Overview
The Cutler-Hammer BA13A thermal overload relay is a three-pole, starter-mounted motor protection device built for A200 series motor starters. This Type B, Class 20 thermal relay employs bimetallic elements and precisely calibrated heaters to detect and interrupt motor overload conditions. With a full load amperage range of 0.25–26.2A, the BA13A accommodates small fractional-horsepower through medium industrial motors and is suitable for both single-phase and three-phase applications.
Key Features
- Type B Bimetallic Design: Modern block-style construction with ambient compensation for reliable overload detection across temperature ranges.
- Class 20 Trip Timing: Industry-standard Class 20 characteristic ensures predictable trip curves and coordination with other protective devices.
- 0.25–26.2A Adjustable Range: Single unit covers wide motor FLA spectrum, reducing inventory needs.
- Starter-Mounted Installation: Bolts directly to A200 motor starters for space-efficient control panel design.
- 1NC Auxiliary Contact: Normally closed contact supports remote signaling and interlock logic.
- Manual Reset: Field-settable overload protection with manual trip reset for operator control.
- UL-Listed & CSA Certified: Meets North American safety standards for industrial use.
Technical Specifications
- Manufacturer: Eaton Cutler-Hammer
- Part Number: BA13A
- Series: A200 Motor Starter
- Relay Type: Thermal Type B, Bimetallic
- Poles: 3-Pole
- Full Load Current Range: 0.25–26.2A (adjustable)
- Contact Rating: 600V AC
- Auxiliary Contact: 1NC (Normally Closed)
- Trip Class: Class 20
- Mounting Type: Starter-Mounted
- Reset Type: Manual
- Ambient Compensation: Yes
- Dimensions: 3.4 x 3.6 x 4.8 inches (HxWxD)
- Weight: 0.7 lbs
- Certifications: UL Listed, CSA Certified
Typical Applications
The BA13A is engineered for motor and power control equipment in:
- Industrial pump drives and compressor motors
- HVAC systems and circulation fans
- Manufacturing assembly lines and conveyor systems
- Machine tool control circuits
- Commercial duty motor starters (fractional through 15 hp range)
- Single-phase and three-phase motor protection
Compatibility & Replacements
Compatible With
- Eaton/Cutler-Hammer A200 motor starters and contactors
- Type B thermal overload trip units for NEMA motor control
- Industrial motor control circuits rated 600V AC
- Manual motor starters with A200 mounting interface
Replaces / Drop-In Replacement For
The BA13A directly replaces earlier versions and Type B designs in the Cutler-Hammer A200 lineup. Verify mounting footprint and terminal configuration with your existing starter before ordering. For specific cross-references, consult your system integrator or Eaton documentation.
Works With
- NEMA-style motor starter control logic
- Manual and electromagnetic A200 starters
- Class 20 overload coordination curves
- Standard 120V/240V/480V motor control circuits
