Overview
The Allen-Bradley 193-EA4CB is a thermal overload relay designed to protect motors and electrical machinery from damaging overload conditions. With its Class 10 trip rating and 0.32–1.0A current range, this relay delivers precise protection in compact form, making it ideal for applications where space is limited and reliable uptime is critical.
Key Features
- Class 10 trip rating for fast, predictable response to sustained overloads
- Adjustable current setting range of 0.32–1.0A covers small to medium motor protection
- Compact design fits standard motor starter and contactor configurations
- Manual reset option for controlled system restart after protection event
- Proven thermal-mechanical design for reliable, long-service-life operation
Technical Specifications
- Model Number: 193-EA4CB
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Current Rating Range: 0.32–1.0A (adjustable)
- Trip Class: Class 10
- Trip Time (at 800% load): Approximately 10 seconds
- Operating Principle: Thermal overload protection
- Reset Type: Manual reset
- Mounting Style: Direct mount to contactor frame
- Dimensions: 7.09 × 6.3 × 8.27 inches (180 × 160 × 210 mm)
- Weight: 1.32 pounds (0.6 kg)
- Certifications: UL 508, CSA C22.2 No. 14, NEMA ICS 2-1993
- Operating Temperature Range: −20 °C to +60 °C (standard)
- Contact Configuration: Normally open (NO) auxiliary contact
Typical Applications
The 193-EA4CB is widely deployed in fractional and small-horsepower motor circuits, including:
- HVAC fan motors and blower controls
- Pump and compressor protection circuits
- Light industrial machinery and assembly line equipment
- Process automation and control system motor branches
- OEM and retrofit motor-starter packages
Compatibility & Replacements
The Allen-Bradley 193-EA4CB is a direct-fit overload relay for NEMA Size 00 and 0 contactors and motor starters within the Allen-Bradley 100, 500, and legacy 700 series families. It coordinates with standard IEC Class 10 thermal elements and is interchangeable with other 193-EA family relays of the same current range and trip class. For specific contactor model compatibility or upgrade paths, consult the device nameplate or contact your distributor. Common companion contactors include the 100-C09, 100-C16, and similar compact contactor frames used in fractional-horsepower applications.
