Lovato SM1P0400 motor protection circuit breaker with 2.5 to 4 A adjustable thermal trip range, magnetic and thermal protection, push-button control and 100 kA Icu breaking capacity at 400 V AC.
£70.86
The Lovato SM1P0400 is a compact and reliable motor protection circuit breaker designed to protect three-phase electric motors against overloads, short circuits and phase failure. As part of the Lovato SM1P series, it combines magnetic and thermal protection in a robust 3-pole device suitable for industrial control panels, OEM machinery and automation systems.
This motor circuit breaker features an adjustable 2.5 to 4 A thermal trip range, allowing precise matching to the connected motor's full load current. Its push-button control provides simple manual operation, while the compact DIN rail format supports quick installation inside electrical enclosures and machine cabinets.
With a rated current of 4 A and a high 100 kA Icu short circuit breaking capacity at 400 V AC, the SM1P0400 is ideal for protecting small motors and industrial control applications where dependable fault protection is essential.
Motor protection circuit breakers such as the Lovato SM1P0400 combine thermal overload protection with magnetic short circuit protection to help prevent damage to motors and associated wiring. This supports safer operation, reduced downtime and improved reliability in industrial control systems.
The Lovato SM1P series is designed for control panel builders, machine builders and maintenance engineers who require compact, high breaking capacity motor protection with simple operation and dependable performance.
| Phase | Three Phase |
|---|---|
| Manufacturer | Lovato Electric |
| Series | SM1P |
| Model | SM1P0400 |
| Product type | Motor protection circuit breaker |
| Rated current | 4 A |
| Thermal trip adjustment range | 2.5 to 4 A |
| Number of poles | 3P |
| Type of protection | Magnetic and thermal |
| Breaking capacity | 100 kA Icu at 400 V AC |
| Rated operating voltage | 230 to 690 V AC |
| Rated insulation voltage | 690 V |
| Rated impulse withstand voltage | 6 kV |
| Frequency | 50 / 60 Hz |
| Trip class | Class 10 |
| Control type | Push button |
| Mounting type | 35 mm DIN rail |
| Protection rating | IP20 |
| Weight | Approx. 295 g |
| HS Code | 85362010 |
The SM1P0400 is used to protect three-phase electric motors against overloads, short circuits and phase failure in industrial control panels and machinery.
The adjustable thermal trip range is 2.5 to 4 A, making it suitable for small motor protection applications.
The Lovato SM1P0400 provides a short circuit breaking capacity of 100 kA Icu at 400 V AC.
This model uses push-button control for simple manual operation and reset.
Yes. The breaker is designed for mounting on a standard 35 mm DIN rail inside electrical enclosures and control panels.
Lovato SM1P motor protection circuit breakers are widely used by panel builders, machine builders and automation engineers to provide compact, reliable and high breaking capacity protection for industrial motor circuits.
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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...