Lovato SM1P4000 motor protection circuit breaker with 30 to 40 A adjustable thermal trip range, magnetic and thermal protection, push-button control and 10 kA Icu breaking capacity at 400 V AC.
£158.44
The Lovato SM1P4000 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 30 to 40 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 40 A and a 10 kA Icu short circuit breaking capacity at 400 V AC, the SM1P4000 is ideal for protecting industrial motors and control applications where dependable overload and fault protection is essential.
Motor protection circuit breakers such as the Lovato SM1P4000 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 motor protection with simple operation, accessory compatibility and dependable performance.
| Phase | Three Phase |
|---|---|
| Manufacturer | Lovato Electric |
| Series | SM1P |
| Model | SM1P4000 |
| Product type | Motor protection circuit breaker |
| Rated current | 40 A |
| Thermal trip adjustment range | 30 to 40 A |
| Number of poles | 3P |
| Type of protection | Magnetic and thermal |
| Breaking capacity | 10 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 10A |
| Control type | Push button |
| Mounting type | 35 mm DIN rail |
| Protection rating | IP20 |
| Weight | Approx. 296 g |
| HS Code | 85362010 |
The SM1P4000 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 30 to 40 A, making it suitable for industrial motor protection applications.
The Lovato SM1P4000 provides a short circuit breaking capacity of 10 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 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...