lovato sm1r0040 sm1 rotary control motor circuit breaker 0.25 - 0.4 amp

Why Choose the SM1R0040?

The Lovato SM1R0040 motor protection circuit breaker delivers dependable protection for fractional‑amp motors. With an adjustable thermal trip range of 0.25…0.4 A and combined magnetic and thermal protection, it safeguards motors and wiring against overloads and short circuits. This 3‑pole, rotary‑knob unit achieves an IEC Icu of 100 kA at 400 V and is certified UL Type E for streamlined panel compliance.

Engineered for demanding environments, the SM1R series offers a rated insulation voltage Ui of 690 V, 6 kV impulse withstand, and a mechanical life of 100000 cycles. It operates from −20 to +60 °C up to 3000 m altitude and meets IEC/EN 60947 standards, UL508 and CSA C22.2 n° 14, while the rotary knob enables precise setting within the 0.25…0.4 A range.

Key Benefits

• High breaking capacity: Icu 100 kA at 400 V per IEC.
• Adjustable 0.25…0.4 A thermal trip for accurate motor protection.
• Combined magnetic and thermal protection enhances circuit safety.
• Rotary knob control for fast, precise current setting.
• 3‑pole design suited to a wide range of motor circuits.
• Rated insulation Ui 690 V and Uimp 6 kV for resilience.
• Operates −20 to +60 °C; mechanical life of 100000 cycles.

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: 320 g

What’s Included

• Lovato SM1R0040 motor protection circuit breaker
• Quick start and safety information
• Technical datasheet (downloadable PDF)

Applications

• Protection of small motors within the 0.25…0.4 A range
• Industrial control panels requiring IEC/EN, UL and CSA conformity
• OEM machinery, pumps, fans and conveyors in high fault level systems
• Retrofit upgrades where UL Type E certification is required
• Motor circuits demanding 690 V insulation and 6 kV impulse withstand

Safety note: Installation and adjustment must be performed by qualified personnel. Always isolate power before work and follow the manufacturer’s instructions and applicable IEC/UL/CSA standards.