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    BY20 20KA SPDBY20 20KA SPD
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Desctription Symbol Unit Parameters & Models
Rated operational voltage Uc V 275 320 385 440
Nominal discharge current In kA 10 10 10 10
Maximum discharge current Imax kA 20 20 20 20
Voltage protection level Up Kv 1.0 1.2 1.5 1.8
Protection degree IP 20 20 20 20
Response time ns 25 25 25 25
Fuse A 20 20 20 20
Material PA6 PA6 PA6 PA6
Fire retardent (comply with) UL94V-0 UL94V-1 UL94V-2 UL94V-3
Standards IEC61643-1:1998
Single Phase Model L/N BY20-20/1-275 BY20-20/1-320 BY20-20/1-385 BY20-20/1-440
L,N BY20-20/2-275 BY20-20/2-320 BY20-20/2-385 BY20-20/2-440
L/N+NPE BY20-20/1+1-275 BY20-20/1+1-320 BY20-20/1+1-385 BY20-20/1+1-440
Three phase Model L1,L2,L3 BY20-20/3-275 BY20-20/3-320 BY20-20/3-385 BY20-20/3-440
L1,L2,L3,N BY20-20/4-275 BY20-20/4-320 BY20-20/4-385 BY20-20/4-440
L1,L2,L3,N+NPE BY20-20/3+1-275 BY20-20/3+1-320 BY20-20/3+1-385 BY20-20/3+1-440
Local indication: Green indicates normal state and red indicates failure.
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