2-pair Telecom surge protector unit
B280-T
B280-T
Part Number: 72726
  • 2-pair surge protection unit
  • For Telephone lines
  • Removable protection circuit
  • Wall mounting and screw connection
  • UL497 A&B
Installation Sheet

The B280 units are designed to protect terminals connected to telephone or data networks. The protection printed circuit is removable for easy and fast maintenance (S280). 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. load current IL 300 mA
Max. frequency f max. > 10 MHz
Insertion loss < 1 dB
Max. discharge current Imax 20 kA
Protection mode(s) Common/Differential mode
Protection level Up 220 V
Impulse current Iimp 2.5 kA
Nominal discharge current In 5 kA
Technology GDT+Clamping diode
SPD configuration 2 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 -40/+85°C
Protection rating IP20
Failsafe mode Short-circuit - transmision cut-off - fault mode 2
Spare module(s) S280-T
Dimensions See diagram
Standards compliance IEC 61643-21 / EN 61643-21 / UL497A
Certification UL listed