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300 Series vacuum switch catalog

Technical Data

Housing: Brass (stainless steel on request)
Contact material: Silver AgNi (gold-plated on request for 357 series)

Adjustment range:

357/377: -50 / -500 mbar (±50 mbar) or -100 / -900 mbar (±100 mbar)
387: -150 / -500 mbar (±50 mbar) or -200 / -900 mbar (±100 mbar)

Working pressure (max):

357: 5 bar
377: 5 bar
387: 1 bar

Overpressure limit:

357 & 377: 15 bar
387: 5 bar

Operating temperature:

357 & 377: -30°C to +80°C (options up to +120°C depending on diaphragm)
387: 80°C to 120°C (UL version max. 85°C)

Diaphragm options: NBR, FKM, EPDM, HNBR, CR

Connections:

1/8” Gas conical (L1=10 mm)
1/4” Gas conical (L1=12 mm)
1/8” Gas cylindrical (L1=10 mm)
1/4” Gas cylindrical (L1=12 mm)

300 Series Diaphragm vacuum switch

The Euroswitch 350 series vacuum switches combines three powerful models – 357, 377, and 387 – into one versatile product line. These switches are designed for industrial and OEM applications where accurate vacuum measurement and reliable switching functions are required.

With a choice of N.O./N.C. contacts, SPDT changeover contacts, multiple diaphragm options, and different housing materials, the 350 series offers flexibility for a wide range of installations. Whether for compact OEM systems, heavy industrial machinery, or applications in harsh environments, this series delivers consistent performance with a long service life.

With adjustable pressure ranges from -50 mbar to -900 mbar, they guarantee high switching accuracy and a long service life. This makes the pressure switches particularly suitable for systems where precision and durability are of paramount importance. Whether for complex industrial processes or specific OEM requirements, Euroswitch vacuum switches are the ideal choice for reliable pressure control.