Type 2+3 single-phase surge protector and filter - 120 V
Part Number: 77948
  • Surge protector with RFI filtering
  • In : 3 kA
  • Imax : 10 kA
  • Common and Differential mode protection
  • Low protection level
  • Operating/disconnection indicators
  • EN 61643-11, CEI 61643-11, UL1449 ed.4 compliance

The DS-HF is a secondary type 2 surge protector and RFI filter especially designed to protect sensitive equipment connected to single-phase networks. The 'surge protection' function is a completed by RFI filtering: this combination of functions result in enhanced efficiency against transient overvoltages and RF interferences. It is connected in series on AC network, downstream of a primary type 2 SPD, installed in the main electrical switchboard, to protect a remote or sensitive equipment.

Select another reference:

SPD type
following IEC test
2 (ou 3)
120 V single-phase
AC system
Nominal line voltage
120 Vac
Max. AC operating voltage L-N
150 Vac
Max. load current
16 A
Temporary Over Voltage (TOV) Charasteristics - 5 sec.
without disconnection
180 Vac withstand
Temporary Over Voltage (TOV) Charasteristics - 120 mn
without disconnection or with safety disconnection
230 Vac disconnection
Operating current
Continious current at Uc
< 1 mA
Follow current
Nominal discharge current
15 x 8/20 µs impulses
3 kA
Max. discharge current
max. withstand @ 8/20 µs by pole
10 kA
Total Maximal discharge current
max. total withstand @ 8/20 µs
10 kA
Withstand on Combinaison waveform IEC 61643-11
Class III test: 1.2/50µs - 8/20µs
10 kV
Withstand on overvoltages IEEE C62.41.1
10 kV
Admissible short-circuit current
10000 A
RFI Filtering
0.1 - 30 MHz
Connection mode(s)
Protection mode(s)
Common/Differential mode
Protection level CM/DM
@ In (8/20µs)
0.6 kV/0.5 kV
SPD configuration Single phase
Connection to Network by screw terminals: 0.75 - 4 mm²
Plug-in modular box
Symmetrical rail 35 mm (EN60715)
Housing material Thermoplastic UL94-V0
Operating temperature -40/+85°C
Protection rating IP20
Failsafe behavior Disconnection SPD - Signaling
Disconnection indicator Green led(s) off
See diagram
Standards compliance
IEC 61643-11 / EN 61643-11 / UL1449 4ed.
Thermal disconnector Internal
Installation ground fault breaker Type 'S' or delayed
Fuses type gG - 20 A max. (if necessary)