Compact Type 2+3 hard wired surge protector
Part Number: 561321
  • Compact type 2 and 3 surge protector
  • For 24 Vac powerline
  • No leakage current
  • Wall mounting and hard wired connection
  • Failsafe behaviour : SPD disconnection + Light indicator off
  • IP65
  • EN 61643-11 and IEC 61643-11 compliance
Installation Sheet

MSB10 surge protectors Type 2 (or 3) are designed for effective protection of sensitive equipment, in addition to the surge protector installation (coordination surge protector). These surge protectors utilize a compact and economica scheme based varistors, to obtain a power flow relevant for secondary protection.

SPD type
following IEC test
24 V single-phase
AC system
Nominal line voltage
24 Vac
Max. AC operating voltage L-N
30 Vac
Operating current
Continious current at Uc
Follow current
Nominal discharge current
15 x 8/20 µs impulses
1 kA
Max. discharge current
max. withstand @ 8/20 µs by pole
2 kA
Withstand on Combinaison waveform IEC 61643-11
Class III test: 1.2/50µs - 8/20µs
3 kV
Admissible short-circuit current
10 000 A
Protection mode(s)
Common/Differential mode
Protection level
@ In (8/20µs)
200 V
Protection level L/N
@ In (8/20µs)
200 V
Protection level L/PE
@ In (8/20µs)
200 V
Protection level CM/DM
@ In (8/20µs)
200 V/200 V
Technology MOV+GDT
Connection to Network wires
Wall or plate
Housing material Thermoplastic UL94-V0
Operating temperature -40/+85°C
Protection rating IP20
Failsafe behavior Disconnection
Disconnection indicator Green led OFF
Voltage/operating indicator Green Led ON
See diagram
0.11 kg
Standards compliance
IEC 61643-11 / EN 61643-11
Installation ground fault breaker Type 'S' or delayed
Thermal disconnector Internal