Overview
The Square D 8536 SDG1 is a industrial-grade NEMA Size 2 motor starter engineered for full-voltage starting and stopping of AC squirrel-cage motors in manufacturing and automation environments. With a 45-ampere line rating and 600 VAC system voltage capability, this Type S non-reversing starter (Series A) provides dependable motor control for horsepower ratings up to 25 HP at 460/575 VAC. The unit features a separate control design (Form S) with screw-clamp electrical connections and is suitable for surface mounting in NEMA 1 enclosures.
Key Features
- 45-Ampere Line Rating: 3 pole NEMA Size 2 non-reversing starter with 45 ampere rating
- Motor Ratings: 10 HP at 200 VAC, 15 HP at 230 VAC and 25 HP at 460 and 575 VAC
- Non-Reversing Type S Design: Type S NEMA motor starters are used for full voltage starting and stopping of AC squirrel cage motors
- Standard Overload Protection: Melting alloy type overload relay that uses Type B thermal units to sense over current conditions
- Short Circuit Rating: 5 kA maximum SCCR (Short Circuit Current Rating) per UL508A when protected by an appropriate circuit breaker or fuse
- Flexible Coil Options: Available with replaceable coils in a wide variety of voltages
Technical Specifications
The 8536 SDG1 combines robust construction with standard industrial electrical ratings:
- Class: 8536 (Magnetic Motor Starter)
- Type: SDG / Form S (Separate Control Unit)
- NEMA Size: 2
- Poles: 3
- Phase: 3-phase
- Line Current Rating: 45 Amps
- System Voltage: 600 VAC
- Overload Type: Thermal (Type B units with melting alloy relay)
- Electrical Connection: Screw-clamp terminals
- Enclosure Rating: Not rated (open device); suitable for NEMA 1 surface-mounted enclosures
- Manufacturing Origin: United States
Typical Applications
The Square D 8536 SDG1 starter is widely deployed in:
- Pump and compressor motor control in facilities management
- Machine tool and manufacturing equipment motor circuits
- HVAC and industrial process motor starting
- OEM equipment and panel builders requiring NEMA-rated starters
- Retrofit and replacement installations in existing control systems
Compatibility & Replacements
Compatible With
- AC squirrel-cage induction motors rated 10–25 HP (depending on line voltage)
- 600 VAC three-phase industrial power systems
- Thermal overload heater packs (Type B units) in the 15A–45A range
- Standard industrial motor control circuits using separate control units
- NEMA 1 and open-mounting enclosure installations
Replaces / Drop-In Replacement For
- Square D 8536 SDG1 variants with different coil voltages (8536SDG1V02, 8536SDG1V03, 8536SDG1V06, etc.)
- Other Square D Class 8536 Type S non-reversing starters in NEMA Size 2
- Verify the coil voltage, series designation, and thermal unit range match your application before installing
Works With
- Separate control circuit supplies (110/120 VAC, 220/240 VAC, or other coil voltages as rated on the unit)
- Standard industrial push-button stations and selector switches
- Overload relay heater packs rated for 15–45 amperes
- Motor circuit branch protection via circuit breakers or fuses (5 kA SCCR minimum recommended)
- Manual or automated starter controls in plant-floor automation systems
