Robertshaw 5000-307 Commercial Electric Thermostat 100°F to 450°F 36" Capillary

Product Overview:
Regulates temperature in commercial cooking equipment through temperature-responsive electrical switching. The Robertshaw 5000-307 is a commercial electric thermostat designed for high-temperature control applications. Its sensing arrangement detects temperature changes and operates the electrical contacts to control connected heating equipment. The adjustable temperature range of 100°F to 450°F supports temperature regulation across a broad range of commercial cooking conditions.

Temperature Sensing Mechanism:
The thermostat uses a pressure-responsive diaphragm assembly consisting of two electrically welded stainless-steel diaphragms. Changes in temperature at the sensing bulb affect the internal pressure, producing movement within the diaphragm assembly. This movement transfers a mechanical response to the switching mechanism. The sensitive construction is designed to detect small temperature changes while maintaining a consistent control response.

Electrical Switching and OFF Control:
The DPST configuration operates two electrical contact paths through a snap-action mechanism. Its positive OFF feature allows the control to disconnect the circuit when turned to the designated OFF position. The snap-action operation produces a distinct contact transition, while the terminal arrangement accommodates different wiring orientations within the equipment assembly.

Replacement Guidelines:
Replace the Robertshaw 5000-307 Commercial Electric Thermostat when temperature sensing becomes unreliable, the electrical contacts fail to switch, or connected cooking equipment no longer responds correctly to temperature adjustments. Replacement may also be necessary if the sensing bulb, capillary tube, terminals, or adjustment mechanism becomes damaged. Have a qualified service technician handle electrical testing and replacement.

Common Signs of Wear:

• Heating continues beyond the intended temperature setting.
• Temperature regulation becomes inconsistent.
• Thermostat contacts fail to switch correctly.
• The sensing bulb or capillary tube shows visible damage.
• The adjustment dial becomes difficult to turn.
• The OFF position fails to interrupt the electrical circuit.

Equipment Compatibility:
The Robertshaw 5000-307 Commercial Electric Thermostat is an OEM component belonging to the Robertshaw 5000 Series D1 and D18 commercial electric thermostat family. It is designed for equipment requiring a DPST control with a 100°F–450°F temperature range and specified electrical ratings. Before ordering, verify the original thermostat identification, electrical requirements, capillary length, bulb dimensions, terminal arrangement, and mounting configuration against the equipment manufacturer's documentation.

Technical Specifications:
Brand: Robertshaw
Part Number: 5000-307
Component Type: Commercial Electric Thermostat
Temperature Range: 100°F–450°F
Capillary Length: 36 inches