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Industrial Parts Catalog
Datasheet generated 2026-10-07
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Surge protection device SEM3-40/440 IT IR NSO (CP77707879M)

Function · Switchgear & Protection · Surge Protectors
Part Number
CP77707879M  ·  HS 8536.30
Surge protection device SEM3-40/440 IT IR NSO (CP77707879M)

Function CP77707879M Overvoltage protection IT 3 pole/al.kont (NSO).

Technical Specifications

Manufacturer part number (MPN)CP77707879M
EAN / GTIN8435297867678
Sales unitpcs
Package quantity40 pcs
System configuration DCNo
System configuration ITYes
System configuration TNNo
System configuration TN-CNo
System configuration TTNo
Number of conductors (without earthing)3
Nominal discharge surge current (8/20)20 kA
Max. discharge surge current (8/20)40 kA
Nominal voltage AC230 V
Max. continuous voltage AC275 V
Voltage protection level L-N2 kV
Short-circuit breaking capacity (Isccr)25 kA
Integrated backup fuseNo
Mounting methodDIN rail (top hat rail) 35 mm
Construction size3 modular spacing
Max. conductor cross section solid (solid, stranded)25 mm²
Max. conductor cross section flexible (fine-strand)25 mm²
With remote signalling contactYes
Signalling at the deviceOptical
Category type 2Yes
Degree of protection (IP)IP20
Country of originSpain

Properties

MOQ1

Cross-References

Attached Documents