ST2+3 (DM) - compact

DM-012/1 R DJ

Order number: A00931

coupling impedance (R – resistance)

  • coarse and fine surge protection for 2-core signalling lines
  • installation close to protected equipment
  • for protection of communication interfaces of I&C, electronic security and fire detection systems, etc. (mainly for RS-485 interfaces) against impact of surge voltage
  • coarse and fine surge protection in differential mode (core – core) and common mode (core – PE)

Technical parameters

Parameter name Parameter value
Type of SPD C2,C3
Location of SPD ST 2+3
Mounting DIN rail 35 mm
Nominal voltage Un 12 V DC
Maximum operating voltage Uc 10.20 V AC
Maximum operating voltage Uc 14.50 V DC
Nominal load current IL 0.060 A
Treshold frequency core-core f 1.70 MHz
Serial resistance per core R 6.80 Ω
C2 nominal discharge current (8/20 µs) per core In 10.00 kA
C2 voltage protection level mode core-PE at In Up 35 V
C2 voltage protection level mode core-core at In Up 35 V
C3 voltage protection level mode core-PE at 1 kV/µs Up 30 V
C3 voltage protection level mode core-core at 1 kV/µs Up 20 V
Response time core-core ta 1 ns
Response time core-PE ta 1 ns
Connection (input - output) terminals-terminals
Cross-section of connected conductors solid (max) 4.00 mm2
Cross-section of connected conductors stranded (max) 2.50 mm2
Degree of protection IP 20
Range of ambient temperatures (min/max) -40 / 80 °C
According to standard EN 61643-21+A1,A2:2013, IEC 61643-21+A1,A2:2012
ETIM Class EC001625
Customs tariff number 85363010
EAN 8595090509318

Files for download

  • Product dimensions

  • Basic circuit diagram