Fenwal 11-030000-000 Thermoswitch

The Fenwal 11-030000-000 Thermoswitch is a precision-engineered surface mount temperature controller designed for rapid response in demanding industrial and commercial thermal systems. Utilizing the principle of differential expansion of metals, this unit features a stainless steel outer case that expands at a specific rate relative to the internal bridge assembly. Because the housing is in direct contact with the heated surface, the 11-030000-000 provides almost instantaneous sensing of temperature fluctuations. This specific model is configured for open on rise operation, meaning the electrical contacts break the circuit when the temperature reaches your set point, typically to prevent overheating in vending machines, food warming trays, or laminating presses.

This adjustable temperature switch covers a versatile range from 50°F to 300°F and is rated for a 1200 Watt resistive load at 120VAC or 240VAC. The rugged construction and narrow temperature differential make it a reliable choice for HVACR contractors looking for a field-proven solution in process control equipment. With its compact footprint and surface mounting brackets, it integrates seamlessly into tight spaces where traditional probe-style thermostats cannot fit.

Key Benefits

• High Sensitivity: The differential expansion design ensures immediate response to surface temperature changes.
• Wide Adjustability: Field-adjustable range from 50°F to 300°F allows for precise calibration across various applications.
• Compact Profile: Ideal for OEM or aftermarket installations in equipment with limited internal clearance.
• Industry Certified: UL recognized and CSA certified for safety and performance compliance.
• Durable Construction: Features a corrosion-resistant stainless steel case and cover for longevity in harsh environments.

Common Questions

How do I adjust the temperature setting on the Fenwal 11-030000-000?
The set point is adjusted via the aluminum bronze screw. Turning the screw changes the internal bridge tension; typically, one full turn results in a specific Fahrenheit shift as detailed in the Fenwal 30000 series technical sheet.

What is the difference between "open on rise" and "close on rise"?
An open on rise (normally closed) switch, like this model, breaks the electrical circuit when the temperature increases to the set point. A close on rise (normally open) switch completes the circuit upon reaching the target temperature.

Can this thermoswitch be used for inductive loads?
While optimized for 1200W resistive loads, using this for inductive loads or tungsten filament lamps requires careful attention to inrush current, which can be 10 to 15 times the steady-state current and may exceed the 10A/5A rating.

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.