Overview
The Square D 8736SDO1V03 is a Type S NEMA Size 2 reversing magnetic starter designed for full-voltage starting, stopping, and reversing of AC squirrel-cage motors. This vertical-arrangement unit combines two 8502S NEMA contactors with mechanical and electrical interlocking, plus an integrated melting alloy overload relay. The 240 VAC operating coil makes this starter suitable for distributed control circuits in industrial and commercial motor applications.
Key Features
- NEMA Size 2, 45 ampere continuous rating
- Type S reversing magnetic starter with dual interlocked contactors
- Melting alloy overload relay with Type B thermal units
- 240 VAC 50/60 Hz operating coil (separate control wiring)
- Open-frame design without enclosure; vertical mounting arrangement
- 5 kA Short Circuit Current Rating (SCCR) per UL508A
- UL listed and CSA certified
Technical Specifications
- Ampere Rating: 45 A continuous
- Maximum HP @ 200 VAC: 10 HP
- Maximum HP @ 230 VAC: 15 HP
- Maximum HP @ 460 VAC: 25 HP
- Maximum HP @ 575 VAC: 25 HP
- Voltage Rating: Up to 600 VAC
- Phases: 3-phase AC
- Poles: 3
- Control Coil Voltage: 240 VAC, 50/60 Hz
- Overload Relay Type: Melting alloy with Type B thermal units
- SCCR: 5 kA (when protected by appropriate circuit breaker or fuse)
- Arrangement: Vertical
- Enclosure: Open (no cover)
- Dimensions (H × W × D): 8.50″ × 9.00″ × 6.03″
- Certifications: UL508A, CSA
Typical Applications
NEMA Type S reversing starters are used in:
- Conveyor systems requiring bi-directional operation
- Hoist and crane motor control
- Pump reversing systems
- Fan motor reversal circuits
- General industrial motor starting and reversal
- Textile machinery and production equipment
Compatibility & Replacements
Compatible With
- Standard NEMA Size 2 contactor base and accessories
- Type S NEMA thermal overload relay units
- Square D/Schneider Electric control transformers rated 240 VAC input
- Standard 240 VAC industrial control circuits
- 3-phase AC power distribution systems up to 600 VAC
Replaces / Drop-In Replacement For
- This unit serves as a direct replacement for older 8736SDO1V03 starters in existing installations
- Verify mounting arrangement and coil voltage compatibility before substitution
- Consult your system integrator for alternative NEMA Size 2 horizontal starters (8736SDO2V03 series)
Works With
- Square D Type S NEMA starters and motor control accessories
- Schneider Electric PLC and control systems
- Standard industrial control relays and timers
- Disconnect switches and manual starters rated for NEMA Size 2
- Motor thermal overload relays (Type B thermal elements)
