Hager | Changeover Switch 2 Pole 25 Amp | C-Curve DIN Rail
The Hager SFT225 is a 2-pole changeover switch rated 25 amperes 240V AC. The SFT225 switches a house's electricity supply from mains grid to generator or alternate source, preventing both supplies from feeding the circuit simultaneously. It mounts on DIN rail and complies with AS/NZS 60947-3 standard for manual changeover control.
Generator installations and solar inverter systems require a changeover switch that prevents both power sources from feeding the circuit at once. A manual changeover switch makes this straightforward—the operator switches from grid to generator during an outage, restoring power to the house while keeping the two supplies isolated. This is a standard install for properties with backup generation.
Licensed electricians favour Hager changeover switches for backup power systems because the SFT225 installs fast on standard DIN rail, no special wiring required. Electricians can stock the SFT225 for generator jobs without worrying about variant compliance—it handles 25A circuits across AC21 and AC22 duty classes. Once installed, the switch sits behind the main switchboard, out of sight, and operators switch it during outages without calling the sparky back.
Features
- Changeover operation — switches between two independent AC power sources with a single hand operation, preventing simultaneous feeding.
- 25 ampere rating — suitable for most domestic and small commercial circuits running lights, power outlets, and air conditioning on separate 25A subcircuits.
- 2-pole configuration — switches both active and neutral simultaneously, meeting safety and local code requirements for changeover duty.
- DIN rail mounting — fits standard 35mm DIN rail in electrical cabinets, switchboards, and enclosures alongside other circuit protection devices.
- C-curve protection — pre-configured for general-purpose AC loads; no curve selection needed at installation time.
- 25,000 operating cycles — rated for AC21 and AC22 duty classes, typical for generator changeover and infrequent switching applications.
- 200,000 mechanical operations — long mechanical life spans years of switchboard operation and testing.
- Rated 240V AC — compatible with standard Australian mains voltage, suited for domestic and light commercial generator backup systems.
- IEC 60947-3 compliant — certified to international standards for changeover switches, assuring correct operation and safety.
- IP20 protection rating — internal contacts protected from dust; suitable for cabinet-mounted installation, not recommended for outdoor or exposed wet locations.
- Compact dimensions — 83mm height, 35mm width, 70mm depth fits neatly into crowded switchboards without modification to existing enclosures.
Where to use
- Generator backup installations — the SFT225 provides safe mains-to-generator switchover for domestic properties with standby generation systems.
- Solar inverter systems — switches between grid power and battery inverter during load shedding or grid outages on hybrid solar installations.
- Caravan and motorhome installations — dual-power changeover between 240V mains and onboard generator power when parked and unplugged.
- Telecom tower backup — remote sites often use changeover switches for mains-to-UPS or mains-to-genset switchover on their power distribution boards.
- Agricultural buildings and farms — portable generators or solar arrays on farms require changeover switches for safe power routing during outages.
- Rental and holiday properties — backup generators are common on holiday rentals; changeover switches simplify power supply switching for property managers.
The Hager SFT225 is rated for indoor cabinet-mounted use only and is not suitable for outdoor, damp, or exposed wet locations. It is not designed for high-frequency switching or for loads exceeding 25 amperes. Installation must be carried out by a licensed electrician in compliance with AS/NZS 3000 and local regulations.
Verified Sparky Direct customer reviews: HAGER SFT225 | Changeover Switch 2 Pole 25 Amp (SFT225)
"Great for use in inverter installions makes install a breeze." — Dave
"Great product for generator and normal supply change over switch" — Scott
"Worked as per spec" — Wax