Overview
The Square D 8502SF02S is a three-pole NEMA Size 4 AC magnetic contactor designed for industrial motor control and switching applications. This Class 8502 Type S contactor features a 120VAC coil rated for 50/60 Hz operation and is built to handle full-voltage, non-reversing motor loads up to 100 horsepower at 480/575V three-phase.
Key Features
- 3-pole, NEMA Size 4 configuration for high-amperage motor control
- 120VAC coil, 50/60 Hz dual frequency operation
- Motor control ratings: 40 HP @ 208V, 50 HP @ 230V, 75 HP @ 380V, 100 HP @ 480/575V (3-phase)
- UL Listed and CSA Certified for North American industrial standards
- Maximum 600V AC operation rating for enhanced flexibility
- Type S design for heating loads, capacitors, transformers, and motors with separate overload protection
Technical Specifications
- Class: 8502 Type S
- NEMA Size: 4
- Number of Poles: 3
- Contact Form: S (Non-Reversing)
- Coil Voltage: 120VAC
- Coil Frequency: 50/60 Hz
- Maximum Voltage Rating: 600VAC
- Series: A
- Certifications: UL, CSA
Typical Applications
The 8502SF02S is ideal for:
- Fixed-speed three-phase motor starting and control
- Heating and cooling load switching in industrial HVAC systems
- Capacitor and transformer bank switching
- Full-voltage AC motor control in manufacturing, petrochemical, and utility applications
- Industrial machinery where separate thermal overload relays provide motor protection
Compatibility & Replacements
Compatible With
- Standard motor control centers (MCCs)
- Three-phase AC power systems rated 208V–600VAC
- Thermal overload relays for combined motor protection packages
- 24V–120V AC control wiring and auxiliary switches
- Industrial automation control circuits requiring non-reversing motor contactors
Replaces / Drop-In Replacement For
- Other Square D 8502SF series contactors with matching coil voltage and pole configuration
- Verify exact replacement compatibility with your control system documentation before ordering
Works With
- Siemens, ABB, Schneider Electric, and other IEC-standard thermal overload relays
- NEMA-rated motor starters and soft-start controllers
- Standard 600V industrial power distribution systems
- Rockwell Automation motor control integration in legacy and modern systems
