CJX2-1210 AC Contactor (3-Pole, 25A, 220VAC Coil)

Key Features

• High-Capacity Switching: Rated for up to 25 Amps, making it ideal for managing the high-current startup loads of compressors and fan motors.
• 3-Pole Design: Features three sets of Normally Open (N.O.) power contacts to switch multiple phases or legs of power simultaneously.
• 220VAC Operating Coil: Designed to be triggered by standard 220V control signals commonly found in industrial and heavy-duty HVAC/R systems.
• Integrated Auxiliary Contact: Includes one built-in Normally Open (1NO) auxiliary contact for signaling, status feedback, or interlocking with other control circuits.
• DIN Rail & Screw Mount: Dual mounting options provide flexibility for installation in standard electrical control boxes or custom enclosures.

Technical Specifications

• Model: CJX2-1210
• Poles: 3-Pole + 1NO (Normally Open) Auxiliary
• Rated Current (AC-3): 12A (General) / 25A Max
• Coil Voltage: 220V AC, 50/60Hz
• Insulation Voltage (Ui): 660V
• Material: Flame-retardant outer shell with high-conductivity silver alloy contacts for long electrical life.

Compatibility & Applications

This contactor is a versatile replacement for motor control and heating systems across various brands. Common applications include:

• HVAC/R: Controlling outdoor condenser units, heat pump compressors, and large refrigeration evaporators.
• Industrial Motors: Starting and stopping 3-phase AC motors in conveyor systems, pumps, and fans.
• Lighting & Heating: Switching high-wattage resistance heaters or large commercial lighting arrays.
• Replacement: Fits many systems requiring LC1-D1210 or equivalent 220V 12A/25A contactors.

When to Replace

• Chattering or Humming: A loud buzzing noise indicates the internal solenoid coil is weak or the contacts are dirty and vibrating.
• Burnt Contacts: Visible blackening or pitting on the contact points, which can cause the motor to "single-phase" and burn out.
• Stuck in "On" or "Off": Contacts have welded shut due to an electrical surge, or the return spring has failed, preventing the circuit from opening.
• Burnt Coil Smell: An acrid odor or visible melting near the A1/A2 terminals indicates the electromagnetic coil has shorted out.

Installation Tips

• Safety First: Turn off all power to the equipment at the main breaker. Verify that no voltage is present with a multimeter before touching terminals.
• Terminal Labeling: Label your wires before disconnecting. L1, L2, L3 are for incoming power; T1, T2, T3 are for the load (motor); and A1, A2 are for the 220V control coil.
• Tight Connections: Ensure all screw terminals are tightened firmly. Loose connections create high resistance, which leads to heat and premature failure.
• Mounting: Use the DIN rail clip for a clean snap-fit or secure the unit to the backplate using the mounting holes to prevent vibration.
• Verification: After installation, ensure the manual override plunger moves freely and isn't obstructed by any stray wire strands.