2-pair monobloc Data surge protector

Part Number: 640404
  • For DIN rail mounting
  • Monobloc housing
  • 2-pair
  • Un: 48 V
  • IEC 61643-21 compliance
  • UL497A

DLU2 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. These products are 2-pair surge protectors and are made with DIN rail monobloc enclosure

48 V line, ISDN-T0, Profibus-PA
Nominal line voltage
Un 48 V
Max. DC operating voltage
Uc 53 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 70 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 resistance
< 4.7 Ohm
Network type
GDT+Clamping diode
SPD configuration
2 pairs
Connection to Network
By screw terminal - cross section 1.5-2.5mm²
DIN box
Symmetrical rail 35 mm (EN 60715)
Housing material
Thermoplastic UL94 V-0
Operating temperature
Tu -40/+85°C
Protection rating
Failsafe mode
Disconnection indicator
Transmission interrupt - default mode 2
Remote signaling of disconnection
See diagram
Standards compliance
IEC 61643-21 / EN 61643-21 / UL497A
UL 497B