SM3R7500 Lovato rotary motor protection circuit beaker 55-75 amp

Why Choose the SM3R7500?

The Lovato SM3R7500 Motor Protection Circuit Breaker combines dependable overload and short‑circuit protection with straightforward rotary control. With a 55…75 A thermal trip adjustment and 75 A rated current, this 3‑pole device delivers a 50 kA Icu at 400 V for robust motor feeder protection. SKU SM3R7500 features magnetic and thermal protection and a clear rotary knob, making adjustment straightforward across diverse industrial applications.

Built for demanding panels, the SM3R series breaker offers Ui 1000 V and 6 kV impulse withstand, a −20 to +70 °C operating range, and 50,000 mechanical cycles. Certified UL Type E and conforming to IEC/EN 60947‑1, 60947‑2, 60947‑4‑1, UL508 and CSA C22.2 n° 14, it supports compliant assemblies up to 3000 m altitude, delivering reliable motor protection and consistent performance.

Key Benefits

• 50 kA Icu at 400 V for strong short‑circuit protection.
• Adjustable 55…75 A thermal range simplifies accurate motor protection settings.
• Magnetic and thermal trip delivers fast overload and fault response.
• UL Type E certification supports compliant Type E assemblies.
• 3‑pole design with Ui 1000 V and 6 kV Uimp.
• Rated current 75 A suits medium to large three‑phase motors.
• Operates from −20 to +70 °C for varied installation environments.
• Mechanical life of 50,000 cycles supports long‑term reliability.

Technical Specification

• Product type designation: SM3R
• Number of poles: 3
• Rated insulation voltage Ui (IEC/EN): 1000 V
• Rated impulse withstand voltage Uimp: 6 kV
• Mechanical life: 50000 cycles
• Terminal tightening torque: 4.5 to 4.5 Nm
• Operating temperature: -20 to +70 °C
• Storage temperature: -50 to +80 °C
• Max altitude: 3000 m
• Weight: 2200 g

What’s Included

• Lovato SM3R7500 motor protection circuit breaker (3‑pole)
• Integrated rotary control knob
• Quick start/installation leaflet
• Protective packaging

Applications

• Protection of three‑phase motors within the 55…75 A range
• Industrial control panels and motor feeders requiring 50 kA Icu at 400 V
• Pumps, fans, compressors and conveyors in general industrial environments
• UL Type E motor starter assemblies and compliant control gear
• Installations up to 3000 m altitude within −20 to +70 °C

Safety note: Only qualified personnel should install and commission this device. Isolate power, verify absence of voltage, and follow the manufacturer’s instructions and applicable IEC/EN and UL standards.