3 Pole Definite Purpose Contactor for HVAC and Refrigeration
The Shopcorp SHDY3XU12JS is a 3 pole normally open definite purpose contactor designed for compatible high-current HVAC, refrigeration, heat pump, compressor, motor, pump, and control-panel applications.
It is rated for 120 FLA motor loads, 150A resistive loads, and operation in systems up to 600VAC maximum.
The contactor uses a 208/240VAC, 50/60Hz control coil, making it suitable for equipment with a compatible control circuit.
208/240VAC Coil
The coil operates at:
- 208/240VAC
- 50/60Hz
Coil terminals are:
A1
A2
When the coil receives the proper control voltage, the three normally open main contacts close together.
The coil voltage must match the control voltage supplied by the connected equipment.
3 Pole Normally Open Power Contacts
The main terminals are arranged as:
- Line Side: L1, L2, L3
- Load Side: T1, T2, T3
Each pole remains open when the coil is not energized.
When the coil is energized:
- L1 connects to T1
- L2 connects to T2
- L3 connects to T3
This configuration supports compatible three-pole switching applications.
120 FLA Motor Rating
The contactor is rated for 120 Full Load Amps (FLA).
FLA refers to the current drawn by a motor under its rated operating load and should not be confused with the resistive current rating.
Motor selection should be based on:
- Motor voltage
- Motor horsepower
- Full-load current
- Locked rotor current
- Equipment manufacturer requirements
- Applicable electrical codes
150A Resistive Rating
For compatible resistive loads, the contactor is rated up to 150A.
The resistive rating should not be used as the motor-load rating. For motor applications, use the published motor and horsepower ratings.
Motor Horsepower Ratings
Published horsepower ratings include:
120VAC, 1 Phase: 7.5 HP
240VAC, 1 Phase: 20 HP
240VAC, 3 Phase: 30 HP
480VAC, 3 Phase: 50 HP
600VAC, 3 Phase: 50 HP
These ratings should be considered together with the motor's FLA and locked rotor characteristics.
Locked Rotor Ratings
120VAC: 720A
240VAC: 720A
480VAC: 600A
600VAC: 480A
These ratings are especially important for compressors, motors, pumps, and other loads that can draw high current during startup.
HVAC, Compressor and Heat Pump Applications
Suitable applications include:
- Central air conditioning systems
- HVAC condensing units
- Hermetic refrigeration compressors
- Heat pumps
- Refrigeration equipment
- Pumps
- Motors
- Commercial HVAC equipment
- Industrial control panels
Final compatibility depends on the connected equipment's electrical ratings and control requirements.
Copper Lug and Quick-Connect Terminals
The contactor uses copper-compatible lug terminals for the main power connections and quick-connect terminals for compatible control wiring.
Main lug capacity: #14 to 1/0 copper conductors
The product also includes dual 1/4-inch quick-connect terminals for compatible connections.
Terminal Torque
For copper conductors rated 75°C:
Screws: 50 in-lb
Lugs: 60 in-lb
Proper conductor preparation and terminal torque are important for reliable electrical connections.
Panel Mount Design
The contactor is intended for panel-mounted installation inside compatible HVAC equipment and electrical enclosures.
Overall dimensions are approximately:
134 × 86 × 111 mm
5.3 × 3.4 × 4.4 in
Mounting-hole spacing is approximately:
113 mm vertical
64 mm horizontal
UL Recognized and A2L Certified
The SHDY3XU12JS is a UL Recognized Component.
UL File: E246810
A2L Certified: LZGH2/8
The product is intended for use as a component within properly designed and evaluated HVAC, refrigeration, and electrical equipment.
Installation Considerations
Before installation, verify:
Coil voltage
System voltage
Motor FLA
Locked rotor current
Horsepower
Resistive load rating
Conductor size
Terminal torque
Mounting dimensions
Equipment manufacturer requirements
Applicable electrical codes
Installation should be performed by qualified personnel familiar with HVAC and electrical control equipment.
