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Screw Mounting SPD Parallel Connection

SPD for on site instruments; 2/3/4 wires; mounted in parallel through thread: 3/4 ''NPT, male; C2: 20kV/10kA, D1: 2.5kA/line; intrinsic safety and flameproof: Ex ia IIC T4~T6 Ga, Ex d IIC T4~T6 Gb;

  • Screw Mounting SPD Parallel Connection
  • Screw Mounting SPD Parallel Connection
  • Screw Mounting SPD Parallel Connection
  • Screw Mounting SPD Parallel Connection
  • Screw Mounting SPD Parallel Connection
  • Screw Mounting SPD Parallel Connection

Features & Advantages of Screw Mounting SPD Parallel Connection

  • Intrinsic safety certification; explosion proof electrical product certification.

  • Suitable for 2, 3, 4 wire temperature transmitter, thermal resistor, thermocouple, flow meter, solenoid valve, RS-485, RS-232, etc.

Parameter of Screw Mounting SPD Parallel Connection


CZLBX-48CZLBX-48-3CZLBX-48-4
Technical data2-wire3-wire4-wire
Nominal operating voltage Un24V DC24V DC24V DC
Max. continuous operating voltage Uc48V DC48V DC48V DC
Nominal discharge current In(8/20µs)10kA10kA10kA
Max. discharge current Imax(8/20µs)20kA20kA20kA
Impulse current Iimp(10/350µs)2.5kA2.5kA2.5kA
Voltage protection level Up(8/20µs)85V85V85V
Voltage protection level Up(1kV/μs)600V600V600V
Bandwidth(-0.5dB)10MHz10MHz10MHz
Response time1ns1ns1ns
Housing protection grade(IEC60529)IP 65IP 65IP 65
Housing material304 stainless steel304 stainless steel304 stainless steel
Thread standardspecified in ordersspecified in ordersspecified in orders
Testing standardIEC 61643-21IEC 61643-21IEC 61643-21
Intrinsic safety certificationEx ia II C T4~T6 GaEx ia II C T4~T6 GaEx ia II C T4~T6 Ga
Flame-proof safety certificationEx d II C T4~T6 GbEx d II C T4~T6 GbEx d II C T4~T6 Gb
Functional safety certificationSIL3SIL3SIL3


Schematic Diagram of Screw Mounting SPD Parallel Connection


Screw Mounting SPD Parallel ConnectionScrew Mounting SPD Parallel Connection

Screw Mounting SPD Parallel ConnectionScrew Mounting SPD Parallel Connection

Screw Mounting SPD Parallel ConnectionScrew Mounting SPD Parallel Connection


Typical Applications of Screw Mounting SPD Parallel Connection


Screw Mounting SPD Parallel ConnectionScrew Mounting SPD Parallel Connection

Screw Mounting SPD Parallel Connection

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