Siemens Building Technology 141-0521 Thermostat

The Siemens Building Technology 141-0521 is a commercial-grade line voltage remote bulb thermostat engineered for high-accuracy temperature regulation in demanding HVACR environments. This 2-position room thermostat features a liquid-filled sensing element and a 6-foot capillary tube, providing a responsive SPDT snap-action switch for direct control of heating or cooling equipment. Designed for versatility, the 141-0521 operates across 100 to 240 VAC, making it a standard choice for heavy-duty fan coil units, unit heaters, and industrial packaged HVAC systems.

With a broad temperature setpoint range of 100°F to 240°F and an adjustable differential of 6°F to 24°F, this Siemens thermostat allows technicians to fine-tune system cycling to prevent short-cycling and ensure equipment longevity. The gray baked enamel steel case protects the internal mechanisms, which are suitable for switching damper motor actuators, motor-actuated valves, and high-load relays. This industrial-strength controller facilitates efficient summer-winter changeover and reliable air or liquid temperature monitoring in both commercial and light industrial applications.

• Universal Voltage Compatibility: Hardwired for reliable operation in 100 to 240 VAC electrical systems.
• High-Temperature Range: Precise setpoint adjustment from 100°F to 240°F (38°C to 116°C) for high-limit or process control.
• Remote Bulb Sensing: Features a durable 6-foot capillary tube for monitoring temperatures in ducts, tanks, or remote locations.
• SPDT Switching Logic: Enclosed Single-Pole Double-Throw switch supports both heating and cooling logic.
• Adjustable Differential: Field-adjustable 6°F to 24°F differential minimizes mechanical wear through optimized cycling.

What is the maximum bulb temperature for the 141-0521?
The remote sensing bulb is rated for a maximum temperature of 250°F (121°C) to ensure peak performance without damaging the liquid-filled element.

Can this thermostat be used for both heating and cooling?
Yes, the SPDT (Single-Pole Double-Throw) configuration allows you to wire the thermostat to either break the circuit on temperature rise (heating) or make the circuit on temperature rise (cooling).

Is the temperature differential fixed?
No, the 141-0521 features a field-adjustable mechanical differential ranging from 6°F to 24°F, allowing for specific calibration based on the thermal mass of the system.

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.