KM-DM-048/1-RB

Surge current arrester for data, signal and telecomms
Coarse and fine surge protection for 2 core telecommunications and signalling networks.

Use to protect RS-485 instrumentation and control lines, electronic security and fire detection systems.

Install close to equipment for protection of communication interfaces.

Category: Part: KM-DM-048/1RB
Order number
KM-DM-048/1-RB
Connection (input - output)
screwless terminals - screwless terminals
Nominal voltageUn
48V DC
Maximum operating voltage (AC/DC)Uc
36V AC/51V DC
Nominal load currentIL
0.5A
C2 Nominal discharge current (8/20μs) per coreIn
5kA
C2 Nominal discharge current (8/20μs) cores-PEItotal
10kA
C2 Voltage protection level mode core-core at lnUp
80V
C2 Voltage protection level mode core-PE at lnUp
95V
C3 Voltage protection level mode core-core/core-PE at 1kV/μsUp
65V
Response time core-core/core-PEta
1ns
Serial resistance per coreR
1.6Ω
Threshold frequency core-coref
5MHz
Cross-section of connected conductors (solid) (min - max)
0.08mm² - 4mm²
Cross-section of connected conductors (stranded) (min - max)
0.08mm² - 2.5mm²
Degree of protection
IP20
Range of operating temperatures (min - max)
-40°C - +70°C
Mounting
DIN rail 35mm
According to standard
EN 61643-21+A1,A2:2013, IEC 61643-21+A1,A2:2012 / C2, C3
ETIM Class
EC 001625
Weight
35g (nett), 60g (gross)
  • Screwless terminals
  • Coupling impedance (resistance)
  • Use on systems up to 48 volts

Coarse and fine surge protection in differential mode (core – core) and common mode (core – PE).

EN 61643-11 (surge protection devices).