Robertshaw 5300-621 Thermostat

The Robertshaw 5300-621 is a professional-grade electric cooking control designed specifically for the rigorous demands of commercial kitchen environments. Engineered as a snap-acting thermostat, this SPST thermostat utilizes a single pole single throw mechanism to provide precise temperature regulation for industrial heating and cooling systems. With a versatile operating range of 100°F to 200°F (38°C to 93°C), this commercial thermostat replacement is the go-to solution for contractors servicing warming cabinets, low-temperature ovens, and specialized food service equipment. The unit features heavy-duty silver contacts and 1/4" quick-connect terminals to ensure sustained electrical conductivity under high-load conditions.

Built for durability and ease of installation, the Robertshaw 5300-621 Thermostat includes a 36-inch capillary and a 1/4" x 12-1/2" copper sensing bulb, allowing for flexible mounting in dense equipment chassis. This Uni-Kit configuration is a direct acting thermostat capable of handling 30 Amps at 277V AC, making it a rugged alternative for several OEM models from Blodgett, Bendix, and Ranco. The mechanical differential is fixed at a tight 6°F, ensuring consistent cycling and preventing over-temperature conditions in sensitive applications. This industrial temperature control arrives complete with a dial and bezel to streamline field replacements and minimize downtime on the line.

• Sustained Accuracy: High-performance snap-action mechanism prevents arcing and extends contact life.
• Broad Compatibility: Replaces common industry parts including Blodgett 15365 and Ranco G1-1067.
• Rugged Construction: Compact K & S Series design supports ambient temperatures up to 200°F.
• Flexible Installation: Features a 2-inch stem and 36" capillary tube for versatile bulb placement.
• Reliable Switching: 30 Amp rating at 277V AC accommodates high-draw commercial components.

Is this thermostat suitable for deep fryers?
No. With a maximum limit of 200°F, this model is designed for low-temp ovens and warming equipment. High-temp fryers typically require Robertshaw 5300 series models with higher ranges, such as 200°F to 400°F.

Can the capillary tube be cut or shortened?
Under no circumstances should the capillary be cut. It is a sealed system containing fluid; any breach will render the 5300-621 inoperable.

What is the difference between direct acting and reverse acting in this series?
This is a direct acting control, meaning the contacts open on a temperature rise. This is the standard configuration for heating applications to break the circuit once the setpoint is reached.

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.