Overview
The Square D 8903-SMG-2 /A is a Class 8903 electrically held lighting contactor rated for 30A with a 3-pole, 3PST-NO contact configuration. This unit features a 110/120V AC coil voltage and surface-mount style installation, making it suitable for integration into existing lighting control enclosures and panelboards. The contactor provides reliable switching for general-purpose lighting circuits in commercial and industrial applications.
Key Features
- Electrically held design with 110/120V AC operating coil voltage
- 30A rated capacity with 3-pole, 3PST-NO contact configuration
- Surface-mount installation compatible with Square D panelboards
- UL Listed and CSA certified for safety and standards compliance
- Compact footprint: 6″ L × 5″ H × 4.5″ W for space-efficient installation
Technical Specifications
- Contact Configuration: 3PST-NO (3-Pole, Single-Throw, Normally Open)
- Coil Voltage: 110/120V AC, 60 Hz
- Rated Current: 30A
- Contact Type: Electrically held (Type S)
- Dimensions: 6″ Length × 5″ Height × 4.5″ Width
- Installation Type: Surface-mount / Enclosure-mount
- Series: Class 8903 Type S (Multipole)
- Standards: UL Listed, CSA Listed
Typical Applications
The Square D 8903-SMG-2 is commonly used for:
- Commercial lighting control in office buildings, retail spaces, and facilities
- Retrofit and replacement projects in existing lighting panels
- Industrial facility lighting circuits requiring remote or timer-based control
- HVAC and general-purpose motor control applications up to 30A
- Energy management systems where automatic switching is required
Compatibility & Replacements
Compatible With
- Square D Type 3, 12, and 3R enclosures
- Square D Panelboards with 31041-400-A2 trim kit compatibility
- Standard 110/120V AC control power systems
- Class 8903 auxiliary contact blocks and accessory modules
Replaces / Drop-In Replacement For
- Class 8903-SMG-2 (base model without suffix)
- Mechanically equivalent to other 30A, 3-pole, 110/120V coil contactors in the 8903 series
- Verify compatibility with your system integrator before ordering for critical replacement applications
Works With
- Class 9999 push button control kits and selector switches
- Time-clock controllers and photoelectric controls
- Standard AC pilot control circuits and relay logic
- Square D modular enclosure systems and bus structures
