Robertshaw 5300-402 Thermostat

The Robertshaw 5300-402 Thermostat is a heavy-duty, snap-acting millivolt thermostat specifically engineered for high-demand commercial cooking equipment. Operating within a 200°F to 400°F temperature range, this SPST (Single Pole Single Throw) control is a reliable solution for gas fryers and ovens requiring a direct current millivolt system. It features a 24-inch capillary tube and a 3/8-inch integral stuffing box, ensuring a leak-proof seal for remote sensing applications in pressurized or fluid-filled environments. The Robertshaw RX series design utilizes a hermetically sealed reed switch and silver contacts to protect against the grease, moisture, and high ambient temperatures (up to 200°F) common in professional kitchens. Professionals often cross-reference this unit with the KX-396 or use it as a Robertshaw thermostat replacement for Vulcan and Star MFG units. With its 13/16-inch stem length and "flat-down" orientation, the 5300-402 provides the precise thermal regulation necessary for consistent food quality and equipment safety.

• Enhanced Durability: Equipped with a hermetically sealed reed switch to prevent switch contamination in harsh commercial environments.
• Critical Precision: Maintains a tight 8°F mechanical differential for stable temperature control in Robertshaw gas oven thermostat applications.
• Versatile Compatibility: Serves as a direct replacement for various OEM models including Anets, Star, and Vulcan (P8901-70, 411506-13, RX-10-24).
• Secure Installation: The 3/8-inch nickel-plated stuffing box allows for safe, secure mounting in tanks or fryers where a liquid-tight seal is required.

Is the Robertshaw 5300-402 compatible with standard 120V or 240V circuits?
No. This is a millivolt thermostat designed specifically for low-voltage direct current (DC) applications, typically 5V DC at 0.67 Amps. It is not intended for high-voltage AC electrical loads.

What is the purpose of the stuffing box on this model?
The 3/8" stuffing box (or compression fitting) is essential for applications where the bulb must pass through a wall into a pressurized or liquid-filled chamber, such as a deep fryer or pressure cooker, to prevent leaks.

How do I confirm the orientation for the control knob?
The 5300-402 features a 13/16-inch stem with the flat in the "down" position. Verify your equipment's knob configuration and stem depth before installation to ensure accurate temperature indexing.

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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.