Overview
The Square D 8536SE02S is a NEMA Size 3 Type S magnetic motor starter designed for industrial motor control applications. This non-reversing starter is rated for 20–50 horsepower motors and is equipped with a 110-120V AC operating coil for separate control circuits. Built to proven Square D standards, this unit delivers reliable full-voltage starting and stopping of AC squirrel cage motors in manufacturing, HVAC, and process automation environments.
Key Features
- Full-voltage (across-the-line) starter for AC squirrel cage motors
- NEMA Size 3 rated for 20–50 HP motor applications
- Melting alloy type overload relay with Type B thermal units for motor protection
- 110-120V AC 50/60 Hz operating coil with separate control wiring
- Non-reversing, single-direction motor control
- Trip-free construction with push-to-test manual override and visible trip indicator
- Heavy-duty contacts with angled design for positive seating and long service life
- UL listed and CSA certified for North American industrial installations
Technical Specifications
- Horsepower Rating: 20–50 HP (3-phase motors at multiple voltage ratings)
- NEMA Enclosure: Open device (no enclosure included)
- Number of Poles: 3
- Coil Voltage: 110-120V AC, 50/60 Hz
- Maximum Overload Current: Up to 90 amperes AC
- System Voltage: 600V AC maximum
- Overload Protection: Melting alloy thermal relay, Type B thermal units
- Control Type: Non-reversing, full-voltage
- Mounting: Open frame, surface-mount compatible
- Operating Temperature: General purpose (indoor) applications
- Certifications: UL 508A (5 kA maximum SCCR), CSA Certified
Typical Applications
- Pump and compressor motor starting in industrial facilities
- HVAC system fan and chiller motor control
- Manufacturing equipment and production line motor circuits
- Water treatment and wastewater process automation
- Machine tool motor control circuits requiring reliable full-voltage starting
- Facility maintenance and retrofit installations where space is limited
Compatibility & Replacements
Compatible With
- Square D control systems and enclosures
- Thermal overload relay assemblies (melting alloy Type B units)
- Standard push-button stations and pilot control devices
- General purpose motor starter applications (NEMA Class 8536)
- 600V AC three-phase distribution systems
Replaces / Drop-In Replacement For
- Earlier Square D Type S starters with equivalent NEMA Size 3 ratings
- Other full-voltage NEMA 3 non-reversing starters requiring similar HP and voltage specifications
- Verify exact compatibility with your original equipment specifications before installation
Works With
- Melting alloy thermal overload units (Type B and Class 20 thermal protection)
- Square D control accessories and interlock components
- Standard industrial three-phase 480V, 460V, 240V, 208V, and 230V power supplies
- Manual and automated motor control circuits
- 50/60 Hz AC electrical systems
