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  • Series
  • Model
  • Brand / Made in
  • Din rail plug-in surge protector
  • 1-pair
  • Un: 48 V
  • Shield wire protection
  • Without line cut-off
  • IEC 61643-21 compliance
  • 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: Fipway, WorldFIP, FieldBus-h2
  • Nominal line voltage Un: 48 V
  • Max. DC operating voltage Uc: 53 Vdc
  • Max. frequency    f max.: > 20 MHz
  • Insertion loss: < 1 dB
  • Max. load current IL: 300 mA
  • Max. discharge current Imax: 20 kA
  • Line inductance: No
  • Protection level Up: 75 V
  • Nominal discharge current In: 5 kA
  • Line resistance: < 4.7 Ohm


  • Technology: GDT+Clamping diode
  • SPD configuration: 1-pair+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
  • Protection rating: IP20
  • Failsafe mode: Short-circuit
  • Spare module(s): DLAM-48dBC
  • Dimensions: See diagram


  • Standards compliance: IEC 61643-21 / EN 61643-21 / UL497A
  • Certification: UL listed / EAC


  • DLA-48DBC 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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