Overview
The Furnas 45GG10AJA is a Class 45 definite purpose contactor designed for single-pole control in HVAC and air conditioning applications. Rated at 40 amps with a 24V AC coil (50/60Hz), this contactor delivers reliable switching for both residential and light commercial systems. Now marketed under the Siemens brand (which acquired Furnas), the 45GG10AJA maintains the proven reliability and durability that has made Furnas a trusted name in motor control for decades.
Key Features
- 1-Pole with Shunt Bar: Compact design with integrated shunt for single-pole applications
- Silver Cadmium Oxide Contacts: Weld-resistant, durable contacts rated for Class 45 duty
- Enclosed Body and Coil: Protective enclosure with quiet operation and visual contact position indication
- Multiple Termination Options: Screw terminals and quick connects for flexible installation
- Durable Metal Back Plate: Supports universal mounting configurations
- Class F Coil Insulation: Enhanced thermal stability during extended operation
Technical Specifications
- Part Number: 45GG10AJA
- Manufacturer: Furnas / Siemens
- Poles: 1-Pole with Shunt
- Full Load Amps (FLA): 40A
- Coil Voltage: 24V AC, 50/60Hz
- Contact Type: Silver Cadmium Oxide
- Certifications: UL Listed (UL File E14900), cRUus, ARI 780 & 790
- Coil Insulation: Class F
- Mount Type: Surface Mount, DIN Rail Compatible
- Enclosure Style: Enclosed Body and Coil with Standard Cover
Typical Applications
The Furnas 45GG10AJA is widely used in:
- Air conditioning and heat pump compressor control
- Residential and light commercial HVAC systems
- Refrigeration unit motor switching
- Definite purpose motor control circuits
- Replacement for existing Class 45 control systems
Compatibility & Replacements
Compatible With
- Siemens Energy & Automation Class 45 control systems
- Standard 24V AC control circuits
- HVAC equipment using definite purpose contactors
- Systems requiring single-pole switching with shunt bar
- UL-Listed motor control enclosures
Replaces / Drop-In Replacement For
- Furnas 45FG10AJA (earlier designation)
- Siemens 45GG10AJA (OEM equivalent)
- Schneider Electric / Square D 8910DP41V14
- Eaton / Cutler Hammer C25CNB140T
- GE CR453CD3HAA
- Allen-Bradley 400-DP40NJ1
Works With
- Class 45 definite purpose motor control circuits
- Standard 24V AC control power supplies
- Push-to-test and diagnostic buttons
- Auxiliary contact applications and interlocks
- Thermal overload relays and safety devices in motor starters
