Product Description
Benefits & Applications
The FEM3T thermal overload relay provides dependable protection for single-phase and three-phase motors by interrupting the circuit during overload, phase imbalance, or prolonged overcurrent conditions. Designed to work directly with IEC-style contactors, the FEM3T helps extend motor life, prevent overheating, and reduce equipment downtime in HVAC systems, pumps, compressors, and industrial machinery.
Its adjustable amp setting, trip indicator, and manual/automatic reset options make it a versatile choice for OEMs, panel builders, and maintenance teams needing a reliable replacement overload relay for existing motor starter assemblies.
Click here to see a catalog page of this Allen Bradley 700-FE timing relay
Typical Applications
- Motor protection for pumps, compressors, and fans
- HVAC air-handling units and condenser systems
- Conveyors and light industrial machinery
- Material handling and process equipment
- OEM and commercial control panels
Technical Advantages
- Adjustable current range to match motor full-load amps
- Built-in trip indicator for fast troubleshooting
- Manual or automatic reset configuration
- Direct-mount design for compatible IEC contactors
- Protection against overload, overcurrent, and phase loss
- Long-life bimetallic protection mechanism
Compatibility Notes
The FEM3T is commonly used as a replacement thermal overload relay in IEC motor starter assemblies. It is frequently paired with IEC-style contactors used in commercial HVAC, pumping systems, and industrial machinery. If your existing starter uses an FEM-series overload, the FEM3T typically matches the same frame size, mounting pattern, and trip range.
Frequently Asked Questions
Q: What motors can the FEM3T protect?
The FEM3T protects single-phase and three-phase motors that fall within its adjustable amp rating, providing overload, overcurrent, and phase-loss protection.
Q: How do I confirm the FEM3T is the correct replacement?
Match the relay’s current range, mounting style, and contactor compatibility with your existing equipment. If your current relay is an FEM-series unit, the FEM3T is typically the correct fit.
Q: Does the FEM3T mount directly to a contactor?
Yes. The FEM3T is designed for direct attachment to compatible IEC contactors to create a complete motor starter assembly.
Q: What is the difference between thermal and electronic overload relays?
Thermal overloads like the FEM3T use a bimetal mechanism, while electronic overloads offer higher accuracy, selectable trip classes, and advanced protection features.
Q: Does the FEM3T support both manual and automatic reset modes?
Yes. The FEM3T includes both reset options for flexibility in different control and safety applications.
