lovato sm1r0400 sm1 rotary control motor circuit breaker 2.5 - 4 amp

Why Choose the SM1R0400?

Built for demanding motor circuits, the Lovato SM1R0400 motor protection circuit breaker delivers dependable protection in a compact package. With adjustable thermal trip from 2.5 to 4 A and an IEC Icu of 100 kA at 400 V, it safeguards against overloads and short circuits. A rotary knob provides straightforward control, and the 3‑pole design plus UL Type E certification make it ideal for standards‑driven panel builds.

Engineered to IEC/EN 60947-1, 60947-2 and 60947-4-1, this SM1R device offers robust electrical resilience with Ui 690 V and 6 kV impulse withstand. It operates from -20 to +60 °C and up to 3000 m altitude, with 100000 mechanical life cycles for reliability. Weighing 390 g, it specifies terminal tightening torque of 2.5 to 3 Nm to support secure connections during installation and maintenance.

Key Benefits

• High Icu 100 kA at 400 V for robust short-circuit protection.
• Adjustable thermal trip 2.5–4 A for precise motor overload matching.
• Magnetic and thermal protection improves motor and circuit safety.
• Rotary knob control for quick, dependable manual operation.
• UL Type E certification for panel compliance requirements.
• IEC/EN 60947 conformity for confidence in international standards.
• Rated insulation 690 V and 6 kV impulse withstand for resilience.
• 100000 mechanical life cycles for long-term reliability.

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 SM1R0400 motor protection circuit breaker
• Manufacturer documentation (datasheet/installation guidance)
• Protective packaging for safe transit

Applications

• Adjustable 2.5–4 A motor circuits requiring precise overload protection
• IEC/EN-compliant control panels needing Icu 100 kA at 400 V
• UL Type E motor starter assemblies and feeder circuits
• Installations operating from -20 to +60 °C and up to 3000 m

Safety note: Installation must be performed by qualified personnel. Isolate power before work, follow manufacturer documentation and applicable standards, and tighten terminals to 2.5–3 Nm.