Why Choose the Lovato 11RFNA933 Thermal Overload Relay?
The Lovato 11RFNA933 is a thermal motor protection relay designed for direct mounting with compatible Lovato contactors. With an adjustable operational current range of 2–3.3 A, it provides overload protection for motors used in industrial control and automation applications.
Part of Lovato Electric’s motor protection range, the 11RFNA933 combines an adjustable thermal overload setting with automatic reset functionality and phase-failure sensitivity. This allows the protection setting to be matched to the motor’s rated current while supporting compact motor starter assemblies.
The 11RFNA933 is a Class 10A thermal overload relay and incorporates 1 NO + 1 NC auxiliary contacts. Its direct-mounting format makes it suitable for compact industrial motor control panels, machinery and OEM automation systems.
Key Advantages
- Adjustable 2–3.3 A motor current range.
- Thermal overload protection for motor control applications.
- Automatic reset functionality.
- Phase-failure-sensitive design.
- Class 10A tripping characteristic.
- Includes 1 NO + 1 NC auxiliary contacts.
- Direct-mounting design for compact motor starter assemblies.
Key Features
- Lovato Electric thermal overload relay.
- 2–3.3 A adjustable current range.
- Class 10A overload tripping characteristic.
- Automatic reset.
- Phase-failure-sensitive operation.
- 1 normally open + 1 normally closed auxiliary contact.
- 10 A conventional free-air thermal current for the auxiliary contacts.
- Direct mounting for compact motor control assemblies.
Thermal Overload Protection for Industrial Motors
Thermal overload relays are used in motor control circuits to protect motors against sustained overcurrent conditions that can result in excessive heating. The adjustable current setting allows the protection threshold to be matched to the rated current of the connected motor.
The Lovato 11RFNA933 provides an adjustable 2–3.3 A range together with Class 10A tripping, automatic resetting and phase-failure sensitivity, making it suitable for compact motor starter and industrial machinery applications.
Typical Applications
- Thermal overload protection for electric motors.
- Industrial motor starter assemblies.
- Machinery control panels.
- Industrial automation systems.
- OEM machine-building equipment.
- Motor switching and protection circuits.
