The Finder 7P.21.8.440.0020 surge arrester provides robust surge protection designed specifically for switchboards. Its main attributes include high durability and efficiency in safeguarding electrical systems from voltage spikes. Finder's surge arrester is typically used to protect critical electrical infrastructure in industrial and commercial settings.
| Type |
Surge arrester |
| Category type 2 |
true |
| Construction size |
1 modular spacing |
| Degree of protection (IP) |
IP20 |
| Factory colour |
Grey |
| Integrated backup fuse |
false |
| Integrated short-circuit protection |
N/A |
| Integrated short-circuit protection selective to fuse gG |
N/A |
| IP Rating |
IP20 |
| Leakage-current free |
N/A |
| Max. conductor cross section flexible (fine-strand) |
N/A |
| Max. conductor cross section solid (solid, stranded) |
N/A |
| Max. continuous voltage AC |
440V |
| Max. continuous voltage DC |
N/A |
| Max. discharge surge current (8/20) |
40kA |
| Max. overcurrent protection device, parallel connection (fuse) |
125A |
| Max. overcurrent protection device, series connection (fuse) |
N/A |
| Max. PV-voltage |
N/A |
| Misc Attribute |
SPD type 2 |
| Mounting method |
DIN rail (top hat rail) 35mm |
| Nominal discharge surge current (8/20) |
N/A |
| Nominal voltage AC |
400V |
| Nominal voltage DC |
N/A |
| Number of conductors (without earthing) |
1 |
| Short-circuit breaking capacity (Isccr) |
25kA |
| Signalling at the device |
Optical |
| Surge protection for |
Switchboards |
| System configuration DC |
false |
| System configuration IT |
false |
| System configuration other |
false |
| System configuration TN |
true |
| System configuration TN-C |
true |
| System configuration TN-C-S |
true |
| System configuration TN-S |
true |
| System configuration TT |
false |
| Voltage protection level |
N/A |
| Voltage protection level L-N |
1.9kV |
| Voltage protection level N-PE |
1.9kV |
| Voltage Rating |
440V AC |
| With remote signalling contact |
false |
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