2-pair Data surge protector unit

Part Number: 72773
  • 2-pair surge protection unit
  • 24 V
  • Removable protection circuit
  • Wall mounting and screw connection
  • UL497 A&B

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 LS, 4-20 mA
Nominal line voltage Un 24 V
Max. DC operating voltage Uc 28 Vdc
Max. frequency f max. > 3 MHz
Insertion loss < 1 dB
Max. load current IL 300 mA
Max. discharge current Imax 20 kA
Protection mode(s) Common/Differential mode
Protection level Up 40 V
Protection level Up 20 V
Impulse current Iimp 2.5 kA
Nominal discharge current In 5 kA
Line resistance < 4.7 Ohm
Technology GDT+Clamping diode
SPD configuration 2 pairs
Connection to Network By screw terminal: cross section 0.4-1.5mm²
Format Wall mounting box
Mounting Wall mounting by screws (not supplied)
Housing material Thermoplastic UL94 V-0
Operating temperature Tu -40/+85°C
Protection rating IP20
Failsafe mode Short-circuit - transmision cut-off - fault mode 2
Spare module(s) S280-24D3
Dimensions See diagram
Weight 0.043 kg
Standards compliance IEC 61643-21 / EN 61643-21 / UL497A
Certification UL listed