Robertshaw 5300-404 Thermostat

The Robertshaw 5300-404 is a heavy-duty high-limit thermostat engineered for precise temperature control in commercial cooking equipment, specifically Millivolt high-limit applications. This mechanical thermostat features a temperature range of 245°F to 406°F, making it a critical safety component for deep fryers and griddles. It utilizes a 30-inch capillary and a 5/16" x 8-3/4" nickel-plated bulb to ensure rapid thermal response and accurate sensing of oil or surface temperatures. Designed for Millivolt gas valves, the 5300 series operates as a secondary safety switch that breaks the thermopile circuit if temperatures exceed the set limit. Field technicians prefer this SPST break-on-rise control for its reliability in harsh kitchen environments. When replacing commercial fryer thermostats, ensure the bulb is properly seated in the sensing bracket to maintain calibration. This Robertshaw manual reset model provides the necessary failsafe to prevent equipment damage and oil flashing.

• Precise High-Limit Protection: Calibrated for 245°F to 406°F operation to prevent overheating in commercial deep fryers.
• Durable Construction: Features a nickel-plated bulb and 30" capillary for resistance to corrosion and high heat.
• OEM Compatibility: Replaces specific commercial kitchen parts for major brands like Pitco, Frymaster, and Southbend.
• Millivolt System Integration: Optimized for use with thermopile-generated power, ensuring fail-safe operation without external electricity.

Can I use this on a 24V or 120V system?
No, this specific model is designed for Millivolt (MV) circuits. Using it on higher voltage systems will damage the internal contacts and lead to immediate failure.

What causes a high-limit thermostat to trip repeatedly?
This usually indicates a failure in the primary operating thermostat, excessive buildup on the sensing bulb, or a failing thermopile that is dropping below the required voltage threshold.

Is the bulb compatible with all fryer oil types?
Yes, the nickel plating provides protection against the fatty acids and high temperatures found in standard commercial frying oils.

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.