The Danfoss ACB-2UA203W (Order Code: 061F60) is a high-quality, fixed differential pressure switch cartridge designed for reliable compressor protection and system control in refrigeration and air conditioning applications.
As a core component within a pressure switch housing, this cartridge provides a robust and cost-effective solution for OEMs and service technicians. It is engineered to monitor system pressure and automatically shut off the compressor in the event of unsafe low pressure (loss of refrigerant) or high pressure (condenser blockage, overcharge), preventing catastrophic damage and ensuring operational safety.
Key Features & Benefits:
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Fixed Differential Setting: The ACB-2UA203W comes with a pre-set, non-adjustable differential, ensuring consistent and tamper-proof operation. This model is a low-pressure cut-out switch.
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Compact Cartridge Design: As a cartridge unit, it allows for easy integration into dedicated pressure switch housings (like Danfoss housings), simplifying assembly and replacement.
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High Reliability: Built with Danfoss’s renowned engineering standards, it offers long service life and dependable performance under demanding conditions.
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Compressor Protection: Primarily functions as a low-pressure protector (LPP) to prevent compressor operation under insufficient refrigerant charge, avoiding motor burnout due to lack of cooling.
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Wide Application Range: Suitable for use with various refrigerants (R134a, R404A, R407C, R410A, R449A, etc.) in commercial refrigeration systems, condensing units, and air conditioning systems.
Technical Specifications:
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Product Type: Pressure Switch Cartridge (Fixed Differential)
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Function: Low Pressure Cut-Out (Protection against loss of refrigerant).
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Setting Range: The “W” in the model number indicates a specific cut-out setting range. Typical setting for ACB-2UA203W is a cut-out at 0.2 bar (g) with a fixed differential of 1.4 bar. (Always verify on the product label or datasheet).
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Maximum Working Pressure (MWP): 35 bar (for HFC refrigerants like R404A, R410A, etc.).
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Electrical Rating: Suitable for use with external electrical switches or relays, as the cartridge itself typically operates a micro-switch inside the housing.
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Connection: Designed to be mounted into a compatible pressure switch housing with a pressure port.
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Material: Brass body, stainless steel internal components.
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Common Replacement / Cross-reference: This is a standard Danfoss ACB series cartridge, often used to replace failed switches in existing systems.
Typical Applications:
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Commercial Refrigeration Condensing Units
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Refrigerated Display Cases
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Walk-in Coolers & Freezers
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Transport Refrigeration
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Air Conditioning Systems
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