York S1-FRSR15 Fuse

The York S1-FRSR15 Fuse is a professional-grade circuit protection component designed for high-demand industrial and commercial HVACR systems. This 600V Class RK5 fuse utilizes a dual-element, time-delay design, making it the standard choice for protecting motors, transformers, and branch circuits where inductive loads are present. Rated at 15 Amps, the S1-FRSR15 time-delay fuse is engineered to withstand the momentary high inrush currents associated with compressor and blower motor startups, preventing nuisance trips while providing precise overcurrent protection. As a genuine York replacement fuse, it ensures physical and electrical compatibility within existing equipment footprints, maintaining the safety integrity of the system. Contractors rely on this 15 Amp dual-element fuse for its high interrupting rating and current-limiting capabilities, which are essential for robust HVAC circuit protection and preventing downstream component failure during electrical faults.

Key Benefits

• Dual-Element Design: Provides a critical time-delay to handle motor starting currents without premature clearing.
• RK5 Classification: Offers high-level current limitation and a 200,000 Amp interrupting rating for maximum safety.
• Voltage Versatility: Rated for systems up to 600V AC, suitable for heavy-duty commercial power configurations.
• Reliable Build: Engineered to withstand the thermal cycling and vibration common in rooftop units and chillers.

Common Questions

What are the symptoms of a failed S1-FRSR15 fuse in an HVAC system?
Usually, the system will experience a complete loss of power to the specific sub-circuit the fuse protects, such as the condenser fan or compressor. Technicians should verify failure using a continuity test with a multimeter.

Can I use a Class H or Class K5 fuse as a substitute?
No. While they may physically fit, Class RK5 fuses like the S1-FRSR15 provide superior current-limiting features. Substituting with a lower class fuse can compromise the safety rating of the equipment panel.

Why does this fuse blow immediately upon motor startup?
If the 15 Amp rating is correct for the load, an immediate blow typically indicates a direct short-to-ground in the motor windings or a seized mechanical component causing excessive Locked Rotor Amps (LRA).

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.