Lovato SM1R1800 motor protection circuit breaker with adjustable 13 to 18 A thermal protection, 100 kA breaking capacity and rotary knob operation.
£92.77
The Lovato SM1R1800 is a compact and reliable motor protection circuit breaker designed to protect three-phase motors against overloads, short circuits and phase failure conditions. As part of the Lovato SM1R series, it combines thermal and magnetic protection with rotary knob operation, making it suitable for industrial machinery, OEM equipment and automation systems.
This manual motor starter offers an adjustable thermal protection range of 13 to 18 A, providing accurate protection for industrial motor circuits. Its high short-circuit breaking capacity and compact construction make it ideal for demanding motor control applications where dependable protection and easy installation are required.
With a rated current of 18 A, a 3-pole configuration and a 100 kA breaking capacity at 400 V AC, the SM1R1800 provides robust motor protection whilst remaining compact enough for DIN rail installation inside electrical control panels.
Motor protection circuit breakers such as the Lovato SM1R1800 protect electric motors by disconnecting the supply during overload, short-circuit or phase failure conditions. This helps reduce the risk of motor damage, improve system reliability and minimise unplanned downtime in industrial installations.
The SM1R series is widely used by machine builders and panel manufacturers thanks to its compact footprint, adjustable protection settings and dependable switching performance. It provides reliable motor protection whilst simplifying installation in modern control systems.
| Phase | Three Phase |
|---|---|
| Manufacturer | Lovato Electric |
| Series | SM1R |
| Model | SM1R1800 |
| Product type | Motor protection circuit breaker |
| Rated current | 18 A |
| Thermal trip adjustment range | 13 to 18 A |
| Number of poles | 3 |
| Type of protection | Magnetic and thermal |
| Type of control | Rotary knob |
| Magnetic tripping | 13 × In |
| Short-circuit breaking capacity Icu at 400 V AC | 100 kA |
| Rated insulation voltage Ui | 690 V AC |
| Rated impulse withstand voltage Uimp | 6 kV |
| Frequency | 50 / 60 Hz |
| Tripping class | 10A |
| Protection rating | IP20 |
| Mounting type | 35 mm DIN rail / screw mounting |
| Approximate dimensions | 97 × 45 × 91 mm |
| HS Code | 85362010 |
The Lovato SM1R1800 protects three-phase motors against overloads, short circuits and phase failure conditions.
The adjustable thermal protection range is 13 to 18 A.
The breaker provides a short-circuit breaking capacity of 100 kA at 400 V AC.
Yes. It is designed for installation on a standard 35 mm DIN rail inside electrical control panels.
Yes. It combines adjustable thermal overload protection with magnetic short-circuit protection for comprehensive motor protection.
Lovato SM1R motor protection circuit breakers are trusted by machine builders, automation engineers and panel builders for reliable motor protection, long service life and dependable industrial performance.
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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...