061B100566 Danfoss MBC5100 Pressure Switch 5-40 bar

Product Overview

The 061B100566, 061B010466, 061B100166, 061B100466 and 061B110466 belong to the Danfoss MBC 5100 series of modular pressure switches. Designed for heavy industrial and marine applications, these switches use bellows, diaphragm or piston sensing elements to deliver high repeatability and reliable switching. They feature automatic reset, IP65 enclosure and multiple marine approvals (ABS, DNV, BV, etc.). Fully interchangeable with original Danfoss MBC 5100 units, every switch undergoes 100% simulated operating-condition testing for pressure monitoring and protection in hydraulic, pneumatic and refrigeration systems.

Technical Specifications 

• Model: 061B100566 / 061B010466 / 061B100166 / 061B100466 / 061B110466 (MBC 5100 series)
• Type: Modular pressure switch
• Regulation range (example 061B100566): 5–40 bar (Pe)
• Maximum working pressure: 150 bar (diaphragm versions)
• Burst pressure: 300 bar (diaphragm versions)
• Sensing element: Diaphragm (high-pressure) or Bellows (low-pressure)
• Contact function: SPDT
• Contact rating: AC15 0.5 A / 250 V; DC13 12 W / 125 V
• Reset function: Automatic (Auto)
• Differential: min. approx. 2 bar, max. approx. 7 bar (setting-dependent)
• Pressure connection: G1/4 (ISO 228-1, female, flange option)
• Enclosure rating: IP65
• Ambient temperature: –10 to +85 °C (diaphragm versions)
• Repeatability: Diaphragm ±0.5 % FS typ., ±1.0 % FS max.
• Response time: < 4 ms
• Weight: approx. 0.25–0.4 kg
• Approvals: ABS, BV, DNV, CCS, CE, LR, RINA and other marine/industrial certifications

Key Technical Advantages

1. High repeatability: Bellows or diaphragm sensing design provides precise and consistent switching for accurate pressure monitoring and protection.
2. Robust marine-grade construction: IP65 protection, vibration resistance and multiple classification society approvals make it suitable for harsh marine and industrial environments.
3. True interchangeability and modular design: Identical interfaces and setting ranges to original Danfoss MBC 5100 series enable direct drop-in replacement; modular construction simplifies maintenance.
4. 100% functional verification under simulated conditions: Every unit is fully tested across pressure switching and environmental conditions before shipment, ensuring long-term reliability.

Application Areas

• Pressure protection on marine hydraulic and cooling systems
• Industrial hydraulic power units and pump stations
• Compressors and refrigeration systems
• Construction machinery and mobile equipment
• Applications requiring marine-approved pressure switches

Expert Maintenance Tips

Ensure reliable sealing at the pressure connection using the correct gasket and specified torque. Observe contact ratings during electrical wiring to avoid overload. Periodically check set-point and differential for drift and recalibrate if necessary. Maintain clean system media to protect the sensing element. For long-term storage keep dry and avoid extreme temperatures. Always confirm regulation range and reset function compatibility before replacement; never exceed the maximum working pressure.