061B100866 Danfoss MBC 5100 Pressure Switch 1-10 bar

Product Overview

The 061B100866 (Danfoss MBC 5100 series) is a heavy-duty modular pressure switch designed for industrial and marine hydraulic/pneumatic systems. Featuring a diaphragm sensing element with a regulation range of 1–10 bar, automatic reset and IP65 enclosure, it delivers precise switching performance. Fully interchangeable with original Danfoss MBC 5100 units, every switch undergoes 100% simulated operating-condition testing to ensure accurate switching, high repeatability and long service life under rated pressure. Ideal for pressure monitoring and protection applications requiring marine approvals and high reliability.

Technical Specifications 

• Model: 061B100866 (MBC 5100 series; related variants include 061B1004, 061B0010, 061B110866, 061B7210066, 061B100566, etc.)
• Regulation range (Pe): 1 – 10 bar
• Pressure sensing element: Diaphragm
• Maximum working pressure: 150 bar
• Maximum test pressure: 150 bar
• Burst pressure: 300 bar
• Fixed differential (typical): approx. 1 bar at min. setting, 2.5 bar at max. setting
• Contact function: SPDT
• Contact rating: AC15 = 0.5 A / 250 V; DC13 = 12 W / 125 V
• Electrical connection: DIN plug (EN 175301-803-A, Pg 11)
• Pressure connection: G 1/4 female (ISO 228-1)
• Enclosure rating: IP65
• Ambient temperature range: –10 to +85 °C
• Reset function: Automatic
• Net weight: approx. 0.25 kg
• Key approvals: ABS, BV, DNV, GL, LR, CCS, CE, RoHS and other marine/industrial certifications

Key Technical Advantages

1. High-precision diaphragm sensing: The diaphragm design provides typical repeatability of ±0.5 % FS within the 1–10 bar range, ensuring stable and accurate pressure monitoring and alarm functions.
2. Robust heavy-duty construction: Anodized aluminium housing combined with corrosion-resistant diaphragm and wetted parts withstands 150 bar working pressure and 300 bar burst pressure, suitable for vibration and shock environments.
3. True interchangeability and modular design: Identical mounting dimensions, electrical interface and pressure connection to original Danfoss MBC 5100 switches enable direct drop-in replacement without system modifications.
4. 100% functional verification and extensive certifications: Every unit is fully tested across its pressure range before shipment and carries multiple marine classification society and CE approvals for reliable long-term operation in demanding applications.

Application Areas

• Marine hydraulic and cooling system pressure monitoring
• Industrial hydraulic power units and pump station high/low pressure protection
• Injection molding and die-casting machine pressure alarm circuits
• Construction and mobile equipment hydraulic protection
• Compressors, refrigeration and air-conditioning pressure control

Expert Maintenance Tips

Ensure reliable sealing at the pressure connection (use appropriate gasket or thread sealant) to prevent leakage-induced false switching. Use a matching DIN plug and correct wiring to avoid contact overload. Maintain clean system media to prevent particles from affecting diaphragm sensitivity. Periodically verify setpoint accuracy and recalibrate against a reference pressure source if drift is detected. For long-term storage keep the unit dry and periodically test contact operation. Always confirm model and pressure range compatibility before replacement; never exceed the maximum working pressure to avoid damage to the sensing element.