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lovato sm1r0040 sm1 rotary control motor circuit breaker 0.25 – 0.4 amp
Lovato SM1R0040 motor protection circuit breaker with adjustable 0.25 to 0.40 A thermal protection, 100 kA breaking capacity and rotary knob operation.
£40.20
Why Choose the Lovato SM1R0040 Motor Protection Circuit Breaker?
The Lovato SM1R0040 is a compact and dependable 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 a rotary knob operating mechanism, providing reliable motor protection for industrial machinery and automation systems.
This manual motor starter features an adjustable thermal protection range of 0.25 to 0.40 A, making it ideal for protecting small motors in precision machinery, OEM equipment and industrial control panels. Its high short-circuit breaking capacity and UL Type E certification provide dependable performance in demanding applications.
With a rated current of 0.40 A, a 3-pole design and an impressive 100 kA breaking capacity at 400 V AC, the SM1R0040 delivers excellent protection while remaining compact enough for installation on standard DIN rails within electrical enclosures.
Key Advantages
- Compact motor protection circuit breaker for industrial motor applications.
- 0.25 to 0.40 A adjustable thermal trip range.
- 100 kA short-circuit breaking capacity at 400 V AC.
- Combined thermal and magnetic protection.
- Phase failure sensitive motor protection.
- Rotary knob operation with lockable OFF position.
Key Features
- Lovato SM1R motor protection circuit breaker series.
- 0.40 A rated current.
- 0.25 to 0.40 A thermal adjustment range.
- 3-pole motor protection.
- Magnetic and thermal trip protection.
- Certified UL Type E.
- 35 mm DIN rail mounting.
- Suitable for industrial control panels and machine building.
Reliable Motor Protection for Industrial Applications
Motor protection circuit breakers such as the Lovato SM1R0040 help prevent motor damage by disconnecting the circuit during overload, short-circuit or phase failure conditions. This improves equipment reliability while reducing maintenance costs and unplanned downtime in industrial installations.
The SM1R range is designed for machine builders, panel manufacturers and maintenance engineers requiring compact, reliable and easy-to-install motor protection devices for industrial control systems.
Typical Applications
- Three-phase motor protection.
- Industrial control panels.
- Machine building and OEM equipment.
- Packaging and processing machinery.
- Pumps, fans and conveyor systems.
- Automation and motor control centres.
Technical Specifications
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| Current | 0.4 A | |
|---|---|---|
| Application | Motor protection | |
| Actuator Type | Rotary | |
| Terminal Type | Screw Terminal | |
| Current Range | 0.1–0.4 A | |
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | Motor protection breaker | |
| Breaking Capacity | 100 kA | |
| Manufacturer | Lovato Electric | |
| Series | SM1R | |
| Model | SM1R0040 | |
| Product type | Motor protection circuit breaker | |
| Rated current | 0.40 A | |
| Thermal trip adjustment range | 0.25 to 0.40 A | |
| Number of poles | 3 | |
| Type of protection | Magnetic and thermal | |
| Type of control | Rotary knob | |
| Short-circuit breaking capacity (Icu) | 100 kA at 400 V AC | |
| 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 | |
| Weight | approx. 278 g | |
| HS Code | 85362010 |
Frequently Asked Questions
What is the Lovato SM1R0040 used for?
The Lovato SM1R0040 protects small three-phase motors against overloads, short circuits and phase failure.
What current range does the SM1R0040 support?
The adjustable thermal protection range is 0.25 to 0.40 A.
What is the breaking capacity of the SM1R0040?
The breaker provides a maximum short-circuit breaking capacity of 100 kA at 400 V AC.
Can the SM1R0040 be mounted on a DIN rail?
Yes. It is designed for installation on a standard 35 mm DIN rail inside electrical control panels.
Does the SM1R0040 provide phase failure protection?
Yes. The breaker includes phase failure sensitive protection together with thermal and magnetic trip functions.
Trusted by Panel Builders Worldwide
Lovato SM1R motor protection circuit breakers are trusted by machine builders, OEM manufacturers and industrial engineers for dependable motor protection, long service life and reliable performance in demanding automation applications.
