York S1-025-35318-000 Motor Protector

The York S1-025-35318-000 Motor Protector is a critical 120/240V dual-voltage component designed to provide precise thermal overload protection for HVACR motors. Engineered for high-duty cycle applications, this solid-state motor protector monitors current flow and winding temperatures to prevent winding burnout caused by mechanical jams, voltage fluctuations, or phase loss. Its 50/60 Hz compatibility makes it a versatile solution for OEM HVAC replacement parts across various residential and commercial York and Johnson Controls platforms. The compact design facilitates quick integration into existing control circuits, and the automatic reset functionality ensures minimal downtime by restoring operation once safe thermal parameters are met. For field technicians, using a genuine S1-025-35318-000 motor overload protector is essential for maintaining the sub-system integrity and operational efficiency of the primary blower or compressor motor.

• Dual-Voltage Versatility: Fully rated for both 120V and 240V circuits, reducing the need to stock multiple specialized protectors.
• Thermal Sensitivity: High-accuracy sensor response curves prevent permanent motor damage during locked-rotor conditions.
• Solid-State Reliability: Optimized for industrial-grade performance with a vibration-resistant housing suited for high-torque HVAC environments.
• Automatic Reset: Eliminates unnecessary service calls by self-correcting after a temporary thermal trip once the motor cools.

Is the S1-025-35318-000 compatible with both 50Hz and 60Hz systems?
Yes, this protector is engineered to operate on both line frequencies, making it suitable for standard domestic and international power supplies.

Can this module replace mechanical overload relays?
This is an OEM direct replacement. If your unit specified the S1-025-35318-000, it provides superior solid-state monitoring compared to older bi-metal mechanical relays.

What causes this motor protector to trip frequently?
Recurring trips typically indicate a failing run capacitor, high mechanical friction in the motor bearings, or significant voltage drops at the contactor.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.