Katko LoadSafe load break switches 16–40A are compact and versatile solutions designed for efficient load switching in smaller electrical systems. Available in 2-, 3-, 4-, 6- and 8-pole versions. The robust switch design and silver-contact technology ensure safe and durable operation in demanding environments.
The load break switches are VDE-approved and independently tested by third parties, ensuring compliance with international quality and safety standards. Manufactured in Finland, these switches and accessories provide high performance and installation efficiency, helping you build durable power distribution solutions.
E-number FI
GTIN
6419410257746
Rated operational current AC-22A 415V (A)
40
Rated operational current AC-22A 690V (A)
40

Product details and documents
Technical data
Depth
63 mm
ETIM Class
EC000216
E-number FI
3609696
GTIN
6419410257746
Height
84 mm
Long product name
Rotary switch, 4-pole
Max. term. torque (Nm)
1.8
Mech. endurance (no. of oper.)
50000
Net weight
0.1 kg
Nom. values w/cable size (mm²)
16
Number of poles
4
Product type
KU 440
Rated breaking cap. ICN AC-23A 415V (A)
320
Rated breaking cap. ICN AC-23A 500V (A)
200
Rated breaking cap. ICN AC-23A 690V (A)
200
Rated fused short-ckt current back-up fuse opt 1 (A)
40
Rated fused short-ckt current peak value (kA)
4.5
Rated fused short-ckt current RMS Ik opt 1 (kA)
25
Rated fused short-ckt. impulse withstand volt. Uimp (kV)
8
Rated insulation volt. Ui (V)
800
Rated operational current AC-21A 415V (A)
40
Rated operational current AC-21A 500V (A)
40
Rated operational current AC-21A 690V (A)
40
Rated operational current AC-22A 415V (A)
40
Rated operational current AC-22A 500V (A)
40
Rated operational current AC-22A 690V (A)
40
Rated operational current AC-23A 415V (A)
40
Rated operational current AC-23A 500V (A)
25
Rated operational current AC-23A 690V (A)
25
Rated oper. power 3-ph 1500rpm SQ cage motor AC-23A 415V (kW)
22
Rated oper. power 3-ph 1500rpm SQ cage motor AC-23A 500V (kW)
15
Rated oper. power 3-ph 1500rpm SQ cage motor AC-23A 690V (kW)
22
Rated short-ckt. making cap. Icm 690V (kA)
1
Rated short-time withstand current 1s Icw 690V (kA)
0.7
Rated therm. current Ith (A)
63
Short product description
Load break switch 4x40A
Switch type
Load Break Switch
Technical name
4x40A 690V AC-22
Terminals bolt size (Cu mm²)
1,5..16
Volume
0.254 l
Width
48 mm
Dimensional drawing
Logistical data
Package size 1
1
Package size 1 depth
63 mm
Package size 1 GTIN code
6419410257746
Package size 1 height
84 mm
Package size 1 volume
0.3334 l
Package size 1 weight
0.105 kg
Package size 1 width
63 mm
Sales unit
1
Downloadables
- Dimensional drawings media (1385d634b7ef375759c283c7524bf1739b4f89dd_LoadSafe_KU4P_16_40_Dim.png)
- Brochures (4c8f06d638a121ff864ef932f16f3b2de91e7803_KATKO_LoadSafe_catalogue_102024_en.pdf)
- Brochures (4e35c4a88ba0a39ae59459765a5755dd5d53529c_KATKO_LoadSafe_catalogue_082022_fi.pdf)
- Brochures (f6793a90307c0105bc88f68827eddf357692265a_KATKO_LoadSafe_KU_16_40A_brochure_122025_en.pdf)
- Brochures (c776d5784d58049ab2bdb9a816ab9d7e01a56513_KATKO_LoadSafe_KU_16_40A_brochure_122025_fi.pdf)
- Brochures (c759ccfed904a4b4ac566812c75ccb3b6e389983_KATKO_LoadSafe_KU16_40A_accessories_leaflet_122025_en.pdf)
- Brochures (2913fca4b29b6c2e89777576855d14ef79c23b98_KATKO_LoadSafe_KU16_40A_accessories_leaflet_122025_fi.pdf)
- Installation manuals (32f0c162f0058cfb530320b1f8468f2a9e50af2d_KATKO_LoadSafe_KU_LSF_RT_16_40_installation_manual_103_en.pdf)
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