Danfoss MBS 5100 Compact Pressure Switch
(Order Code: 060N1021 / MBS 5100-1811-A6CB04-4)

The Danfoss 060N1021, identified as model MBS 5100-1811-A6CB04-4, is a reliable, compact electromechanical pressure switch engineered for safety and control functions in demanding refrigeration, air conditioning, and industrial fluid systems. This specific model is typically configured as a low-pressure or high-pressure control with a manual reset function, providing critical protection against unsafe operating conditions.
Key Features and Product Highlights
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Compact Safety Design: Provides essential pressure monitoring in a space-saving, robust metal housing, suitable for installations with spatial constraints.
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Manual Reset Safety Feature: This model (1811-A6CB04-4) incorporates a manual reset mechanism. Following a trip event, the switch remains in the tripped state until an operator manually resets it, preventing automatic system restart and ensuring fault investigation.
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Externally Adjustable Set Point: Features an external adjustment screw with a calibrated dial, enabling precise on-site setting of the activation (trip) pressure to match specific application requirements.
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Versatile SPDT Switching: Equipped with a Single-Pole, Double-Throw (SPDT) electrical contact. This provides Common (C), Normally Closed (NC), and Normally Open (NO) terminals, offering maximum flexibility for integration into safety shutdown, alarm, or control circuits.
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Durable Construction: Built with a sturdy metal casing that provides excellent resistance to vibration, moisture, and environmental stressors common in HVACR and industrial applications.
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Broad Media Compatibility: Designed for use with common HFC and HCFC refrigerants (e.g., R134a, R404A, R407C, R410A) as well as compatible oils and non-corrosive fluids.
Applications
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Refrigeration Systems: Low-pressure control for pump-down cycles, evaporator fan control, or low-pressure safety cut-out to prevent compressor operation under low charge or loss of load conditions.
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Air Conditioning & Heat Pumps: Can serve as a low-pressure safety switch or a high-pressure control depending on its calibrated range.
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Industrial Process Cooling: Pressure monitoring and safety shutdown in chillers and process cooling loops.
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Fluid System Protection: Safety cut-off for pumps or compressors in compatible hydraulic or pneumatic systems.
Danfoss 060N1021 MBS 5100 | Pressure Switch | MBS 5100-1811-A6CB04-4
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Assured Safety Protocol: The manual reset function is a critical safety feature, ensuring a tripped condition is formally acknowledged and addressed before system re-commissioning.
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Installation and Service Flexibility: The external adjustment allows for quick field calibration, simplifying installation and fine-tuning during service.
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Space-Efficient Reliability: Delivers robust protection in a compact footprint, ideal for modern, densely packed equipment.
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Trusted Brand Quality: Manufactured by Danfoss, a global leader in HVACR controls, ensuring high reliability and performance.
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Global Acceptance: A widely used and recognized component, facilitating easier sourcing and technician support.
Brief Description
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Primary: Danfoss MBS 5100, pressure switch, manual reset pressure switch, adjustable pressure control
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Technical: Danfoss 060N1021, SPDT pressure switch, 1811-A6CB04-4, low-pressure cut-out
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Application: Refrigeration pressure control, AC safety switch, compressor protection switch
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Features: Manual reset, external calibration, IP44 enclosure, SAE flare connection
Danfoss MBS 5100 (060N1021) compact pressure switch. Model 1811-A6CB04-4, adjustable set point, SPDT contact, manual reset for HVACR and industrial safety.