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RFN380040 - T/O RELAY 0 25-0 4A MAN/AUTO
MPN: RFN380040
Special Price
£47.42
£39.52
Regular Price
£79.03
Why Choose the RFN380040?
Designed for reliable motor protection, the Lovato RFN380040 thermal overload relay safeguards three-phase installations with a precise 0.25…0.40 A setting range. This three-pole device offers manual or automatic resetting and is non phase failure/non single-phase sensitive. For fast assembly, it mounts directly on BF09–BF38 contactors, providing a compact solution that integrates seamlessly into BF series motor starters.
Built for demanding environments, it features Ui 690 V and 6 kV impulse withstand, with IP20 frontal protection and pollution degree 3. Rated Ith 10 A, it operates from −25 to 60 °C up to 3000 m altitude. A compact 160 g unit, the RFN380040 secures with 2 to 2.5 Nm terminal torque and complies with IEC/EN 60947 and UL/CSA standards.
Key Benefits
- Precise 0.25…0.40 A adjustable thermal protection for motor circuits.
- Manual or automatic reset options to suit application requirements.
- Direct mounting on BF09–BF38 contactors simplifies assembly and saves space.
- Three-pole design suited to three-phase motor protection schemes.
- Rated insulation 690 V and 6 kV impulse withstand for durability.
- IP20 frontal protection and pollution degree 3 for safer panels.
- Operates −25 to 60 °C, up to 3000 m altitude.
Technical Specification
- Number of poles: 3
- Pollution degree: 3
- IP degree (frontal): IP20
- Rated insulation voltage Ui (IEC/EN): 690 V
- Rated impulse withstand voltage Uimp: 6 kV
- Terminal tightening torque: 2 to 2.5 Nm
- Ith (IEC): 10 A
- Operating temperature: -25 to 60 °C
- Storage temperature: -50 to 70 °C
- Max altitude: 3000 m
- Weight: 160 g
What’s Included
- Lovato RFN380040 thermal overload relay
- Installation leaflet
- Manufacturer compliance documentation
- Protective packaging
Applications
- Three-phase motor starters using BF09–BF38 contactors
- Industrial control panels requiring thermal motor protection
- Pumps, fans and conveyors driven by BF series contactors
- OEM machinery utilising BF motor control assemblies
Frequently Asked Questions
What is the adjustable current range of the RFN380040?
The setting range is 0.25...0.4 A.
Is this relay phase-failure sensitive?
No, it is non phase failure/non single-phase sensitive.
How can the relay be reset?
It supports manual or automatic resetting.
Which contactors can it be mounted on?
It mounts directly on BF09–BF38 contactors.
What standards and certifications does it meet?
It conforms to IEC/EN 60947-1 and 60947-4-1, UL508 and CSA C22.2 n° 14.
Safety note: Installation and adjustment must be performed by qualified personnel. Isolate power before work, tighten terminals to 2 to 2.5 Nm, and observe the stated environmental ratings and applicable standards.
| Manufacturer Part Number | RFN380040 |
|---|---|
| Manufacturer | Lovato |
| HS Code | 85364900 |
| Barcode | 8013975169810 |
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