Overview
Square D 8536SCO3 NEMA Size 1 magnetic motor starters deliver dependable full-voltage starting and stopping for three-phase AC squirrel cage motors. This NEMA Size 1 3-pole starter is rated at 27 AMPS with an AC rated coil, making it ideal for industrial equipment control. Motor overload protection is provided by melting alloy type thermal overload relays, ensuring safe motor operation under load conditions.
Key Features
- Rated at 27 AMPS with 7.5 H.P. @ 230 volt / 10 H.P. @ 460 volt 3 Phase capacity
- Three-pole design for full-voltage AC motor control
- Melting alloy type thermal overload relays for motor protection
- Type S starters designed for operation at 600 Volts AC, 50-60 Hertz
- Series A construction with proven reliability in industrial environments
- Interchangeable thermal units available in standard trip (Class 20), quick trip (Class 10), and slow trip (Class 30)
Technical Specifications
- Poles: 3-pole
- Amperage Rating: 27 AMPS
- Voltage Rating: Up to 600V AC
- Horsepower Rating: 7.5 HP @ 230V / 10 HP @ 460V, 3-phase
- Frequency: 50–60 Hz
- Motor Control Type: Full-voltage starting and stopping
- Overload Protection: Melting alloy thermal overload relay (standard)
- NEMA Rating: Size 1
- Series: A
- Short Circuit Current Rating: Up to 100 kA SCCR (per UL508A)
- Enclosure Type: Open
Typical Applications
The Square D 8536SCO3 is widely used in motor control systems including:
- HVAC equipment and ventilation systems
- Pump and compressor starter circuits
- Machine tool motor control
- Industrial fan and blower applications
- General-purpose three-phase motor starting and stopping
- Equipment where reliable, proven motor control is required
Compatibility & Replacements
Compatible With
- Three-phase AC squirrel cage motors rated for full-voltage starting
- Standard industrial motor control circuits and panels
- Thermal overload heater elements (Class 20, 10, and 30 available)
- Motor Logic overload relays with 9A to 27A range
- NEMA Size 1 control enclosures and mounting configurations
Replaces / Drop-In Replacement For
- Previous generation Square D 8536 Series starters of equivalent rating
- Verify your specific model variant before ordering; coil voltage configurations vary by submodel
Works With
- Melting alloy thermal overload relay systems
- Motor Logic overload protection
- Replaceable coil assemblies in multiple voltage ratings
- Standard NEMA Size 1 auxiliary contact blocks
- Industrial control voltage supplies (120V, 240V, 480V coil options)
