Why Choose the Lovato SM1R4000 Motor Protection Circuit Breaker?
The Lovato SM1R4000 is a robust and reliable motor protection circuit breaker designed to protect three-phase motors against overloads, short circuits and phase failure conditions. As part of the Lovato SM1R series, it combines magnetic and thermal protection with rotary knob operation, making it suitable for industrial machinery, OEM equipment and motor control panels.
This manual motor starter offers an adjustable thermal protection range of 30 to 40 A, providing accurate protection for higher-current industrial motor circuits. Its compact design and dependable switching performance make it ideal for demanding motor control applications where safety, reliability and ease of installation are essential.
With a rated current of 40 A, a 3-pole configuration and a 20 kA breaking capacity at 400 V AC, the SM1R4000 delivers dependable motor protection whilst remaining suitable for DIN rail or screw mounting inside electrical control systems.
Key Advantages
- Compact motor protection circuit breaker for industrial motor applications.
- 30 to 40 A adjustable thermal trip range.
- 20 kA short-circuit breaking capacity at 400 V AC.
- Combined thermal and magnetic protection.
- Phase failure sensitive motor protection.
- Rotary knob operation with clear manual ON/OFF control.
Key Features
- Lovato SM1R motor protection circuit breaker series.
- 40 A rated current.
- 30 to 40 A thermal adjustment range.
- 3-pole motor protection.
- Magnetic and thermal trip protection.
- Magnetic tripping at approximately 13 × In.
- Rotary knob control with clear ON/OFF indication.
- 35 mm DIN rail or screw mounting.
Reliable Motor Protection for Industrial Machinery
Motor protection circuit breakers such as the Lovato SM1R4000 protect electric motors by disconnecting the supply during overload, short-circuit or phase failure conditions. This helps reduce the risk of motor damage, improve equipment reliability and minimise unplanned downtime within industrial installations.
The SM1R series is widely used by machine builders and panel manufacturers thanks to its compact footprint, dependable protection characteristics and straightforward installation. Its adjustable thermal setting allows accurate matching to the connected motor for improved operational reliability.
Typical Applications
- Three-phase motor protection.
- Industrial control panels.
- Machine building and OEM equipment.
- Packaging and production machinery.
- Pumps, compressors and conveyor systems.
- Automation and motor control centres.
