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SM3R7500 Lovato rotary motor protection circuit beaker 55-75 amp
Lovato SM3R7500 motor protection circuit breaker with 55-75 A adjustable thermal trip range, 75 A rated current and 50 kA breaking capacity at 400 V AC.
£202.50
Why Choose the Lovato SM3R7500 Motor Protection Circuit Breaker?
The Lovato SM3R7500 is a high performance motor protection circuit breaker designed to provide reliable thermal and magnetic protection for industrial motors. As part of the Lovato SM3R motor protection circuit breaker series, it combines overload protection, short-circuit protection and manual motor control in one compact device.
With an adjustable thermal trip range of 55–75 A and a rated current of 75 A, the SM3R7500 is suitable for larger motor control applications where dependable protection and clear manual operation are essential. Its 50 kA breaking capacity at 400 V AC provides robust fault protection for demanding industrial installations.
The SM3R7500 features thermal magnetic protection, rotary knob operation and compatibility with Lovato SM series accessories, making it ideal for motor control centres, machinery panels and automation systems requiring safe and efficient motor protection.
Key Advantages
- Compact motor protection circuit breaker for industrial motor control.
- 55–75 A adjustable thermal trip range for motor overload protection.
- 75 A rated current for higher power motor applications.
- 50 kA short-circuit breaking capacity at 400 V AC.
- Thermal and magnetic protection in one device.
- Rotary knob control for clear manual operation and isolation.
Key Features
- Lovato SM3R motor protection circuit breaker series.
- 55–75 A adjustable overload setting.
- 75 A rated current.
- 3-pole motor protection circuit breaker.
- IEC breaking capacity Icu 50 kA at 400 V AC.
- Thermal magnetic sensing for overload and short-circuit protection.
- Rotary knob operating mechanism.
- Suitable for DIN rail mounting in industrial control panels.
Reliable Motor Protection for Industrial Applications
Motor protection circuit breakers help protect electric motors from overloads and short circuits while allowing operators to manually switch and isolate motor circuits. By combining thermal overload protection with magnetic short-circuit protection, they support safe, reliable and space-efficient motor control panel design.
The Lovato SM3R7500 is engineered for demanding industrial installations where higher current motor protection, dependable switching and strong fault-breaking performance are required.
Typical Applications
- Industrial motor control panels.
- Motor control centres and distribution boards.
- Pumps, fans and compressor systems.
- Conveyors and material handling equipment.
- OEM machinery and automation systems.
- Manufacturing and process control installations.
Technical Specifications
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| Current | 75 A | |
|---|---|---|
| Application | Motor protection | |
| Actuator Type | Rotary | |
| Terminal Type | Screw Terminal | |
| Current Range | 40–63 A, 63–100 A | |
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | Motor protection breaker | |
| Breaking Capacity | 50 kA | |
| Manufacturer | Lovato Electric | |
| Series | SM3R | |
| Model | SM3R7500 | |
| Product type | Motor protection circuit breaker | |
| Thermal trip adjustment range | 55–75 A | |
| Rated current (In) | 75 A | |
| Number of poles | 3 | |
| Type of protection | Magnetic and thermal | |
| Short-circuit breaking capacity (Icu) | 50 kA at 400 V AC | |
| Operating voltage | 230–690 V AC | |
| Insulation voltage | 1 kV | |
| Rated impulse withstand voltage | 8 kV | |
| Type of control | Rotary knob | |
| Electrical connection | Screw terminals | |
| Mounting type | DIN rail mounting | |
| Protection rating | IP20 | |
| Operating temperature | -20°C to +70°C | |
| Approximate dimensions | 165 × 70 × 169 mm | |
| Weight | approx. 2.3 kg | |
| Standards | IEC/EN 60947-1, IEC/EN 60947-2, IEC/EN 60947-4-1, UL508, CSA C22.2 No.14 | |
| Certifications | cULus, EAC | |
| HS Code | 85362090 |
Frequently Asked Questions
What is the Lovato SM3R7500 used for?
The SM3R7500 is used to protect industrial motors against overloads and short circuits while also providing manual switching and isolation.
What current range does the SM3R7500 cover?
The SM3R7500 has an adjustable thermal trip range of 55–75 A and a rated current of 75 A.
What is the breaking capacity of the SM3R7500?
The SM3R7500 has an IEC short-circuit breaking capacity of 50 kA at 400 V AC.
What type of protection does this circuit breaker provide?
It provides thermal and magnetic protection, covering both motor overload and short-circuit fault conditions.
Is the SM3R7500 suitable for industrial control panels?
Yes. It is designed for industrial motor control panels, motor control centres, OEM machinery and automation systems.
Trusted by Industrial Control Professionals
Lovato SM3R motor protection circuit breakers are widely used by panel builders, automation engineers and machine manufacturers to provide reliable motor protection, safe switching and dependable operation in demanding electrical installations.
