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.
£337.51
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.
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.
| Phase | Three Phase |
|---|---|
| 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 |
The SM3R7500 is used to protect industrial motors against overloads and short circuits while also providing manual switching and isolation.
The SM3R7500 has an adjustable thermal trip range of 55–75 A and a rated current of 75 A.
The SM3R7500 has an IEC short-circuit breaking capacity of 50 kA at 400 V AC.
It provides thermal and magnetic protection, covering both motor overload and short-circuit fault conditions.
Yes. It is designed for industrial motor control panels, motor control centres, OEM machinery and automation systems.
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.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...