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Zener Barrie SZ – An toàn trong những khu vực nguy hiểm
Zener Barrier

SZ series zen Barrier


SZ Series zener barrier is the important device related to intrinsically safe primary instrument and electrical device, which plays an important role in the intrinsically safe explosion-proof system. Zener barrier can limit fault energy to dangerous site to protect components by rapid fuse, zener diode, resistor and so on.

Zener barrier employs triple redundant circuit to be robust. The series products have diverse models, which can be integrated to intrinsically safety explosion-proof system with many field instruments, such as 4-20 mA analog transducer, 4-20 mA intelligent instrument with digital communication, flow instrument, electrical converter, thermal couple, RTD, switch, solenoid valve and so on. It is applicable to the oil, chemical, pharmaceutical, shipping, aeronautics and astronautics and so no.


Temperature (-20 - 60)℃ Continuous working temperature
(-40 - +80)℃ Storage temperature
Atmospheric pressure (80 - 110)KPa
Relative humidity ≤90%without rain
Explosion mark Ex(ia)ⅡC Ex(ia)ⅡB
Leakage current <10μA Leakage current<10μA
Terminal color Non-intrinsically safe terminal (danger zone) (wire terminal numbered 1, 2) label is yellow, without rain.
Intrinsically safe terminal (danger zone) (wire terminal numbered 3, 4) label is blue.
Dimension(mm) 93.5(length)×61.3(width)×14.2(thick)
Installaiton dimension 11.55mmFoot spacing of hex bolts