Danfoss MBC 5100 Pressure Switch | 061B1004 061B102366 061B110066

The Danfoss MBC 5100 Series from LIC Hydraulic is a highly reliable, compact block-type pressure switch designed specifically for Marine and Heavy Industrial applications. These switches, such as the MBC 5100-2431-1DB04, are engineered to withstand the harshest vibrations and shocks found in engine rooms and hydraulic power units. We provide original-standard units with popular codes like 061B1004, 061B102366, and 061B110066. Fully certified by major classification societies (DNV, GL, LR, BV), we guarantee 100% functional interchangeability. Every switch is 100% factory-calibrated for precise set-point accuracy, ensuring your critical alarm and safety systems function flawlessly.

Technical Specifications 

• Series: Danfoss MBC 5100 (Block Design)

• Popular Part Numbers:

  • 061B1004 (MBC 5100-2431-1DB04)

  • 061B102366 (MBC 5100-2031-1CB04)

  • 061B110066 (MBC 5100-3331-1DB04)

• Setting Range: $-0.2\text{ to }400\text{ bar}$ (Depending on specific model)

• Max Working Pressure: Up to $600\text{ bar}$

• Contact Function: SPDT (Single Pole Double Throw)

• Ambient Temperature: $-40^\circ\text{C}$ to $+85^\circ\text{C}$

• Enclosure Rating: IP65

• Pressure Connection: $G 1/4$ female (Flange connection)

Key Technical Advantages

• Unmatched Vibration Resistance: The block-shaped housing eliminates the leverage effect of traditional switches, making the MBC 5100 virtually immune to the heavy vibrations found on marine engines and heavy-duty compressors.

• Ultra-Compact Footprint: Designed to save space, the block design allows for direct mounting on test valves or manifolds, reducing installation volume by $50\%$ compared to standard pressure controls.

• Stable Set-Points: Utilizing high-quality bellows technology, the switch maintains exceptional repeatability over millions of cycles, which is critical for long-term safety monitoring in remote locations.

• Global Marine Certifications: Meets all major shipping requirements. This makes it the standardized choice for lube oil pressure alarms on main engines and steering gear hydraulic interlocks.

Application Areas

• Marine Propulsion: Monitoring lube oil, fuel oil, and cooling water pressures on ship engines.

• Industrial Power Units: Safety cut-off for high-pressure hydraulic presses and accumulator charging.

• Offshore & Energy: Reliable pressure sensing for pump sets on oil rigs and subsea control systems.

• Compressor Systems: Load/unload control for high-capacity industrial air compressors.

Expert Maintenance Tips

• Seal Integrity: Ensure the PG gland is correctly tightened. In marine environments, salt spray and oil mist can cause electrical corrosion if the enclosure’s IP65 seal is compromised.

• Hydraulic Shock Protection: For systems with rapid pressure spikes (e.g., piston pumps), we highly recommend installing an internal snubber or an external damping device to protect the internal bellows from fatigue.

• Verification of Hysteresis: The MBC 5100 has a fixed micro-differential. When setting your alarm logic, ensure the system’s normal operating fluctuations do not overlap with the reset point to avoid “chatter” in the control relay.

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