1-pair DIN rail plug-in Data surge protector

Part Number 6421021
  • Surge protection for 1-pair
  • Pluggable protection module
  • Optical fault indication
  • Remote signalling (DLAWTS1-48DC required for power supply)
  • Indirect shield connection
  • Indirect earthing
  • Signal interruption when module is disconnected
  • Conforms to IEC 61643-21, VDE 0845-3-1 and UL497A

The surge protection devices of the DLAWTS series protect I&C, telecommunication and data technology systems against lightning effects and overvoltages. These surge protectors have been developed for the protection of one twin wire and can be used for all applications with voltages from 6 V to max. 170 V and transmission rates up to 10 Mbps. The electrical circuitry of the DLAS consists of a combination of high-performance gas discharge tubes and fast-switching diodes for high discharge capacity and fast response. The shield connection is additionally earthed via a gas discharge tube. Earthing is simply done via the top-hat rail. When the plug-in module is disconnected, the transmission signal is interrupted. Error signalling is via a visual display and remote signalling.

RS232, RS485
Nominal line voltage
Un 12 V
Max. AC operating voltage
Uc 10 Vac
Max. DC operating voltage
Uc 15 Vdc
Max. frequency
f max. > 3 MHz
Insertion loss
< 1 dB
Max. load current
IL 300 mA
Max. discharge current
max. withstand @ 8/20 µs by pole
Imax 20 kA
Line inductance
Protection mode(s)
Common/Differential mode
Protection level
Following the test category C3 (IEC61643-21) - Line/Line
Up 30 V
Max. capacitance
C < 50 pF
Impulse current
2 x 10/350µs Test - D1 Category
Iimp 5 kA
Nominal discharge current
C2 Category
In 5 kA
Line/Line Nominal discharge current
C2 Category
In L/L 5 kA
Nominal Discharge Current, X-C (Line/Earth)
8/20µs Test x 10 - C2 Category
In L/PE 5 kA
Network type
Data Communication
GDT+Clamping diode+PTC (thermal resistor) + Resistor
SPD configuration
Connection to Network
By screw terminal: cross section 0.5-2.5mm²
Plug-in DIN box
Symmetrical rail 35 mm (EN 60715)
Housing material
Thermoplastic UL94 V-0
Operating temperature
Tu -40/+85°C
Protection rating
Failsafe mode
Specific version with line cut-off in case of removal plug-in module
With line cut-off in case of removal plug-in module
Disconnection indicator
Red light on
Spare module(s)
Remote signaling of disconnection
Trough control module
See diagram
0.065 kg
Standards compliance
IEC 61643-21 / EN 61643-21 / UL497A