Overview
The Square D 8702-SAO4 S B is a NEMA Size 00 Type S reversing magnetic contactor engineered for motor control applications requiring forward and reverse switching. NEMA Class 8702 reversing contactors consist of two mechanically and electrically interlocked contactors that provide safe motor reversal control. This unit is rated for 600 Vac maximum operation at 50–60 Hz.
Key Features
- NEMA Size 00 frame with 9-ampere continuous current rating
- Type S reversing configuration for bidirectional motor control
- Mechanical and electrical interlock to prevent simultaneous forward/reverse contaction
- 600 Vac maximum rated operation at 50–60 Hz
- Separate control coil (Form S) for independent circuit isolation
- Compact open-type design suitable for retrofit and replacement applications
Technical Specifications
- NEMA Size: 00
- Contactor Class: 8702
- Type: S (Reversing)
- Continuous Current Rating: 9 A
- Maximum Voltage: 600 Vac
- Frequency: 50–60 Hz
- Form: S (Separate Control)
- Enclosure Type: Open
- Mounting: NEMA standard panel mounting
- Poles: 3 (for motor winding control)
Typical Applications
The Square D 8702-SAO4 S B reversing contactor is widely used in motor control circuits where bidirectional operation is required. Common applications include:
- Fractional and small integral horsepower motor reversing controls
- Lifting equipment and hoist operations
- Conveyor systems with directional control
- Industrial machinery requiring start/stop/reverse functions
- Replacement of field-failed 8702 reversing contactors
Compatibility & Replacements
Compatible With
- NEMA 1, NEMA 3R, NEMA 12, and NEMA 4X electrical enclosures
- 600 Vac motor control circuits
- Mechanical overload relay packages (Form H modifications available)
- Auxiliary contact kits for circuit interlocking
- Standard DIN-rail or panel-mounted control systems
Replaces / Drop-In Replacement For
- Earlier Square D Class 8702 Type S Size 00 reversing contactors with matching coil voltage codes
- Equivalent NEMA Size 00 reversing contactors where form factor and voltage match
- Verify compatibility with your system integrator before ordering to confirm coil voltage and auxiliary contact configurations match your circuit requirements
Works With
- Square D motor starters and control packages (8502 forward contactors)
- Mechanical and solid-state overload relays
- Manual and pushbutton control stations
- Pilot devices and interlocking contacts
- Standard industrial control transformers and power supplies
