DERELL DEB-37-A 220V | Compact Cooling Thermostat with Defrost Function

DEB-37 is a compact-size digital thermostat (33x75 mm) designed for heating and cooling systems. It supports automatic and manual defrost control by stopping the compressor and offers one dry contact digital input for alarm or logic functions.

The unit provides protection through *compressor delay parameters* and allows setting of *high/low temperature alarm limits*. It can also start a defrost cycle upon power-up with configurable delay.

With features like key lock, standby mode, sensor fault behavior, and parameter locking, the DEB-37 is ideal for applications that require simple but reliable temperature management.

Typical Applications: Cooling cabinets, commercial refrigeration units, evaporator-based defrost systems, compact chillers, etc.

▶︎ Technical Specifications

Panel Cutout: 29x71 mm
Body Size: 33x77 mm
Power Supply: 230V AC, 24V AC/DC, or 12V AC/DC (model specific)
Relay Output: NO 16A or NO 30A (model specific)
Inputs: 1 x NTC sensor, 1 x digital input (dry contact)
Operating Range: -40°C to +150°C
Display: 3-digit 12mm LED
Front Protection: IP65
Mounting: Horizontal panel mount
Power Consumption: Max. 3.5 VA

▶︎ Editor's Tips & Experience

This device is perfect for compact cooling systems. If you're installing multiple units, use the *d5 parameter* to delay defrost start times and avoid simultaneous defrosting.

Be sure to separate power cables from sensor wires to prevent interference. In humid areas, ensure the device is recessed into the panel for protection, since IP65 only applies to the front face.

With simplified parameters and high durability, this device is highly recommended for price/performance-focused projects. Button structure is intuitive and menu navigation is very user-friendly.

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