifications and characteristics outline physical, mechanical, electrical details.
| Brand | Hager Electrical |
| SKU | SFT240 |
| Model # | SFT240 |
| Barcode # | 3250615510921 |
| Package Weight | 0.145kg |
| TYPE | VALUE |
|---|---|
| Type | Circuit Protection |
| Brand | Hager Electrical |
| Rated Current (A) | 40 |
| Height (mm) | 83 |
| Width (mm) | 35 |
| Depth (mm) | 70 |
| Standards | AS/NZS 60947-3 |
| Mounting | DIN Rail |
| Voltage (V) | 240 |
| Number of Poles | 2 |
| IP Rating | IP20 ( IP40 Enclosed ) |
| Box increments (This item is sold individually) | 1 |
| Curve | C |
| Total Number of modules | 2 |
Electrical and HVAC products sold by Sparky Direct are intended for installation by licensed and appropriately qualified professionals in accordance with applicable Australian Standards and regulatory requirements. Customers are responsible for ensuring that any product purchased, including any related or associated components, is compatible and suitable for their intended installation and application.
Sparky Direct does not provide installation advice and does not assess product suitability for individual circumstances unless expressly confirmed in writing. Customers must confirm correct product selection, compatibility, compliance, and suitability with a licensed or appropriately qualified professional prior to purchase.
Tools sold by Sparky Direct must be used safely and in accordance with the manufacturer’s instructions. Customers are responsible for ensuring they have the necessary knowledge and competence to operate any tool purchased. If you are unsure how to safely or correctly use a tool, do not use it and seek guidance from the manufacturer or a suitably qualified professional.
Nothing in this clause limits or excludes any rights or guarantees available under the Australian Consumer Law.
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