SM3R9900 Lovato rotary motor protection circuit beaker 80-100 amp

Why Choose the SM3R9900?

Designed for demanding motor control, the Lovato SM3R9900 motor protection circuit breaker (SKU SM3R9900) pairs adjustable thermal protection with high short‑circuit performance. It offers an 80–100 A setting range with 100 A rated current, 50 kA Icu at 400 V, and a 3‑pole build. A robust rotary knob ensures straightforward operation, while compliance with IEC/EN 60947 standards, UL508 and CSA C22.2 n° 14 ensures recognised approvals.

Engineered for reliability, this magnetic and thermal unit achieves 1000 V rated insulation (Ui) and 6 kV impulse withstand (Uimp), with a mechanical life of 50,000 cycles. It operates from -20 to +70 °C up to 3000 m altitude, and is UL Type E certified. Terminal tightening torque is 4.5 to 4.5 Nm, and weight is 2200 g, supporting solid, long‑term service.

Key Benefits

• 50 kA Icu at 400 V for dependable short‑circuit interruption
• 80–100 A thermal adjustment to match motor full‑load current
• Magnetic and thermal protection for overloads and short‑circuits
• Three‑pole design suited to common three‑phase motor feeders
• Rotary knob control for clear, quick setting and operation
• 1000 V Ui and 6 kV Uimp withstand enhance insulation robustness
• UL Type E and IEC/EN compliance for assured panel integration

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 SM3R9900 motor protection circuit breaker
• Installation leaflet
• Conformity and certification information
• Protective packaging

Applications

• Motor feeders in industrial control panels
• Pumps, fans and compressors protection
• Conveyors and material handling drives
• HVAC and building services motors
• General-purpose three-phase motor circuits

Safety note: Installation and adjustment must be performed by competent personnel with power isolated. Set the thermal range to match the motor current, tighten terminals to 4.5 to 4.5 Nm, and observe environmental and short‑circuit ratings.