Type: MN3, snap action contact pressure switch, field adjustable, metal fitting, 3 poles DT contact


Uses: High electrical rating, for 250V.

Main applications: Pressure sensing on water heaters, boilers, spas and swimming pools heaters and filters, electrical appliances (For incorporation).

Membrane: EPDM, dia 45 mm. Silicone or NBR on request.

Fluid: water or air.

Fitting: Brass (stainless steel on request).

Pressure: positive.

Housing: PA66, UL94 VO, IP00.

Contacts: 3 SPDT switches, snap action. NO or NC contacts available with MOQ Electrical rating: Depends on micro-switch operating force that is linked to the electrical rating.

– Standard rating micro-switch (medium and high pressure calibration only): 16A 125/250VAC;1/2HP 125VAC; 3/4HP 250VAC.

– High rating micro-switch (medium and high pressure calibration only): 2HP 240V, 21(8) A 240V (UL, CSA VDE switch).

– Low force micro-switch (set points less than 150 mbar): 1/4HP 6(1) A 240V ( UL, CSA VDE switch).

– On request: up to 25A 250V.

Action: momentary.

Set point calibration: Field adjustable with screw driver at+/- 20% of the factory calibration value.

Calibration limits: 150 to 1500 mbar.

Electrical connection: 6.35 x 0.8 mm terminals.

Maximum pressure: 6 bars (87 PSI).

Ambient temperature limits: 0 to 85°C.


Available pressure inlet fittings


References (SPDT contact, brass fitting, calibrated at 400 mbar):

Pressure inlet Standard rating micro-switch Low pressure micro-switch High rating micro-switch
1/8″ NPT MN30U145H040DE00 MN30U540H040DE00 MN30U647H040DE00
1/8″ BSPT MN30U145L040DE00 MN30U540L040DE00 MN30U647L040DE00
1/8″ BSPP MN30U145D040DE00 MN30U540D040DE00 MN30U647D040DE00
1/4″ NPT MN30U145K040DE00 MN30U540K040DE00 MN30U647K040DE00
1/4″ BSPT MN30U1452040DE00 MN30U5402040DE00 MN30U6472040DE00
1/4″ BSPP MN30U1453040DE00 MN30U5403040DE00 MN30U6473040DE00
Smooth spout dia 4mm MN30U145E040DE00 MN30U540E040DE00 MN30U647E040DE00
Spout dia 6mm MN30U145F040DE00 MN30U540F040DE00 MN30U647F040DE00
Fluted spout dia 6mm MN30U145G040DE00 MN30U540G040DE00 MN30U647G040DE00
Barbed spout dia 10mm MN30U145J040DE00 MN30U540J040DE00 MN30U647J040DE00

Other set point values: replace 040 in the product reference by the calibration value.


2D&3D Drawing