The Siemens 5SD74143 switchboard surge protection device offers a surge current capacity of 50 kA, providing robust protection for electrical systems. Designed for integration into switchboards, it is ideal for safeguarding sensitive equipment from voltage spikes. Typical applications include industrial, commercial, and residential electrical installations.
| Type |
Switchboard surge protection |
| Category type 2 |
TRUE |
| Construction size |
4 modular spacing |
| Degree of protection (IP) |
IP20 |
| Dim |
(L x W x H) 77.5 x 71.2 x 98.7 mm |
| Height |
98.7mm |
| Integrated backup fuse |
FALSE |
| IP Rating |
IP20 |
| Leakage Current |
50kA |
| Length |
77.5mm |
| Max. conductor cross section flexible (fine-strand) |
25mm² |
| Max. conductor cross section solid (solid, stranded) |
35mm² |
| Max. continuous voltage AC |
335V |
| Max. discharge surge current (8/20) |
50 |
| Max. overcurrent protection device, parallel connection (fuse) |
160 |
| Max. overcurrent protection device, series connection (fuse) |
80 |
| Misc Attribute |
Material: PA 6.6/PBT |
| Number of conductors (without earthing) |
3 |
| Operating Temperature |
-40 °C - +80°C |
| Short-circuit breaking capacity (Isccr) |
25 |
| Signalling at the device |
Optic |
| System configuration DC |
FALSE |
| System configuration IT |
FALSE |
| System configuration other |
FALSE |
| System configuration TN |
FALSE |
| System configuration TN-C |
FALSE |
| System configuration TN-C-S |
FALSE |
| System configuration TN-S |
FALSE |
| System configuration TT |
FALSE |
| Voltage protection level L-N |
1.2kV |
| Voltage protection level N-PE |
1.7kV |
| Voltage Rating |
230V |
| Width |
71.2mm |
| With remote signalling contact |
TRUE |
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