Lovato SM1RM1800 motor protection circuit breaker with magnetic protection, 18 A rated current and 100 kA breaking capacity at 400 V AC for industrial motor protection.
£122.84
The Lovato SM1RM1800 is a compact motor protection circuit breaker with magnetic protection designed to provide reliable short-circuit protection for industrial motor circuits, machinery and automation systems. As part of the dependable Lovato SM1RM series, it delivers outstanding fault interruption performance in a compact three-pole design suitable for modern electrical control panels.
Designed for demanding industrial environments, the SM1RM1800 rapidly disconnects circuits during short-circuit conditions, helping to protect motors, cables and associated electrical equipment. Its rotary operating knob provides simple local control, while compatibility with the extensive Lovato SM1 accessory range allows straightforward integration into motor starters and industrial switchgear.
With a 18 A rated current, a 690 V AC rated insulation voltage and an impressive 100 kA breaking capacity at 400 V AC, the SM1RM1800 is an excellent solution for panel builders, OEM machine manufacturers and industrial maintenance engineers requiring dependable magnetic motor protection.
Motor protection circuit breakers help protect motors and electrical equipment by rapidly disconnecting the circuit during short-circuit conditions. The Lovato SM1RM1800 provides dependable magnetic protection while maintaining compact dimensions suitable for modern industrial control panels.
The SM1RM series is widely specified by panel builders and automation engineers requiring high breaking capacity, straightforward installation and compatibility with a comprehensive range of motor control accessories.
| Phase | Three Phase |
|---|---|
| Manufacturer | Lovato Electric |
| Series | SM1RM |
| Model | SM1RM1800 |
| Product type | Motor protection circuit breaker |
| Rated current | 18 A |
| Protection type | Magnetic |
| Breaking capacity (Icu) | 100 kA at 400 V AC |
| Operating voltage | 230-690 V AC |
| Rated insulation voltage | 690 V AC |
| Rated impulse withstand voltage | 6 kV |
| Rated frequency | 50 / 60 Hz |
| Number of poles | 3 |
| Control type | Rotary knob |
| Electrical connection | Screw terminals |
| Protection rating | IP20 |
| Mounting type | Screw or 35 mm DIN rail mounting |
| Dimensions (H × W × D) | approx. 97 × 45 × 91 mm |
| Weight | approx. 340 g |
| HS Code | 85362010 |
The SM1RM1800 provides magnetic short-circuit protection for industrial motor circuits and electrical control equipment.
The breaker has a 18 A rated current.
The SM1RM1800 provides a 100 kA breaking capacity at 400 V AC, making it suitable for demanding industrial installations.
It can be installed using either a standard 35 mm DIN rail or direct screw mounting inside industrial control panels.
Yes. The breaker is compatible with Lovato auxiliary contacts, door coupling handles, connection modules and other SM1 series accessories.
Lovato SM series motor protection circuit breakers are trusted by machine builders and industrial automation professionals for dependable protection, high breaking capacity and long-term reliability.
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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...