2-pair Data surge protector unit
Part Number: 72751
  • 2-pair surge protection unit
  • 6 V
  • 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.

MIC/T2, 10BaseT
Nominal line voltage
6 V
Max. DC operating voltage 8 V
Max. load current
300 mA
Max. frequency
> 20 MHz
Insertion loss
< 1 dB
Max. discharge current
max. withstand @ 8/20 µs by pole
20 kA
Protection mode(s)
Common/Differential mode
Protection level
@ In (8/20µs)
25 V
Impulse current
2 x 10/350µs Test - D1 Category
2.5 kA
Nominal discharge current
8/20µs Test x 10 - C2 Category
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 behavior Short-circuit - transmision cut-off - fault mode 2
Spare module(s)
See diagram
Certification UL listed
Standards compliance IEC 61643-21 / EN 61643-21 / UL497A