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Features
A single product provides line-to-line and ground-to-ground protection
Single-phase two-wire ~ three-phase three-wire correspondence（MKY23）
Single-phase two-wire ~ three-phase four-wire correspondence（MKY44，MKYS2, MKYS4）
Equipped with a deterioration display function (Alarm contact terminal: S type)
Easy to install in the switchboard
DIN rail (35mm) mounting,
Connecting plate mounting
Transparent cover with anti-shock switch
Applications
Low-voltage power supply circuit for switchboards and distributors (AC100V/200V/400V)
Appearance diagram, Circuit diagram
![EG_]Y7_PTPW83X19(AGBZU](/uploadfile/202505/57a340c3344e1d4.png "EG_]Y7_PTPW83X19(AGBZU")
Product model identification
![LKO$I]2YB[WZIH[5V~C5WD](/uploadfile/202505/ec55b369e02a896.png "LKO$I]2YB[WZIH[5V~C5WD")
Installation examples (MKY23,MKYS2)
![P]MMQSNPB6DM1KEVM@(X37D](/uploadfile/202505/febbe301cecb913.png "P]MMQSNPB6DM1KEVM@(X37D")
Installation examples(MKY44,MKYS4)
![TZI)WM~]ZXL[~0_YIXV]]ZN](/uploadfile/202505/db49f2ca0f5388f.png "TZI)WM~]ZXL[~0_YIXV]]ZN")
Item | Measurement conditions | Performance | ||||||||||
MKY23-05 | MKY23-05S | MKY23-20 | MKY23-20S | MKY44-20 | MKY44-20S | MKYS2 | MKYS2S | MKYS4 | MKYS4S | |||
Maximum continuous operating voltage(Uc) | ─ | Single phase 2wire AC130V 250V Single phase 3wire AC110V/220V Three phase 3wire AC250V | Single phase 2wire AC130V 250V Single phase3wire AC110V/220V Three phase 3wire AC250V |
Three phase 3wire AC510V Three phase 4wire AC510V | Single phase 2wire AC130V250V Single phase 3wire AC110V 220V Three phase 3wire AC250V Three phase 4wire AC250V | Three phase 3wire AC510V Three phase 4wire AC510V | ||||||
Maximum inrush current(lmax) | 8/20µs | 10kA（3times） (Between the lines , between the ground ) | 40kA (Between the lines, between the ground ) | 20kA（Between the lines, between the ground） | ||||||||
Nominal discharge current (ln) | 8/20µs | 5 kA（Between the lines, between the ground ） | 20kA（Between the lines, between the ground） | 10kA（Between the lines, between the ground） | ||||||||
Voltage protection level (Up) | Based on IEC | 1.3kVor less （Between the lines） 1.5kVor less （between the ground） | 1.5kVor less （Between the lines） 1.5kVor less （between the ground） | 2.5kVor less （Between the lines） 2.5kVor less （between the ground） | 1.3kVor less （Between the lines） 1.5kVor less （between the ground） | 2.4kVor less （Between the lines） 2.4kVor less （between the ground） | ||||||
GUANGZHOU SANKOSHA LIGHTNING PROTECTION TECHNOLOGY CO.,LTD
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