8501CO8V04 - Square D Power Relay

8501CO8V04 - Square D Power Relay

The 8501CO8V04 is a Type C power relay used for switching small single-phase motors and other light loads. You’ll usually see it in control panels for heaters, pumps, or conveyor systems—especially where the original specs need to be matched. It’s a SPST relay with one normally closed contact, so the circuit stays closed until the coil is energized. The 277V AC coil is standard in a lot of commercial setups, so it tends to drop in without much trouble. On the load side, it’s rated 30 amps resistive at 300 VAC and can handle up to 2 HP motors. The design is simple. Open frame, so you can see what’s going on. Screw terminals, so wiring is straightforward. It mounts to a panel and does what it’s supposed to do. No extra parts, no guesswork—just a direct replacement when you need this exact setup.

Key Features and Benefits

• SPST with 1 normally closed (NC) contact
• 277 VAC coil – common in commercial systems
• 30A resistive rating (300 VAC)
• Handles small motors up to 2 HP
• Open frame design for easy inspection
• Panel mount with screw clamp terminals

Technical Specifications

• Series: 8501C
• Type: C Power Relay
• Contacts: SPST, 1 NC
• Current: 30A
• Coil Voltage: 277 VAC, 60 Hz
• Motor Rating: 2 HP
• Max Voltage: 600 VAC
• Phase: Single-phase
• Wire Size: AWG 10 copper
• Terminal Torque: 11–15 lb-in
• Mounting: Panel
• Size: 2.43" x 2.5" x 2.25"
• Temp Range: -22°F to 122°F

Material Compliance and Certifications

• UL Listed (E78351)
• CSA Certified
• CE Marked
• Meets standard safety requirements for use in industrial and commercial equipment .

Where It Works Best

• Heater controls
• Pump systems
• Conveyor equipment
• Material handling
• General control panels