Overview
The Furnas 42CF15AJ definite purpose contactor is a Class 42 switching device engineered for industrial HVAC, refrigeration, and pump control applications. This 2-pole, 40 amp unit combines reliable electrical switching with straightforward installation, making it a field-proven replacement for legacy and modern definite purpose control systems.
Key Features
- 40 amp continuous rating in 2-pole configuration
- 24V AC 50/60 Hz coil voltage for standard control circuit compatibility
- Double quick-connect terminals for tool-free wire attachment
- Metal base plate for secure DIN rail or surface mounting
- Class 42 definite purpose design optimized for non-inductive loads
- Wide availability as NOS (new old stock) and refurbished units
Technical Specifications
- Electrical Rating (FL): 40 amps
- Electrical Rating (RES): 50 amps
- Pole Configuration: 2-pole
- Coil Voltage: 24V AC (50/60 Hz)
- Terminal Type: Quick-connect
- Mounting: Metal base plate
- Contactor Class: Class 42 (Definite Purpose)
- Enclosure Type: Open
Typical Applications
The Furnas 42CF15AJ is widely deployed in:
- HVAC Systems — Air conditioning units, rooftop packaged systems, heat pumps
- Refrigeration — Walk-in coolers, commercial display cases, condenser fan switching
- Pump Control — Centrifugal pumps, circulation systems, sump pump starters
- Fan/Blower Applications — Ventilation fans, exhaust systems, air handler controls
- Industrial Load Switching — Non-inductive and resistive load circuits up to 40 amps
Compatibility & Replacements
Compatible With
- Standard 24V AC control circuits (50/60 Hz)
- NEMA and IEC-adjacent control systems
- DIN rail and surface-mount installations
- Quick-connect termination blocks
Replaces / Drop-In Replacement For
- Furnas 42BF15AJ (open enclosure, 2-pole, 40A)
- Legacy CDM40C2 controllers (where coil voltage matches)
- Other Class 42 2-pole 40A definite purpose contactors with 24V coils
Works With
- 24V AC control relays and timers
- HVAC thermostats and occupancy sensors
- Motor starters and soft-start drives (as a load-side contactor)
- PLCs and industrial controllers via 24V output modules
