Overview
The Furnas 958L109441U solid-state overload relay is engineered for industrial motor protection and machinery automation. This Series B unit combines solid-state switching technology with thermal overload sensing to protect motors and control circuits from damage due to overcurrent conditions. Furnas solid-state relays are trusted in OEM and retrofit applications requiring reliable, long-life protection without the maintenance demands of electromechanical designs.
Key Features
- Solid-state construction for long service life and rapid response
- Phase-loss detection to prevent single-phase motor damage
- Wide amperage range (22–44 amp) suitable for mid-range motor protection
- Manual/automatic reset modes for flexible operational control
- Compact design for panel mounting in control cabinets
Technical Specifications
- Current Rating: 22–44 amperes
- Type: Solid-state overload relay
- Series: B (Class 958/958L)
- Reset Mode: Manual and Automatic selectable
- Phase Loss Protection: Yes
- Mounting: Panel-mount or DIN-rail compatible (verify with your cabinet layout)
Typical Applications
- Three-phase motor protection in manufacturing and processing equipment
- Centrifugal pump and fan motor circuits
- Conveyor drive systems and material handling machinery
- HVAC equipment and air compressor motor protection
- Retrofit installations where solid-state overload sensing is required
Compatibility & Replacements
Compatible With
- Furnas/Siemens motor control centers and starters
- Three-phase AC power systems, 50/60 Hz
- Standard industrial control cabinets with DIN-rail or panel-mount spaces
- Manual and magnetic motor starters
Replaces / Drop-In Replacement For
- Compatible with Furnas 3UB85236EW2 as a direct replacement option (verify with your control schematic before installation)
- Other Class 958/958L Furnas solid-state overload relays in similar amperage ranges
Works With
- Furnas/Siemens contactors and motor starters
- Three-phase AC power distribution and motor circuits
- Industrial control relay logic and PLC-based automation systems
- Manual and automatic reset circuits
