lovato sm1r4000 sm1 rotary control motor circuit breaker 30 - 40 amp

Why Choose the SM1R4000?

Lovato’s SM1R4000 motor protection circuit breaker delivers dependable protection for motor circuits, combining thermal and magnetic trip functions with a simple rotary knob. With an adjustable 30–40 A thermal setting and a robust 20 kA Icu at 400 V, it suits a wide range of 3‑pole applications. The SM1R series design supports straightforward panel installation and dependable operation.

Built for demanding environments, the SM1R4000 offers Ui 690 V and Uimp 6 kV, with a mechanical life of 100000 cycles. It operates from −20 to +60 °C and up to 3000 m altitude, with terminal tightening torque of 2.5 to 3 Nm. It conforms to IEC/EN 60947-1/-2/-4-1, UL508 and CSA C22.2 n° 14 for assured compatibility in compliant control panels.

Key Benefits

• Adjustable thermal trip 30…40 A for precise motor protection.
• 20 kA Icu at 400V ensures robust short-circuit performance.
• Combined magnetic and thermal protection for comprehensive coverage.
• 3-pole configuration suits typical motor circuit arrangements.
• Rotary knob control enables quick, intuitive setting and reset.
• High insulation rating Ui 690 V enhances system resilience.
• Wide operating range −20 to +60 °C for varied environments.

Technical Specification

• Product type designation: SM1R
• Number of poles: 3
• Rated insulation voltage Ui (IEC/EN): 690 V
• Rated impulse withstand voltage Uimp: 6 kV
• Mechanical life: 100000 cycles
• Terminal tightening torque: 2.5 to 3 Nm
• Operating temperature: -20 to +60 °C
• Storage temperature: -50 to +80 °C
• Max altitude: 3000 m
• Weight: 390 g

What’s Included

• Lovato SM1R4000 motor protection circuit breaker
• Manufacturer datasheet (digital download)
• Protective packaging for transit

Applications

• Protection of motor circuits within 30…40 A settings
• IEC/EN 60947-compliant control panels and distribution boards
• Installations requiring 20 kA Icu at 400V short-circuit capability
• 3-pole motor starters and control assemblies

Safety note: Install and commission only by qualified personnel. Isolate power before work, tighten terminals to 2.5–3 Nm, and follow the manufacturer instructions and applicable IEC/EN standards.