8501CO15V04 - Square D Power Relay

8501CO15V04 - Square D Power Relay

When you’re dealing with control circuits, you don’t need guesswork—you need a relay that fits, wires up cleanly, and does its job every time. The 8501CO15V04 power relay is built for exactly that. It’s part of the long-standing 8501C series and is commonly used to control small single-phase motors and light electrical loads in everyday industrial setups. This model uses a single-pole double-throw (SPDT) contact arrangement, giving you both a normally open and normally closed contact in one unit. That makes it useful in a range of control schemes without overcomplicating things. The 277 VAC coil is a key detail—it’s meant to match existing systems that already run on that control voltage. In terms of capacity, it handles up to 30 amps resistive at 300 VAC and supports motor loads up to 2 horsepower. That puts it right in the sweet spot for applications like heaters, pumps, conveyors, and material handling equipment. The open-frame design keeps it accessible for inspection, and the screw terminals make installation with standard copper wiring. It’s a simple component—but it’s built to last, and that’s exactly what matters when you’re keeping equipment up and running.

Key Features and Benefits

• SPDT contact setup (1 normally open / 1 normally closed)
• Rated for 30A resistive loads at 300 VAC
• Handles single-phase motors up to 2 HP
• 277 VAC coil for common industrial control circuits
• Open-frame construction for easy visibility and access
• Screw clamp terminals for solid, secure connections
• Panel-mount design that fits into existing layouts
• Designed for long-term, everyday use

Technical Specifications

• Product Type: Power Relay
• Series: 8501C (Type C)
• Catalog Number: 8501CO15V04
• Contact Configuration: SPDT (1 NO / 1 NC)
• Rated Current: 30A
• Coil Voltage: 277 VAC, 60 Hz
• Maximum Voltage: 600 VAC
• Horsepower Rating: Up to 2 HP
• Phase: Single-phase
• Terminal Type: Screw clamp
• Wire Size: Up to AWG 10 copper
• Torque Range: 11–15 lb-in
• Coil Burden: 10 VA
• Mounting: Panel mount
• Dimensions: 2.43 in (H) x 2.5 in (W) x 2.18 in (D)
• Operating Temperature: -22°F to 122°F

Material Compliance and Certifications

• UL Listed (File E78351)
• CSA Certified
• CE Marked
• These certifications indicate the relay meets widely accepted safety and electrical standards for industrial use.

Where It Works Best

• This relay is a good fit anywhere you need dependable switching without going oversized:
• Electric heating systems
• Pump controls
• Conveyor lines
• Material handling equipment
• General control panels