8903SQO3V02 - Square D Lighting Contactor

8903SQO3V02 - Square D Lighting Contactor

When you're dealing with large lighting loads, you need a contactor that simply does its job—no surprises, no inconsistency. The 8903SQO3V02 Type S electrically held lighting contactor is built for that kind of reliability. Rated for 100 amps, this 4-pole unit with four normally open contacts gives you steady, controlled switching for commercial and industrial lighting systems.

This model uses an electrically held design, meaning it stays engaged as long as control voltage is applied. That’s useful in applications where lighting needs to remain on continuously without interruption. It comes with a 110/120V AC coil (50/60 Hz) installed, and if your setup changes, the interchangeable coil design makes it easy to adapt to other voltages up to 600 VAC.

The open-style construction keeps installation flexible, whether you're working on a new panel or replacing an existing unit. And with UL Listing and CSA Certification, you’re getting a contactor that meets recognized safety standards—something you don’t want to compromise on.

Key Features and Benefits

• Electrically held operation keeps circuits engaged while voltage is applied
• 100 amp rating supports demanding lighting loads
• 4-pole configuration with four normally open contacts
• Includes 110/120V AC coil (50/60 Hz)
• Interchangeable coils available for different voltage requirements
• Open design allows for flexible panel installation
• Replacement contact kits available for maintenance
• Compatible with Type S accessories for added functionality

Technical Specifications

• Catalog Number: 8903SQO3V02
  
• Type: Electrically Held Lighting Contactor
  
• Series: Type S
  
• Current Rating: 100A
  
• Poles: 4
  
• Contact Type: 4 Normally Open (NO)
  
• Control Voltage: 110/120V AC, 50/60 Hz
  
• Connections: Lugs
  
• Dimensions:
  • Height: 7.2 in
  • Width: 9.8 in
  • Depth: 6.5 in
• Enclosure: Open (no enclosure)
  
• Auxiliary Contacts: None
  
• Pilot Light: No
  

Material Compliance and Certifications

• UL Listed
• CSA Certified
• TAA Compliant
• Manufactured to meet established North American safety and performance standards

Where It Works Best

• Commercial buildings with centralized lighting control
• Warehouses and distribution centers
• Parking garages and outdoor lighting systems
• Schools, campuses, and municipal facilities
• Industrial environments requiring continuous lighting operation
• Custom control panels and retrofit installations