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Datasheet generated 2026-10-07
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Danfoss MP55A oil differential pressure switch, 0.3 bar–4.5 bar adjustable, manual (minimum) reset, 90 s time delay, M12X1.5

Danfoss · Sensors & Instrumentation · Pressure Switches · Denmark · danfoss.com
Part Number
060B018491  ·  HS 9026.20
Danfoss MP55A oil differential pressure switch, 0.3 bar–4.5 bar adjustable, manual (minimum) reset, 90 s time delay, M12X1.5

Danfoss MP55A oil differential pressure switch, genuine OEM code number 060B018491. Protects a refrigeration or air-conditioning compressor against loss of lubricating oil pressure by monitoring the differential between oil-pump pressure and crankcase (suction) pressure and cutting out when it falls below the set value. Adjustable differential 0.3 bar–4.5 bar via the setting disc, factory set 0.65 bar, with readable internal scale; manual (minimum) reset with a 90 s time-delay relay that allows oil pressure to build during start-up. SPDT contact system, M12x1.5 metric thread (ISO 8434-1) pressure connection, screwed cable entry (Pg 13.5), IP20 enclosure. Max. working pressure 17 bar. Suitable for HCFC and non-flammable HFC refrigerants. EAN 5702424499662.

Technical Specifications

BrandDanfoss Part number (code number): 060B018491 Type: MP55A oil differential pressure switch (lubrication safety control) Category: Sensors & Instrumentation — Pressure Switches Function: cuts out on falling oil pressure (differential of oil-pump pressure over crankcase pressure) Differential setting: 0.3 bar–4.5 bar (4.3 psi–65 psi), factory set 0.65 bar Reset: manual (minimum) Time-delay relay: 90 s (allows oil pressure to build at compressor start-up) Contact system: SPDT Contact rating: AC15=2 A, 250 V DC13=0.2 A, 250 V Pressure connection: M12x1.5 metric thread (ISO 8434-1) Max. working pressure: 17 bar (245 psig) Max. test pressure: 22 bar Operating range
LP side-1 bar to 12 bar Electrical connection: Screwed cable entry Pg 13.5 Enclosure rating: IP20 Ambient temperature: -40 °C to 60 °C Refrigerant compatibility: HCFC and non-flammable HFC (e.g. R22, R134a, R404A, R407C, R448A, R449A, R450A
R513A) PackingMulti pack (21 pc) EAN: 5702424499662 HS code: 9026.20

Properties

MaterialBellows-type differential pressure element; IP20 enclosure
Pressure ratingmax. working pressure 17 bar (245 psig); test 22 bar
Temperature range-40 °C to 60 °C ambient
IP ratingIP20
Standard sizeM12x1.5 metric thread (ISO 8434-1)
Thread standardM12x1.5 metric thread (ISO 8434-1)
MOQ1

Compatibility

MP55A lube-oil protection control for reciprocating and scroll refrigeration/AC compressors. MP55/MP55A differential is adjustable via the setting disc. The 90 s variant is distinct from the other MP time-delay/reset options — verify the required time delay and reset (manual vs automatic) for the compressor.

Standards

Approvals

Attached Documents