Current Loop Surge Protector 4-20mA, SUG-4-20mA

SUG-4-20mA, overcurrent protection for 4-20mA, 0-20mA, HART current loop.

SUG-4-20mA is designed to protect current loops used in industrial automation systems and other measurement systems.

The low attenuation of protective circuits allows for the transmission of digital signals imposed on the current loop, such as the HART protocol.

The product has 3 protective levels limiting both surge voltage and surge current. The use of automatic MOSFET fuses with a load of 100mA and very low hysteresis significantly increases the protective efficiency compared to traditional protective solutions.

High-quality window terminals with high current load limit the risk of damage during large surge impulses and momentary current overloads.

The product is designed for installation at the boundary between LPZ0 and LPZ1 zones or higher. It can be used with a 24V DC current loop potential.

 

Current loop surge protector diagram

Simplified internal diagram.

 

To ensure proper overvoltage protection, it is recommended to use limiters at both ends of the power line and to properly ground them.

 

Current loop overvoltage protection

Proper use of the product for current loop protection.

 

Technical specifications

PARAMETER NAME
 VALUE
Number of protected tracks
 3 (2+shield)
Input / output connector
 Screw
Rated DC voltage (Un)
 24V
Maximum DC voltage (Uc)
 27V
Maximum AC voltage (Uc) 19V
Nominal current (In)
 100mA
Maximum nominal current 100.5mA
Decoupling element
 MOSFET fuse
C1: Discharge current line-line 8/20µs (In)
 0.5kA
C2: Discharge current line-ground 8/20µs (In) 10kA
C2: Maximum discharge current line-ground 8/20µs (Imax) 20kA
D1: Maximum lightning current 10/350µs (Iimp)
 3.5kA
Protection level 1kV/μs (line-line) Up 30V DC
Series resistance
7Ω / line
Dimensions 57 x 32 x 28 (mm)
Mounting method Freestanding housing
Grounding method
 Wire
Housing tightness IP20
Operating Temperature -40ºC~80ºC