Robertshaw 5300-721 Thermostat

The Robertshaw 5300-721 Thermostat is a heavy-duty, field-proven electric thermostat engineered for demanding high-temperature applications in the commercial cooking industry. This snap-acting thermostat features a single pole single throw (SPST) configuration, providing a clean break on temperature rise with a fixed set point of 435°F. Designed for reliability in dense kitchen environments, it utilizes silver contacts and rugged terminals to maintain switching accuracy under high-amperage loads. The assembly includes a 36-inch capillary tube, allowing for flexible mounting of the control body away from the direct heat source. The sensing bulb features technical dimensions of 3/16-inch diameter by 5-7/8-inch length, ensuring rapid thermal response in fryers, grills, or other industrial thermal regulation systems.

As a direct acting 5300 series model, the Robertshaw 5300-721 is a standard replacement for commercial kitchen equipment parts requiring precise thermal limit control. The mechanical differential is tuned to 5°F, minimizing temperature overshoot and protecting heating elements from premature cycling. Whether you are performing a routine service or a critical repair, this thermostat’s compact footprint and industry-standard mounting holes make it a versatile fit for multiple OEM replacement scenarios.

• Precise 435°F Fixed Setting: Eliminates the risk of accidental adjustment in critical temperature-limit applications.
• Heavy-Duty Silver Contacts: Engineered for sustained electrical conductivity and minimal contact resistance under load.
• 36" Capillary Length: Provides ample reach for standard and deep-well equipment configurations.
• Snap-Action Reliability: High-speed switching prevents arcing and ensures consistent performance across thousands of cycles.
• Rugged Build: Compact design tailored for high-ambient environments found in commercial baking and cooking.

Is the bulb compatible with nickel-plated or copper fittings?
Yes, the Robertshaw 5300-721 sensing bulb is designed for compatibility with common thermal wells and compression fittings across the 5300 series range.

Can I use this for a 3-phase application?
This is a single pole single throw (SPST) thermostat. For 3-phase applications, it must be wired to a contactor or relay rated for the total load.

What is the maximum ambient temperature for the control housing?
The control body is rated for ambient temperatures up to 200°F (93°C), making it suitable for mounting behind insulated equipment panels.

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.