Overview
The Allen-Bradley 193-EA1FB is an electronic motor protection solid-state overload relay from the E1 Plus series. This compact 3-pole device delivers precision overload detection through true RMS current measurement on each phase, creating an accurate thermal model of the motor to prevent damage from sustained overloads. Unlike traditional bimetallic relays, the 193-EA1FB uses advanced electronic sensing and thermal modeling for faster response and greater protection accuracy. It is compatible with Bulletin 100-M05 through 100-C23 contactors and integrates seamlessly into Allen-Bradley motor control centers.
Key Features
- Adjustable Current Range: 3.7–12 Amps, accommodating a wide spectrum of motor sizes from fractional to 5 hp at full voltage
- Class 10 Thermal Trip: Default trip class 10 with adjustable range from 5 to 30 for customized motor type protection (standard, high-inertia, high-cycling)
- Phase Loss Protection: Detects and responds to single-phase conditions before motor damage occurs
- Self-Powered Design: Minimal auxiliary voltage requirement; low energy consumption (approximately 150 mW)
- Manual Reset Operation: Operator-initiated reset after trip; includes visible trip indicator for quick status verification
- Auxiliary Contacts: 1 Normally Open (N.O.) and 1 Normally Closed (N.C.) isolated auxiliary contacts for signaling and diagnostics
- Compact 3-Pole Configuration: Optimizes panel space while maintaining full three-phase monitoring
Technical Specifications
- Part Number: 193-EA1FB
- Series: E1 Plus (Bulletin 193)
- Product Type: Solid-State Overload Relay
- Function: Motor Protection
- Adjustment Range: 3.7–12 Amps
- Trip Class: Class 10 (default); adjustable 5–30
- Poles: 3
- Control Voltage: 600 VAC maximum
- Frequency: 50–60 Hz
- Operating Temperature: −20°C to +40°C ambient
- Weight: 0.22 lbs
- Auxiliary Contacts: 1 N.O., 1 N.C. (isolated)
- Reset Type: Manual
- Communication Capable: DeviceNet and EtherNet/IP via optional modules
Typical Applications
- Manufacturing and assembly line motor protection systems
- HVAC and refrigeration motor control
- Conveyor system motor protection
- Motor control centers (MCCs) using Allen-Bradley Bulletin 100 contactors
- Industrial automation systems requiring real-time thermal monitoring and diagnostics
- Logix-based control systems with DeviceNet or EtherNet/IP integration
Compatibility & Replacements
Compatible With
- Allen-Bradley Bulletin 100-M05, 100-M23, 100-C23 contactors
- Rockwell ControlLogix and CompactLogix systems (via optional communication modules)
- Motor control centers (MCCs) with standard mounting provisions
- 3-phase AC motors (fractional to ~5 hp depending on ambient conditions)
- DeviceNet and EtherNet/IP networks (with optional expansion modules)
Replaces / Drop-In Replacement For
The 193-EA1FB replaces earlier non-electronic bimetallic overload relays in similar size and mounting envelope within motor control centers. Verify specific contactor pairing and current range requirements with your system integrator before ordering, as exact mechanical and electrical compatibility depends on panel configuration. The 193-EA1FB is discontinued by the manufacturer; no direct newer equivalent has been published.
Works With
- Studio 5000 (Logix Designer) for configuration and monitoring of DeviceNet/EtherNet/IP versions
- RSView automation software platforms
- DeviceNet protocol for real-time diagnostics and alarm reporting
- EtherNet/IP protocol for integrated Logix architecture systems
- Rockwell Automation FactoryTalk HMI systems (via optional communication modules)
