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, IEC 61643-11, UL1449 ed.5 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.

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SPD type
120 V single-phase
AC system
Nominal line voltage
Un 120 Vac
Max. AC operating voltage
Uc 150 Vac
Max. load current
IL 16 A
Temporary Over Voltage (TOV) Characteristics - 5 sec.
Without disconnection
UT 180 Vac withstand
Temporary Over Voltage (TOV) Characteristics - 120 mn
Without disconnection or with safety disconnection
UT 230 Vac disconnection
Residual Current
Leakage current to Ground
Ipe < 1 mA
Operating current
Continious current at Uc
Ic < 1 mA
Follow current
If None
Nominal discharge current
15 x 8/20 µs impulses
In 3 kA
Max. discharge current
max. withstand @ 8/20 µs by pole
Imax 10 kA
Total Maximum discharge current
max. total withstand @ 8/20 µs
Imax Total 10 kA
Withstand on Combination waveform IEC 61643-11
Class III test: 1.2/50µs - 8/20µs
Uoc 10 kV
Withstand on overvoltages IEEE C62.41.1
10 kV
RFI Filtering
0.1 - 30 MHz
Connection mode(s)
Protection mode(s)
Common/Differential mode
Protection level
@ In (8/20µs)
Up 0.6 kV / 0.5 kV
Admissible short-circuit current
Isccr 10 000 A
SPD configuration
Single phase
Connection to Network
By screw terminals: 0.75-4mm²
Plug-in modular box
Symmetrical rail 35 mm (EN 60715)
Housing material
Thermoplastic UL94 V-0
Operating temperature
Tu -40/+85°C
Protection rating
Failsafe mode
Disconnection from AC network
Disconnection indicator
Signaling, Green led(s) OFF
See diagram
0.24 kg
Standards compliance
IEC 61643-11 / EN 61643-11 / UL1449 ed.5
Thermal disconnector
Installation ground fault breaker
Type 'S' or delayed
Back-up protection device
Fuses type gG - 20 A max. (if necessary)