Robertshaw 5300-146 Thermostat

The Robertshaw 5300-146 is a heavy-duty electric thermostat engineered for precise temperature management in commercial cooking equipment and industrial heating applications. This SJ-328-36 direct acting thermostat operates with an open high contact configuration, providing a critical safety boundary by interrupting power to the heating element once the set point is reached. With a broad temperature range of 100°F to 450°F (also rated up to 493°F for specific high-limit ceiling loads), it is a standard choice for commercial ovens, furnaces, and plastic molding machinery where thermal consistency is non-negotiable.

This unit features a 36-inch capillary tube paired with a 3/16" x 11-1/8" nickel-plated sensing bulb, ensuring rapid thermal response and accurate sensing even in remote mounting configurations. The integrated auxiliary switch provides secondary control logic for pilot lights or auxiliary components, rated for up to 30 Amps at 277V AC. Built with a rugged snap-acting SPST switch and silver contacts, the 5300-146 is designed to withstand the high-cycle demands of professional kitchens and industrial environments.

• High-Capacity Electrical Rating: Capable of handling 30A at 277V AC, making it suitable for high-wattage heating elements.
• Versatile Application: Ideal for commercial electric thermostats in deep fryers, ovens, and industrial heat treatment equipment.
• Flexible Installation: Features a 36" capillary and a 4-way slip-fit dial for simplified field replacement.
• Integrated Safety: The open-on-rise action ensures equipment protection by preventing runaway temperature conditions.

Is this thermostat compatible with 480V systems?
Yes, the 5300-146 is rated for 20 Amps at 480V AC, in addition to its 30 Amp rating at 277V AC.

Does this unit include the dial and mounting hardware?
Yes, this model typically ships with the 4-way slip-fit dial and necessary mounting hardware for standard 1-3/4" bracket spacing.

What is the mechanical differential for this model?
The Robertshaw 5300 series generally maintains a mechanical differential of approximately 12°F to ensure stable cycling without excessive wear on the contacts.

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.