Robertshaw 5210-124 Thermostat

The Robertshaw 5210-124 is a professional-grade B10 Series commercial electric thermostat designed for high-precision temperature regulation in demanding HVACR and food service environments. Featuring a direct acting, single pole single throw (SPST) configuration, this controller utilizes a slow make-and-break mechanism to maintain a tight temperature differential of approximately 2°F. With a broad operating range of 60°F to 210°F and a 36-inch copper capillary tube, this unit is engineered for versatility across a variety of equipment, including steam tables, laboratory ovens, commercial dishwashers, and scalding tanks. The 3/16" x 15-3/8" nickel-plated sensing bulb ensures sensitive detection of thermal shifts, while the fine silver contacts provide consistent switching action under resistive loads of 20 Amps at 120V AC or 15 Amps at 240V AC. This Robertshaw 5210-248 alternative is a reliable replacement for Uni-Line 23136 and Johnstone Supply F16-897, offering a rugged, compact footprint suitable for tight cabinet installations where accurate process control is non-negotiable.

• Broad Compatibility: Directly replaces multiple OEM parts including Z90644-36, E-183, and 23136.
• High Precision: Features a small mechanical differential for applications requiring stable, narrow-band temperature maintenance.
• Durable Construction: Equipped with a nickel-plated copper bulb and 36" capillary to withstand harsh chemical and moisture-heavy environments.
• Flexible Electrical Ratings: Supports up to 20A at 120V AC or 15A at 240V AC, making it suitable for a wide range of heating elements.
• Industry Standard Compliance: Meets UL E12103 and CSA LR36461 standards for commercial appliance safety.

What is the difference between direct acting and reverse acting in these models?
The 5210-124 is a direct-acting control, meaning the switch opens on temperature rise. This makes it a standard choice for heating applications like water baths and sterilizers where the element must be deactivated once the setpoint is reached.

Can I use this thermostat for low-voltage control circuits?
While this unit is rated for line voltage (120/240V), it can be used in 24V pilot duty applications. However, always ensure the total amp draw of the contactor coil does not exceed the resistive load ratings provided in the technical specifications.

How do I handle the 36-inch capillary during installation?
The 36" capillary tube must be handled carefully to avoid kinking, which can obstruct the fluid expansion and cause calibration drift. Ensure a minimum bend radius and avoid contact with high-voltage lines to prevent electrical interference or physical damage.

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.