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  • Series
  • Model
  • Brand / Made in
  • 1-pair DIN rail plug-in Telecomsurge protector
  • SPD configuration: 1-pair+shielded
  • Network: RTC, ADSL2, VDSL2
  • Technology: GDT+Clamping diode
  • Max. DC operating voltage: 170 Vdc
  • Max. discharge current: 20 kA
  • Without line cut-off
  • DIN rail mounting and screw connection
  • Standards compliance: IEC 61643-21 / EN 61643-21 / UL497A

DLA surge protectors are designed to protect, against surge voltages due to lightning, terminals equipment connected to industrial buses, telecom lines or datalines. These surge protectors must be installed on symmetrical DIN rail and are available for most of the transmission lines: line voltage from 6 to 170V, bitrate up to 10 Mbit/s. D3 types aim to realize fine protection and D2 types is specific for floating application. These products are 1-pair surge protectors with removable module for easy maintenance.


  • Network: RTC, ADSL2, VDSL2
  • Nominal line voltage Un: 150 V
  • Max. DC operating voltage Uc: 170 Vdc
  • Max. frequency f max.: > 10 MHz
  • Insertion loss: < 1 dB
  • Max. load current IL: 300 mA
  • Max. discharge current by pole Imax: 20 kA
  • Line inductance: No
  • Protection level L/L Up: 220 V
  • Protection level L/PE Up: 20 V
  • Impulse current Iimp: 5 kA
  • Nominal discharge current In: 5 kA
  • Line resistance: < 4.7 Ohm


  • Technology: GDT+Clamping diode
  • SPD configuration: 1 pairs + shielded
  • Connection to Network: By screw terminal: cross section 0.4-1.5mm²
  • Mounting: Symmetrical rail 35 mm (EN 60715)
  • Housing material: Thermoplastic UL94 V-0
  • Operating temperature: -40/+85°C
  • Protection rating: IP20
  • Failsafe mode: Short-circuit 
  • Spare module(s): DLAM-170
  • Dimensions: See diagram


  • Standards compliance: IEC 61643-21 / EN 61643-21 / UL497A


  • DLA-170 surge protectors are connected in serial on the network. 
  • The protected equipment must be nearby (protector/equipment distance less than 10 m long). If this rule cannot be followed, «secondary» protection must be installed near the equipment (coordinated surge protection).
  • The total length connection wires to network must be lower than 0.5 m in order not to increase the protection level (Up) provided by the SPD.
  • Wiring is made by screw connections. 
  • The protection wire coming from the SPD must be connected to the bonding bar of the electrical panel. 
  • Local earthing resistance must be in compliance with the electrical rules.

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