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SM1P0040

Motor Protection Circuit Breaker SM1P, 0.25 to 0.4A (100kA)

SM1P0040

In stock

SM series motor protection circuit breakers

The Lovato SM series motor protection circuit breakers offer comprehensive and modernized protection for electric motors across the full spectrum of industrial requirements. Spanning rated currents from 0.1 A to 100 A, the SM series includes three compact frame sizes, SM1 (up to 40 A), SM2 (34-63 A), and SM3 (55-100 A), with a choice of pushbutton or rotary knob operation depending on model. These breakers are ideal for safeguarding motors against overloads, short circuits, and phase failures with integrated thermal and magnetic protection features.

Equipped with a rated insulation voltage of 690 V and phasefailure sensitivity, the SM series supports Type 2 coordination with contactors and is wellsuited for demanding installations. Additional features include temperature compensation, snapon accessories (auxiliary contacts, shunt trip, undervoltage release), and a triptest function for SM1R models. Their modular design accommodates a wide range of motor protection needs in sectors such as manufacturing, water treatment, and infrastructure systems, where reliable performance and safety compliance are paramount.

Excl. GST

SM1 series - range extension up to 40A

SM1 series motor protection devices are designed with advanced safety and performance in mind, offering the following key features.


• Temperature compensation
• Rated insulation voltage Ui 690V
• For safety lockout hasps (contact us)
• Thermal and magnetic protection (13 x Ie)
• High fault level (type 2 co-ordination with contactors)
• Differential single-phase protection (phase failure sensitive)
• Snap-on auxiliary contacts, shunt trip and undervolt release
• 3 sizes, from 0.1 to 100A, with pushbutton and rotary versions
• Trip-test facility/indication of trip condition overload (or) short circuit (SM1R series)
• Magnetic protection for transformer (20 x Ie) and for fuses monitoring (on request)

SM2 series - range extension 34 to 50A

Lovato SM2 series motor protection devices are engineered to deliver superior safety, durability, and efficiency across a wide range of applications. They provide optimal protection for motors and equipment, helping to minimise downtime and enhance operational performance.


• Temperature compensation
• Rated insulation voltage Ui 690V
• For safety lockout hasps (contact us)
• Thermal and magnetic protection (13 x Ie)
• High fault level (type 2 co-ordination with contactors)
• Differential single-phase protection (phase failure sensitive)
• Snap-on auxiliary contacts, shunt trip and undervolt release
• 3 sizes, from 0.1 to 100A, with pushbutton and rotary versions
• Trip-test facility/indication of trip condition overload (or) short circuit (SM1R series)
• Magnetic protection for transformer (20 x Ie) and for fuses monitoring (on request)

SM3 Series - range extension from 55 to 100A

Combining safety, durability, and precision, SM3 series motor protection circuit breaker deliver exceptional performance with features such as:


• Temperature compensation
• Rated insulation voltage Ui 690V
• For safety lockout hasps (contact us)
• Thermal and magnetic protection (13 x Ie)
• High fault level (type 2 co-ordination with contactors)
• Differential single-phase protection (phase failure sensitive)
• Snap-on auxiliary contacts, shunt trip and undervolt release
• 3 sizes, from 0.1 to 100A, with pushbutton and rotary versions
• Trip-test facility/indication of trip condition overload (or) short circuit (SM1R series)
• Magnetic protection for transformer (20 x Ie) and for fuses monitoring (on request)

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