Overview
The Square D 8536SCO3 is a NEMA Size 1 Class 8536 magnetic motor starter designed for full-voltage starting and stopping of AC squirrel cage motors in industrial applications. This 3-pole starter is rated at 27 AMPS with horsepower ratings of 7.5 H.P. @ 230 volt / 10 H.P. @ 460 volt 3 Phase. Built by Square D (Schneider Electric), this starter delivers proven performance in manufacturing, HVAC, and process control environments.
Key Features
- Used for full voltage starting and stopping AC squirrel cage motors
- Motor overload protection provided by melting alloy type thermal overload relays
- Separate control design with 110/120 VAC 50/60 Hz operating coil
- Non-reversing Type S configuration for simple on/off motor control
- 5 kA maximum SCCR (Short Circuit Current Rating) per UL508A
- Open device design without enclosure — integrate into existing control panels
Technical Specifications
Rated for operation at 600 Volts AC, 50-60 Hertz. Dimensions: 6.77 inches tall, 3.50 inches wide, 4.22 inches deep. Screw clamp electrical connections allow straightforward wiring integration. Interchangeable thermal units are available in standard trip (Class 20), quick trip (Class 10), and slow trip (Class 30) to match specific load protection requirements.
Typical Applications
The Square D 8536SCO3 suits fixed-speed motor applications requiring robust electromagnetic contacting and overload sensing. Common uses include pump motors, fan drives, compressor starting, and industrial mixer control. This NEMA Size 1 starter handles motors in the 7.5–10 HP range at standard industrial voltages, making it ideal for retrofit installations where original motor control equipment is worn or obsolete.
Compatibility & Replacements
Compatible With
- AC squirrel cage induction motors, single and three-phase
- Standard industrial motor control circuits rated 600V AC or below
- Control circuits using 110/120 VAC coil supply (50/60 Hz)
- Thermal overload relay setups using standard thermal units
- Existing NEMA Size 1 mounting and panel layouts
Replaces / Drop-In Replacement For
- Alternative Part Number: 84511
- Other Square D Class 8536 Type SCO starters in NEMA Size 1 configuration
- Older magnetic starters with equivalent 27A, 3-pole, 600V ratings
Works With
- Square D thermal overload relay units (standard, quick-trip, and slow-trip options)
- Manual or programmable logic controller (PLC) motor starting circuits
- Standard industrial control relays and push-button stations
- UL 508 listed control panel assemblies
