COOPER+ AAP3798102-00037 | Thermal Overload Relay

​Parameter ​Specification
​Product Model AAP3798102-00037
​Manufacturer Cooper (Eaton)
​Type Thermal Overload Relay
​Current Range 6-25 A (adjustable)
​Rated Motor Power Up to 25 HP @ 480V AC
​Trip Class Class 10 (meets NEMA MG-1)
​Reset Mode Manual/Auto selectable
​Auxiliary Contacts 1NO + 1NC (5A @ 600V)
​Housing Glass-reinforced polyester, NEMA 4X/IP66
​Environmental -40°C to +70°C, 95% RH non-condensing
​Mounting DIN rail or direct to contactor
​Isolation Voltage 600V AC
​Standards UL 508, IEC 60947-4-1, CSA C22.2
​Connection Type Screw terminals (AWG 14-8)
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Description

Product Overview
The ​COOPER+ AAP3798102-00037 is an industrial-grade thermal overload relay designed to protect motors and electrical circuits from overcurrent, phase loss, and phase imbalance in harsh operational environments. Part of Cooper’s advanced Crouse-Hinds series, this relay combines precision bimetal trip technology with robust NEMA 4X/IP66-rated housing, ensuring reliable operation in dust, moisture, and corrosive conditions. Featuring adjustable trip settings (80-125% of rated current) and manual/auto reset options, the ​AAP3798102-00037 provides tailored protection for motors up to 25 HP. Its dual-certified design (UL 508/60947-4-1 and IEC 60947-4-1) enables global deployment across automation systems, while auxiliary contacts facilitate seamless PLC integration for predictive maintenance.

Technical Specifications

​Parameter ​Specification
​Product Model AAP3798102-00037
​Manufacturer Cooper (Eaton)
​Type Thermal Overload Relay
​Current Range 6-25 A (adjustable)
​Rated Motor Power Up to 25 HP @ 480V AC
​Trip Class Class 10 (meets NEMA MG-1)
​Reset Mode Manual/Auto selectable
​Auxiliary Contacts 1NO + 1NC (5A @ 600V)
​Housing Glass-reinforced polyester, NEMA 4X/IP66
​Environmental -40°C to +70°C, 95% RH non-condensing
​Mounting DIN rail or direct to contactor
​Isolation Voltage 600V AC
​Standards UL 508, IEC 60947-4-1, CSA C22.2
​Connection Type Screw terminals (AWG 14-8)

Key Features & Advantages

Precision Protection

  • Phase loss/imbalance detection (<2-sec response) prevents motor burnout
  • Ambient temperature compensation (±5% accuracy) for consistent tripping
  • Visual trip indication and mechanical reset lockout

AAP3798102-00130

Operational Resilience

  • Salt-spray tested per ASTM B117 (500+ hours)
  • UV-resistant housing for outdoor installations
  • Explosion-proof options (Class I Div 2/Zone 2) available

Integration Efficiency

  • Tamper-proof current setting dial with tactile feedback
  • Plug-in auxiliary contacts reduce wiring time by 40%
  • Compatible with Eaton C25 contactors and IEC starters

Maintenance Optimization

  • Test button simulates overload conditions
  • Trip memory function aids root-cause analysis
  • External trip reset via push rod for enclosed cabinets

Application Areas

  • ​HVAC Systems: Protection of centrifugal chillers and cooling tower fans
  • ​Water Treatment: Motor safeguarding in pump stations with variable loads
  • ​Material Handling: Conveyor drive overload prevention in mining operations
  • ​Food Processing: Washdown-duty protection for mixers/pumps (USDA compliant)
  • ​Manufacturing: CNC machine tool motor circuits with phase monitoring
  • ​OEM Machinery: Integrated motor starters for compressors/crushers

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