Overview
The Square D 8502-SB0 2 is a Class 8502 Type S full-voltage non-reversing magnetic contactor designed for industrial motor control and automation applications. This NEMA Size 0 contactor delivers reliable switching performance with a 3-pole configuration and 18-ampere load rating, compatible with a wide range of motor and heating loads where separate overload protection is provided.
Key Features
- NEMA Size 0 Classification: 3 HP at 200 and 230 VAC and 5 HP at 460 and 575 VAC ratings
- Type S Non-Reversing Design: Used to switch heating loads, capacitors, transformers, and electric motors where overload protection is provided separately
- 18-Ampere Rating: 3 pole NEMA Size 0 non-reversing contactor has an 18 ampere rating
- High Short-Circuit Rating: 100 kA maximum SCCR rating per UL508A when protected by an appropriate circuit breaker or fuse
- Separate Control Circuit: 110/120 VAC 50/60 Hz coil that is wired for separate control
- Standards Compliance: UL listed and CSA certified
Technical Specifications
3 pole, 18 ampere rating with 110 V at 50 Hz or 120 V at 60 Hz coil voltage. Open device without an enclosure with 4.34 inches tall, 3.22 inches wide and 4.22 inches deep dimensions. Contact configuration is 3PST (3 pole single-throw) with screw clamp terminals for field wiring.
Typical Applications
The Square D 8502-SB0 2 is commonly applied in:
- Three-phase motor starting circuits with separate overload relays
- Industrial heating and capacitor switching
- Transformer and load distribution control
- Panel-mount automation systems requiring full-voltage, non-reversing motor control
- HVAC and machinery control where continuous duty operation is required
Compatibility & Replacements
Compatible With
- Square D thermal overload relays (Classes 8736, 8737, 8738)
- Industrial control panels and enclosures rated NEMA Type 1 and above
- Standard contactor starters and motor control circuits
- Screw-terminal wiring in industrial settings
- Separate low-voltage control circuits (24 VDC, 120 VAC available with control transformer)
Replaces / Drop-In Replacement For
- Earlier Series A versions of the 8502-SB0 2
- Functionally equivalent to other Class 8502 Type S Size 0 configurations with matching coil voltage and pole count
Works With
- Square D motor starters and control devices
- Standard industrial thermal overload protection relays
- AC power distribution systems (50/60 Hz)
- Low-voltage control transformers for remote operation
- Pilot devices (push buttons, selector switches) rated for contactor coil voltage
