Siemens manufactures the 5SD74640 surge arrester, which has a discharge capacity of 40 kA. This device is designed to protect electrical systems by safely diverting surge currents. Typical applications include safeguarding residential and commercial electrical installations from voltage spikes and transient surges.
| Type |
Surge arrester |
| Category type 2 |
TRUE |
| Construction size |
4 modular spacing |
| Degree of protection (IP) |
IP20 |
| Dim |
(L x W x H) 71.5 x 71.5 x 90 mm |
| Height |
90mm |
| Integrated backup fuse |
FALSE |
| IP rating |
IP20 |
| Leakage current |
40kA |
| Length |
71.5mm |
| Manufacturer part # |
5SD74640 |
| Max. conductor cross section flexible (fine-strand) |
25mm² |
| Max. conductor cross section solid (solid, stranded) |
35mm² |
| Max. continuous voltage AC |
350V |
| Max. discharge surge current (8/20) |
40 |
| Max. overcurrent protection device, parallel connection (fuse) |
125 |
| Max. overcurrent protection device, series connection (fuse) |
80 |
| Misc Attribute |
Material: PA 6.6/PBT |
| Nominal discharge surge current (8/20) |
40kA |
| Nominal voltage |
230V AC |
| Nominal voltage AC |
230V |
| Number of conductors (without earthing) |
3 |
| Operating Temperature |
-40 °C - +80°C |
| RoHS-compliant |
Yes |
| Short-circuit breaking capacity (Isccr) |
25 |
| Signalling at the device |
None |
| 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 |
1.4kV |
| Voltage protection level N-PE |
1.5kV |
| Width |
71.5mm |
| With remote signalling contact |
FALSE |
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