4-pair Telecom surge protector unit
B480-T
B480-T
Part Number: 72746
  • 4-pair surge protection unit
  • For Telephone lines
  • Removable protection circuit
  • Wall mounting and screw connection
  • UL497 A&B

The B480 units are designed to protect terminals connected to telephone or data networks. The protection printed circuit is removable for easy and fast maintenance (S480). These compact boxes are designed for wall mouting and screw connection.


Network RTC, ADSL, SDSL, SHDSL
Nominal line voltage Un 150 V
Max. DC operating voltage Uc 170 V
Max. frequency f max. > 10 MHz
Insertion loss < 1 dB
Max. load current IL 300 mA
Max. discharge current Imax 20 kA
Total Maximal discharge current Imax Total 20 kA
Line inductance No
Protection mode(s) Common/Differential mode
Protection level Up 220 V
Protection level Up 20 V
Max. capacitance C < 70 pF
Impulse current Iimp 2.5 kA
Nominal discharge current In 5 kA
Type of diagram A
Line resistance < 4.7 Ohm
Technology GDT+Clamping diode
SPD configuration 4 pairs
Connection to Network screw terminal - mini/maxi cross section : 0.4/1.5 mm²
Format wall mounting box
Mounting wall (screws non included)
Housing material Thermoplastic UL94-V0
Operating temperature Tu -40/+85°C
Protection rating IP20
Failsafe mode Short-circuit - transmision cut-off - fault mode 2
Spare module(s) S480-T
Remote signaling of disconnection No
Dimensions See diagram
Weight 0.063 kg
Standards compliance IEC 61643-21 / EN 61643-21 / UL497A
Certification UL listed